Question

If you have a compound that is KF, Postassium Fluoride with a molar mass of 58.096 g/mol, what is the percent by mass of Fluorine, F (molar mass of 18.998 g/mol) in the compound?

Answer 1

To find the percent by mass of Fluorine (F) in the compound KF, divide the molar mass of Fluorine by the molar mass of the entire compound and multiply by 100%.

Step-by-step explanation:

To calculate the percent by mass of Fluorine (F) in the compound KF, we need to compare the molar mass of Fluorine with the molar mass of the entire compound.

The molar mass of F is 18.998 g/mol, and the molar mass of KF is 58.096 g/mol.

To find the percent by mass, we can use the formula:

Percent by mass of F = (mass of F / mass of KF) x 100%

Plugging in the values:

Percent by mass of F = (18.998 g/mol / 58.096 g/mol) x 100%

= 32.7%

Therefore, the percent by mass of Fluorine in KF is approximately 32.7%.