2. Atoms & Elements

How many molecules are present in 4 moles of ammonia (NH_3)?

What is the number of atoms in one mole of any element?

How many moles are present in 100.0 g of water (H_2O)?

How many formula units are present in 3.4 moles of NaOH?

How many moles of solute are present in 500 mL of a 1 M solution?

Which of the following samples of N_2 contains the greatest mass?

How many moles are present in 35 g of H_2O?

Which of the following statements about the mole concept is NOT correct?

How many moles of nitrogen atoms (N) are present in 0.245 g of dinitrogen monoxide (N_2O)?

How many moles are present in 15 grams of lithium (Li)? (Atomic mass of Li = 6.94 g/mol)

What mass of sulfur (S) contains exactly 4.7 × 10^{22} atoms of sulfur?

How many silicon atoms are present in 4 molecules of SiH_4?

Which of the following best describes the relationship between moles and particles in chemistry?

How many atoms of neon are present in 0.378 g of neon (Ne)?

How many moles are present in 199 grams of CCl_4?