Mass Moles Molecules

In chemistry, a "mole" is:

• The mass of an atom
• a large number used to count particles
• based on the volume of a substance

How many atoms of iodine are in a mole of iodine?

• 53

• 63.55g

• 126.9

• 6.02 x 10²³

The number 6.02 x 10²³ is called...

• Obama's number
• Bohr's number
• Trump's number
• Avogadro's number

Tags

NGSS.HS-PS1-7

We use the periodic table to calculate the ____ of a substance

• mass

• molar mass

• moles

What is the molar mass of NaCl?

• 58.443g/mol

• 28g/mol

• 58.45g/mol

• 6.02 x 10²³

What is the mass of 0.75 moles of (NH₄)₃PO₄? (round to nearest hundredth & remember you have to find molar mass first)

• 101.82 g

• 121.75 g

• 111.82 g

• 111.75 g

How many particles would be in 8.4 moles of Octane (C₈H₁₈)?

• 5.06 x 10²³

• 5.06 x 10²⁴

• 5.0568

• 5.04 x 10²³

What is the definition of molar mass?

• number of grams per one mole of a substance
• whole number ratio that is a multiple of a chemical formula
• simplest, whole number ratio of a chemical formula
• 6.02 x 10^23 particles per one mole of a substance

Tags

NGSS.HS-PS1-7

What is the molar mass of AuCl₃? (don't round choose the full number)

• 107.886 g

• 303.330 g

• 232.526 g

• 303.326 g

Which would have more atoms?

• 1 mole of Li

• 1 mole of Au

• 1 mole of Si

• None, they all have the same amount 602,000,000,000,000,000,000,000