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White raven [17]
3 years ago
12

Rubbing alcohol evaporates from your hand quickly, leaving a cooling effect on your skin. Because evaporation is an example of a

physical property, how do the molecules of gas compare to the molecules as a liquid?
Chemistry
1 answer:
Helga [31]3 years ago
6 0
They both evoporate and leave the cooling and refreshing feeling

hope this helped
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Which of the following is an indicator of a chemical reaction?
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How many water molecules does it contain? The density of water is 1.0 g/cm3.
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Complete question is;

A drop of water has a volume of approximately 7 × 10⁻² ml. How many water molecules does it contain? The density of water is 1.0 g/cm³.

This question will require us to first find the number of moles and then use avogadro's number to get the number of water molecules.

<em><u>Number of water molecules = 2.34 × 10²¹ molecules</u></em>

We are given;

Volume of water; V = 7 × 10⁻² ml

Density of water; ρ = 1 g/cm³ = 1 g/ml

Formula for mass is; m = ρV

m = 1 × 7 × 10⁻²

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from online calculation, molar mass of water = 18.01 g/mol

Number of moles(n) = mass/molar mass

Thus;

n = (7 × 10⁻²)/18.01

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from avogadro's number, we know that;

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Read more at; brainly.in/question/17990661

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2 years ago
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