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

In science class richard learns that a substance has a boiling point of 230 fahrenheit his teacher ask him to convert this temperature to degrees celsius what is the boiling point of his substance in degrees celsius