1. Use the bond enthalpies to calculate the enthalpy change for this reaction. Is this reaction endothermic or exothermic?
Change in enthalpy =
Is this reaction exothermic or endothermic?
If bond formation in the products releases more heat energy than bond breaking in the reactants does.
Endothermic is either hot or cold.The reverse of exothermic processes is endothermic reactions. They take in thermal energy from the environment. This indicates that endothermic reactions cause their surroundings to get colder. This kind of response can be seen in the melting of ice.
What does it mean to be endothermic?An organism is said to be endothermic if it expends energy to control the internal temperature of its body. Ectothermic organisms, on the other hand, are those that control their body temperature through external environmental stimuli.
To know more about Endothermic visit:
https://brainly.com/question/23184814
#SPJ1
how the transformer work
Answer:
make me brainalist
Explanation:
The core of the transformer works to direct the path of the magnetic field between the primary and secondary coils to prevent wasted energy. Once the magnetic field reaches the secondary coil, it forces the electrons within it to move, creating an electric current via electromotive force (EMF).
An isotope of hydrogen, known as Tritium (hydrogen-3), has a half-life of 12 years. If a sample of tritium was prepared 60 years ago, what was its original mass if its current mass is 0.42 micrograms?
Options for answers:
a.) 1.7mg b.) 13.4mg c.) 6.7mg d.) 26.8mg e.) 3.4mg
The original mass of Tritium (hydrogen-3) was 13.4mg if its current mass is 0.42 micrograms.
The formula for radioactive decay is given by:
N = N0 x (1/2)^(t/T)
where,
N = final number of radioactive atoms
N0 = initial number of radioactive atoms
t = time elapsed
T = half-life of the radioactive substance
Let's substitute the given values into the formula:
0.42 μg = N0 x (1/2)^(60/12)
0.42 μg = N0 x (1/2)^5
0.42 μg = N0 x 1/32
N0 = 0.42 μg x 32
N0 = 13.44 μg
Therefore, the original mass of the tritium sample was 13.44 micrograms.
What is radioactive decay?
Radioactive decay is the process by which an unstable atomic nucleus loses energy by emitting ionizing radiation, such as alpha particles, beta particles, and gamma rays. This process can result in a change in the number of protons and/or neutrons in the nucleus, leading to the transformation of one element into another. The rate of decay is typically characterized by a half-life, which is the time required for half of the atoms in a sample to decay.
To know more about radioactive decay, visit:
https://brainly.com/question/1770619
#SPJ1
Esters, amines, and amides have many uses in medicine. Investigate one of the following drugs further: aspirin, Benadryl, or Tylenol and give its scientific name. What kind of functional groups does it contain?
Esters, amines, and amides have many uses in medicine, and so do carboxylic acids, such as aspirin. Aspirin is the drug that will be investigated further. Its scientific name is acetylsalicylic acid.
What kind of functional groups does Aspirin contain?Acetylsalicylic acid contains two functional groups: a carboxylic acid group (-COOH) and an ester group (-COO-CH₃). The carboxylic acid group is responsible for the acidic properties of aspirin and allows it to form salts with bases. The ester group is formed from the reaction between the carboxylic acid group of salicylic acid and acetic anhydride. This esterification reaction makes aspirin more soluble in organic solvents and less irritating to the stomach than salicylic acid.
Aspirin is a widely used medication that has anti-inflammatory, analgesic, and antipyretic properties. It works by inhibiting the production of prostaglandins, which are responsible for pain, inflammation, and fever. Aspirin is commonly used to treat headaches, fever, arthritis, and other inflammatory conditions. It is also used as a blood thinner to prevent heart attacks and strokes.
To know more about aspirin, visit:
https://brainly.com/question/23878261
#SPJ1
there are several elements whose atoms make more than one type of ion. Where in
the periodic table are these elements usually found?
Answer:
Explanation:
These are the transition metals. Groups 3-12 also know as the "d" block elements
What periodic trend does the atomic radius follow? A. It increases from left to right. B. It decreases from top to bottom. C. It stays the same across the table. D. It decreases from left to right.
