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(apex) when a cup of water is dropped, as the cup falls, the water in the cup falls out true or false?

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.

How many grams of magnesium metal will react completely with 8.3 liters of 5.5m hcl? show all work