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FromTheMoon [43]
3 years ago
7

How many moles are in 25.3 g of a sample of potassium nitrate (KNO3)?

Chemistry
1 answer:
aksik [14]3 years ago
8 0

Answer:

25.3 g of KNO₃ contain 0.25 moles.

Explanation:

Given data:

Number of moles of KNO₃ = ?

Mass of KNO₃ = 25.3 g

Solution:

Formula:

Number of moles = mass/ molar mass

Molar mass of KNO₃:

KNO₃ = 39 + 14+ 16×3

KNO₃ = 101 g/mol

Now we will put the values in formula.

Number of moles = 25.3 g/ 101 g/mol

Number of moles = 0.25 mol

Thus, 25.3 g of KNO₃ contain 0.25 moles.

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Thus, we now have;

2H2 + O2 = 2H2O

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