2. Atoms & Elements

How many atoms are present in 13.2 moles of copper (Cu)?

If you have 149 grams of potassium chloride (KCl), how many moles of KCl do you have?

A pure silver ring contains 2.80 × 10^{22} silver atoms. How many moles of silver atoms does it contain?

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

How many moles are present in 5.62 g of water (H_2O)?

How many moles of nitrogen atoms (N) are present in 0.203 g of N_2O?

How many moles of NaNO3 are present in a 44.0 g sample?

What is the total number of moles of solute present in 0.50 L of a 3.0 M HCl solution?

How many atoms are present in a 40 g sample of carbon (atomic mass = 12.01 g/mol)?

How many atoms are present in 0.075 mol of titanium (Ti)?

How many atoms of hydrogen are present in 3.02 × 10^{22} molecules of NH_3?

If you have 33.6 L of neon gas at STP, how many moles of neon do you have?

How many atoms of Mg are present in 1.00 mole of magnesium?

How many moles are present in 10.0 mg of CO (carbon monoxide)?

How many moles are present in 8.5 × 10^{24} molecules of sodium sulfate (Na_2SO_4)?