Molar Mass Mayhem
What is the molar mass of Carbon (C). You must write this using the correct units.
12.011 g/mol
How many grams are in 3.00 x 1023 atoms of Carbon? Write your units
5.98 g Carbon
How many atoms are in 3.00 g of magnesium (Mg)?
7.43 x 1022 atoms of Mg
Define the Mole
1 mol = 6.02 x 1023 particles
A counting unit similar to a dozen
What is the molar mass of Oxygen Gas (O2). You must write the correct unit
31.998 g/mol
How many grams are in 1.00 x 1023 atoms of Helium? Write your units.
0.664 g He
How many atoms are in 7.50 g of sulfur (S)
1.41 x 1023 atoms of S
Define Avogadro's number
Equal to the number of particles in one mole
(6.02 x 1023 particles / 1 mol)
What is the molar mass of Carbon Dioxide (CO2). You must write this using the correct units
44.009 g/mol
How many grams are in 2.50 x 1022 molecules of Carbon Monoxide (CO)
1.163 g CO
How many oxygen atoms are in 12.0 g of O2
Note that you're converting grams -> moles -> molecules -> atoms
4.52 x 1023 atoms of O
Define Molar Mass
The mass of one mole of a substance. It can be found at the bottom of an element on the periodic table.
What is the molar mass of baking soda (NaHCO3)? Your answer must be written using correct units.
84.006 g/mol
You have 3.00 x 1024 molecules of Hydrogen Gas (H2). How many grams do you have?
10.0 g H
How many hydrogen atoms are in 10.0 g of ammonia (NH3)
1.06 x 1024 atoms of H
Define conversion factor and write them both
A ratio that converts units
1. Avogadro's Number
2. Molar Mass
Which of these two compounds has a higher molar mass? Show your work for points.
C2H6O or C2H4O2
C2H6O --> 46.07 g/mol
C2H4O2 --> 60.05 g/mol
What is the mass (g) that is produced from 4.00 x 1021 molecules of ammonia (NH3)
0.113 g NH3
You are given two separate samples:
Sample A: 12.0 g of CO2
Sample B: 10.0 g of NH3
Which sample contains more molecules?
Sample A: 1.64 x 1023
Sample B: 3.53 x 1023
Sample B produces more molecules
Why do we use conversion factors in stoichiometry?
Because you cannot directly convert grams to atoms and atoms to grams. You have to convert them first through moles, which both conversion factors contain.