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mezya [45]
3 years ago
15

Which is the best example of potential energy

Chemistry
2 answers:
kvasek [131]3 years ago
6 0
A. holding a basketball in the air. 
Goshia [24]3 years ago
5 0

Answer: Option (A) is the correct answer.

Explanation:

Potential energy is defined as the energy obtained by an object due to its position or height.

Mathematically,         P.E. = mgh

where         m = mass of object

                   g = force of gravity

                   h = height of the object

Hence, we can conclude that out of the given options the best example of potential energy holding a basketball in the air.

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Why does warm air raise and cold air sink
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Warm is less heaver then cold air so warm air rise and cold air sinks
  
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3 years ago
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The three common states of matter are solid,liquid, and gas. how are they the same? how are they different?
Alina [70]
They are different beacause of the stages some you can see and not. And the cells move at different paces
8 0
4 years ago
Write the balanced chemical equations for the decomposition of solid calcium hydroxide into solid calcium (ii) oxide (lime) and
Lesechka [4]

Calcium oxide (CaO) or lime in solid form can be prepared from the decomposition of calcium hydroxide {Ca(OH)_{2} in to lime (CaO) and water (H_{2}O at high temperature. The reaction is an endothermic reaction. That is heat is absorbed in this reaction process. One mole of calcium hydroxide decomposed into one mole of calcium oxide and one mole of water. The balanced reaction can be shown as-CaCO_{3} (solid) → CaO (solid) + H_{2}O (liquid). The heat of the reaction is (+) 63.7 kJ/mole of CaO.

3 0
3 years ago
Can someone help me with my stoichiometry homework, it is due tonight.
AleksandrR [38]

Answer:

1. 1 mole of NaCl.

2. 1 mole of H₂O.

Explanation:

The balanced equation for the reaction is given below:

HCl + NaOH —> NaCl + H₂O

From the balanced equation above,

1 mole of HCl reacted with 1 mole of NaOH to produce 1 mole of NaCl and 1 mole of H₂O.

Next, we shall determine the limiting reactant. This can be obtained as follow:

From the balanced equation above, we can see that 1 mole of HCl reacted completely with 1 mole of NaOH. Therefore, HCl is the limiting reactant and NaOH is the excess reactant since we have 3.6 moles of NaOH.

1. Determination of the amount of NaCl produced from the reaction.

NOTE: The limiting reactant is used to determine the maximum amount produced since all of it is consumed in the reaction.

The limiting reactant is HCl and the amount of NaCl produced can be obtained as follow:

From the balanced equation above, we can see that 1 mole of HCl reacted to 1 mole of NaCl.

Thus, 1 mole of NaCl was produced.

2. Determination of the amount of H₂O produced from the reaction.

From the balanced equation above, it is evident that 1 mole of HCl reacted to produce 1 mole of H₂O.

Thus, 1 mole of H₂O was produced.

6 0
3 years ago
When a 7.40-mg sample of a compound containing carbon is burned completely, 18.6 mg of carbon dioxide is produced. What is the m
Sonja [21]

Answer:

68.6 % of the compound is carbon

Explanation:

Step 1: Data given

Mass of 7.40 mg = 0.0074 grams

Mass of carbon dioxide = 18.6 mg = 0.0186 grams

Molar mass CO2 = 44.01 g/mol

Step 2: Calculate moles CO2

Moles CO2 = mass CO2 / molar mass CO2

Moles CO2 = 0.0186 grams / 44.01 g/mol

Moles CO2 = 4.23*10^-4 moles

Step 3: Calculate moles C

For 1 mol CO2 we have 1 mol C

For 4.23*10^-4 moles CO2 we have 4.23*10^-4 moles C

Step 4: Calculate mass C

Mass C = 4.23*10^-4 moles * 12.01 g/mol

Mass C = 0.00508 grams

Step 5: calculate the mass percentage of carbon

% C= (0.00508 grams / 0.0074 grams ) * 100 %

% C = 68.6 %

68.6 % of the compound is carbon

7 0
4 years ago
Read 2 more answers
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