chem unit 3

Question 1

How do you find Molar Mass

Answer 1

By adding up all the atomic numbers

The little numbers on the top right (H=1.01)

Question 2

How do you find Molarity

Answer 2

M=n/v

Question 3

How do you find Volume

Answer 3

V=n/M

Question 4

How do you find Moles

Answer 4

n=M (times) V

Question 5

How do you find Grams

Answer 5

1. Find Molarity
2. Find number of Moles
3. Muliply Molarity and Moles togerther to find amount of grams

Question 6

How do you find the the concetration in a new solution if you only have the concetration of an old solution.

Answer 6

You use the formula M1 * V1 = M2*V2
you are gonna plug in the two known concetrations in M1 and M2 and the known end volume in to V2 then solve.

Question 7

How do you find the amount of moles using Avogadro’s number

Answer 7

eqaution
n= molecules/Avogadro’s number

Question 8

How do you find the mass.

Answer 8

mass = molar mass * moles

Question 9

How do you find the number of moles using grams

Answer 9

n=grams/molar mass

Question 10

How do you find the number of particals

Answer 10

Particals = moles * Avogadro’s number

Question 11

How do you calucate the number of moles from particals

Answer 11

n= molecules or atoms/Avogadro’s number

Question 12

How do you find the number of atoms or molecules

Answer 12

atoms or molecules= moles * avogadros number

Question 13

How do you find the number of moles if only given (ZnOH) and grams of substance

Answer 13

1. find molar mass
2. divide the amont of grames over molar mass

Question 14

How do you find the molar mass, if you are only given amount of moles and mass in grams

Answer 14

molar mass = grams/moles

Question 15

Number of moles if only given molescules and avagadros number

Answer 15

n=molescules/Avagadros number

Question 16

How do you find molar mass if only given moles and mass in grams

Answer 16

Molar mass = mass in grams/moles