Question

What is the total number of molecules in 11.2 liters of N2 gas at STP

Answer 1

3.01 x 10²³ molecules

Step-by-step explanation:

11.2 / 22.4 = 0.5 moles of N2

0.5 x (6.02 x 10²³) = 3.01 x 10²³ molecules

Answer 2

molar volume at STP = 22,4 L

1 mole -------------- 22,4 L
x mole -------------- 11,2 L

x = 11,2 / 22,4

x = 0,5 moles of N2

1 mole --------------- 6,02.10²³ molecules
0,5 moles ------------ y molecules

y = 0,5 . 6,02.10²³

y = 3,01.10²³ molecules