What temperature would a solution need to be to be to dissolve 110kg of solute

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.

Estimate the molar mass of the gas that effuses at 1.6 times the effusion rate of carbon dioxide.

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