2. Atoms & Elements

How many molecules are present in 2.30 grams of NH_3?

How many atoms are in 1 mole of silver ($Ag$)?

How many atoms are present in 3.50 moles of calcium (Ca)?

How many moles are present in 23.4 g of CaCl_2?

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?

How many iodine atoms are contained in $1$ mole of iodine atoms ($I$)?