Particles
The number of atoms in 1 mole of He
What is 6.02x1023 atoms?
The number of moles of Mg equal to 48.62 grams Mg
What is 2.00 moles Mg?
48.62 g x (1 mol)/(24.31 g)
The volume of 3.0 moles He @ STP
What is 67.2 L He?
3 mol x (22.4 L)/(1mol)
Which has more atoms
1 mole of argon
2 moles of neon
or 3 moles of helium?
What are the coefficients for the following:
_Al + _O2 --> _ Al2O3
What is 4, 3, 2?
The number of moles represented by 1.204 x1021 atoms of Ne.
What is 2.0x10-3 (0.0020) mol Ne?
(1.204 x 10^21 atms) x (1 mol)/(6.02 x 10^23 atms)
The mass of 0.50 moles of Calcium
What is 20 g Ca?
0.50 mol x (40 g)/(1 mol)
The number of moles of Ne in 33.6 L of Ne. (@STP)
What is 1.5 mol?
33.6 L x (1 mol)/(22.4L)
Which has the smallest mass?
1 mole Ar
2 mol Ne
3 mol He
Use the following
1 handlebar + 2 wheels ---> 1 bicycle
If you have 12 handlebars and 30 wheels, how many bicycles can you make?
what is 12 bicycles?
The number of moles in 4.45 x 1035 atoms of carbon
What is 7.39 x 1011 atoms of Carbon?
4.45 x 1035 atoms x (1 mol)/(6.02 x 10^23 atms)
The mass of 3.0 moles NF3?
What is 213.03 g NF3?
3.0 mol x (71.01 g) / (1 mol)
Given STP and 1 mole of each substance, which molecule takes up the greatest volume as a gas: CO2, H2O, or Cl2.
They are all the same volume!
What conversion factor would you use to convert 2.5 moles of CH4 to molecules?
What is (6.02 x 10^23 molecules)/(1 mol)
2H2 + O2 ---> 2 H2O
If you have 10 moles of H2 and unlimited O2, how many moles of H2O can you form?
The number of atoms found in 14 grams of Silicon.
What is 3.01 x 1023 atoms Si?
(14 g) x (1 mol)/(28.09 g) x (6.02 x 10^23 atms)/(1mol)
The number of moles equal to 103.87 grams of Br2.
What is 0.65 moles Br2?
80.0 g x (1 mol)/(159.80 g)
The number of atoms in 1.0 L of a gas (@ STP)
What is 2.6x1022 atoms?
1.0 L x (1 mol)/(22.4 L) x (6.02 x 10^23 atoms)/(1 mol)
What conversion factors would you use to calculate 350 L of H2 at STP to molecules of H2?
(1 mol)/(22.4 L) x (6.02 x 10^23 molecules)/(1 mol)
Use the following recipe:
2C sugar + 3 eggs ----> 2 dozen cookies
How many eggs do I need to make 72 cookies?
what is 9 eggs?
The number of molecules found in 5.6 L of O2.
What is 1.51 x 1023 molecules O2
5.6 L xx (1 mol)/(22.4 L) xx (6.02 x 10^23 moleculs)
The mass of 10 L CO2 (gas) at STP
What is 19.65 g CO2?
10 L x (1 mol)/(22.4 L) x (44.01 g)/(1 mol)
16 grams of CH4 is vaporized into a gas. What volume, in liters, does the gas occupy? (@ STP)
What is 22.4 L CH4?
16 g x (1 mol)/(16 g) x (22.4 L)/(1 mol)
What is the difference between atoms and molecules?
An atom is a single neutral particle and a molecule is made up of two or more atoms bonded together.
After measuring the mass of a pure substance, you found its mass to be 4.95 g. If you know you have 1.23 x 10^23 atoms, what is the identity of this substance?
What is magnesium?