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Vocabulary
Key Concepts
Important things
Representative particles and moles
100
6.02x10^23
What is a mole?
100
The atomic mass of an element expressed in grams is the mass of a mole of the element.
How is the atomic mass of an element related to the molar mass of the element?
100
moles=representative particles x 1 mole/6.02 x 10^23 presentative particles.
What is the formula for converting the number of particles to moles?
100
N
What is the chemical formula for Atomic Nitrogen?
200
The number of repersentative particles in a mole.
What is Avogadros number?
200
A mole of any substance contains Avagadros number of representative particles.
Describe the relationship between Avagadros number and one mole of any substance?
200
volume of gas= moles of gas x 22.4/ 1 mol
How do you calculate volume at STP?
200
A molecule
What is the representative particle for Nitrogen gas?
300
refers to the species present in a substance; usually atoms, molecules, or formula units
What is a representative particle?
300
By count, mass, and volume.
What are 3 ways to measure the amount of something?
300
grams/mole= grams/L x 22.4L/ 1 mole
How do you calculate Molar Mass from Density?
300
A molecule
What is the representative particle for water?
400
mean a temperature of 0 degress celcius and a pressure of 101.3 kPa, or 1 amu.
What is Standard Temperature and Pressure?
400
at STP , 1 mole or 6.02x10^23 representative particles, of any gas occupies a volume of 22.4 L.
What is the volume of one mole of any gas at STP?
400
% of mass= mass of element in 1 mol compound/ molar mass of compound
What is the percent composition from the chemical formula?
400
Ion
What is the representative particle for calcium ion?
500
The relative amounts of the elements in a compound are expressed as the percent composition.
What is a percent compostition?
500
Is the number of grams of the element divided by the mass in grams of the compound, multiplied by 100%
How do you calcuate the precent by mass of an element in a compound?
500
gives the lowest whole number ratio of the atoms of the element in a compound.
What is the empirical formula?
500
Formula unit
What is the representative particle for calcium flouride?