[lrn24gve]

I need help with a chemistry problem. I don't understand what to do.

'A compound of P and F was analyzed as follows: Heating 0.2324 g of the compound in a 378 cm^3 container turned all of it into gas, which had a pressure of 97.3 mmHg at 77.0 degrees Celsius. Then the gas was mixed with calcium chloride solution, which turned all of the F into 0.2631 g of calcium fluoride. Determine the molecular formula of the compound.'

Please explain what to do and why.

[Borek]

0.2324 g of the compound in a 378 cm^3 container turned all of it into gas, which had a pressure of 97.3 mmHg at 77.0 degrees Celsius

Use ideal gas law to calculate number of moles of the compound. Then combine it with mass of the sample to find out compound molar mass.

Then the gas was mixed with calcium chloride solution, which turned all of the F into 0.2631 g of calcium fluoride.

That gives information about number of moles of fluoride.