How many moles of CF4 are there in 171g of CF4?

Answer 1

The molar mass of CF₄ = 88.00 g/mole

Use dimensional analysis to convert 171 g CF₄ to moles:

171 g CF₄ x 1 mol CF₄ / 171 g CF₄ = 1.94 moles CF₄ (3 sig. figs.)

Answer 2

Hello, Michelle,

We need the molar mass of CF₄ (g/mole) to answer this question. Determine the molar mss by adding the atomic masses of each atom in CF₄. The total of one carbon and 3 fluorines is 88.01 amu. The beauty of the periodic table is that we can take this value of molecular atomc mass and replace amu with the unit grams/mole. That gives a molar mass of 88.01 grams/mole.

We have 171 grams, more than need for one mole. The exact amount is found by dividing the grams by the molar massL

171 g/(88.01 g/mole) = 1.94 moles

Bob