Question

Calculating and using the molar mass of heterodiatomic The chemical formula for lithium fluoride is LiF A chemist measured the amount of lithium fluoride produced during an experiment. She finds that 317. g of lithium fluoride is produced. Calculate the number of moles of lithium fluoride produced. Round your answer to 3 significant digits. mol X Explanation Check 2019 McGrawH Terms of Education All Righes Reserved

Answer 1

If you want to calculate the number of moles of any compund, you should look for the molar mass. For LiF, its molar mass is 25,9 g/m So if 25,9 g are in one mol, the 317 in how many?. Then 12,2 is the number of moles of lithium fluoride produced.

Step-by-step explanation:

To get the molar mass of a compound, you should know the mass at the Periodic Table, for Li 7,00 , for F 18,9

Answer 2

`\boxed{\text{12.2 mol}}`

Step-by-step explanation:

`\text{M$_(r) $ of LiF} = 6.94 + 19.00 = 25.94\\\text{Moles} = \text{317 g } * \frac{\text{1 mol}}{\text{25.94 g}} = \text{12.2 mol}\\\\\text{The sample contains $\boxed{\textbf{12.2 mol}}$ of LiF}`