Answer: D
Explanation:
It increases from right to left and down the periodic table. So your answ3er would be D. that it is decreasing from left to right.
Which term is defined as the ability to dissolve within a given solvent?
O solution
O solubility
O dissociating
O dissolving
20pts
Answer:
Solubility.
Explanation:
Solubility is the maximum concentration of a solute that can dissolve in a solvent at a given temperature. At the maximum concentration of solute, the solution is said to be saturated. The units of solubility can be provided in mol/L or g/L.
The balance the following equation. Show all of your work using the atom inventory method:
____Cr(MnO4)3 + ____Sr(OH)2 → ____Cr(OH)3 + ____Sr(MnO4)2
The balanced equation is:
Cr(MnO4)3 + 3Sr(OH)2 → 5Cr(OH)3 + 2Sr(MnO4)2
Balancing chemical equation.To balance this equation using the atom inventory method, we need to make sure that the number of each type of atom is the same on both sides of the equation.
Let's start by looking at the left-hand side of the equation:
Cr(MnO4)3 + Sr(OH)2
We can see that there is one chromium (Cr) atom, three manganese (Mn) atoms, and 12 oxygen (O) atoms on the left-hand side.
Now let's look at the right-hand side of the equation:
Cr(OH)3 + Sr(MnO4)2
Here we have one chromium (Cr) atom, two manganese (Mn) atoms, and 14 oxygen (O) atoms.
So, we need to balance the equation by adding coefficients (numbers in front of each chemical formula) to make sure the number of each type of atom is the same on both sides.
Let's start by balancing the chromium (Cr) atoms:
Cr(MnO4)3 + 3Sr(OH)2 → Cr(OH)3 + Sr(MnO4)2
Now we have one chromium atom on both sides.
Next, let's balance the manganese (Mn) atoms:
Cr(MnO4)3 + 3Sr(OH)2 → Cr(OH)3 + Sr(MnO4)2
We have three Mn atoms on the left-hand side, but only two on the right-hand side. To balance this, we need to add a coefficient of 2 in front of Sr(MnO4)2:
Cr(MnO4)3 + 3Sr(OH)2 → Cr(OH)3 + 2Sr(MnO4)2
Now we have two Mn atoms on both sides.
Finally, let's balance the oxygen (O) atoms:
Cr(MnO4)3 + 3Sr(OH)2 → Cr(OH)3 + 2Sr(MnO4)2
We have 12 O atoms on the left-hand side, but 20 O atoms on the right-hand side. To balance this, we need to add a coefficient of 5 in front of Cr(OH)3:
Cr(MnO4)3 + 3Sr(OH)2 → 5Cr(OH)3 + 2Sr(MnO4)2
Now we have 12 O atoms on both sides.
So the balanced equation is:
Cr(MnO4)3 + 3Sr(OH)2 → 5Cr(OH)3 + 2Sr(MnO4)2
Therefore, the coefficients are:
Cr(MnO4)3 + 3Sr(OH)2 → 5Cr(OH)3 + 2Sr(MnO4)2.
Learn more on balancing chemical equation here https://brainly.com/question/11904811
#SPJ1
A mixture of 0.2000 mol of CO2, 0.1000 mol of H2 and 0.1600 mol of H2O is placed in a 2.000 L vessel. The following equilibrium is established: CO2(g) + H2(g) ⇌ CO(g) + H2O(g) At equilibrium [H2O] = 0.0856 M. a. Calculate the equilibrium concentrations of CO2, H2 and CO. b. Calculate Kc for the reaction
The equilibrium concentrations of CO₂, H₂, and CO are 0.170 M, 0.084 M, and 0.016 M, respectively.
The equilibrium amounts, what are they?Making an equilibrium concentration calculation. A chemical reaction is said to be in a state of chemical equilibrium when both the reactants and the products are in a concentration that does not vary over time any longer.
