Chemical Quantities

What is the name of the following compound: K₂SO₄

• potassium sulfur

• potassium sulfate

• potassium (I) sulfate

• potassium (II) sulfide

What is the name of the following compound: Mn₂O₃

• manganese oxide

• manganese (II) oxide

• manganese (III) oxide

• magnesium oxide

The name of the compound Ca₃(PO₄)₂

• calcium phosphate

• tricalcium diphosphate

• calcium phosphorus oxide

• calcium phosphide

What is the formula for calcium carbonate?

• CaCO
• CaCO₂
• CaCO3
• Ca3CO3

What is the name of K₃PO₄?

• Tripotassium Phosphate
• Tripotassium Phosphite
• Potassium phosphide
• Potassium phosphate

What is the name of N₂O₃

• Nitrogen trioxide
• Dinitrogen oxide
• Dinitrogen trioxide
• Nitrogen oxide

What is the chemical formula for Tetrasulfur pentoxide?

• SO
• S₄O
• S₄O₅
• S₅O₄

What is the percent by mass of fluorine in CaF₂ (gram-formula mass = 78 g/mol)? include one decimal place and the percent sign.

Find the percent composition of Cu₂S?

• %Cu= 67.987 %S= 32.013
• %Cu= 79.854   %S= 20.145
• %Cu= 35.946   %S= 64.054

Calculate the % composition by mass of oxygen present in H₂SO₄. include two decimal places and the percent sign in your answer.