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Counting Particles of Matter
Avogadro Constant
Moles
Volume & Ideal Gas Law
Theoretical Yield & Mass %
100
This is a group used to count atoms, molecules, or formula units of substances.
What is a mole?
100
Find the number of atoms of Fe that are in a 5.8 g iron bar. Using the atomic mass of Fe at 55.8 u. The final units for this problem would be this.
What are atoms?
100
This number of moles would represent a total mass of 64 g of O2.
What is 2 mol?
100
This is the conversion factor finding molar volumes at STP.
What is 1 mol/22.4 L?
100
This value is always less than the theoretical yield when conducting an experiment.
What is the actual yield?
200
This is a method for measuring amounts of substances involved in chemical reactions and relating them to one another.
What is stoichiometry?
200
Find the total number of ions in 10.8 g of magnesium bromide. The final units to solve this problem would be this.
What are ions?
200
1 mole of sodium could represented by this number of grams.
What is about 23 g?
200
This unit of temperature is used in finding the volume of a gas at STP or using the ideal gas law.
What is Kelvin?
200
This is the equations used to compare the actual yield to the theoretical yield in an experiment.
What is % yield= (actual yield/theoretical yield) x 100%?
300
One mole of magnesium atoms can fit into this.
What is the palm of a hand?
300
The mole to mass conversion factor for oxygen gas would be this.
What is 1 mol/ 32 g O2?
300
5 moles of H2O would have a mass of this number of grams.
What is 90 g?
300
8.31 kPa x L/mol x K is known as this quantity in the ideal gas law.
What is 'R' or the constant?
300
This can be found by comparing the mass of an individual element in a compound to the total mass of that compound and multiplying by 100%.
What is the mass % of that individual element in the compound?
400
This number is known as the Avogadro constant.
What is 6.02 x 10^23?
400
If you know the mass of a ream of paper and the mass of a single sheet of paper, then by using the Avogadro constant you can find the number of this.
What is the number of sheets of paper in the ream?
400
This is how these two molar masses compare: 2 moles of CO2 and 2 moles of H2O.
What is 2 moles of CO2 has greater mass than 2 moles of H2O?
400
This is how the ideal gas law equations would be converted if you needed to find the pressure of a gas.
What is P=nRT/V
400
This is almost always different than the molecular formula.
What is the empirical formula?
500
The Avogadro constant is used in a calculation as a conversion factor in order to find the number of these.
What are atoms?
500
This helps us to easily count the number of items in a group without counting each individual item.
What is the Avogadro constant?
500
This number of grams would be required to be used in an experiment that calls for 8 moles of carbon.
What is 96 g?
500
This is the unit for pressure when using the ideal gas law.
What is kPa?
500
This is the major element in CO2 when referring to both mass and number of atoms.
What is oxygen?