CONVERSIONS
Calculate the molecular mass or formula mass of KCl
74.45 g/mol
What is Avogadro's number?
6.02x10^23
How many moles of Fe2O3 will form from 5.0 moles of Fe after it reacts with oxygen gas (O2)?
2.5 mol Fe2O3
What number do you need to divide by if you are given the grams of a substance and want to find the moles?
Molar Mass.
What do we look at to find mole ratios?
The coefficients in a balanced equation.
Fe3O4 + 4 CO--->3 Fe + 4 CO2
How many moles of CO are needed to react with
16.5 g of Fe3O4?
0.285 moles CO
For the combustion of methane:
CH4+2O2→CO2+2H2O
If you have 4 moles of oxygen gas, how many moles of water will be produced?
4 moles of H2O
How do we convert moles to grams?
Multiply by molar mass.
How many moles of KClO3 must decompose in order to produce 9 moles of oxygen gas (and KCl)?
6 moles KClO3
Balance this chemical equation:
C3H8+O2→CO2+H2O
C3H8+5O2→3CO2+4H2O
What do you need in order to convert moles of one substance to moles of another substance?
The Mole Ratio.
How many grams of NaCl will be produced from 1.25 grams of chlorine gas (Cl2) reacting with sodium?
2.06g NaCl
Fe+O2--->Fe2O3
Find the mole ratio of Iron to Oxygen
4:3
How many atoms are in 1 mole of a substance?
6.02 × 1023
Ammonium nitrate (NH4NO3) decomposes into dinitrogen monoxide gas (N2O) and water. Determine the amount in grams of water produced if 25.0 g of ammonium nitrate decomposes.
11.3grams H2O