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3 years ago

Energy Sources (6 points) A. Sort the types of energy into the "renewable" and "nonrenewable" columns. (1 point)

Chemistry

1 answer:

denpristay [2]3 years ago

7 0

Explanation:

(A) Renewable resources are defined as the resources that can be used again and again.

For example, wind, hydroelectric energy, geothermal etc.

On the other hand, resources which cannot be used again and again and which cannot be replaced by natural means are known as non-renewable resources.

For example, coal, petroleum etc are all non-renewable resources.

Therefore, given options are distinguished as follows.

Renewable energy : Wind, Hydroelectric, Geothermal, Biomass, and Solar.

Non-renewable energy : Coal, Petroleum, Natural gas.

(B) Fuels which decompose for a long period of time and which arise from old life forms are known as fossil fuels.

When fossil fuels burn in the presence of air that is, combustion of fossil fuels give carbon dioxide and water.

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When copper is bombarded with high-energy electrons, X rays are emitted. Calculate the energy (in joules) associated with the ph

Scrat [10]

Answer:

E = 12.92 × 10^(-16) J

Explanation:

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E = hc/λ

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3 years ago

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Zina [86]

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3 years ago

ki77a [65]

Answer:

4Na + O₂ → 2Na₂O

6.82g

Explanation:

The combustion of sodium involves combining the element with oxygen gas:

4Na + O₂ → 2Na₂O

We have been given 5g of Na.

The balanced reaction equation is given as shown above. This reaction is also a synthesis or combination reaction.

b. Maximum amount of product that can be obtained.

Sodium is the limiting reactant and it will determine the amount of product that can be formed.

To solve this, we find the number of moles of the given sodium.

Mass of given sodium = 5g

Molar mass of Na = 23g/mol

Number of moles of Na = $\frac{mass}{molar mass}$

Insert the parameters and solve;

Number of moles of Na = $\frac{5}{23}$ = 0.217moles

From the balanced reaction equation:

4 moles of Na will produce 2 moles of Na₂O

0.217 moles of Na will produce $\frac{0.217 x 2}{4}$ = 0.11mole of Na₂O

So;

Mass of Na₂O = number of moles x molar mass

Molar mass of Na₂O = 2(23) + 16 = 62g/mol

Mass of Na₂O = 0.11 x 62 = 6.82g

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3 years ago