Calculate the following to four significant figures:
(a) the percent composition of ammonia, nh3
(b) the percent composition of photographic "hypo," na2s2o3
(c) the percent of calcium ion in ca3(po4)2

Suppose you have designed a new thermometer called the x thermometer. on the x scale the boiling point of water is 129 ? x and the freezing point of water is 13 ? x. part a at what temperature are the readings on the fahrenheit and x thermometers the same?

What are four significant sources of ghgs that come from wostem washington?

State one important difference between a physical change and a chemical change?