Question

How many moles of methane gas are present in 425 L of the gas? Round answer to 3 significant figures.

Answer 1

No. of moles of methane = 18.9 mol

Step-by-step explanation:

No. of moles = Volume of gas / Volume of gas (at STP)

Volume of gas at STP (Standard Temperature and Pressure) = 22.4L

N = 425 / 22.4

N = 18.973

∴No. of moles of methane = 18.9 mol