Create a “Chemical Reaction Poster” that will summarize key concepts about chemical reaction. In your poster, include
Definition of chemical reaction and balanced equation
Steps in balancing chemical equation and an example
Types of chemical reaction and an example for each
Picture/images related to chemical reaction
Other related information
Rubric:
Content ……………………25 points
Organization ……….… 25 points
Neatness/Creativity... 15 points

please help so it can bring my grade up
thank you soo much
project*

To hasten the solution process, we can choose the correct solvent for the solute, pulverize the solute to increase its surface area, increase the temperature of the solvent.

Effect of Solvent:

H2O = most soluble

alcohol = least soluble

glycerin = intermediate solubility

The salt is most soluble in water because salt is an ionic compound and water is a polar solvent. "Like dissolves like" means that substances with similar polarity and intermolecular forces tend to dissolve each other. Water is a polar solvent, meaning it has a partial positive charge on one end and a partial negative charge on the other, while salt is an ionic compound made up of positively and negatively charged ions. The partial charges on the water molecule can interact with the ions of salt, causing the salt to dissolve.

The choice of solvent affects the dissolving process because it determines the ability of the solvent to interact with the solute. Solvents that are similar in polarity and intermolecular forces to the solute tend to dissolve the solute more easily.

Effect of Pulverizing:

crystal = longest dissolving time

pulverized = shortest dissolving time

The dissolving rates are different because pulverizing the salt increases its surface area, exposing more salt to the solvent and allowing for a greater opportunity for the solute-solvent interactions to occur.

Effect of Temperature:

cold = longest dissolving time

hot = shortest dissolving time

Increasing the temperature of the solvent increases the kinetic energy of the solvent molecules, which leads to more frequent and energetic collisions with the solute particles, resulting in faster dissolving rates.

Effect of Stirring:

stirred = shorter dissolving time

unstirred = longer dissolving time

Stirring increases the rate of the dissolving process by helping to disperse the solute particles evenly throughout the solvent, increasing the surface area of the solute that is in contact with the solvent, and promoting the mixing of the solute and solvent.

Conclusions:

To hasten the solution process, we can choose the correct solvent for the solute, pulverize the solute to increase its surface area, increase the temperature of the solvent, and stir the solution to disperse the solute particles evenly throughout the solvent.

Learn more about solubility here

https://brainly.com/question/28170449

#SPJ1

Answer: A

Explanation:

You thought i was feeling you that n was a munch

Answer:

To convert 675000 to scientific notation, we need to express it in the form a × 10^n, where a is a number between 1 and 10 (but not 10 itself), and n is an integer.

Starting with 675000, we can divide by 10 repeatedly until we get a number between 1 and 10.

675000 ÷ 10 = 67500 (one division by 10)

67500 ÷ 10 = 6750 (two divisions by 10)

6750 ÷ 10 = 675 (three divisions by 10)

Now we have a number between 1 and 10 (namely, 6.75), and we know that we divided by 10 three times, so the exponent is -3.

Therefore, we can express 675000 in scientific notation as:

6.75 × 10^5

(Note that we could also express it as 6.75 × 10^2 × 10^3, but this is not in standard scientific notation, which requires the coefficient to be between 1 and 10.)

Answer:

53.69 mg/m³

Explanation:

To calculate the concentration of ethyl acetate in milligrams per cubic meter, we need to know the total volume of the room and the amount of ethyl acetate that evaporated in grams.

The total volume of the room is:

V = l x w x h

V = 9.00 m x 6.00 m x 3.00 m

V = 162.00 cubic meters

To convert the amount of ethyl acetate evaporated from grams to milligrams, we multiply by 1000:

amount of ethyl acetate = 8.701 g = 8,701 mg

Now we can calculate the concentration of ethyl acetate in milligrams per cubic meter:

concentration = amount of ethyl acetate / volume of room

concentration = 8,701 mg / 162.00 cubic meters

concentration = 53.69 mg/m³

Therefore, the concentration of ethyl acetate in the unventilated room is 53.69 mg/m³.

