100 g of phosphoric acid is reacted with excess potassium hydroxide. The final mass of K2HP04 produced is found to be 163 g. what is the percent yield ?

Which type of bonding involves the complete transfer of a valence electron from a less electrogrative atom to a more electronegative one

Write the empirical chemical formula of calcium with a mass percent of 38.8, phosphorus with a mass percent of 20.0, and oxygen with a mass percent of 41.3.

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.