The reaction's equilibrium constant formula is as follows:
Kc = ([CO][H₂O])/([CO₂][H₂])
We obtain the following by plugging in the equilibrium amounts from the ICE table:
Kc = ((x)(0.0856))/((0.20 - x)(0.10 - x))
b. In order to determine Kc, we must first determine x using the equilibrium formula and the specified equilibrium H₂O concentration:
Kc = ((x)(0.0856))/((0.20 - x)(0.10 - x)
Kc = (x(0.0856))/(0.02 - 0.3x + x - 0.01x)
Kc = (x(0.0856))/(0.02 - 0.21x)
Kc(0.02 - 0.21x) = 0.0856x
0.02Kc - 0.21Kcx = 0.0856x
0.21Kcx + 0.0856x = 0.02Kc
x(0.21Kc + 0.0856) = 0.02Kc
x = (0.02Kc)/(0.21Kc + 0.0856)
x = (0.02Kc)/(0.21Kc + 0.0856
After solving for the equilibrium concentrations of CO₂, H₂, and CO and substituting this equation for x back into the ICE table, we arrive at:
[CO₂] = 0.170 M
[H₂] = 0.084 M
[CO] = 0.016 M
To know more about equilibrium concentrations visit:-
https://brainly.com/question/13043707
#SPJ9
Carbon dioxide is an example of a greenhouse gas. Levels of carbon dioxide are increasing in the atmosphere. How are increasing levels of carbon dioxide affecting the atmosphere?
Select the two correct awnsers.
1.less water is evaporating from the oceans
2. Earthquakes and volcanic eruptions are becoming more frequent
3.patterns of rain and snow are changing
4.ice caps are becoming thicker and wider at the North Pole and South Pole
5.oceans waters are becoming warmer
Global warming brought on by rising carbon dioxide concentrations in the atmosphere is changing weather patterns and ocean temperatures. Changes in precipitation patterns are being brought on by the warming of the atmosphere.
Why does carbon dioxide serve as a representative greenhouse gas?Because it is one of the gases in the atmosphere that causes the greenhouse effect, which causes the Earth to warm, carbon dioxide is known as a greenhouse gas. Long-wavelength infrared radiation (heat) from the Earth is absorbed by carbon dioxide molecules in the atmosphere, and some of it is then radiated back downward.
What impact does an increase in atmospheric carbon dioxide have?Similarly, as air temperatures rise in response to rising carbon dioxide concentrations, more water vapor escapes into the atmosphere—which then amplifies greenhouse heating
To know more about greenhouse gas visit:-
brainly.com/question/4509458
#SPJ9
Help please
2.0 mol of Ca(OH)2 are mixed with 2.0 mol of HCl according to the following equation:
Ca(OH)2+2HCl=CaCl2+2H2O
a. Which chemical is in excess and which is limiting reactant?
b. What is the excess in grams?
c.Theoretically, how many moles of H2O will be produced?
Answer:
Explanation:
Limiting is HCl and excess is Ca(OH)2
excess is 296 grams Ca(OH)2
2 moles H2O will be formed
A block of aluminum occupies a volume of 28.0 mL and weighs 85.7g. What is its density?
Explanation:
The density of a substance is defined as its mass per unit volume. In this problem, we are given the volume and the mass of the aluminum block, so we can calculate its density as follows:
Density = Mass / Volume
Substituting the given values, we get:
Density = 85.7 g / 28.0 mL
Simplifying this expression, we get:
Density = 3.06 g/mL
Therefore, the density of the aluminum block is 3.06 g/mL
Answer:
3.06
Explanation:
I have included an overview of the topics you MUST include in your presentation.
Topic Outlines:
Biomass (10 points)
1. What does “Biomass” mean? How is Biomass being used today as a substitute for gasoline to run cars, trucks or buses?
2. What are some different ways Biomass is being used to heat homes today?
3. Name and explain 3 advantages/disadvantages in using Biomass compared to using Fossil Fuels or other alternative energies (specifically include environmental issues that can happen).
4. Explain the energy conversions when producing energy with Biomass. (Use the words: Potential Energy and Kinetic Energy).
