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Water cannot be used as a fire extinguisher to put out –

A. Burning charcoal

B. Burning cloth

C. Burning oil

D. Burning wood​

Answer:

Mechanical weathering breaks rocks into smaller pieces without changing their composition. … Chemical weathering breaks down rocks by forming new minerals that are stable at the Earth's surface. Water, carbon dioxide, and oxygen are important agents of chemical weathering.

Explanation:

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Answer:

Mechanical weathering reduces the size of rocks without altering their content.

Chemical weathering damages rocks by creating new materials that are stable on earth's surface.

When the concentration of NADH increases while the concentration of NAD+ decreases, the electrochemical potential however will increase

Electrochemical potential can be defined as a measure of the difference between the average energy of the outermost electrons of the molecule or element in its two valence states.

NADP is a coenzyme and simply has it full meaning as Nicotinamide Adenine Dinucleotide Phosphate

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Answer:

answer is nitrogen dioxide

Answer:

turn it

Explanation:

Accurate information

Answer:

For The first one I think its the + if not try -
For the second one I believe its the first - sign

Explanation:

Answer:

Specific chemical sugar glucose

Explanation:

When we say “blood sugar,” we mean the specific chemical sugar glucose. Diabetes is all about glucose. There lots of sugars….table sugar is sucrose, malt sugar is maltose, milk sugar is lactose, and you’ve probably heard of fructose.

Blood sugar, or glucose, is the main sugar found in your blood. It comes from the food you eat, and is your body's main source of energy. Your blood carries glucose to all of your body's cells to use for energy.

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Answer:

Carbohydrates

Explanation:

first of all, I took a quiz and got it right but also Carbohydrates fuel the body and are broken down and made into glucose that can be absorbed into the bloodstream. so when absorbed into the bloodstream they travel in the blood to the body's cells where they are used for respiration.

Based on the standard heat of formation of aluminium oxide, the heat of the reaction of the decomposition of aluminium oxide is +3339.6 kJ

The heat or enthalpy of a reaction is the amount of heat evolved or absorbed when reactant molecules when reactants form products.

Considering the given reaction:

The heat of formation of aluminum oxide is -1669.8 kJ/mol.

The heat of the reaction of the decomposition of aluminium oxide is calculated as follows:

Heat of reaction = Heat of formation of products - Heat of formation of reactants

Heat of reaction = {3 × ΔHf°O2 (g) + 2 × ΔHf° Al(s)} - 2 × ΔHf° Al2O3 (s)

Since the standard enthalpy of formation,ΔHf°, of an element in its most stable form is equal to zero.

ΔH°rxn = (3 × 0 + 2 × 0) - 2 × -1669.8 kJ/

ΔH°rxn = +3339.6 kJ

Therefore, the heat of the reaction of the decomposition of aluminium oxide is +3339.6 kJ

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Percentage yield tells the percentage ratio of actual to theoretical yield. The theoretical yield of iron(III) sulfate is 26.52 g.

The theoretical yield is the product formation from the complete modification of the limiting reagent in a chemical reaction.

The balanced chemical reaction is shown as,

[tex]\rm 2FePO_{4} + 3Na_{2}SO_{4} \rightarrow Fe_{2}(SO_{4})_{3} + 2Na_{3}PO_{4}[/tex]

Moles of ferric phosphate is calculated  as:

[tex]\begin{aligned} \rm n &= \rm \dfrac{mass}{molar \; mass}\\\\&= \dfrac{20}{150.82}\\\\&= 0.1326\;\rm mol\end{aligned}[/tex]

From the reaction,

[tex]\dfrac{1 \;\rm mol \; Fe_{2}(SO_{4})_{3} }{2 \;\rm mol \; FePO_{4}}&= \dfrac{\rm X}{ 0.1326 \;\rm mol \; FePO_{4}}[/tex]

Solving for X:

[tex]\begin{aligned} \rm X &= (\dfrac{0.1326}{2}) \times 1 \rm \; mol\\\\&= 0.0663 \;\rm mol \;Fe_{2}(SO_{4})_{3}\end{aligned}[/tex]

Calculating mass from moles:

[tex]\begin{aligned}\rm mass &= \rm moles \times molar \rm \; mass\\\\&= 0.0663 \;\rm mol \times 399.88 \;\rm g/mol \\\\&= 26.51\;\rm g\end{aligned}[/tex]

Therefore, option A. 26.52 gm is the mass of iron(III) sulfate.

