Calculate the percent composition of ammonia NH3

Match the following items. 1. high-intensity bundle of energy being emitted from some decaying nuclei gamma ray 2. particle radiating from the nucleus of some atoms beta particle 3. negative particle identical to an electron but radiating from a decaying nucleus alpha particle

The reaction q+r2=r2q is found to be first order in r2 and

Significant figures are digits read directly from the measuring instrument plus one more digit, which is __ by the observer.