Geothermal (10 point)
5. Where does geothermal energy come from?
6. How can geothermal energy be used to create electricity?
7. How can geothermal energy be used directly to heat homes and factories?
8. What is a “heat pump”?
9. Name and explain 3 advantages and disadvantages in using geothermal energy compared to using fossil fuels and other alternative energies. (Specifically include environmental issues that can happen).
Hydroelectric (10 points)
10. What is a good definition of hydroelectric power?
11. How does “moving water” get turned into electrical energy? Explain each part of the dam from the moving water to production of electricity.
12. Name and explain 3 advantages/disadvantages of getting electricity from hydroelectric power and how it compares to using fossil fuels or alternative energies. (specifically include environmental issues that can happen
13. Find one example in the U.S. that uses hydroelectric power to create electricity?
1. Its renewable nature,
2. Its potential to reduce greenhouse gas emissions and dependence on fossil fuels, and
3. Its ability to provide local sources of energy.
Disadvantages include:1. The high cost of production and transportation
2. The potential for deforestation and habitat loss
3. The release of pollutants and greenhouse gases during combustion
When producing energy with biomass, the potential energy stored in the organic matter is converted into kinetic energy by burning it or using other processes, such as gasification or pyrolysis, to release the energy. This kinetic energy can then be harnessed to generate electricity, heat, or fuel.Geothermal energy comes from the heat that is generated from the Earth's core and mantle.Geothermal energy can be used to create electricity by drilling wells into the Earth's crust and pumping hot water or steam to the surface, which can then drive turbines that generate electricity.Geothermal energy can be used directly to heat homes and factories by circulating hot water or steam through pipes or using geothermal heat pumps.A heat pump is a device that transfers heat from one place to another, such as from the ground to a building's heating system, by using a refrigerant to absorb and release heat.Advantages of using geothermal energy include:1. its low emissions and high efficiency,
2. its reliability and consistency,
3. its potential for use in remote areas.
Disadvantages include:1. the high upfront cost of installation,
2. the potential for depletion of geothermal reservoirs,
3. the risk of earthquakes and other geological hazards.
Hydroelectric power is a form of renewable energy that harnesses the power of moving water to generate electricity.Moving water is channeled through a dam, which drives turbines that spin generators to produce electricity. The water is then released back into the river or diverted to another body of water. The dam also serves to regulate the flow of water and prevent flooding.Advantages of using hydroelectric power include:its renewable nature, its potential for reliable and consistent power generation its ability to provide flood control and irrigation. Disadvantages include: the disruption of aquatic ecosystems, the potential for methane emissions from flooded land, the high upfront costs of building dams and other infrastructure.Hoover Dam, located on the Colorado River on the border between Arizona and Nevada, is a major example of a hydroelectric power plant in the U.SWhat is the history of hydroelectric power?The history of hydroelectric power dates back to the 19th century, with the development of water turbines and generators. The first hydroelectric power plant was built in Appleton, Wisconsin in 1882, by a man named H.J. Rogers.
However, the concept of using water to produce mechanical power had been around for centuries. In ancient times, waterwheels were used to power mills and other machinery, and in the Middle Ages, water power was used to operate various devices, such as water pumps, sawmills, and hammers.
Learn about hydroelectric power here https://brainly.com/question/786046
#SPJ1
A sample of gas is in a container with a movable piston. The volume in the container is originally 850 ML at a temperature of 467K and a pressure of 11 point 4K PA. What will the new temperature if the volume is expanded to 1125 in El with a new pressure of 99.7 K PA?
If the volume is increased to 1125 in El with a new pressure of 99.7 K PA, the new temperature will be around 808 K.
What transpires to the gas volume in a moveable piston cylinder?Once the piston's pressure has doubled, it goes downward until the gas's pressure and the piston pressure are equal. The gas has now lost half of its original volume. The volume of gas falls to one-fourth of its initial volume if the pressure on the piston is once more increased by a factor of two.
