Chapter 3

Question 1

Density formula?

Answer 1

P= m/v

Question 2

Molecular formula

Answer 2

Gives the identites & number of the atoms in the molecule

Question 3

Empircal formula

Answer 3

Is when the smallest whole number is use to simply the formula

Question 4

Formuula weight is calculated from the _______________________

Answer 4

Molecular weight (amu)

Question 5

One mole of anything is ______________________

Answer 5

Avarado number (6.02x 10^23)

Question 6

A mole is also calculated how?

Answer 6

mass of grams / molecular weight

Question 7

To calculate the percent composition off a molecule just find how much of an atom there is in a molecule & divide by the ______________________

Answer 7

Molecular weight

Question 8

What is the equation for molarity?

Answer 8

number of moles/ number of liters in a solution

Question 9

What is the equation for a mole fraction ?

Answer 9

number of mass of substance / total number of moles in a solution

Question 10

When dealing with chemical equation what is the first thing you have to do?

Answer 10

Balance the equation (you can use the coffients (the numbers in front of the atom) to calcule the amount for a question)

Question 11

The limiting reagent is the reagent you’ll run out of ____________

Answer 11

First

Question 12

In a balanced equation molecules, __________ can be also written

Answer 12

phases (Like solids, liquids, gases)

Question 13

The delta sign on top of an reaction arrow means what?

Answer 13

Heat

Question 14

Anything below a reaction arrow means what?

Answer 14

Catalyst

Question 15

Oxidation state indicated how many _______________ an atom has

Answer 15

Electrons

Question 16

The oxidation state of an atom is the ____________ it would have if the compound were ionic

Answer 16

Charge