Which of the following functions as a form of insulation and long term energy storage? a. carbohydrates b. nucleic acids c. lipids d. proteins

In the lab, ammonia was mixed with water to form ammonium hydroxide. what is/are the reactant(s)? o water and ammonia o ammonia o ammonium hydroxide need

The number to the right of an element's symbol (ex. c-12) identifies the of an isotope.

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.