Question

chemistry quiz #2 - physical and chemical pro... 0:09:07 elapsed combining hydrogen and oxygen to make water is a physical change true false question 10 (1 point) breaking up concrete with a hammer is a physical change true false question 11 (1 point) sand being washed out to sea from the beach is a chemical change true false question 12 (1 point) when ice cream melts, a chemical change has occured true false question 13 (1 point) acid rain damaging/rusting a marble statue is a physical change true false

Explanation:

• Combining hydrogen and oxygen to make water is a chemical change as a new substance (water) is formed with different chemical properties. So the answer to the first - question is False.
• Breaking up concrete with a hammer only changes the physical form of the concrete without altering its chemical composition, so it is a physical change (True).
• Sand being washed out to sea from the beach is a physical change as there is no change in the chemical nature of sand, just a change in its location (False).
• When ice - cream melts, it changes from solid to liquid but its chemical composition remains the same, so it is a physical change (False).
• Acid rain damaging/rusting a marble statue is a chemical change as the acid in the rain reacts chemically with the calcium carbonate in the marble to form new substances. So it is False.

Answer:

False
True
False
False
False