WorksheetsLaw of Conservation of Matter - Reactions
Total questions: 15
Worksheet time: 30mins
What reaction type is the following chemical equation?
Zn(s) + 2HCl(aq) = ZnCl2(aq) + H2(g)
Single Replacement
Double Replacement
Synthesis
Decomposition
What reaction type is the following chemical equation?
HCl + KOH → KCl + H2O.
Single Replacement
Double Replacement
Synthesis
Decomposition
What reaction type is the following chemical equation?
2HgO(s)→2Hg(l)+O2(g)
Single Replacement
Double Replacement
Synthesis
Decomposition
What reaction type is the following chemical equation?
Zn(s) + 2HCl(aq) = ZnCl2(aq) + H2(g)
Single Replacement
Double Replacement
Synthesis
Decomposition
What reaction type is the following chemical equation?
H2CO3(aq)→CO2(g)+H2O(l)
Single Replacement
Double Replacement
Synthesis
Decomposition
What reaction type is the following chemical equation?
2CO + O2 →2CO2
Single Replacement
Double Replacement
Synthesis
Decomposition
What type of reaction is the following chemical equation?
4Al + 3O2 →2Al2O3
Single Replacement
Double Replacement
Synthesis
Decomposition
What type of reaction is the following chemical equation?
Fe(s) + CuSO4 (aq)→ FeSO4 (aq) + Cu(s)
Single Replacement
Double Replacement
Synthesis
Decomposition
Jenny wanted to make 3 molecules of a substance made with aluminum and oxygen. How many aluminum and oxygen atoms will she need?
1 aluminum; 1 oxygen
2 aluminum; 3 oxygen
3 aluminum; 6 oxygen
6 aluminum; 9 oxygen
What does the 2 represent in front of H2 represent?
2H2 + O2→2H2O
It indicates that there are 4 hydrogen atoms after you add the coefficient and the subscript
It indicate that there are a total of 4 hydrogen atoms all bonded together as a single molecule
It indicates that there are 2 hydrogen molecules chemical bonded together in the reaction
It indicates that there are 2 separate hydrogen molecules in the reaction
The students' data can be seen here. A chemical reaction clearly took place in the flask. One entry is missing: the mass of the system at the end of the experiment. What amount should be added to the data table?
485.68g
less than 485.68g
more than 485.68g
cannot be determined
A lab group reacts sodium oxide (Na2O) with hydrochloric acid (HCl) to produce sodium chloride (NaCl) and water (H2O). When writing their lab report, they came up with the following equation to represent the reaction:
Na2O + HCl →NaCl + H2O
Yes, since there are 5 reactant atoms and 5 product atoms.
Yes, since there is a subscript of 2 on both sides on the equation.
No, since there are two sodium atoms as reactants, but only one sodium atom as a product.
No, since there is a liquid and a solid as reactants, but a gas and a solid as a product.
A student draws a picture of the products and reactants of a chemical reaction. What, if anything, is wrong with the drawing?
The drawing is wrong because there are more chemicals on the products side.
The drawing is correct because there are 12 compounds on each side of the arrow.
The drawing is wrong because there are different compounds on each side of the arrow.
The drawing is correct because there are 12 atoms of each type on each side of the arrow.
(a) are located on the LEFT side of the arrow in a chemical reaction.
Example:
2Na(s) + O 2(g) → 2Na 2O(s)
(a) are located on the RIGHT side of the arrow in a chemical reaction.
Example:
2Na(s) + O 2(g) → 2Na 2O(s)