Answer:

1. The balanced equation is 2KCIO3 → 2KCI + 3O2. According to the law of conservation of mass, the mass of the reactants must equal the mass of the products. Therefore, the mass of oxygen produced is:

Mass of oxygen = Mass of KCIO3 - Mass of KCI

Mass of oxygen = 500 g - 303 g

Mass of oxygen = 197 g

Therefore, 197 g of O2 are produced.

2. The balanced equation is N2 + 3H2 → 2NH3. We need to find out how much H2 is needed to react with 100 g of N2 to produce 121 g of NH3. First, we need to calculate the number of moles of N2 and NH3:

Moles of N2 = Mass of N2 / Molar mass of N2

Moles of N2 = 100 g / 28 g/mol

Moles of N2 = 3.57 mol

Moles of NH3 = Mass of NH3 / Molar mass of NH3

Moles of NH3 = 121 g / 17 g/mol

Moles of NH3 = 7.12 mol

According to the balanced equation, 1 mole of N2 reacts with 3 moles of H2 to produce 2 moles of NH3. Therefore, the number of moles of H2 needed is:

Moles of H2 = Moles of N2 x (3/1)

Moles of H2 = 3.57 mol x 3

Moles of H2 = 10.71 mol

Finally, we can calculate the mass of H2 needed:

Mass of H2 = Moles of H2 x Molar mass of H2

Mass of H2 = 10.71 mol x 2 g/mol

Mass of H2 = 21.42 g

Therefore, 21.42 g of H2 are needed.

3. The balanced equation is 4Fe + 3O2 → 2Fe2O3. We need to find out how much oxygen is needed to react with 350 g of Fe to produce 500 g of Fe2O3. First, we need to calculate the number of moles of Fe and Fe2O3:

Moles of Fe = Mass of Fe / Molar mass of Fe

Moles of Fe = 350 g / 55.85 g/mol

Moles of Fe = 6.26 mol

Moles of Fe2O3 = Mass of Fe2O3 / Molar mass of Fe2O3

Moles of Fe2O3 = 500 g / 159.69 g/mol

Moles of Fe2O3 = 3.13 mol

According to the balanced equation, 4 moles of Fe react with 3 moles of O2 to produce 2 moles of Fe2O3. Therefore, the number of moles of O2 needed is:

Moles of O2 = Moles of Fe x (3/4)

Moles of O2 = 6.26 mol x (3/4)

Moles of O2 = 4.69 mol

Finally, we can calculate the mass of O2 needed:

Mass of O2 = Moles of O2 x Molar mass of O2

Mass of O2 = 4.69 mol x 32 g/mol

Mass of O2 = 150.08 g

Therefore, 150.08 g of O2 are needed.

4. The balanced equation is CH2 + 2O2 → CO2 + 2H2O. We know that 16 g of CH2 reacts with 64 g of O2 to produce 44 g of CO2. We need to find out how much water is produced. First, we need to calculate the number of moles of CH2 and CO2:

Moles of CH2 = Mass of CH2 / Molar mass of CH2

Moles of CH2 = 16 g / 14 g/mol

Moles of CH2 = 1.14 mol

Moles of CO2 = Mass of CO2 / Molar mass of CO2

Moles of CO2 = 44 g / 44 g/mol

Moles of CO2 = 1 mol

According to the balanced equation, 1 mole of CH2 reacts with 2 moles of O2 to produce 2 moles of H2O. Therefore, the number of moles of H2O produced is:

Moles of H2O = Moles of CH2 x (2/1)

Moles of H2O = 1.14 mol x 2

Moles of H2O = 2.28 mol

Finally, we can calculate the mass of H2O produced:

Mass of H2O = Moles of H2O x Molar mass of H2O

Mass of H2O = 2.28 mol x 18 g/mol

Mass of H2O = 41.04 g

Therefore, 41.04 g of H2O are produced.

