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vlabodo [156]
3 years ago
7

Why do foods and fuels have chemical potential energy?

Chemistry
2 answers:
Paul [167]3 years ago
7 0
Because food is a fuel for your body and it goes into our body and fuels us in order to make kinetic energy :)
Ainat [17]3 years ago
6 0
Fuels are burned to produce energy, and your body breaks down the food to produce nutrients for your body.
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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

                        = 0.020/24.3

                            = 0.0008 moles

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

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2 years ago
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