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WorksheetsQ3 CHEMISTRY MIDTERM (part 2)
Total questions: 14
Worksheet time: 15mins
(a) AlF3 + (b) K2CO3 => (c) KF + (d) Al2(CO3)3
(a) K + (b) B2O3 => (c) K2O + (d) B
(a) N2 + (b) F2 => (c) NF3
Match the following
2C4H10+13O2 => 8CO2+10H2O
combustion
FeBr3+K3PO4 => FePO4+3KBr
double replacement
2KCl3 => 2KCl+3O2
decomposition
4Fe+3O2 => 2Fe2O3
synthesis
2NaBr+Cl2 => 2NaCl+Br2
single replacement
Match the following
NaCl+H2SO4 => NaSO4+HCl
double replacement
NaCo3 => Na2O+CO2
decomposition
Zn+HCl => ZnCl2+H2
single replacement
Mg+O2 => MgO2
synthesis
C6H12O6+O2 => CO2+H20
combustion
What is the molar mass of water?
(a)
How many grams are there in 2.00 moles of H2SO4?
(a)
How many grams are there in 2.50 moles of KNO (potassium nitrate)
(a)
How many moles of silver nitrate (AgNO3) are there in 80 g of silver nitrate?
(a)
How many moles of sodium carbonate (Na2CO3) are in 317.97 g of sodium carbonate?
(a)
What is Avogadro's number?
600 million
6.02
6.02 x 1023
1 mole
How many moles are in 6.02 x 1023 molecules of H2O?
602,000,000,000,000,000,000,000
2 moles
1 mole
6.02 moles
A mole is
the SI unit for mass
the SI unit for volume
the SI unit for the amount of a substance
the SI unit for area
Why is the mole used in chemistry?
the mass of atoms is in AMUs which is too hard to convert to grams
a dozen is not a scientific amount
chemists needed to make chemistry easier to understand
it makes counting large numbers of small particles easier
