How many atoms are present in 0.375 mol of palladium (Pd) atoms?

Calculate the mass of 25,000 molecules of nitrogen gas. (1 mole = 6.02 x 10²³ molecules)

How many moles of magnesium, mg, contain 9.31 × 10²² atoms of magnesium?

One atom of gold weighs 3.27 x 10^-13 ng. how many gold atoms are in 1.0 g of gold?

A rigid vessel contains 2.5 mol of H₂(g). How many grams of hydrogen are in the vessel?

One mole of copper(II) sulfate, CuSO₄, contains ________ moles of O.

What is the mass in grams of 0.375 mol of the element potassium, K?

(a) Write 'true' or 'false' for each statement. (a) A mole of horses contain a mole of horse legs.

A gold sample contains 4.65×1024 gold atoms. How many moles of gold does the sample contain?