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Mrac [35]
3 years ago
10

Which of the following will result in a chemical change?

Chemistry
2 answers:
krok68 [10]3 years ago
8 0
It would be /A/....because a chemical change is somthing that cant NOT be brought back to its areganal proproties.coal will never be able to be bavk the way it was!!
Finger [1]3 years ago
5 0
A. Burning coal in a furnace. This is because when you burn coal, you cant get back to the reactants substance. Burning is a chemical change.
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Answer:

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Explanation:

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Please, What is the mass of oxygen in 72.0g of water? [ H= 1.0; O = 16.0]
yarga [219]
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So water is H2O so add up those molecular weights (H=1 and O=16)

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4 mol oxygen * 16 g/mol = 64g of oxygen

If we were doing hydrogen instead of oxygen there would be 8 mol hydrogen in 4 mol of water (2 H’s in every H2O molecule) and since we have 74 grams and oxygen is 64 grams, Hydrogen should be 8 grams. Math to check below

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