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alukav5142 [94]
3 years ago
5

A color change happens during an experiment mixing two liquids. Is this a physical change or chemical change?

Chemistry
1 answer:
iris [78.8K]3 years ago
8 0
The color change would only effect the appearance of the substance, so it would be a physical change. 

Answer: physical change
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3 years ago
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2.8 x 10²³ molecules H₂O

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First, you will need the balanced chemical equation for the formation of water:

2H₂ + O₂ -> 2H₂O

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8.5 g H₂O x (1 mol H₂O/18.01528 g H₂O) x (6.02 x 10²³ molecules H₂O/1 mol H₂O) = 2.8404 x 10²³ molecules H₂O

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Now, to find the molecules of water, we can begin with the same stoichiometric equation, but before we convert to molecules, we will have to convert moles of water to moles of oxygen. This is where we will use the mole ratio of water to oxygen we got from the balanced chemical equation earlier. 2H₂O:1O₂

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Rounded to 2 significant digits: 1.4 x 10²³ molecules O₂

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need more info

Explanation:

i think so we need more info

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