Masses of Molecules and Ions

Which element has the symbol 'Na'?

• Sodium

• Chlorine

• Potassium

• Calcium

Fill in the blank: Sodium chloride (NaCl) forms a giant structure with 1 sodium ion for every ____ ion.

• Chlorine

• Hydrogen

• Oxygen

• Nitrogen

What is the formula for magnesium nitrate?

• Mg(NO3)2

• NaCl

• H2O

• NH3

What is the A_r value for potassium?

• 23

• 24

• 39

• 40

What is the molecular mass of H2?

• 1.01 amu

• 2.02 amu

• 3.03 amu

• 4.04 amu

Calculate the molecular mass of CO2.

• 44.01 amu

• 32.00 amu

• 28.02 amu

• 18.02 amu

Fill in the blank: The molecular mass of H2O is ____. A) 16.00 amu B) 18.02 amu C) 20.00 amu D) 22.02 amu.

• 16.00 amu

• 18.02 amu

• 20.00 amu

• 22.02 amu

What is the atomic mass of Oxygen (O) used in the calculation?

• 14.00

• 15.00

• 16.00

• 17.00

Calculate the molecular mass of C6H12O6 using the given atomic masses.

• 180.18 amu

• 150.13 amu

• 160.16 amu

• 170.17 amu

What is the atomic mass of Carbon (C) used in the calculation?

• 11.01

• 12.01

• 13.01

• 14.01