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Worksheets9.1 Reactions and Equations
Total questions: 15
Worksheet time: 18mins
Which of the following observations could be an indication of a chemical reaction of antimony?
It is a solid at room temperature.
It melts at 631°C.
It expands upon freezing.
It burns in an atmosphere of chlorine.
The _________ symbol separates the reactants from the products and means "to yield".
+
(s)
→
(g)
A balanced chemical equation is a direct presentation of the ___________.
law of conservation of momentum
law of conservation of energy
law of conservation of mass
ideal gas law
Which of the following is the correct word equation for the chemical reaction shown below?
Aqueous aluminum and bromine gas react to produce solid aluminum bromide.
Solid aluminum and aqueous bromine react to produce solid aluminum bromide.
Solid aluminum and bromine gas react to produce solid aluminum bromide.
Aqueous aluminum and bromine gas react to produce aqueous aluminum bromide.
Balance the chemical equation shown below. What is the coefficient in front of O2(g)?
Fe(s) + O2(g) → Fe(2)O3(s)
2
3
4
5
Which is the correct atom count for the reactant side of the chemical equation?
CH4 + 2 O2 → CO2 + 2 H2O
C=4
H=4
O=4
C=1
H=4
O=2
C=1
H=4
O=2
C=1
H=4
O=4
Which contains the greatest number of elements?
5CH4
Fe2O3
C6H12O6
C8H10N4O2
Fill in the blanks with coefficient:
PCl5 +_ H2O →_ HCl + H3PO4
4, 5
1, 6
3, 8
2,2
Which problem is balanced?
PbO2 + 2H2 → H2SO4
SO2 + H20 → H2SO4
2Na + 2H2O → 2NaOH + H2
2Na + 2H2O → 2NaOH + H
Balance this equation
__Zn +__HCl →__ZnCl2 +__H2
1,1,2,1
1,1,1,2
1,2,1,1
2,1,1,1
Balance this equation
__N2 + __H2 → __NH3
1,2,3
1,3,2
1,1,2
2,1,1
How many hydrogen atoms are in: 3(NH4)2CrO4
4
6
8
24
Balance this equation:
P4 + O2 → P2O3
3 P4+ O2 → 2 P2O3
P4+ O2 → 2 P2O3
P4+ 3 O2 → 2 P2O3
P4+ 2 O2 → 3 P2O3