This issue can be resolved using the coupled gas law:
(P1V1) / T1 = (P2V2) / T2
Using the following conversions, we can first change the starting volume to litres and the original pressure to atmospheres (atm):
1 mL = 0.001 L
1 kPa = 0.00987 atm
V1 = 850 mL = 0.85 L
P1 = 11.4 kPa = 0.1126 atm
T1 = 467 K
The new volume and pressure can also be converted to litres and atmospheres:
V2 = 1125 mL = 1.125 L
P2 = 99.7 kPa = 0.984 atm
Now we can plug in the values and solve for T2:
(P1V1) / T1 = (P2V2) / T2
(0.1126 atm * 0.85 L) / 467 K = (0.984 atm * 1.125 L) / T2
T2 = (0.984 atm * 1.125 L * 467 K) / (0.1126 atm * 0.85 L)
T2 = 808 K
To know more about temperature visit:-
https://brainly.com/question/13294753
#SPJ1
Answer:
548 K
I hope this helps! Cheers ^^
Draw and label a picture of an ozone (O3) molecule (Hint start with an O2 then attach the third O). What type of bond is used to attach the 3rd oxygen atom to the ozone molecule? Explain in words how this bond forms.
The ozone molecule is composed of three atoms of the oxygen.
What is the structure of the ozone molecule?The ozone molecule (O3) is a triatomic molecule, meaning that it consists of three atoms. It is composed of three oxygen atoms, which are held together by covalent bonds.
The structure of the ozone molecule can be described as a bent or V-shaped molecule, with the three oxygen atoms arranged in a triangular fashion. The central oxygen atom is bonded to two other oxygen atoms, which are located above and below it, with bond angles of approximately 117 degrees.
Learn more about Ozone:https://brainly.com/question/14330630
#SPJ1
NEEDD HELP URGENTLY, NOBODY ELSE IS HELPING FFS
2.0 mol of Ca(OH)2 are mixed with 2.0 mol of HCl according to the following equation:
Ca(OH)2+2HCl=CaCl2+2H2O
a. Which chemical is in excess and which is limiting reactant?
b. What is the excess in grams?
c.Theoretically,how many moles of H20 will be produced?
Answer:
Explanation:
Limiting is HCl and excess is Ca(OH)2
excess is 296 grams Ca(OH)2
2 moles H2O will be formed
18. If we increase the temperature of the tank to 85° C, what will the new pressure be inside the tank?
The new pressure inside the tank would be approximately 101.8 kPa.
What is the relationship between temperature and pressure of a gas?
According to the ideal gas law, PV = nRT, where P is pressure, V is volume, n is the number of moles of gas, R is the gas constant, and T is temperature in Kelvin.Since the volume of the tank is constant, we can use the simplified form of the ideal gas law: P1/T1 = P2/T2, where P1 is the initial pressure, T1 is the initial temperature, P2 is the final pressure, and T2 is the final temperature.Converting 85° C to Kelvin (85 + 273.15 = 358.15 K), we can solve for P2: P2 = P1(T2/T1) = 101.3 kPa (358.15 K / 298.15 K) = 101.8 kPa.Increasing the temperature of the tank to 85° C would result in a new pressure inside the tank of approximately 101.8 kPa.
To know more about pressure follow this link:
https://brainly.com/question/24719118
#SPJ1
What is the ratio of ammonia if the chemical formula is
NH3
Explanation:
The chemical formula NH3 represents ammonia, a colorless gas that is widely used in various industrial and household applications. The formula indicates that one molecule of ammonia contains one nitrogen atom and three hydrogen atoms. Therefore, the ratio of nitrogen to hydrogen in ammonia is 1:3.
This means that for every one nitrogen atom in an ammonia molecule, there are three hydrogen atoms. Alternatively, we can say that the ratio of nitrogen atoms to hydrogen atoms in ammonia is 1:3.
How many milliliters of 9.89 M nitric acid solution should be used to prepare 3.50 L of 0.200 m HNO3? _____mL
Answer: Therefore, 70.7 mL of 9.89 M nitric acid solution should be used to prepare 3.50 L of 0.200 M HNO3.
