2. Atoms & Elements

The number of carbon atoms in exactly 12 g of pure carbon-12 is called a:

Given that the molar mass of RbF is 104.5 g/mol, how many moles of RbF are present in 57.0 grams of RbF?

How many molecules are present in 0.16 moles of carbon dioxide (CO_2)?

In what way are a mole and a dozen similar?

How many oxygen atoms are present in 52.06 g of carbon dioxide (CO_2)?

How many molecules are present in 0.25 mole of O_2?

How many moles of atoms are present in 2.00 g of 13C?

How many Mg^{2+} ions are present in 3.00 moles of MgCl_2?

One mole (mol) of glucose (molecular mass = 180 daltons) is:

Why do chemists use the mole as a counting unit?

What is the mass of 6.02 × 10^{23} atoms of carbon-12?

How many molecules of H_2O are present in 2.7 moles of water?

How many hydrogen atoms are present in 1.00 mole of NH_3?

How many carbon atoms are present in 1.00 mol of C_2H_6?

Which of the following contains exactly Avogadro's number of atoms?