equations

Moles, mass and formula mass

Moles, mass and formula mass

moles = mass/mr

Percentage yield

• Percentage yield = (actual yield / theoretical yield) x 100

calculating empirical formula from masses

Step 1: Find the moles of each element using the equation moles = mass / Mr.

Step 2: divide each of the moles by the smallest number (of moles) calculated.

Step 2: divide each of the moles by the smallest number calculated.

what is the empirical formula

The empirical formula is the simplest whole number ratio of atoms of each element in a compound.

Moles, concentration and volume

moles = conc x volume

mass, concentration and volume

mass= conc x volume

Molar volume of a gas

volume of a gas (in dm^3) = moles x 24

1dm^3 in cm^3

1000

multiple for nano (n)

x10^-9

multiple for a micro(μ)

10^-6

multiple for a milli (m)

10^-3

multiple for a centi (c)

10^-2

multiple for a kilo (k)

10^3

multiple for a mega (M)

10^6

multiple for a Giga (G)

10^9

multiple for a tera (T)

10^12

how to find limiting reactant

1. find the moles of each reactant

2. find the molar ratio to a prodcut in the equation ( use the big numbers

3. find out how many moles each reactant will make of the product

4. therefore ------ is the limiting factor as it produces --- moles less than -----