Explanation:
To prepare 3.50 L of 0.200 M HNO3, we need to calculate the amount of HNO3 required and then determine the volume of 9.89 M nitric acid solution needed to prepare this amount of HNO3.
The amount of HNO3 required can be calculated using the formula:
amount of HNO3 (in moles) = volume of solution (in liters) x concentration of HNO3 (in moles per liter)
Substituting the given values:
amount of HNO3 = 3.50 L x 0.200 mol/L = 0.700 mol
Now, we can use the amount of HNO3 and the concentration of the nitric acid solution to calculate the volume of the nitric acid solution needed:
volume of nitric acid solution = amount of HNO3 (in moles) / concentration of nitric acid solution (in moles per liter)
Substituting the given values:
volume of nitric acid solution = 0.700 mol / 9.89 mol/L = 0.0707 L
Finally, we can convert the volume to milliliters:
volume of nitric acid solution = 0.0707 L x 1000 mL/L = 70.7 mL
Therefore, 70.7 mL of 9.89 M nitric acid solution should be used to prepare 3.50 L of 0.200 M HNO3.
Regenerate response
5. What measures how stressful exercise is on your body?
O A. Frequency
O B. Duration
O C. Volume
D. Intensity
Answer: D. Intensity
Explanation: Intensity is correct, because if you originally were working on a treadmill with a speed of 8, that is how much intensity your putting your body on. And if you put the speed for a treadmill at 11 to increase your exercise, you are increasing the speed you have to run, making it more intense. The more intense you make your workout or training, the more stressful exercise you are doing.
Hope this helps,
:)
discribe the difference bettween a food chain and a food web
The acid should be handled with great care why?
Acids have a strong tendency to corrode. Acid splashing on our flesh can result in severe burns and skin irritation. Therefore, when managing acids, we should exercise caution.
Should one manage strong acids with caution?Although acids and bases are frequently used in a wide range of industrial applications, it's essential to keep in mind that they are hazardous waste and should be handled carefully.
How should laboratory chemicals be handled?When working with concentrated acids or acid solutions, put on chemical splash goggles, chemical-resistant mittens, and a chemical-resistant apron. In a fume cover, work with concentrated acids. In accordance with your requirements, purchase diluted acid solutions. It is safer and simpler to manage, store, and use diluted solutions.
To know more about Acids visit:-
https://brainly.com/question/14072179
#SPJ9
If 8.50 g of element A reacts with 5.50 g of element B to form compound AB, what mass of AB is formed, if no A or B is left in excess?
Answer:
massR = massP
massA + massB = massAB
18g + 4g = 22g
Explanation:
Do you think these portions of the DNA get transcribed? (JUNK DNA) Why or why not?
Pls needed answer asap thnku smmm
Yes, a research in 2012 called the ENCODE project showed that about 75% of noncoding DNA or Junk DNA do get transcribed.
What is Junk DNA?The term "Junk DNA" is often used to refer to regions of the DNA that do not appear to code for functional genes, and their function or lack thereof is still a subject of active research and debate in the scientific community.
While it was once believed that these non-coding regions of DNA were "junk" and had no functional role, recent research has shown that some of these regions may have important regulatory functions, such as controlling gene expression or modulating chromosome structure.
In 2012, the ENCODE project determined that around three-quarters of the noncoding DNA in the human genome did undertake transcription and that almost half of the genome was accessible to proteins involved in genetic control such as transcription factors.
Some scientists, however, have questioned these findings, claiming that the accessibility of these genomic sequences to transcription factors does not necessarily imply that they have any biochemical significance or that transcription of the segments is favorable in terms of evolution.
