There are 1.25 moles of HF in 25 grams of hydrogen fluoride (HF).
HOW TO CALCULATE NUMBER OF MOLES:
- The number of moles of a substance can be calculated by dividing the mass of the substance by its molar mass. That is;
- no. of moles (mol) = mass (grams) ÷ molar mass (g/mol)
- According to this question, 25 grams of hydrogen fluoride (HF) were given, the number of moles can be calculated as follows:
Molar mass of HF = 1 + 19 = 20g/mol
no. of moles of HF = 25g ÷ 20g/mol
no. of moles = 1.25mol
- Therefore, there are 1.25 moles of HF in 25 grams of hydrogen fluoride (HF).
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