2. Atoms & Elements

How many atoms are present in one formula unit of the compound FeC5O5?

What is the molar mass of calcium carbonate (CaCO_3)?

What is the molar mass of CH3CH2OH (ethanol)? Provide your answer to two decimal places.

How many moles of C_3H_8 are present in 67.8 grams of C_3H_8?

How many grams are present in 4.5 moles of sodium fluoride (NaF)?

What is the mass in grams of 1.900 × 10^{24} iodine atoms? (Atomic mass of iodine = 126.90 g/mol)

What is the molar mass of sodium chloride (NaCl)?

What is the molar mass of aluminum (Al)?

What is the concentration of H^+ ions in a 0.010 M aqueous solution of sulfuric acid (H_2SO_4), assuming complete dissociation?

What is the mass in grams of 0.250 mol of the common antacid calcium carbonate (CaCO_3)?

How many nitrogen atoms are present in 15.0 grams of Pb(NO2)2?

What is the molar mass of water (H_2O) in a hydrate, expressed in g/mol?

What is the molar mass of chlorine gas (Cl_2)?

Which of the following steps is necessary to convert the mass of a sample of NaCl to the number of NaCl formula units present?

Which of the following is the correct molar mass (to two decimal places) of CH3OCH3 (dimethyl ether)?