2. Atoms & Elements

Which of the following numerical expressions gives the number of moles in a sample containing mass m (in grams) of a substance with molar mass M (in g/mol)?

How many silver atoms are present in 3.75 moles of silver (Ag)?

How many molecules are present in 0.500 moles of H_2?

How many moles of hydrogen atoms are present in 2.0 moles of ammonia (NH_3)?

How many atoms are present in one mole of carbon?

How many moles are present in 25.5 g of silver (Ag)? (Molar mass of Ag = 107.9 g/mol)

How many moles of silver atoms are present in 1.8 × 10^{20} atoms of silver (Ag)?

Which of the following best describes Avogadro's number?

Which statement is true about 0.25 mole of O_2 and 0.25 mole of NH_3?

How many moles of NaCl are present in 0.500 L of a 1.5 M NaCl solution?

Which of the following best describes the relationship between the mole and concentration in a solution?

Which statement best describes a mole in chemistry?

For which of the following items is the mole an appropriate unit of measurement?

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