5. The balanced equation is CaCO3 → CaO + CO2. We need to find out how much CO2 is produced from the decomposition of 200 g of CaCO3 if 112 g of CaO are produced. First, we need to calculate the number of moles of CaCO3 and CaO:

Moles of CaCO3 = Mass of CaCO3 / Molar mass of CaCO3

Moles of CaCO3 = 200 g / 100.09 g/mol

Moles of CaCO3 = 1.999 mol

Moles of CaO = Mass of CaO / Molar mass of CaO

Moles of CaO = 112 g / 56.08 g/mol

Moles of CaO = 1.999 mol

According to the balanced equation, 1 mole of CaCO3 produces 1 mole of CaO and 1 mole of CO2. Therefore, the number of moles of CO2 produced is:

Moles of CO2 = Moles of CaCO3 x (1/1)

Moles of CO2 = 1.999 mol

Finally, we can calculate the mass of CO2 produced:

Mass of CO2 = Moles of CO2 x Molar mass of CO2

Mass of CO2 = 1.999 mol x 44 g/mol

Mass of CO2 = 87.96 g

Therefore, 87.96 g of CO2 are produced.

Answer:

Introduction: (5 points)

Before diving into each topic, it's important to understand why alternative energies are important. Fossil fuels are limited resources that produce harmful emissions and contribute to climate change. Therefore, we must turn to alternative energies to reduce our reliance on these resources and mitigate their negative impacts on the environment. In this presentation, we will discuss five alternative energies: Biomass, Geothermal, Hydroelectric, Hydrogen, Solar Power, and Wind Energy.

Biomass: (10 points)

1.

Biomass refers to organic matter, such as wood, crops, and waste, that can be converted into energy. Biomass can be used as a substitute for gasoline to run cars, trucks or buses.

2.

Biomass can be used to heat homes through wood stoves, pellet stoves, and biomass boilers.

3.

Advantages of biomass include its renewability, availability, and its ability to reduce waste. However, it can also lead to deforestation, land-use change, and pollution.

4.

Biomass energy production involves converting potential energy (stored in biomass) into kinetic energy (in the form of steam), which is then used to generate electricity.

Geothermal:

5.

Geothermal energy comes from the heat within the Earth's crust.

6.

Geothermal energy can be used to create electricity through steam turbines.

7.

Geothermal energy can be used directly to heat homes and factories through geothermal heat pumps.

8.

A heat pump is a device that transfers heat from a colder area to a hotter area.

9.

Advantages of geothermal energy include its reliability, low emissions, and its ability to provide heating and cooling. However, it can also lead to land subsidence, water pollution, and seismic activity.

Hydroelectric:

10.

Hydroelectric power is electricity generated from the movement of water.

11.

Moving water turns a turbine, which spins a generator to produce electricity. The dam is used to regulate the flow of water and to control the amount of electricity generated.

12.

Advantages of hydroelectric power include its renewability, efficiency, and ability to provide flood control. However, it can also lead to the displacement of communities, harm aquatic life, and reduce downstream water availability.

13.

The Hoover Dam in Nevada is an example of a hydroelectric power plant.

Hydrogen:

14.

Using hydrogen as a fuel source involves combining it with oxygen to produce energy in the form of electricity and water vapor.

15.

Hydrogen is found in water, fossil fuels, and organic matter.

16.

Advantages of using hydrogen as a fuel source include its renewability, abundance, and its ability to reduce emissions. However, it can also be expensive to produce, transport, and store.

17.

A fuel cell is an electrochemical device that converts hydrogen and oxygen into electricity. It works by passing hydrogen through an anode, where it is oxidized, producing electrons and protons. The electrons flow through a circuit to produce electricity, while the protons pass through a membrane to the cathode, where they combine with oxygen to form water.

Solar Power:

18.

Solar energy is energy from the sun that can be converted into electricity.

19.

A solar cell is made of a semiconductor material, such as silicon, that absorbs photons from the sun and generates electrons. These electrons flow through a circuit to produce electricity.

