2. Atoms & Elements

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

How many molecules of ammonia (NH_3) are present in 10.4 moles of ammonia?

Which of the following is equal to one mole of calcium atoms?

What is the mass, in grams, of 3.09 × 10^{24} atoms of sulfur (atomic mass = 32.07 g/mol)?

What is the quantity, in moles, of KBr present in 60.0 mL of a 0.150 M KBr solution?

How many moles of carbon atoms are present in 1.22 moles of C6H12O6?

What is the quantity, in moles, of NaI present in 175.0 mL of a 0.230 M NaI solution?

Which of the following numerical expressions gives the number of atoms in 2.0 g of Ne (neon)?

How many atoms of H are present in 2.8 mol of N2H4?

How many moles of Na2CO3 are present in 0.40 L of a 3.5 M Na2CO3 solution?

How many atoms are present in one mole of Al_2O_3?

How many moles of iron are present in 3.15 × 10^{24} atoms of iron?

How many moles of oxygen gas (O_2) are present in 33.6 L of the gas at 1 atm and 0°C?

How many moles are present in 36 g of Be (beryllium)? (Atomic mass of Be = 9 g/mol)

In one mole of Sr(HCO3)2, how many moles of each element are present?