mole measurement of the number of particles in a sample 1 mol he (g) = 6.02 x 10 23 atoms 1 mol...

4.3- MOLAR VOLUME OF GASES

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Page 1: Mole measurement of the number of particles in a sample 1 mol He (g) = 6.02 x 10 23 atoms 1 mol CO 2(g) = 6.02 x 10 23 molecules

4.3- MOLAR VOLUME OF GASES

Molemeasurement of the number of particles in a sample

1 mol He (g) = 6.02 x 1023 atoms

1 mol CO2(g) = 6.02 x 1023 molecules

Molar Volume the volume of one mole of a gas at specified temperature and pressure

SATP = 24.8 L/molSTP = 22.4 L/mol

Page 4: Mole measurement of the number of particles in a sample 1 mol He (g) = 6.02 x 10 23 atoms 1 mol CO 2(g) = 6.02 x 10 23 molecules

Molar Volume Calculation

use the formula:

Page 5: Mole measurement of the number of particles in a sample 1 mol He (g) = 6.02 x 10 23 atoms 1 mol CO 2(g) = 6.02 x 10 23 molecules

Molar Volume Calculation

use the formula:

V=v/n

Page 6: Mole measurement of the number of particles in a sample 1 mol He (g) = 6.02 x 10 23 atoms 1 mol CO 2(g) = 6.02 x 10 23 molecules

use the formula:

Molar Volume Calculation

V=v/nMolar Volume

(L/mol)

Page 7: Mole measurement of the number of particles in a sample 1 mol He (g) = 6.02 x 10 23 atoms 1 mol CO 2(g) = 6.02 x 10 23 molecules

use the formula:

Molar Volume Calculation

V=v/n

Molar Volume (L/mol) Volume (L)

Page 8: Mole measurement of the number of particles in a sample 1 mol He (g) = 6.02 x 10 23 atoms 1 mol CO 2(g) = 6.02 x 10 23 molecules

use the formula:

Molar Volume Calculation

V=v/n

Molar Volume (L/mol) Volume (L)

# of moles (mol)

Page 9: Mole measurement of the number of particles in a sample 1 mol He (g) = 6.02 x 10 23 atoms 1 mol CO 2(g) = 6.02 x 10 23 molecules

Molar Volume QuestionWhat volume is occupied by 0.024 mol of carbon dioxide gas at SATP?

Page 10: Mole measurement of the number of particles in a sample 1 mol He (g) = 6.02 x 10 23 atoms 1 mol CO 2(g) = 6.02 x 10 23 molecules

Assignmentpage 169-171Do Everything

Page 11: Mole measurement of the number of particles in a sample 1 mol He (g) = 6.02 x 10 23 atoms 1 mol CO 2(g) = 6.02 x 10 23 molecules

Molar Mass (M)

the mass of one mole of a sample

measured in grams per mole (g/mol)

the identity of the substance DOES matter

Page 12: Mole measurement of the number of particles in a sample 1 mol He (g) = 6.02 x 10 23 atoms 1 mol CO 2(g) = 6.02 x 10 23 molecules

Calculating Molar Mass (M) write the correct formula determine the number of each type of atom

multiply the number of each type of atom by the atomic mass

add up the products

Page 13: Mole measurement of the number of particles in a sample 1 mol He (g) = 6.02 x 10 23 atoms 1 mol CO 2(g) = 6.02 x 10 23 molecules

Example Calculate the molar mass of Ca(NO3)2(s)

M = 1 Ca + 2 N + 6 O = (1•40.08) + (2•14.01) + (6•16.00)

= 164.10 g/mol

Page 14: Mole measurement of the number of particles in a sample 1 mol He (g) = 6.02 x 10 23 atoms 1 mol CO 2(g) = 6.02 x 10 23 molecules

Mass - Mole Conversionsuse the molar mass of a substance to convert between mass and moles

use the formula:

n=m M

Page 15: Mole measurement of the number of particles in a sample 1 mol He (g) = 6.02 x 10 23 atoms 1 mol CO 2(g) = 6.02 x 10 23 molecules

Mass - Mole Conversionsuse the molar mass of a substance to convert between mass and moles

use the formula:

n=m M

# of moles (mol)

Page 16: Mole measurement of the number of particles in a sample 1 mol He (g) = 6.02 x 10 23 atoms 1 mol CO 2(g) = 6.02 x 10 23 molecules

Mass - Mole Conversionsuse the molar mass of a substance to convert between mass and moles

use the formula:

n=m M

# of moles (mol)

mass (g)

Page 17: Mole measurement of the number of particles in a sample 1 mol He (g) = 6.02 x 10 23 atoms 1 mol CO 2(g) = 6.02 x 10 23 molecules

Mass - Mole Conversionsuse the molar mass of a substance to convert between mass and moles

use the formula:

n=m M

# of moles (mol)

mass (g)

molar mass (g/mol)

Page 18: Mole measurement of the number of particles in a sample 1 mol He (g) = 6.02 x 10 23 atoms 1 mol CO 2(g) = 6.02 x 10 23 molecules

Example Calculate the mass of 2.3 moles of Ca(NO3)2(s)

M = 1 Ca + 2 N + 6 O = (1•40.08) + (2•14.01) + (6•16.00)

= 164.10 g/mol

Page 19: Mole measurement of the number of particles in a sample 1 mol He (g) = 6.02 x 10 23 atoms 1 mol CO 2(g) = 6.02 x 10 23 molecules

Example n = m/Mm= nMm= 2.3 moles x 164.10 g/mol

m= 377.4 g

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