20.

Advantages of solar energy include its renewability, low emissions, and its ability to reduce dependence on fossil fuels. However, it can also be expensive to install, dependent on weather conditions, and can lead to land-use change.

21.

The Topaz Solar Farm in California is an example of solar energy being used in the U.S.

Wind Energy

22.

Wind energy is a type of renewable energy that comes from the wind. Wind energy is generated by the movement of air across the earth's surface caused by differences in temperature and pressure. Wind turbines are used to convert wind energy into electrical energy.

23.

Wind energy is converted into electrical energy by wind turbines. The turbines are equipped with blades that capture the wind and spin a rotor. The rotor turns a shaft, which drives a generator that produces electricity.

24.

Advantages of wind energy include:

Disadvantages of wind energy include:

25.

Alta Wind Energy Center in California is an example of a wind energy project in the US. It is one of the largest wind farms in the world, with a total capacity of 1,548 MW.

The conclusion is the result of the experiment, which supports the hypothesis by stating that 100mL of water yielded the highest mass and height of plants.

Hypothesis: If a plant receives more water, it will grow more.

Independent Variable: Amount of water.

Conclusion: 100mL of water yielded the highest mass and height of plants.

In this experiment, Hypothesis states the relationship between the independent variable and the dependent variable. The independent variable is the amount of water, and the dependent variable is the growth of the plants.

The conclusion is the result of the experiment, which supports the hypothesis by stating that 100mL of water yielded the highest mass and height of plants.

To know more about water yield, visit:

https://brainly.com/question/16359786

#SPJ1

Answer:

A. The complete balanced chemical equation, including phase labels, for the reaction is:

BaCl2 (aq) + K2O (aq) → BaO (s) + 2KCl (aq)

B. The type of reaction that has occurred is a double displacement or metathesis reaction. In this reaction, the barium cations (Ba2+) and potassium anions (K+) exchange partners, resulting in the formation of solid barium oxide (BaO) and aqueous potassium chloride (KCl).

C. The indicator that tells you a chemical reaction has occurred is the formation of a solid precipitate. In this reaction, the solid barium oxide (BaO) that forms is a clear indication that a chemical reaction has occurred. Additionally, the fact that the reactants are aqueous and the products include both a solid and an aqueous solution also indicates a chemical reaction has taken place.

The appropriate product are: 2Na(s) + F₂(g) → 2NaF(s), Na(s) + 1/2F₂(g) → NaF(s) and H₂(g) + 1/2O₂(g) → H₂O(g).

The prοcess by which οne οr mοre substances, referred tο as reactants, are changed intο οne οr mοre distinct substances, referred tο as prοducts, by the rearranging οf atοms and the breaking and fοrming οf chemical bοnds, is referred tο as a reactiοn. Chemical equatiοns that display the reactants οn the left and the prοducts οn the right, with an arrοw pοinting in the reactiοn's directiοn, can be used tο describe chemical reactiοns.

The amοunt οf energy released οr absοrbed when οne mοle οf a cοmpοund is prοduced frοm its cοmpοnent elements in their standard states at 1 atm and 25°C is knοwn as the standard enthalpy οf fοrmatiοn, οr Hf. The reactants must be in their standard states and the prοducts must be οne mοle οf the cοmpοund created frοm the cοnstituent elements in their standard states fοr a reactiοn tο have Hrxn equal tο Hf οf the prοduct(s).

These standards allοw us tο cοnclude that the subsequent reactiοns cοmply with the requirements:

2Na(s) + F₂(g) → 2NaF(s)

Na(s) + 1/2F₂(g) → NaF(s)

H₂(g) + 1/2O₂(g) → H₂O(g)

To know more about chemical reaction, visit:

brainly.com/question/29039149

#SPJ1

4.5 billion years old

hope this helps

Answer:

Earth's water is 4.5 billion years old.

