Unit 9 Test practice

Calculate the molar mass of H₃PO₄

• 97.994 g/mol

• 94.970 g/mol

• 101.018 g/mol

• 95.978 g.mol

Calculate the molar mass of carbon tetrachloride

• 153.823 g/mol

• 47.464 g/mol

• 82.917 g/mol

• 118.370 g.mol

Determine the number of moles present in 54.3 grams of CO₂

• 1.23 mol

• 0.810 mol

• 1.23 g

• 0.810 g

Determine the number of atoms present in 4.00 mol of Al.

• 2.41 x 10²⁴ atoms

• 108 atoms

• 2.41 atoms

• 6.02 x 10²³ atoms

Convert 3.01 x 10²³ atoms Al  to grams

• 13.5 g

• 1.23 g

• 27.0 g

• 0.456 g

How many grams are in 2.20 mols of iron (II) nitride?

• 430. 430. g

• 9.33 g

• 196 g

• 43.3 g

Tags

NGSS.HS-PS1-7

How many atoms of hydrogen are in 1.55 moles?

• 9.33 x 10²³ atoms

• 4.76 x 10²⁴ atoms

• 6.02 x 10 ²³ atoms

• 2.57 x 10²⁴ atoms

How many atoms are there in a 95.0 g sample of Carbon?

• 4.76 x 10²⁴ atoms

• 476 atoms

• 5.72 x 10²⁵ atoms

• 1.15 atoms

How many mols are in 87.1g of N₂O₃?

• 1.15 mol

• 0.39 mol

• 2.90 mol

• 87.1 mol

Tags

NGSS.HS-PS1-7

What is the mass of 5.92 x 10²³ molecules of carbon dioxide?

• 43.3 g

• 27.5 g

• 44.0 g

• 59.2 g

Tags

NGSS.HS-PS1-7