Compounds

Question 1

Elena makes the table below to determine the number of atoms of each element in the chemical formula 3(NH4)2SO4.What mistake did Elena make?

Revolt · Accepted Answer

She should not have multiplied the sulfur atoms by the subscript 4.

Question 2

Which is the best description of a molecule?

Revolt · Accepted Answer

A molecule of a compound is composed of at least two atoms.

Question 3

There are several ways to model a compound. One type of model is shown.

Revolt · Accepted Answer

C6H12O2

Question 4

How many atoms of nitrogen are in the chemical formula Ni(NO3)2?

Revolt · Accepted Answer

2

Question 5

Which statement describes how chemical formulas, such as H2O, represent compounds?

Revolt · Accepted Answer

They show the elements that make up a compound.

Question 6

The compound magnesium phosphate has the chemical formula Mg3(PO4)2. In this compound, phosphorous and oxygen act together as one charged particle, which is connected to magnesium, the other charged particle.What does the 2 mean in the formula 5Mg3(PO4)2?

Revolt · Accepted Answer

There are two phosphate ions in a molecule of magnesium phosphate.

Question 7

Two models of the same compound are shown.

Revolt · Accepted Answer

Model B shows how the atoms in the molecule are connected, but Model A does not.

Question 8

Which of these is a compound?

Revolt · Accepted Answer

CO2

Question 9

How many atoms of each element are in the chemical formula P2O5?

Revolt · Accepted Answer

2 phosphorus and 5 oxygen

Question 10

There are several different models that represent compounds. One type of model is shown.

Revolt · Accepted Answer

a ball-and-stick model

Compounds Answers

More from this Course

TRY EDGENUITY HACKS