7.5 grams of sodium is heated on a hot plate. If the temperature of the sodium increases from 22.0 °C to 35.0 °C, how much heat does the sodium absorb?

Find the protons, electrons and neutrons for strontium with a mass of 83

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Which of the following is an example of physical change not a chemical change? a) a log gives off heat and light as it burns. b) a tree stores energy from the sun in its fruit. c) a penny lost in the grass slowly changes color. d) a water pipe freezes and cracks on a cold night.