WorksheetsAtoms, equations and balancing
Total questions: 10
Worksheet time: 23mins
Which chemical contains the most atoms?
CaCO3
H2SO4
H2O2
Al2O3
Atoms are never ________________ or _____________ in a reaction.
created, destroyed
made, lost
transferred, swapped
broken, reformed
Chose all statements that are true for this unbalanced chemical equation:
Mg + O2 → MgO
There are more oxygen atoms on the left than on the right.
There is one magnesium atom before and after the arrow.
The equation is balanced.
The equation is not balanced.
What is the equation that goes with this reaction?
4H + 2O → 4H + 2O
H2 + O2 → H2O
2H2 + O2 → H2O
2H2 + O2 → 2H2O
What would be the balanced equation for this?
CH4 + 2O2 → 2H2O + CO2
CH2 + O3 → H2O + CO2
CH4 + 2O2 → H2O + 2CO2
2CH4 + 2O2 → 2H2O + CO2
2Na + Cl2 → 2_____
NaCl2
Na2Cl
NaCl
Na2Cl3
D N2 + E O2 → F NO2
D = No number, E = 2 and F = 2
D = 2, E = No number and F = 2
D = 2, E = 4 and F = 4
D = 1, E = 1 and F = 1
What should you start the balancing process with?
The metal
Non metals (not H or O)
Hydrogen and oxygen.
Anything you fancy.
Which is the correctly balanced version for this reaction:
Na + Br2 → NaBr
Na + Br → NaBr
Na + Br2 → 2NaBr
Na2 + Br2 → 2NaBr
2Na + Br2 → 2NaBr
What number(s) goes in the space indicated from but silver formulae?
Cu + __ AgNO3 → Cu(NO3)2 + __Ag
1
2
2 and then 3
3 and then 2
