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Exam 5: Molecules and Compounds

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Question 41

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In ionic compounds the net positive charge always equals the net negative charge.

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Question 42

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Choose the pair of names and formulas that do NOT match.

A) copper(I) nitrate: CuNO₃
B) copper(II) nitride: Cu₃N₂
C) copper(II) nitrate: Cu(NO₃) ₂
D) copper(II) nitrite: Cu(NO₂) ₂
E) all of these are correct

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Question 43

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The element nitrogen normally exists in nature as a diatomic molecule.

How many O atoms are present in sodium chlorite?

Metal cations that form more than one type of ion are usually found in the section of the periodic table known as the transition metals.

Life could not exist with just 91 elements if they did not combine to form compounds.

What is correct name of the compound whose formula is N₂O₄?

Suppose that in an ionic compound,"M" represents a metal that could form more than one type of ion.In the formula MF₂ ,the charge of the M ion would be:

A certain oxyacid is derived from the oxyanion SO₃^2-.The formula for the oxyacid is:

SO₂ is an ionic compound.

Suppose that in an ionic compound,"M" represents a metal that could form more than one type of ion.In the formula MP ,the charge of the M ion would be:

What is the formula for the acetate polyatomic ion?

What is the name of HNO₂?

What is the formula for an ionic compound made of carbon and oxygen?

Carbonic acid,H₂CO₃ ,contains the carbonate oxyanion.

Which formula shown is incorrect for the name given?

Which of the following species is a molecular element?

Ionic compounds have a net charge of zero.

A compound has a formula mass of 61.98 amu and is comprised of atoms of sodium and oxygen in a definite ratio.The name of the compound described here is:

When elements combine to form compounds,their properties only change slightly.