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3 years ago

What term is used to describe the average kinetic energy of the molecules in a shape?

Chemistry

1 answer:

Bogdan [553]3 years ago

3 0

The term that is used to describe the average kinetic energy of the molecules in a shape is The kinetic theory.

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For the reaction Na2CO3+Ca(NO3)2⟶CaCO3+2NaNO3 how many grams of calcium carbonate, CaCO3, are produced from 79.3 g of sodium car

Alexus [3.1K]

Answer:

74.81 grams of calcium carbonate are produced from 79.3 g of sodium carbonate.

Explanation:

The balanced reaction is:

Na₂CO₃ + Ca(NO₃)₂ ⟶ CaCO₃ + 2 NaNO₃

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of each compound participate in the reaction:

Na₂CO₃: 1 mole
Ca(NO₃)₂: 1 mole
CaCO₃: 1 mole
NaNO₃: 2 mole

Being the molar mass of the compounds:

Na₂CO₃: 106 g/mole
Ca(NO₃)₂: 164 g/mole
CaCO₃: 100 g/mole
NaNO₃: 85 g/mole

then by stoichiometry the following quantities of mass participate in the reaction:

Na₂CO₃: 1 mole* 106 g/mole= 106 g
Ca(NO₃)₂: 1 mole* 164 g/mole= 164 g
CaCO₃: 1 mole* 100 g/mole= 100 g
NaNO₃: 2 mole* 85 g/mole= 170 g

You can apply the following rule of three: if by stoichiometry 106 grams of Na₂CO₃ produce 100 grams of CaCO₃, 79.3 grams of Na₂CO₃ produce how much mass of CaCO₃?

$mass of CaCO_{3} =\frac{79.3 grams of Na_{2} CO_{3} *100 grams of of CaCO_{3}}{106 grams of Na_{2} CO_{3}}$

mass of CaCO₃= 74.81 grams

<u><em>74.81 grams of calcium carbonate are produced from 79.3 g of sodium carbonate.</em></u>

6 0

3 years ago

How does energy in a nuclear reaction get created?

nasty-shy [4]

My answer -

A nuclear reactor produces and controls the release of energy from splitting the atoms of uranium.

Uranium-fuelled nuclear power is a clean and efficient way of boiling water to make steam which drives turbine generators. Except for the reactor itself, a nuclear power station works like most coal or gas-fired power stations.

P.S

Happy to help you have an AWESOME!!! day ^-^

7 0

2 years ago

Identify if the following are chemical or physical properties: "CP" for

mel-nik [20]

Answer:

1.pp

2.cp

3.pp

4.pp

5.pp

6.pp

8 0

3 years ago

How does a sample of water at 38 °C compare to a sample of water at 295 K?

Sidana [21]

Converting the temperature, 295 K from Kelvin to Celsius scale:

$295 K - 273 = 22^{0} C$

Water has a boiling point of $100^{0}C$ and a melting point of $0^{0} C$

When we compare water at two different temperatures, $22^{0}C and 38^{0}C$ we can say that water is in liquid form at both these temperatures as both of them are quite below the boiling temperature and above the melting temperature.

The temperature difference between water at the given two temperatures = $38^{0}C - 22^{0}C = 16^{0}C$

Water at $38^{0}C$ is at a higher temperature and so is warmer than water at a lower temperature of $22^{0}C (or 295 K)$ .

7 0

3 years ago

What is a non example of a galaxy?

Aleksandr [31]

Answer:

A non example of a galaxy is a star

7 0

3 years ago