When 15.0 g of fluorite (CaF_{2}) reacts with excess sulfuric acid, hydrogen fluoride gas is collected at 744 torr and 25.5°C. Solid calcium sulfate is the other product. What gas temperature is required to store the gas in an 8.63-L container at 875 torr?

We are asked to calculate for the **gas temperature is required** to store the gas in an 8.63-L container at 875 torr. We can calculate the required temperature of the gas using the **ideal gas equation**:

P = pressure, atm

V = volume, L

n = moles, mol

R = gas constant = 0.08206 (L·atm)/(mol·K)

T = temperature, K

In the ideal gas equation, the **amount of the gas in moles is needed** but the mass of CaF_{2} is given instead. We will have to calculate the moles of gas produced from the reaction first using the ** balanced reaction equation** and

**Write the balanced reaction equation:**