One afternoon, a man painted his house brown. Two days later, however, the house caught fire and burned down. What two changes occurred to the house?
The painting was a physical change and the burning was a chemical change
Both painting and burning were physical changes
Neither physical nor chemical changes occurred
The painting was a chemical change and the burning was a physical change
Answers: 2
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Choose all the answers that apply. ionic compounds dissolve easily in water do not dissolve in water have low melting points have high melting points conduct electricity when melted
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What is the mass defect of a mole of nuclei with 1.8 x 10^15 j/mol binding energy?
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What is the percent composition of ca(oh)2? 37.7% ca, 53.0% o, and 10.3% h 45.5% ca, 38.2% o, and 16.3% h 54.0% ca, 43.0% o, and 2.7% h 64.7% ca, 27.0% o, and 8.3% h
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One afternoon, a man painted his house brown. Two days later, however, the house caught fire and bur...
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