Question

use the molar voume to calculate each of the following at STP

A) the number of moles CO2 in 4.00 L of CO1 gas

B) the volume, in liters, occupied by 0.420 mole of He Gas

C) the volume, in liters, occupied by 6.40 g of O2 gas

D) the number of grams of Ne contained in 11.2 L of Ne gas

Provide formulas and go step by step please

Answer 1

A. 22.4 L of valume occupied by 1 mole of CO2

    4 L of volume occupied by = 1*4/22.4 = 0.1785 moles of CO2

B. 1 mole of He at STP occupied volume is 22.4L

   0.42 moles of He at STP occupied volume is = 22.4*0.42/1   = 9.408L

C. 1 mole of O2 at STP occupied volume is 22.4L

   32g of O2 at STP occupied volume is 22.4L

6.4g of O2 at STP occupied volume = 22.4*6.4/32   = 4.48L

D. 22.4L volume occupied 1 mole of Ne at STP

22.4 L volume occupied 20g of Ne at STP

11.2L volume occupied = 20*11.2/22.4   = 10g of Ne