Mole Concept and Molar Mass — Prelims Questions

What is the mass of $3.011 \times 10^{23}$ molecules of $ext{CO}_2$?

Which of the following contains the maximum number of atoms?

The volume occupied by 4.4 g of $\text{CO}_2$ at STP is:

How many oxygen atoms are present in 0.5 moles of $\text{CaCO}_3$?

What is the mass of one atom of oxygen?

A sample of $\text{MgCO}_3$ contains $3.011 \times 10^{23}$ ions of $\text{Mg}^{2+}$. What is the mass of the $\text{MgCO}_3$ sample?