WorksheetsLCM Quiz Review (SPS3.ab)
Total questions: 15
Worksheet time: 44mins
The drawing shows solid carbon dioxide changing into carbon dioxide gas. Which statement describes the relationship between the solid carbon dioxide and the carbon dioxide gas after all of the solid has changed to gas?
They have the same volume.
The gas has less volume than the solid.
They have the same mass.
The gas has less mass than the solid.
When heated, mercuric oxide decomposes to form liquid mercury and oxygen. A scientist heated 10 grams (g) of mercuric oxide and formed 9.3 grams of liquid mercury. How many grams of oxygen were formed?
0.7 g
9.3 g
10.0 g
19.3 g
Sodium sulfate and barium chloride react with each other to form sodium chloride and barium sulfate as shown. Which statement MOST accurately describes the mass of the reactants compared to the mass of the products?
The mass of the reactants is the same as the mass of the products.
The products have a greater mass because matter was created during the reaction.
The reactants have a greater mass because some of the mass was converted to heat.
The reactants have a greater mass because some matter was destroyed by the reaction.
Which of the following is a correctly written chemical equation that demonstrates the conservation of mass?
Mg + HC1 --> H2 + MgCl2
H2O + CO2 --> H2CO3
KC1O3 --> KC1 + O2
H2 + O2 --> H2O
If a chemical reaction occurs in an open system (not contained), what might happen to the measurable mass of the products when compared to the reactants?
the measurable mass might decrease because any gas produced can escape (the actual mass would stay the same)
the mass would increase because mass was created
the measurable mass would stay the same because nothing would be able to leave the system.
it depends on the type of reaction
________ are the starting substances in a chemical equation.
Reactants
Producer
Reaction
Products
How many grams of OXYGEN would be needed to show conservation of mass in the example below?
100 g
93 g
7 g
0 g
MgCl2 represents a chemical
Element
Chemical Formula
Subscript
Coefficient
The substances listed on the right side of a chemical equation are the
Coefficients
Reactants
Products
Precipitates
How many atoms of Carbon are in the following formula?
3C2H6
3
6
9
18
How many atoms of Hydrogen are in the following formula?
3C2H6
3
6
9
18
What are the coefficients that will balance the skeleton equation below?
__Na + __F₂ → __NaF
1, 2, 1
2, 1, 2
1,1,1
2,2,2
What are the coefficients that will balance the skeleton equation below?
__Na + __MgF₂ → __NaF + __Mg
2,1,1,2
1,2,1,2,
2, 1, 2, 1
1,2,2,1
What are the coefficients that will balance the skeleton equation below?
__Fe +__O₂ → __Fe₂O₃
3,4,2
4, 3, 2
2,3,4
4,2,3
