Moles/Grams
What is a Mole?
How many atoms in 1 mole of carbon?
6.022x1023 atoms
How many Liters are there in .25 moles of CH4 at STP
5.6L
What is the definition of Molarity
Unit for quantifying concentration for aqueous solutions
What is the empirical formula for C4H10O2
C2H5O
What is the mass of 1 Mole of carbon? What is the mass of 2 moles of Carbon?
12g and 24g
Determine the number of moles in 5.24x1022 molecules of carbon dioxide?
0.087 moles
There are 3.011x1024 Molecules of N2, determine the volume at STP
113L
What is the molarity of 0.5 moles of CuCl2 in a 5L solution
0.1M
Determine the percentage composition for Calcium Chloride
Ca 36% Cl 64%
How many Moles are there in 16g of Na2SO4
0.11Moles
Determine the number of atoms in 0.40 moles of O3
7.2x1023 atoms of O
What Mass of H2 is in a 61.25L Balloon at NTP
6.13x1022
Determine the volume of of the solution required to obtain 8.0g of CH3OH from a 0.10 M solution of Methanol.
2.5L
Determine the empirical formula for the compound that is 81.8% C by mass and 18.2% H by mass.
C3H8
What is the mass of 2.5 Moles of octane
285g
1.32x1023 Particles
What volume will be occupied by 2.0x1024 molecules of CH4 at NTP?
80L
How many molecules of sugar are found in 400mL of 0.2M glucose?
4.8x1022 molecules
A 15.00 gram sample of lead(?) oxide is found to contain 12.99 grams of lead. What is the ? in the formula?
Pb2O
Determine the number of moles for 2.67g of Sodium Carbonate.
.025moles
Determine the mass of 1.5x1025 molecules of Carbon tetrafluoride
2200g
A mixture if natural gas (CH4 and C2H6) weighing 10.0g has a volume of 9.00L at NTP. What is the percent composition by mass of CH4 in the mixture?
13.7% CH4 86.2% C2H6
What is the mass of ethanol (C2H6O) in a 300mL solution at 0.4M?
5.52g
A substance is found to have the following composition:
53.33% C 15.55% H 31.11% N
Further information is determined that the substance has a molar mass (via mass spec) of 135 g/mole. What is the chemical formula of the substance?
See board