Chemistry- Calculations

?
Relative Atomic Mass (Definition)
The ratio of the average mass of one atom of an element to one twelfth of the mass of an atom of carbon-12.
1 of 16
Relative Atomic Mass (Working Out)
R.A.M= (% of isotope 1 × mass of isotope 1) + (% of isotope 2 × mass of isotope 2) ÷ 100
2 of 16
Empirical Formula (Definition)
Simplest whole number ratio of the various types of atoms in a compound.
3 of 16
Empirical Formula (Working Out)
1) Find Masses 2) Look up given masses 3) Divide masses by R.A.M 4) Find the Ratio
4 of 16
Moles (Definition)
The mole is the unit for amount of substance. The molar mass is the relative formula mass of a substance in grams (measured in g/mol).
5 of 16
Moles (Working Out)
Number of Moles = Mass of Substance (g) / Ar or Mr
6 of 16
Number of Particles (Working Out)
Number of Particles= Number of Moles x Avagadro's constant
7 of 16
Avagadro's Constant (Definition)
Number of units in one mole of any substance - 6.02 × 10^23
8 of 16
Concentration (Definition)
The amount of solute dissolved in a stated volume of a solution
9 of 16
Concentration (Working Out)
Concentration = Mass of Solute (g) / Volume of Solution (dm^3)
10 of 16
Molecular Formula (Definition)
Molecular formula tells you how many atoms of each element are in a compound
11 of 16
Molecular Formula (Working Out)
1) Calculate the empirical formula mass 2) Divide the gram molecular mass by the empirical formula mass 3) Multiply each of the subscripts within the empirical formula by the number calculated in Step 2.
12 of 16
Law of Conservation (Definition)
The Law of Conservation states that during the process of a reaction, mass is neither created nor destroyed. Therefore, according to the law of conservation of mass, the mass of the products in a chemical reaction must equal the mass of the reactants
13 of 16
Limiting Reactant (Definition)
The reactant that is all used up.The mass of product formed in a reaction depends upon the mass of the limiting reactant. This is because no more product can form when the limiting reactant is all used up.
14 of 16
Stoichiometry (Definition)
Stoichiometry is the calculation of reactants and products in chemical reactions.
15 of 16
Stoichiometry (Working Out)
1) Balance the equation 2) Convert units of a given substance to moles 3) Using the mole ratio, calculate the moles of substance yielded by the reaction 4) Convert moles of wanted substance to desired units.
16 of 16

Other cards in this set

Card 2

Front

R.A.M= (% of isotope 1 × mass of isotope 1) + (% of isotope 2 × mass of isotope 2) ÷ 100

Back

Relative Atomic Mass (Working Out)

Card 3

Front

Simplest whole number ratio of the various types of atoms in a compound.

Back

Preview of the back of card 3

Card 4

Front

1) Find Masses 2) Look up given masses 3) Divide masses by R.A.M 4) Find the Ratio

Back

Preview of the back of card 4

Card 5

Front

The mole is the unit for amount of substance. The molar mass is the relative formula mass of a substance in grams (measured in g/mol).

Back

Preview of the back of card 5
View more cards

Comments

No comments have yet been made

Similar Chemistry resources:

See all Chemistry resources »See all Calculations, moles and yield resources »