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astra-53 [7]
3 years ago
15

Please help me with this chem question

Chemistry
1 answer:
lana [24]3 years ago
7 0

Answer:

D

Explanation:

A and C are physical changes, while B is a solution, only D is a chemical reaction.

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Most matter is made up of _____, rather than single _____.
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molecules, elements

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molecules are a mix of elements

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1 year ago
What are water and carbon dioxide converted into by the end of
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sugar and oxygen

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In photosynthesis, solar energy is harvested as chemical energy in a process that converts water and carbon dioxide to glucose. Oxygen is released as a byproduct.

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3 years ago
Water can be formed in the following reaction:
andreev551 [17]

Answer is: 10 moles of water will be produced.

Balanced chemical reaction of formation of water:

2H₂ + O₂ → 2H₂O.

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From balanced chemical reaction: n(H₂) : n(H₂O) = 2 : 2 (1 : 1).

n(H₂O) = n(H₂).

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3 years ago
6. (1 point) What is the correct formula for sodium sulfate? *
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6) Na2 SO4
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