Explanation:

Water is a transparent, odorless, tasteless liquid, a compound of hydrogen and oxygen, H2O, freezing at 32°F or 0°C and boiling at 212°F or 100°C, that in a more or less impure constitutes rain, oceans, lakes, rivers, etc.: it contains 11.188 percent hydrogen and 88.812 percent oxygen, by weight.

In an aqueous solution of magnesium bromide, the solute is magnesium bromide and the solvent is water.

The solute in an aqueous solution of magnesium bromide is the solid material, in this case magnesium bromide, dissolved in a liquid, which is the solvent. In this case, the solvent is water. Water is an excellent solvent because of its ability to form hydrogen bonds with other molecules, which allows it to dissolve many different substances.

In addition, it is a polar molecule, meaning that one end of the molecule has a slightly positive charge while the other end has a slightly negative charge. This polarity allows water molecules to interact with molecules of other substances, including magnesium bromide, which is also a polar molecule, allowing it to dissolve in the water.

The interaction between the polar water molecules and the polar magnesium bromide molecules causes the magnesium bromide to break up into its component ions, forming a solution. The ions are then surrounded by water molecules, which keeps them in solution until the solution is evaporated.

Learn more about magnesium bromide here:

https://brainly.com/question/11050230

#SPJ1

Answer:

   A + B = AB is an example of a synthesis reaction

Explanation:

Enthalpy change, H, for this reaction per mole of X is thus equal to 0 J/mol.

The amount of heat that the calorimeter, q cal, gains may be calculated using the formula qcal = Ccalt, where t is the change in temperature that the mixture experiences.

The equation: can be used to compute the enthalpy change, H.             ΔH = q / n

The heat absorbed by the water can be calculated using the equation:

q1 = m1 x c1 x ΔT1

m1 = 21.0 g = 0.0210 kg (since the density of water is 1.00 g/mL)

c1 = 4.18 J/(g⋅∘C)

ΔT1 = 25.0 ∘C - 13.5 ∘C = 11.5 ∘C

q1 = (0.0210 kg) x (4.18 J/(g⋅∘C)) x (11.5 ∘C) = 1.09 J

The heat absorbed by X can be calculated using the equation:

q2 = m2 x ΔHfus

where m2 is the mass of X and ΔHfus is the enthalpy of fusion of X.

m2 = 1.70 g = 0.00170 kg

ΔHfus = ΔH / n = ΔH / (m2/M)

where M is the molar mass of X.

We can rearrange this equation to solve for ΔH:  ΔH = q2 x (m2/M)

With this assumption, we can calculate ΔH as follows:

ΔH = q / n = (q1 + q2) / n

ΔH  = (1.09 J + q2) / (0.00170 kg / 77.0 g/mol)

ΔH  = (1.09 J + q2) / 0.0000221 mol

The fact that the heat absorbed by X is equal to the heat emitted by the solution can be used to solve for q2:  q2 = -q1

Therefore,  ΔH = (1.09 J - q1) / 0.0000221 mol

Substituting q1, we get:

ΔH = (1.09 J - 1.09 J) / 0.0000221 mol

ΔH = 0 J/mol

To know more about reaction visit:-

https://brainly.com/question/28984750

#SPJ9

There are therefore a total of 14 atoms: 2 Al, 3 C, & 9 O. In other words, 3.5 moles of calcium carbonate will contain 3.5 moles if carbon because each mole of calcium carbonate has one mole of carbon.

Hence, 40.078 divided by 100.086 everything multiplied by 100% represents the mass percentage for calcium in calcium carbonate. This yields a value of almost 40%. Carbon's mass percentage is calculated by taking 12.011 and dividing it by 100.086, then multiplying that result by 100% to get a number of roughly 12 percent.

The subscripts (2 and 3) in this formula indicate how so many atoms will make up one unit of the molecule. There are two aluminium atoms and three oxygen atoms, respectively, denoted by the numbers 2 and 3.

To know more about carbonate visit:
https://brainly.com/question/22530423

#SPJ1

Therefore, the amount of energy required to change 207 g of water ice at −10 ∘C to steam at 125 ∘C is 744.3618 kJ.