Learn more about Junk DNA on:
https://brainly.com/question/11080028
#SPJ1
Need help with these calculations attached
A. The hydronium ion concentration, [H₃O⁺] of the solution is 4.57×10⁻⁸ M
B. The hydroxide ion concentration, [OH⁻] of the solution is 1.28×10⁻⁶ M
C. The hydroxide ion concentration, [OH⁻] of the solution is 1.80×10⁻¹¹ M
A. How do i determine the [H₃O⁺] of the solution?We can determine the [H₃O⁺] of the solution as shown below:
Concentration of hydroxide ion, [OH⁻] = 2.19×10⁻⁷MConcentration of hydronium, ion [H₃O⁺] = ?[H₃O⁺] × [OH⁻] = 10¯¹⁴
[H₃O⁺] × 2.19×10⁻⁷ = 10¯¹⁴
Divide both side by 2.19×10⁻⁷
[H₃O⁺] = 10¯¹⁴ / 2.19×10⁻⁷
[H₃O⁺] = 4.57×10⁻⁸ M
B. How do I determine of [OH⁻] of the solution?We can determine the [OH⁻] of the solution as shown below:
Concentration of hydronium, ion [H₃O⁺] = 7.81×10⁻⁹ MConcentration of hydroxide ion, [OH⁻] =?[H₃O⁺] × [OH⁻] = 10¯¹⁴
7.81×10⁻⁹ × [OH⁻] = 10¯¹⁴
Divide both side by 7.81×10⁻⁹
[OH⁻] = 10¯¹⁴ / 7.81×10⁻⁹
[OH⁻] = 1.28×10⁻⁶ M
C. How do I determine of [OH⁻] of the solution?We can determine the [OH⁻] of the solution as shown below:
Concentration of hydronium, ion [H₃O⁺] = 5.57×10⁻⁴ MConcentration of hydroxide ion, [OH⁻] =?[H₃O⁺] × [OH⁻] = 10¯¹⁴
5.57×10⁻⁴ × [OH⁻] = 10¯¹⁴
Divide both side by 5.57×10⁻⁴
[OH⁻] = 10¯¹⁴ / 5.57×10⁻⁴
[OH⁻] = 1.80×10⁻¹¹ M
Learn more about hydroxide ion concentration, [OH⁻]:
https://brainly.com/question/19800885
#SPJ1
dry ice is solid carbon dioxide. represent carbon dioxide in the following three ways, symbolic, particulate. and macroscopic
In symbol form, ice is depicted as CO2, in particle form, as molecules of CO2 packed closely together, and in macroscopical form, as a white, crystalline substance that sublimates from a solid to a gas.
How is dry ice defined as solid carbon dioxide?Because the gas when it solidifies resembles ice, ice ice is actually just carbon dioxide that has been solidified. Unlike regular ice, it instantly transforms into CO2 gas instead of melting into a liquid.
Why is dry ice a good illustration of sublimation?Solid carbon dioxide is sometimes referred to as "dry ice." That's because when something warms up and changes state, it doesn't just dissolve into a liquid. Instead, it skips the liquid step and transforms right into a gas.
To know more about molecules visit:-
https://brainly.com/question/19556990
#SPJ9
pls help!!
Which statement best describes the difference between speed and velocity?
A.
Velocity is plotted on the x-axis of a graph and speed is plotted on the y-axis.
B.
Velocity is related to position but speed is not.
C.
Velocity does not depend on time but speed does.
D.
Velocity has a specific direction but speed does not.
Answer:
option a
Velocity is plotted on the x-axis of a graph and speed is plotted on the y-axis.
Indicate the type of intermolecular forces hold liquid nitrogen (N2) together?
Answer:
Nitrogen liquefies at -195.8°C at room temperature.
At -182.95°C, the periodic table equivalent (oxygen) boils.
The boiling point of nitrogen is lower because there are fewer interactions between nitrogen molecules (N2).
The degree of electron fluctuation within a molecule affects interactions between non-polar molecules.
Van der Waals forces are the oldest sort of intermolecular contact, named after Dutch chemist Johannes van der Waals.
The Van der Waals forces, which include dipole-dipole and dispersion forces, are the weakest intermolecular forces.
If only 1600 grams of CO2 are produced, what is the percent error of this reaction?
Answer:
Explanation:
MTBE (C5H12O)
The Kp for the reaction A (g) ⇌ 2 B (g) is 0.0110. What is Kp for the reaction 2 B (g) ⇌ A (g)?