Unit 6 - Stoichiometry

Which has more molecules?

• 1 mole H₂O

• 1 mole CH₄

• 1 mole Cl₂

• They're are all the same.

5.11 x 10²³ atoms of lithium (Li) is equal to how many moles?

• 1.18 moles

• 0.351 moles

• 1.34 moles

• 0.849 moles

0.75 mole of copper (Cu) is equal to how many atoms?

• 8.03 x 10²³ atoms

• 6.02 x 10²³ atoms

• 4.51 x 10²³ atoms

• 3.11 x 10²³ atoms

What is the mass of one mole of potassium (K)?

• 19 grams

• 39.10 grams

• 30.97 grams

• 38 grams

Which conversion factor would you use to calculate correctly the mass of 2 moles of the element titanium?

• 47.86 g Ti / 1 mol Ti

• 1 mol Ti / 47.84 g Ti

• 47.84 mol / 1 g Ti

• 47.87 g Ti / 1 mol Ti

0.50 moles of carbon (C) is equal to how many grams?

• 6.0 grams

• 12.0 grams

• 8.0 grams

• 14.0 grams

36.0 g of beryllium (Be) contains how many moles?

• 0.25 mol

• 4.0 mol

• 45 mol

• 320 mol

How many atoms would be contained in 454 grams of iron (Fe)?

• 6.02 x 10²³ atoms

• 8.14 atoms

• 4.90 x 10²⁴ atoms

• 55.85 x 10²³ atoms

Find the mass in grams of 2.25 x 10²⁴ atoms of calcium (Ca).

• 40.0 grams

• 255.1 grams

• 150 grams

• 9.02 x 10²⁴ grams

Tags

NGSS.HS-PS1-7

What is the molar mass of AuCl₃?

• 96.00 g/mol

• 130.00 g/mol

• 232.51 g/mol

• 303.32 g/mol