2. Atoms & Elements

How many atoms are present in one molecule of Na2SO4?

What is the molar mass of Na_2SO_4?

Which of the following is the molar mass of chlorine gas (Cl_2)?

What is the molar mass of glucose (C6H12O6)?

Which of the following is the molar mass of Na_2CO_3 (sodium carbonate)?

What is the molar mass of sodium sulfate (Na2SO4)?

How many grams of krypton (Kr) are present in 2.50 moles of krypton?

Acetic acid has the chemical formula CH3COOH. How many grams of hydrogen (H) are present in 1.52 grams of acetic acid?

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)?