2. Atoms & Elements

How many moles of ions are present in 1 mole of NaCl dissolved in water?

How many moles are present in 4.00 g of ethanol (C2H5OH)?

How many atoms are present in 3.2 moles of Fe?

What is the number of moles of solute present in 650 mL of a 0.40 molar (M) solution?

A gold ring contains 1.806 × 10^{24} atoms of gold (Au). How many moles of gold are in the ring?

How many molecules are present in 2.5 mol of NaCl?

Which of the following represents the number of carbon atoms in exactly 12 g of pure carbon-12?

How many lithium atoms are present in a 12.0 g sample of lithium (Li)? (Atomic mass of Li = 6.94 g/mol)

How many carbon atoms are present in one mole of carbon?

We can be sure that a mole of table sugar (C12H22O11) and a mole of vitamin C (C6H8O6) are equal in their:

If we compare a mole of carbon atoms to a mole of oxygen atoms, which of the following statements is true?

Why do chemists use moles as a unit in chemical calculations?

If you have 1 mole of bicycles, and each bicycle has 2 tires, how many moles of tires do you have?

Why is the mole used as a unit to measure quantities such as atoms in chemistry?

The number of molecules of a chemical substance that is equal to its molecular weight in grams is called a(n):