TEST PRAC : MOLAR MASS,EMPIRICAL FORMULA, & PERCENT COMPOSITION

The number 6.02 x 10²³, which is the number of particles found in a mole. 

• molar mass
• mole
• Avogadro's number
• hydrate

What is the molar mass of copper?

• 12 g/mol
• 63.5 g/mol
• 58.9 g/mol
• 40.1 g/mol

The best definition for a mole provided below is

• The SI unit for the mass of something
• The SI unit for the amount of a substance
• The SI unit for the volume of something
• The SI unit for the area of a substance

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

• 116.9 g/mol
• 35.5 g/mol
• 23 g/mol
• 58.4 g/mol

What is the molar mass of fluorine gas?

• 19 g/mol
• 38 g/mol
• 9 g/mol
• 18 g/mol

What is the molar mass of B₂(CO₃)₃?

• 81.6 g/mol
• 94.8 g/mol
• 38.8 g/mol
• 201.6 g/mol

How many moles are present in 48 grams of Carbon? 

• 1 mol C
• 2 mol C
• 3 mol C
• 4 mol C

How many moles are in 3.01 x 10²² atoms of magnesium?

• 0.05 moles
• 1.81 x 10⁴⁶ moles
• 5.00 x 10²¹ moles
• 5.00 moles

The mass in grams of one mole of any pure substance.

• molecular formula
• hydrate
• mole
• molar mass

The percent by mass of each element in a compound.

• empirical formula
• mole
• percent composition
• molar mass