Similar to how kilometres measure distance, a kilojoule is a measurement used to measure energy. Some nations continue to use the Calories (Cal) system, which was once used to quantify food energy. These are the conversions: 1 kJ equals 0.2 Cal.

To figure out how much energy is needed to convert 207 g of water ice at -10°C to steam at 125°C, we must divide the process into several stages and figure out how much energy is needed for each one:

Heating ice from -10°C to 0°C:

q1 = m × Cm(ice) × ΔT

= 207 g ÷ 18.02 g/mol × 36.57 J/(mol⋅∘C) × (0 - (-10)) ∘C

= 41324.8 J

= 41.3248 kJ

Melting ice at 0°C:

q2 = n × ΔHfus

= m ÷ M × ΔHfus

= 207 g ÷ 18.02 g/mol × 6.01 kJ/mol

= 56.804 kJ

Heating water from 0°C to 100°C:

q3 = m × Cm(water) × ΔT

= 207 g ÷ 18.02 g/mol × 75.40 J/(mol⋅∘C) × (100 - 0) ∘C

= 174667.6 J

= 174.6676 kJ

Vaporizing water at 100°C:

q4 = n × ΔHvap

= m ÷ M × ΔHvap

= 207 g ÷ 18.02 g/mol × 40.67 kJ/mol

= 467.7326 kJ

Heating steam from 100°C to 125°C:

q5 = m × Cm(steam) × ΔT

= 207 g ÷ 18.02 g/mol × 36.04 J/(mol⋅∘C) × (125 - 100) ∘C

= 3832.8 J

= 3.8328 kJ

Total energy required:

qtotal = q1+q2+q3+q4+q5

= 41.3248 kJ + 56.804 kJ + 174.6676 kJ + 467.7326 kJ + 3.8328 kJ

= 744.3618 kJ.

To know more about energy visit:-

https://brainly.com/question/8630757

#SPJ9

To determine the number of HCl molecules in 4.91 L of HCl acid at 25°C, we can use the following steps:

[tex]\qquad\sf {Density = \dfrac{mass}{volume}}[/tex]

[tex]\qquad\sf{mass = density \times volume}[/tex]

[tex]\qquad\sf{mass = 1.096 \: g/mL \times 4.91\: L = 5.38\: kg}[/tex]

Convert the mass of HCl acid to the number of moles using its molar mass. The molar mass of HCl is 36.46 g/mol.

[tex]\sf{moles = \dfrac{mass}{ molar\: mass} = \dfrac{5.38\: kg}{36.46\: g/mol} = 147.6\: mol}[/tex]

Use Avogadro's number to convert the number of moles of HCl to the number of HCl molecules. Avogadro's number is [tex]6.02 \times 10^23[/tex] molecules/mol.

[tex]\sf number\: of\: HCl\: molecules = moles \times Avogadro's\: number[/tex]

[tex]\begin{aligned}\sf number\: of\: HCl\: molecules& =\sf 147.6 \: mol \times 6.02 \times 10^23\: molecules/mol \\& =\sf 8.88 \times 10^25\: molecules\end{aligned}[/tex]

Therefore, there are [tex]8.88 \times 10^25[/tex] HCl molecules in 4.91 L of HCl acid at 25°C, assuming the density of the acid is 1.096 g/mL.

[tex]\rule{200pt}{5pt}[/tex]

An example of solar energy being used in the U.S is in the heating of swimming pools, and powering of cabins in off grid regions.

14. Using hydrogen as a fuel source involves using it as a primary energy carrier to power vehicles or generate electricity. It can be combined with oxygen to create water, producing energy in the process. The process of using hydrogen as a fuel source is known as hydrogen fuel cell technology, which involves the conversion of chemical energy into electrical energy.

