Chemistry Assessment PRE

A student needs to use 0.575 moles of sodium chloride (NaCl) in an experiment. What mass of NaCl do they need?

• 101.64 g

• 59.02 g

• 33.6 g

• I’m not sure.

How many oxygen atoms are represented by the formula Pb(C₂O₄)₂

• 2

• 4

• 6

• 8

• I’m not sure.

What is the percent by mass of Ca in calcium chloride, CaCl₂

• 0.33

• 0.36

• 0.4

• 0.5

• I’m not sure.

Write the name for BF₃

• boron fluoride

• boron trifluoride

• triboron trifluoride

• boron fluoride tri

• I’m not sure.

Write the name for SiO₂

• silicon oxide

• silicon dioxide

• disilicon dioxide

• silicon oxide di

• I’m not sure.

Write the name for BaCl₂

• barium chloride

• barium dichloride

• dibarium dichloride

• barium chloride di

• I’m not sure.

Write the name for [Ra]⁺² 2[Cl]^-1

• radium chloride

• diradium chloride

• radium dichloride

• diradium dichloride

• I’m not sure.

Write the formula for dinitrogen octachloride

• 2N 8Cl

• N₂Cl₈

• 2NCl₈

• NCl

• I’m not sure.

Write the fomula for copper (II) sulfate

• Cu₂SO₄

• CuSO₄

• 2CuSO₄

• Cu(SO₄)₂

• I’m not sure.

A compound that is made of a metal and a nonmetal is called

• ionic
• covalent
• metallic
• I’m not sure.