Molar Mass and Percent composition

a set of chemical symbols showing the elements present in a compound and their relative proportions and in some cases the structure of the compound.

• chemical formula

• chemical name

• chemical reaction

• chemical change

_________the percent by mass of each element in a compound.

• Formula mass

• Percent composition

• Molar Mass

• Molecula Mass

What is the molar mass of CO₂?

• 12 g/mol

• 16 g/mol

• 32 g/mol

• 44 g/mol

What is the molar mass of table salt (NaCl)?

• 116.886 g/mol
• 35.453 g/mol
• 22.990 g/mol
• 58.443 g/mol

What is the percent by mass of sodium in NaCl?

• 39%
• 61%
• 35%
• 65%

What are the units in molar mass?

• grams
• moles
• moles/gram
• grams/mole

The molar mass of an element is equal to its...

• Atomic mass
• Atomic number
• Oxidation number
• Valence electrons

What is the mass percentage of Carbon in Carbon dioxide (CO₂)?

• 27.27%

• 42.86%

• 72.73%

• 72.72%

Which of the following statements is NOT true?

• Molar mass is molecular mass
• Molar mass is the sum of the number of all atoms in one molecule
• Molar mass is the sum of the weight of all the atoms in the molecule
• You don't need atomic numbers when calculate molar mass

What is the molar mass of fluorine gas, F₂?

• 18.998 g/mol
• 38 g/mol
• 9 g/mol
• 18 g/mol