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Alexeev081 [22]
3 years ago
11

Anyone can help me please

Chemistry
1 answer:
Vlad1618 [11]3 years ago
5 0

x=3

Use the pythagorean theorem:

a^2 + b^2 = c^2

4^2 + x^2 = 5^2

16 + x^2 = 25

x^2 = 25-16

x^2 = 9

√x^2 = √9

x = 3

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We know we will need a balanced equation with masses, moles, and molar masses, so let’s gather all the information in one place.

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1. Use the molar ratio of NaF:HF to calculate the moles of NaF.

\text{Moles of NaF} = \text{0.589 mol HF} \times \frac{\text{2 mol NaF}}{\text{8 mol HF}} = \text{0.1472 mol NaF}

2. Use the molar mass of NaF to calculate the mass of NaF.

\text{Mass of NaF} = \text{0.1472 mol NaF} \times \frac{\text{41.99 g NaF}}{\text{1 mol NaF}} = \text{6.18 g NaF}

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