calculating and using the molar mass of diatomic elements

Question

A chemist determines by measurements that 0.025 moles of fluorine gas participate in a chemical reaction. Calculate the mass of fluorine gas that participates. Round your answer to 2 significant digits.

Answer 1

To complete this problem, you would have to consider how to find the mass (in grams) of a substance when given moles. The formula I find helpful is moles=mass in grams/gram formula mass of the element. You may rearrange it to find the unknown value.

Given:

0.025 moles of fluorine gas

Gram formula mass of fluorine: 18.998 g/mol

Formula: (GFM)(moles)=grams

(18.998)(0.025)=0.47495 grams -> 0.48 grams of flourine

Hope this helps!