2. Atoms & Elements

Which of the following samples contains the greatest number of atoms?

How many moles are present in 3.00 g of ethanol (C2H5OH)?

Which of the following is NOT equal to 1.00 mol of carbon-12?

How many molecules are present in 5.0 g of methyl alcohol (CH_3OH)? (Molar mass of CH_3OH = 32.0 g/mol)

How many atoms of hydrogen are present in 5.29 × 10^{21} molecules of ethanol (C_2H_5OH)?

How many atoms are present in 1.2 mol of carbon (C)?

How many atoms of iron (Fe) are present in a sample containing 7.38 mol Fe?

How many moles of sodium carbonate (Na2CO3) contain 1.773 × 10^{17} carbon atoms?

How many moles of nitrogen atoms (N) are present in 0.239 g of dinitrogen monoxide (N_2O)?

How many moles of hydrogen atoms are present in 120 g of C6H12O6?

Which statement best describes the relationship between a mole and Avogadro's number?

Which of the following samples contains the same number of atoms as 24 grams of carbon (C)?

How many moles of N_2O_4 are present in 76.3 g of N_2O_4, given that the molar mass of N_2O_4 is 92.02 g/mol?

How many particles are present in 2 moles of mercury (Hg)?

How many basketballs are present in 1 mole of basketballs?