Molar Mass and percent composition practice_Unit 5

How to calculate molar mass of H₂O?

• 2(1)+16=18 g/mole

• 1/1+16=17 g/mole

• 2+32=34g/mole

• 1+2=3g/mole

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)?

• 116.88 g/mol

• 35.45 g/mol

• 22.99 g/mol

• 58.44 g/mol

What is the percent by mass of sodium in NaCl?

• 39%
• 61%
• 35%
• 65%

Tags

NGSS.HS-PS1-7

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

Find the molar mass of KCl

• 36 g/mol
• 78 g/mol
• 74 g/mol
• 178 g/mol

What is the molar mass of fluorine gas, F₂?

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

Calculate the molar mass of KOH.

• 28 g/mol

• 56 g/mol

• 84 g/mol

• 112 g/mol

The mass of one mole of substance is called...

• molecular mass
• mole constant
• molar mass
• atomic weight