Mole Concepts Test Review

Which of the following pairs does NOT show the correct representative particle?

• Fe, atom

• Pb(NO₃)₂, formula unit

• N₂O₄, molecule

• N₂, atom

• more than one of these

Tags

NGSS.HS-PS1-3

What is the gram formula mass of chromic sulfate, Cr₂(SO₄)₃?

• 200.0 g/mol

• 148.1 g/mol

• 344.2 g/mol

• 288.0 g/mol

• 392.2 g/mol

What is the mass in grams of 5.90 mol C₈H₁₈?

• 673

• 0.0512

• 19.4

• 389

• 3.55 x 10²⁴

What is the number of moles in 432 g Ba(NO₃)₂?

• 3.25

• 0.605

• 0.237

• 1.65

• 113,000

How many atoms are there in 0.075 moles of titanium?

• 1.2 x 10^–25

• 6.4 x 10²

• 4.5 x 10²²

• 3.6

• 2.2 x 10²⁴

How many moles of tungsten atoms are there in 4.8 x 10²⁵ atoms of tungsten?

• 0.13

• 0.80

• 0.013

• 80

• 800

What is the volume (in liters at STP) of 2.50 mol of carbon monoxide?

• 3.1

• 9.0

• 56

• 70

• 560

What is the number of moles in 500 L of He gas at STP?

• 0.05

• 0.2

• 10,000

• 22

• 90

How many molecules of ethane gas, C₂H₆, are in 15 grams of the compound?

• 0.5

• 3 x 10²³

• 2

• 45

• 6.022 x 10²³

All of the following are equal to Avogadro’s number EXCEPT

• the number of atoms of gold in 1 mol Au

• the number of atoms of bromine in 1 mol Br₂

• the number of molecules of carbon monoxide in 1 mol CO

• the number of molecules of nitrogen in 1 mol N₂

• the number of formula units of sodium phosphate in 1 mol Na₃PO₄

Tags

NGSS.HS-PS1-5