Lab: Motion — Cumulative exam Answers
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The diagram shows Ned’s movement as he left his house and traveled to different places throughout the day.Which reference point should be used to find out how far Ned traveled when he went from the pet store to the swimming pool?
A
VB
WC
XD
Z22
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Which best represents the reaction of calcium and zinc carbonate (ZnCO3) to form calcium carbonate (CaCO3) and zinc?
A
Ca → ZnCO3 + CaCO3 → ZnB
Ca + ZnCO3 → CaCO3 + ZnC
CaCO3 + Zn → Ca + ZnCO3D
CaCO3 + Zn + Ca → ZnCO323
Atoms of two different elements must have different
A
electrical charges.B
numbers of neutrons.C
atomic numbers.D
energy levels.24
Ciara’s bike has rusted, which means that the iron in the metal changed to rust.
A
an energy formationB
an exothermic reactionC
a chemical reactionD
a precipitate formation25
When balanced, which equation would have the coefficient 3 in front of any of the reactants?
A
Zn + HCl ZnCl2 + H2
B
H2SO4 + B(OH)3 B2(SO4)3 + H2OC
Fe + AgNO3 Fe(NO3)2 + AgD
C2H4O2 + O2 CO2 +H2ODid you find these answers helpful?
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