Review of Molar Mass/Moles/Scientific Notation and Sig Digs

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

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

What is the numerical value of Avogadro's number?

• 60.22x10²³
• 6.022x10²³
• 6.022x10³²
• 6.022x10²⁴

Tags

NGSS.HS-PS1-5

NGSS.HS-PS1-7

What is the mass of one mole of aluminum chloride?

• 62.43 g

• 116.40 g

• 133.33 g

• 97.88 g

What is the molar mass of phosphorus?

• 123.88 g

• 30.97 g

• 123.88 g/mol

• 30.97 g/mol

What is the mole used for? 

• To measure the amount of grams in a substance
• To measure the amount of atoms or molecules in a substance
• To measure the amount of energy in a substance
• To measure the amount of bonding in a substance 

What are the units for molar mass?

• grams
• amu
• grams/mole
• liters

The rule of scientific notation is to write all exponents with a base of ____.

• 50
• 5
• 100
• 10

How many moles of K₂SO₄ would have a mass of 50.0 g?

• 0.287 mol

• 287 mol

• 8.71 x 10³ mol

• 28.6 mol

How many grams are in 2.40 mol of sulfur?

• 9.35 x 10^-3 g

• 77.0 g

• 616 g

• 0.0748 g

How would you write 0.00051 in scientific notation?

• 51 x 10⁵

• 5.1 x 10^-4

• 5.1 x 10^-3

• 5.1 x 10⁴