15. Hydrogen is the most abundant element in the universe but is rarely found in its pure form on Earth. It is usually found in combination with other elements such as oxygen in water, carbon in hydrocarbons, and nitrogen in ammonia. Hydrogen can be extracted from water, natural gas, coal, and biomass through various methods such as steam-methane reforming, electrolysis, and biomass gasification.

16. Advantages of using hydrogen as a fuel source include:

Disadvantages of using hydrogen as a fuel source include:

17. A fuel cell is an electrochemical device that converts chemical energy into electrical energy through a chemical reaction between hydrogen and oxygen. It consists of an anode, a cathode, and an electrolyte, with the hydrogen fuel entering the anode and the oxygen entering the cathode. The hydrogen molecules are split into protons and electrons, with the protons passing through the electrolyte and the electrons flowing through an external circuit, generating electricity. The oxygen combines with the protons and electrons at the cathode, producing water as the only byproduct.

18. Solar energy is a form of renewable energy that is derived from the sun's radiation. It is harnessed through various technologies such as photovoltaics, solar thermal systems, and concentrated solar power to generate electricity, heat water, and power homes and businesses.

19. A solar cell is a semiconductor device that converts sunlight directly into electricity through the photovoltaic effect. It is made of a thin layer of a semiconductor material such as silicon that is treated with impurities to create a p-n junction. When sunlight strikes the cell, it creates an electric field that separates the positively charged holes and negatively charged electrons, generating an electric current.

20. Advantages of using solar energy include:

Disadvantages of using solar energy include:

21. An example of solar energy being used in the U.S is in the heating of swimming pools, and powering of cabins in off grid regions.

Well, us human being rely on [tex]o_{2}[/tex] (oxygen). We human beings breathe this in every day because we need it to survive. This is a good example because it explains how humans don't see [tex]o_{2}[/tex] but use it every day.

Answer:

The key difference between aluminum and magnesium is that the aluminum is a corrosion resistant metal whereas magnesium is not. Magnesium and aluminum are two chemical elements that we can categorize as metals in the periodic table. Both are naturally occurring metals in different mineral forms.

Explanation:

The emission spectrum of copper can be seen from the spectrum C

An emission spectrum is the pattern of wavelengths of electromagnetic radiation emitted by a substance when it is excited by heat, electricity, or some other energy source. Each element, molecule, or compound has a unique emission spectrum, which can be used to identify it or to study its physical and chemical properties.

The emission spectrum is produced when electrons in the atoms or molecules are excited to higher energy levels, and then return to their ground state by releasing energy in the form of photons. The energy of each photon corresponds to a specific wavelength, and the collective emission of all the photons produces a characteristic pattern of bright lines or bands in the electromagnetic spectrum.

Learn more about emission spectrum:https://brainly.com/question/27268130

#SPJ1

Answer:

1. Atoms

Explanation:

The products and reactants of a chemical reaction are usually related in terms of their atoms and molecules. During a chemical reaction, atoms are rearranged to form new molecules, and these new molecules are the products of the reaction. However, the atoms themselves are not created or destroyed in the process.

For example, if we consider the combustion of methane (CH4) with oxygen (O2) to produce carbon dioxide (CO2) and water (H2O), the reactants (methane and oxygen) and the products (carbon dioxide and water) are all made up of the same types of atoms (carbon, hydrogen, and oxygen), but they are rearranged in different ways. The chemical properties of the reactants and products may differ, but they are still related in terms of their atomic and molecular composition.

It's difficult though to say which is more likely between atoms and molecules because they are both essential components of chemical reactions. In a chemical reaction, atoms combine to form molecules or break apart from molecules to form new molecules. Therefore, both atoms and molecules are important in a chemical reaction.

However, if we had to choose one that is more likely to be common between the reactants and products, it would probably be atoms. This is because in most chemical reactions, the atoms involved in the reactants are rearranged to form the products. The chemical reaction simply involves the rearrangement of the atoms, but the atoms themselves are not created or destroyed

On the other hand, molecules may change significantly during a chemical reaction, as they are made up of specific arrangements of atoms. The chemical properties of the reactants and products may also differ because of changes in the molecular structure. Therefore, while molecules are still an essential part of chemical reactions, it is more likely that atoms will be common between the reactants and products.

