chemistry test

Question 1

what is a mole

Answer 1

a mole is q quantity

Question 2

what is a mole equal too

Answer 2

6.02 x 10^23

Question 3

Avogadro’s number

Answer 3

6.02X10^23

Question 4

how to find formula mass

Answer 4

We can determine the formula mass of a compound by adding the atomic masses of each element in the formula

Question 5

percent composition

Answer 5

To determine percent composition, you take the mass of each element in the formula and divide by the total mass of the compound.

Question 6

To find the number of particles when given the number of moles:

Answer 6

of moles given * 6.02 x 10^23 particles

Question 7

To find the number of moles when given the number of particles:

Answer 7

of particles given x 1 mole / 6.02 x 1023 particles

Question 8

To calculate the mass from the number of moles of a substance:

Answer 8

number of moles given x formula mass/ 1 mole

Question 9

To calculate the number of moles from the mass:

Answer 9

mass given x 1 mole / formula mass

Question 10

To calculate the volume from the number of moles of a substance:

Answer 10

number of moles given x 22.4 Liters/ 1 mole

Question 11

To calculate the number of moles from the volume:

Answer 11

volume given x 1 mole/
22.4 Liters