1 g sample of tetrafluoromethane (CF) contains 90 g of carbon. What is the mass percent or nuorine in the compound?

The question is typed wrong.

The correct question should be

171 g sample of tetrafluoromethane (CF4) contains 90 g of carbon. What is the mass percent of fluorine in the compound?

Answer: -

47.37%

Explanation: -

Mass of Carbon = 90 g

Total mass of tetrafluoromethane = 171g

Mass of fluorine = Total mass of tetrafluoromethane - mass of carbon

= 171 g - 90 g

= 81 g

Mass percentage of Fluorine = (Mass of fluorine / Total mass of tetrafluoromethane) x 100

= (81 / 171) x 100

=47.37%