H+ (aq) + OH- (aq) → H2O (l)

According to the kinetic molecular theory, gases are described by the following statement:

This statement highlights that gases are made up of particles that are in constant motion, moving in straight lines until they collide with another particle or the walls of the container.

The motion of gas particles is random, and their energy increases as the temperature of the gas increases. The kinetic molecular theory also suggests that the particles in a gas are far apart from each other and do not attract or repel each other, except during collisions.

Additionally, the kinetic molecular theory states that the pressure of a gas is caused by the collisions of gas particles with the walls of the container. The higher the concentration of gas particles or the faster they are moving, the greater the pressure of the gas.

Learn more about kinetic molecular theory at:

https://brainly.com/question/15451798

#SPJ1

The order in which the ions would be precipitated is; Carbonate > Bromide > Iodide > Oxalate

Precipitation of ions refers to the process by which two aqueous solutions containing dissolved ionic compounds are mixed, resulting in the formation of an insoluble ionic compound that falls out of solution as a solid precipitate.

This occurs when the cations and anions of the two compounds combine to form an insoluble compound, which is not soluble in water and falls out of solution as a solid. The precipitation of ions is commonly used in chemistry to isolate, identify, or quantify different types of ions in a solution.

Learn more about ion precipitation:https://brainly.com/question/13255585

#SPJ1

The three parts are:

This passage describes the role of enzymes in biological processes. Enzymes are protein molecules that act as catalysts, speeding up chemical reactions without being used up or changed in the process. They do this by binding to specific reactant molecules, called substrates, at a specific site on the enzyme molecule called the active site.

Only substrates that are shaped to fit the active site can bind to the enzyme. When the enzyme and substrate bind together, they form an enzyme-substrate complex, which helps to break bonds in the substrate molecules and form new bonds, resulting in the formation of products.

Therefore, The enzyme then releases the products and is free to bind with other substrates and repeat the process. The passage also notes that enzymes are important in cell processes that supply energy and that their activity can be affected by factors such as pH and temperature.

Read more about enzymes here:

https://brainly.com/question/14577353

#SPJ1

See text below



reactions in the body. Like all catalysts, enzymes

up by the chemical reaction. They can be used again. Also, most enzymes act in just one type of reaction. For example, the enzyme amylase is found in saliva. Amylase helps begin the process of food digestion in the mouth.

The figure below shows how an enzyme works. The reactants that bind to the enzyme are called substrates. The specific location where a substrate binds on an enzyme is called the active site. The substrate and active site are shaped to fit together exactly. Only substrates shaped to fit the active site will bind to the enzyme.

The bond between the enzyme and substrates creates the enzyme-substrate complex. This complex helps to break bonds in the reactants and form new bonds, changing the substrates into products. The enzyme then releases the products.

Enzymes are the chemical workers in cells. The actions of enzymes enable cell processes that supply energy. Factors such as pH and temperature affect enzyme activity.

Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.

Substrate

Active sites

Substrate Enzyme

Biology online biologygmh.com

Product

Enzyme-substrate complex

Product

Chap

Pi

4

Answer:

25.3%

Explanation:

Since

Ca has just 1 mole

Ca ×1 = 40.08

C has 4 moles

C×4 = 48.04

H has 6 moles

H×6 = 6.06

O has 4 moles

O×4 = 64

64+6.06+48.04+40.08=158 (approx.)

40.08÷158 ×100% = 25.3%

Answer:

C. Energy is absorbed.

Explanation:

In an endothermic reaction, energy is absorbed from the surroundings, resulting in an increase in the internal energy of the system. This means that the products of the reaction have a higher energy content than the reactants, and energy is stored in the chemical bonds of the products.

Therefore, option C, energy absorption, occurs in an endothermic reaction.

Answer: There are 102,000,000 liters in the container.