What is the molar mass of the following compound: Mg2Ba?

Which best describes why nh4+ can form an ionic bond with ci-?

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.

Table sugar completely dissolved in water is an example of a?