Chemistry Exam

What is the formula for copper(I) sulfate?

• Cu(SO₃)
• Cu(SO₄)
• Cu₂(SO₃)
• Cu₂(SO₄)

Tags

NGSS.HS-PS1-1

The chemical formula for an ionic compound of potassium and oxygen is

• KO.
• K₂O.
• K₂O₂.
• KO₂.

Tags

NGSS.HS-PS1-1

Name this compound: 
Ca(CO₃)

• Calcium carbon oxide
• Calcium (II) carbonate
• Calcium carbonate
• Carbonate (I) calcide

What is the name of the compound CoCl₂

• cobalt (II) chloride
• monocobalt dichloride
• Chlorous cobalt

Which of these combinations is an ionic compound made of?

• Metal and Metal
• Nonmetal and Nonmetal
• Metal and Nonmetal
• Cation and Cation

Tags

NGSS.HS-PS1-3

Name this compound: P₂O₅

• Phosphorus Oxide

• Pentaphosphorus Dioxide

• Diphosphorous pentoxide

• Phosphoric Oxygen

Tags

NGSS.HS-PS1-1

How many moles are in 225 g of CO?

• 28.01 mole
• 4.82 x 10²⁴ mole
• 6,302,25 mole
• 8.03 mole

How many moles are in 4.3 x 10²⁴ molecules of H₂O?

• 6.02 x 10²³
• 7.14
• 18.02
• 128.66 

What is the molar mass of Fe?

• 26 g/mole
• 55.85 g/mole
• 56 g/mole
• 6.02 x 10²³ g/mole

What coefficient should be used to make the following equation balanced?
N₂+O₂--> _NO 

• 1
• 2
• 3
• 4