Reaction Review (mild): Question Preview (ID: 13395)

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1. Solution A has a mass of 70 g. Solution B has a mass of 40 g. When they are mixed, a chemical reaction occurs. What should the mass of the final mixture be?
a) 40 grams b) 11 grams c) 70 grams d) 110 grams
You and your partner combined an acid and a metal. Your observations said that it was an exothermic reaction. What does this mean?
a) Mass was lost b) Mass was gained c) Heat/energy was absorbed d) Heat/ energy was released
What ALWAYS happens during a chemical change?
a) The temperature increases b) The color changes c) The elements and atoms rearrange and form a new substance d) The change produces gas
What is the definition of “reactants” in a chemical reaction?
a) When a reaction releases heat b) When a reaction absorbs heat c) The chemicals that are added to a chemical reaction d) The result of mixing chemicals in a chemical reaction
Which of these statements best describe the law of conservation of mass proposed by Antoine Lavoisier?
a) Energy occurs in discrete amounts b) Matter can not be created or destroyed c) Energy can not be created or destroyed d) Atoms combine in fixed ratios to form compounds
Which of these types of reactions absorbs heat from the surroundings?
a) Combustion b) Endothermic c) Exothermic d) Neutralization
Milk (pH = 6) is a
a) Strong acid b) Weak acid c) Strong Base d) Weak Base
In science class, Max mixes 20 grams of water, 13 grams of acid and 7 grams of baking soda. What should be the total mass of the products? (Think law of conservation of mass)
a) 20 grams b) 40 grams c) 13 grams d) 7 grams
When a chemical ice pack is activated, the chemicals stored inside react and the pack becomes very cold. Which of these terms describes this type of reaction?
a) Endothermic b) Exothermic c) Hyperthermic d) Hypothermic
Which of these terms describes a type of chemical reactions that results in heat being released to the surroundings?
a) Endothermic b) Exothermic c) Hyperthermic d) Hypothermic
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