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Science
Law Of Mass Action
Quiz 2
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Q.1
The number to the lower side of an element is a
Subscript
Superscript
Coefficient
Charge
Q.2
Na + Cl ------------> NaCl is a
Sintesis reaction
Decomposicion reaction
Combustion reaction
None of the above
Q.3
CO2 ---------> C + O2 is a
Synthesis reaction
Decomposicion reaction
Combustion
None of the above
Q.4
If a reaction starts with a totalof reactants it should produce
a total of 40g of products
a total of 75g of products
a total of 180 g of products
None of the above
Q.5
2KClO3 ---------> 2KCl + 3O2 is a
Synthesis reaction
Decomposition reaction
Combustion reaction
None of the above
Q.6
2C2H2 + 5O2 -------> 4CO2 + 2His a
Synthesis reaction
Decomposition reaction
Combustion reaction
None of the above
Q.7
C6H+ O2 ------> CO2 + His a
Synthesis Reaction
Decomposition Reaction
Combustion Reaction
None of the above
Q.8
In a synthesis reaction one reactant has a masss ofand the second reactant has 12g. How much mass should the product of this reaction have?
18g
12g
6g
None of the above
Q.9
Which of these is a chemical reaction?
Boiling water
Melting aluminum
Crushing a piece of chalk
Cooking an egg
Q.10
Oxygen must be present for what kind of reaction to occur?
Synthesis
Decomposition
Combustion
None of the above
Q.11
In the reaction AB-----> A + B reactant AB hasand product B has 5g. How many grams should product A have?
17g
2g
7g
None of the above
Q.12
If a reaction producesgrams, and one of its reactants hadgrams, how much did the other reactant had?
28 grams
18 grams
10 grams
8 grams
Q.13
The dissolving of ice tea powder in water is
not a chemical reaction
partly a chemical reaction
it has reactants and products
None of the above
Q.14
Does the equation H2+O2 →Hfollow the Law of Conservation of Mass?
Yes, because the atoms are equal.
No, because more info is needed.
No, because there are more atoms in the product.
No, because there are more atoms in the reactant.
Q.15
Law of conservation of mass states the amounts of atoms in the reactants and the products...
Increase
Decrease
Stay the same
No correct answer
Q.16
How many atoms do you have in the chemical formula 2Mg(ClO3)2?
2 atoms
7 atoms
9 atoms
18 atoms
Q.17
How many Ca (Calcium) atoms are found in Ca(OH)2?
5 atoms
3 atoms
2 atoms
1 atom
Q.18
How many atoms do you have in the compound 2MgCl2?
2 atoms
4 atoms
6 atoms
8 atoms
Q.19
A squid pushes water back with its tentacles to allow it to swim forward.
Law of Inertia
Law of Force and Acceleration
Law of Action-Reaction
Q.20
A person walks out of a store with a pillow at the top of an overflowing shopping cart. While walking to the car, the cart’s wheel hits a large rock, causing the cart to suddenly stop. The pillow slides forward.
Law of Inertia
Law of Force and Acceleration
Law of Action-Reaction
0 h : 0 m : 1 s
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