Ch 27

Question 1

What is a compound?

Answer 1

A pure substance made of two or more elements in a fixed proportion

Question 2

Noble gases are the only elements that can’t

Answer 2

React with other elements to form compounds

Question 3

What is a combination of two or more atoms held together by covalent bonds

Answer 3

A molecule

Question 4

Ionic compounds do not form

Answer 4

True molecules

Question 5

What is Avogadro’s Number?

Answer 5

6.022 * 10^23

Question 6

The law of constant composition states that

Answer 6

All samples of a given compound contain the same elements in identical mass ratios

Question 7

What is the percent composition?

Answer 7

Mass percent of element / Formula weight of compound all multiplied by 100

Question 8

The limiting reactant is the reactant with

Answer 8

Fewer moles

Question 9

What is the equation for percent yield

Answer 9

Actual / Theoretical * 100

Question 10

To determine a molecular formula, what must be calculated?

Answer 10

The empirical mass of a compound

Question 11

What is less, the actual or theoretical yield?

Answer 11

Theoretical yield