Day 53 Formula Mass Exit Questions

Front

What is the formula mass of NH₃?

Back

17.0 g/mol.

Front

What is the percent by mass of hydrogen in NH₃?

Back

5.9%.

Front

What is the formula for calculating percent by mass?

Back

(mass of element in 1 mole of compound / molar mass of compound) x 100.

Front

What is the gram formula mass of (NH₄)₂SO₄?

Back

94.0 g.

Front

How do you calculate the gram formula mass of a compound?

Back

Add the atomic masses of all atoms in the formula.

Front

What is the atomic mass of nitrogen (N)?

Back

14.0 g/mol.

Front

What is the atomic mass of hydrogen (H)?

Back

1.0 g/mol.

Front

What is the atomic mass of sulfur (S)?

Back

32.1 g/mol.

Front

What is the atomic mass of oxygen (O)?

Back

16.0 g/mol.

Front

How many hydrogen atoms are in (NH₄)₂SO₄?

Back

8 hydrogen atoms.