2. Atoms & Elements

How many moles of HNO3 are required to prepare 5.0 liters of a 2.0 M solution of HNO3?

How many moles of copper (Cu) are present in 65.8 g of Cu? (Atomic mass of Cu = 63.5 g/mol)

Which sample contains a total of 6.0 × 10^{23} atoms?

How many molecules are present in 4.25 mol of CCl_4?

How many particles are present in one mole of a substance?

If you have 267 grams of aluminum chloride (AlCl_3), how many moles of AlCl_3 do you have?

How many moles of ions are present in 1 mole of NaCl dissolved in water?

How many moles are present in 4.00 g of ethanol (C2H5OH)?

How many atoms are present in 3.2 moles of Fe?

What is the number of moles of solute present in 650 mL of a 0.40 molar (M) solution?

A gold ring contains 1.806 × 10^{24} atoms of gold (Au). How many moles of gold are in the ring?

How many molecules are present in 2.5 mol of NaCl?

Which of the following represents the number of carbon atoms in exactly 12 g of pure carbon-12?

How many lithium atoms are present in a 12.0 g sample of lithium (Li)? (Atomic mass of Li = 6.94 g/mol)

How many carbon atoms are present in one mole of carbon?