2. Atoms & Elements

How many grams are present in 5.00 mol of sodium chloride (NaCl)?

How many atoms of H are present in 31.30 grams of formaldehyde (CH2O)?

How many grams are in 11.9 moles of chromium (Cr)?

What is the mass, in grams, of 1.56 × 10^{21} atoms of magnesium (Mg)? (Atomic mass of Mg = 24.3 g/mol)

How many grams are present in 2.50 \(\times\) 10^{23} molecules of CaO?

How many grams of H_2O are present in 0.2 moles of H_2O, given that the molar mass of H_2O is 18.01 g/mol?

If you weigh out 0.205 g of salicylic acid (C7H6O3), what is the number of moles of salicylic acid present? (Molar mass of C7H6O3 = 138.12 g/mol)

What is the molar mass of sodium acetate trihydrate (NaC2H3O2·3H2O)?

What is the total mass in grams of 0.75 moles of SO_2?

Calculate the mass percent composition of carbon in C2H6O.

What is the molar mass of barium hydroxide, Ba(OH)_2?

Which of the following is the mass of one mole of carbon atoms?

What is the mass in grams of 5.47 × 10^19 molecules of CCl2F2 (molar mass = 120.91 g/mol)?

What is the molar mass of sulfur dioxide (SO2) in grams per mole?

What is the mass in grams of 5.40 moles of lithium (Li)?