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WorksheetsBalancing Chemical Equations 1
Total questions: 15
Worksheet time: 40mins
N2+O2--> _NO
Which equation is balanced?
PbO2 + 2H2
SO2 + H20 --> H2SO4
2Na + 2H2O --> 2NaOH + H2
Mg + __HCl ---> MgCl2 + H2
What law governs the balancing of chemical equations?
Law of Energy
Law of Conservation of Matter/Mass
Law of Gravity
Law of Matter Movement
Balance this equation
_Al +_HCl --> _H2 +_AlCl3
2,6,3,2
it's already balanced
4,12,3,4
2,1,4,5
What are the coefficients that would properly balance this equation?
__Ca + __H2O --> __Ca(OH)2 + __H2
2,1 --> 2,1
1,2 --> 1,1
1,2 --> 2,4
1,2 --> 2,1
Mn + _ HNO3 → Mn(NO3)2 + H2
Al(NO3)3 + _ NaOH -> Al(OH)3 + 3 NaNO3
The Law of Conservation of Matter
tells how many atoms of an element are contained in one molecule or formula unit.
the starting materials in a chemical reaction
the new substances that are formed in a chemical reaction
A law stating that atoms are not created or destroyed during a chemical reaction.
(Check ALL answers)
2H2 + O2 --> 2H2O
2H2 + O2 --> 2H2O
3Cr(MnO4)6
