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Fofino [41]
3 years ago
12

Which fossil fuel is mainly used for heating and cooking?

Chemistry
2 answers:
hichkok12 [17]3 years ago
5 0

Answer: D. natural gas

Explanation:

Fossil fuels are the source of energy that are excavated from the deep layers of the earth crust. They are produced after year long microbial activity over the decayed plant and animal matter. Natural gas is the fossil fuel which is a naturally occurring natural gas which primarily consists of methane, but also contains alkanes, carbon dioxide, hydrogen sulfide, and helium.

It is the most common type of fossil fuel used for heating and cooking purposes. As it is cheapest in price as compared to other fuels and emits less amount of gaseous waste after combustion. Therefore, does not create pollution in house when used for heating and cooking.

Anna [14]3 years ago
4 0

I would say C. petroleum


A is wrong

B is impractical for "mainly used"

D thats too expensive

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Explanation:

I think 1) acidic solution

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8 0
3 years ago
How many moles of oxygen atoms are in 7.9E-1 moles of CO_2
Ilya [14]

Answer:

The number of moles of O atom in (7.9\times10^{-1}) mol of CO_{2} = 1.6

Explanation:

1 molecule of CO_{2} contains 2 atoms of O

So, (6.023\times 10^{23}) molecules of  CO_{2} contains (2\times6.023\times10^{23}) atoms of O.

We know that 1 mol of an atom/molecule/ion represents 6.023\times10^{23} numbers of atoms/molecules/ions respectively.

So, (6.023\times 10^{23}) molecules of  CO_{2} is equal to 1 mol of CO_{2}.

(2\times6.023\times10^{23}) atoms of O is equal to 2 moles of O atom.

Hence, 1 mol of CO_{2} contains 2 moles of O atom.

Therefore, (7.9\times10^{-1}) mol of CO_{2} contains (2\times7.9\times10^{-1}) moles of O atom or 1.6 moles of O atom.

3 0
3 years ago
If you start with 0.020 g of Mg, how many moles of H2 will you make if the reaction is complete?
irina [24]

If one starts with 0.020 g of Mg, 0.0008 moles of H2 would be made if the reaction is complete.

Going by the balanced equation of reaction in the image, 1 mole of Mg will produce 1 mole of H2 in a complete reaction.

If 0.020 g of Mg is started with:

mole of Mg = mass/molar mass

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Since the mole of Mg to H2 is 1:1, thus, 0.0008 moles of H2 will also be made from the reaction.

More on stoichiometry can be found here: brainly.com/question/9743981

6 0
2 years ago
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4 0
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8 0
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