I don’t know how to find the answer to how many moles of CO2 are in 210. Liters

Question

How many moles of CO2 are in 210. Liters at STP of the compound?

Answer 1

When you are given STP (standard temperature and pressure) remember that 1 mole of an ideal gas = 22.4 L.

When you have STP, you won't have to use PV = nRT if you remember this.

So is you have 210 L you simply find moles as follows:

210 L x 1 mol/22.4 L = 9.375 moles = 9.38 moles of CO₂

Answer 2

use the equation pv=nrt where n = number of moles and V = volume. STP means 273 K and 1 atm of pressure.

So 1*210 = n * 0.0821 * 273

so n = 9.37 Liters of gas