How many mL of stock NH3 is needed to make 100.0 mL of 1.00 M NH3 if your stock solution is 14.8 M

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

An electron moved from shell n = 2 to shell n = 1. what most likely happened during the transition? a fraction of a photon was added. a photon of energy was absorbed. a fraction of a photon was removed. a photon of energy was released.

This chart lists four kinds of polymers and their sources. what can be known about all four polymers, despite their differences? they come from living things. they share ionic carbon bonds. they are at least 100 monomers long. they are made of repeating subunits.