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Answer:

A) 26.52

Explanation:

Answer:

A. acidic

Explanation:

Answer:

The loss of crystalline structure of sucrose was reported at various temperatures, but decomposition, after >50 h of holding at 120 °C in a sealed pan.

Explanation:

As this condition is above the melting temperature of fructose (a possible first decomposition product), and there were water and impurities.

Answer: bulbs

Explanation: Daffodils and tulips are examples of bulbs.

Answer: Bulbs

Explanation: When you plant daffodils or tulips, you will see that the "seeds" are onion-like. Onions are bulbs, and so are daffodils and tulips.

Answer: A “rate” is a measure of the speed of any change that occurs within an interval of time In chemistry, reaction rate is expressed as the amount of reactant changing per unit time. Example: 3 moles/year, or 5 grams/second

Explanation: A “rate” is a measure of the speed of any change that occurs within an interval of time In chemistry, reaction rate is expressed as the amount of reactant changing per unit time. Example: 3 moles/year, or 5 grams/second

Answer:

Chemical reaction rates are usually expressed as the concentration of reactant consumed or, the concentration of product formed per unit time.

Explanation:

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Mass defect for oxygen-16 = 0. 13261 amu, in the kilograms the mass defect equals to 2.20 × 10⁻²⁸ kg.

Mass defect is the difference between the mass of of an whole atom and the combined mass of its individual particles present in that atom.

We know that, 1 amu = 1.6 × 10⁻²⁷ kg

Given that, mass defect for oxygen-16 = 0.13261 amu

To calculate this defect in terms of kilograms, we have to convert into kg unit as:

0.13261 amu = 0.13261 amu × 1.6 × 10⁻²⁷ kg/amu

0.13261 amu = 2.20 × 10⁻²⁸ kg

Hence option (2) is correct.

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The current required to plate out 2.96 g of nickel from the solution of Ni²⁺ in 27.12 minutes is 5.95 A

We'll begin by writing the balanced equation showing the number of faraday required to plate nickel. This is given below

Ni²⁺ + 2e —> Ni

Molar mass of Ni = 59 g/mol

Mass of Ni from the balanced equation = 1 × 59 = 59 g

Number of faraday = 2 F

1 faraday = 96500 C

2 faraday = 2 × 96500 = 193000 C

SUMMARY

From the balanced equation above,

59 g of Nickel was deposited by 193000 C of electricity

From the balanced equation above,

59 g of Nickel was deposited by 193000 C of electricity

Therefore,

2.96 g of Nickel will be deposited by = (2.96 × 193000) / 59 = 9682.71 C of electricity

I = Q / t

I = 9682.71 / 1627.2

I = 5.95 A

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The current required to plate out 2. 96 g of nickel from a solution of ni2 in 27. 12 minutes is 5.95 ampere.

Current is a charged particle moving through an electrical conductor.

The equation is [tex]\rm Ni^2^+ + 2e = Ni[/tex]

step 1: calculate the mass of Ni

Molar mass of Ni is 59 g/mol

59 × 1 = 59 g

Step2: calculate the number of Faraday

no. of Faraday is 2F

1 Faraday = 96500 C

then, 2 Faraday is equal to 2 × 96500 = 193000 C

Step 3: calculate the quantity of electricity

59 g of Nickel is deposited by, 193000 C of electricity

So, for 2.96 g of nickel

[tex]\dfrac{2. 96\;g \times 193000}{59} = 9682.71 \;C[/tex]

Step4: calculate the current:

Electricity Q = 9682.71 C

Time = [tex]27.12 \times 60 = 1627.2 \;s[/tex]

To find current

[tex]I = \dfrac{Q}{t} \\\\I = \dfrac{9682.71 }{1627.2}\\I = 5.95 A[/tex]

Thus, the current required is 5.95 ampere.

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Answer:

condenses

Explanation:

change or cause to change from a gas or vapor to a liquid.

Answer:

The answer is B which is 40

From the calculations and the data presented, the total volume in the flask is 100cm^3

A neutralization occurs between an acid and a base to yiled salt and water only.

The reaction equation here is; HCl + NaOH -----> NaCl + H2O. Now, the volume of HCl used is obtained from;

2 * 20 * 1/0.5 * 1 = 80 cm^3

Total volume in the flask =  80 cm^3 + 20cm3 = 100cm^3

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Answer:

125.6168064 is the answer

Larger differences in air pressure over a small area makes the wind blow faster and stronger.

