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
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