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Elanso [62]
3 years ago
8

The combining of hydrogen and oxygen gas into liquid water is an example of what kind of change?

Chemistry
1 answer:
KatRina [158]3 years ago
7 0
The combining of hydrogen and oxygen gas into liquid=H2O (water) is a compound or a molecule because it is 2 different elements combined with chemical bonds so its Chemical. B 
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What is the mass of NaCl required to make 140 grams of a 12% solution of NaCl in water?
Makovka662 [10]

Answer:

C. 17 grams.

Explanation:

∵ mass % = [mass of solute/mass of solution] x 100.

mass of solute (NaCl) = ??? g & mass of solution = 140.0 g.

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Answer with explanation
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The answer should be:

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