Moles

What is a mole?

• 6.022 x 10²³ particles of any substance

• A small burrowing animal

• A dark spot on your skin

• A spy

An element's molar mass can be found on what part of an element's entry on the periodic table?

• atomic number

• atomic mass

• group number

• it can't be found on the periodic table

Which of these elements has the highest molar mass?

• Hydrogen

• Iron

• Carbonate

• Cobalt

What is the molar mass of Mg₃N₂?

• 191.6 g/mol
• 76.64 g/mol
• 38.32 g/mol
• 100.95 g/mol

What is the molar mass of Al₂(SO₄)₃?

• 75.04 g

• 342.14 g 

• 75.04 mol

• 342.14 mol

What is the mass of 54.3x10⁴⁵molecules of BeO?

• 3.27x10⁷⁰ g
• 9.01 x10²²g
• 2.25 x10²⁴ g
• 1.31 x10⁶⁹g

Tags

NGSS.HS-PS1-7

What is the mass of 9.4x10²¹ of B₂(Cr₂O₇)₃?

• 6.41 x 10²²g

• 5.67x10²⁴ g

• 10.45 g

• 43.23 g

Tags

NGSS.HS-PS1-7

How many formula units are there in 12.7g of CaF₂?

• 9.79x10²²

• 1.76x10²³

• 6.14x10²²

• 0.16x10²⁴

Tags

NGSS.HS-PS1-7

How many formula units are present in 69.0g of SrO?

• 4.0x10²³

• 8.72x10²¹

• 71.78 x10²⁵

• 93.32x10²²

Tags

NGSS.HS-PS1-7

How many formula units are there in 5.9 g of NaCl?

• 6.07x10²⁴

• 9.79x10^-24

• 1.02x10²³