Pressure is defined as the force applied on an object perpendicular to it's surface per unit area over which it is distributed.Gauge pressure is a pressure which is related with the ambient pressure.

There are various units by which pressure is expressed most of which are derived units which are obtained from unit of force divided by unit of area . The SI unit of pressure is pascal .

It is a scalar quantity which is related to the vector area element with a normal force acting on it.It is distributed over solid boundaries and across arbitary sections of fluid normal to the boundaries at every point.

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Answer:

To protect people and the environment.

Explanation:

In an ecosystem, the  goal of all environmental regulations is to protect people and the environment.

Ecosystem is defined as a system which consists of all living organisms and the physical components with which the living beings interact. The abiotic and biotic components are linked to each other through nutrient cycles and flow of energy.

Energy enters the system through the process of photosynthesis .Animals play an important role in transfer of energy as they feed on each other.As a result of this transfer of matter and energy takes place through the system .Living organisms also influence the quantity of biomass present.By decomposition of dead plants and animals by microbes nutrients are released back in to the soil.

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Answer:

Reflection

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The amount of the amino acid glycine that is found in Stan’s apparatus is more than that of murchison meteorite.

It should be noted that amino acid simply means organic compounds that contain both amino and carboxylate.

In this case, the amount of the amino acid glycine that is found in stan’s apparatus is more than that of murchison meteorite. This was depicted by the fraction of the three amino acids in the scenario.

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The actual amount of the amino acid glycine found in Stan’s apparatus is more than the amount of glycine in the Murchison meteorite.

Amino acids are the building blocks of proteins. The building blocks of life are amino acids and proteins.

In this example, the amount of glycine detected in Stan's equipment is more than that found in the Murchison meteorite. The fraction of the three amino acids in the scenario represented this.

Hence amount of amino acid is more in Stan's apparatus as compared to the Murchison meteorite.

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Answer:

%H20=

(14xH)+(7xO)______________________________ X 100(Mg) + (S) + (4 x O) + (14 x H) + (7 x O)Thus,(14 x 1.008) + (7x16.0)______________________________________ X 10024.31 + 32.06 + (4x16.0) + (14 x 1.008) + (7x16.0)=126.122_____________ X 100246.482= 0.512 x 100=51.2%There is 51.2% of water is Magnesium Sulphate-7-water.

Answer:

The air resistance is a special type of frictional force that acts upon objects as they travel through the air. The force of air resistance is often observed to oppose the motion of an object. This force will frequently be neglected due to its negligible magnitude (and due to the fact that it is mathematically difficult to predict its value). It is most noticeable for objects that travel at high speeds (e.g., a skydiver or a downhill skier) or for objects with large surface areas. Air resistance is a contact force.

The force of gravity is the force with which the earth, moon, or other massively large object attracts another object towards itself. By definition, this is the weight of the object. All objects upon earth experience a force of gravity that is directed "downward" towards the center of the earth. Gravitational force is considered to be a non-contact force because it is an attracting force which does not include contact between the objects to exert force

1) A. individual salt crystals

2) A. increases

3) A. increases

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A solution is defined as the homogeneous mixture which contain one or more solutes in a solvent. The factors which affect the solubility are temperature and pressure. Here individual salt crystals dissolve faster.

The maximum amount of solute which can dissolve in a given quantity of the solvent at a certain temperature is defined as the solubility. It is defined as the property exhibited by a material to dissolve in a given solvent.

The powdered salt found to dissolves faster in a solvent than the salt of larger size. The rate of dissolving is affected by the size of the solute. The faster the solute dissolves if its size is smaller. So the  individual salt crystals dissolves faster.

In most cases, generally the solubility found to decrease with the increase of temperature. When the temperature increases, the kinetic energy of the molecules increases and thereby decreases the intermolecular force of attraction. The increase in the process of agitation decreases the solubility.

1. The correct option is A

2. The correct option is B

3. The correct option is B

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The temperature change that indicates an increase in the average kinetic energy of the molecules in a sample is 255 K to 0°C.

Chemical reactions occur when particles of reactants react or collide with one another, hence, when particles collide faster, reaction also occurs faster.

One of the ways to make reactions occur faster i.e. increasing the average kinetic energy is by increasing the temperature.

The example that depicts an increase in temperature is 255K to 0°C, which is equivalent to 255K to 273K.

Therefore, the temperature change that indicates an increase in the average kinetic energy of the molecules in a sample is 255 K to 0°C.

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Answer:

15.055 X 1023 atoms

Explanation:

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