Balancing Rxn's and Polyatomic Ions

Which polyatomic ion has the formula, NO₃^-?

• Nitrogen trioxide

• Nitrate

• Ammonium

• Phosphate

The formula for copper (I) sulfate is...

• Cu₂SO₄

• CuSO₄

• Cu(SO₄)₂

• CuSO₂

Which ionic compound has the formula Na₃PO₄?

• sodium phosphorus oxide

• ammonium phosphide

• sodium phosphate

The formula for lithium hydroxide is...

• LiO

• LiOH

• Li(OH)₂

• LiHO

In a chemical equation, these always go on the left side of the arrow.

• Reactants

• Products

• Polyatomic ions

• Pure elements

When balancing chemical equations, you should...

• add coefficients or subscripts, depending on the situation

• add coefficients in front of molecules

• add parentheses and subscripts to balance polyatomic ions

If there is an odd number of an element on side of a reaction equation and an even number on the other side...

• the equation cannot be balanced

• use subscripts that result in the least common multiple

• use coefficients that result in the least common multiple

Which of the following statements about polyatomic ions is FALSE?

• Polyatomic ions form covalent bonds with other polyatomic ions

• Polyatomic ions form ionic bonds with other polyatomic ions

• Polyatomic ions are held together by covalent bonds

• You can count a polyatomic ion as a unit when balancing equations, but only if it appears on BOTH sides of the equation

What is the name for CN^-

• cyanide

• carbon nitride

• nitrite

The formula for ammonium chloride is...

• NH₄Cl

• NH₄ClO₃

• AlClO₃

• AmCl