Net ionic equation for the reaction of magnesium carbonate with nitric acid.

Identify two types of chemical bonding in the source of dietary potassium

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.

The number of moles of a given mass of a substance can be found without knowing its molecular formula or molar mass. true false