Question

How many molecules are in 165 g of carbon dioxide? a) 6.774 × 1024 B) 2.258 × 1024 C)2.258 × 1025 D) 6.774 × 1024

Answer 1

The correct answer is B. 2.258 × 1024

Answer 2

Hi, the correct answer option is

B. 2.258×10^24 molecules of CO2

Step-by-step explanation

The molar mass of CO2 is 44 grams per mole

165 /44 grams per mole of CO2 =3.75 moles of CO2

But we know from Avogadro’s law that 1 mole of a substance=6.023×10^23 molecules

Thus 3.75 moles of CO2 = (6.023×10^23 molecules/mole)= 2.258×10^24 molecules of CO2

Hope this helps!