2. Atoms & Elements

How many sodium atoms are present in 0.2310 g of sodium (Na)?

How many grams of glucose (C6H12O6) are present in 3.55 moles of glucose?

How many moles are present in 3.01 × 10^{22} atoms of magnesium (Mg)?

1 mole of which of the following substances contains the largest number of atoms?

How many moles are present in 8.50 × 10^{24} molecules of sodium sulfate (Na_2SO_4)?

How many grams are present in a sample of calcium (Ca) that contains 2.71 × 10^{20} atoms?

A 30. gram sample of neon (Ne) is given. What is the total number of atoms present in this sample?

In chemistry, what does a mole represent a count of?

How many molecules are present in 48.0 grams of NaOH?

How many molecules are present in 2.50 moles of H_2O?

How many hydrogen atoms are present in 4 molecules of H_2O?

If a sample of water contains 12 × 10^{23} oxygen atoms, how many moles of water molecules are present in the sample?

In the context of the mole concept, which statement best describes the role of baking soda (NaHCO_3) in mole calculations?

Magnesium and iron are metallic elements. How does a mole of magnesium compare with a mole of iron?

How many moles of cyclohexanone (molar mass = 98 g/mol) are present in a sample containing 147 g of cyclohexanone?