Silver's weighted average atomic mass is 107.86, leading one to assume that its most abundant isotope would be silver-108 (or 108ag). silver does have two naturally occurring isotopes, but 108ag is not one of them. which of the following best explains this phenomenon?

a) when one is determining atomic masses in the laboratory, a significant amount of experimental error occurs.
b) when the two isotopes of silver experience radioactive decay, their most abundant end product is silver-108.
c) although silver-108 is not naturally occurring, it is synthetically created in large quantities to meet consumer demands.
d) the two silver isotopes have atomic masses of approximately 107 and 109 and are found in similar abundance in nature.

Isotopes are forms of the same elements that contain equal number of protons but different number of neutrons in their nucleus. The two silver isotopes have atomic masses of approximately 107 and 109 and are found in similar abundance in nature. The correct option is D. There are two stable isotopes of silver with atomic number 107 and 109 and abundance of 51.84% and 48.16%. 

The answer to your question really depends on three things: how much water you have, how cold it is to start out, and how cold the things around it are. water actually freezes when it gets to 32 degrees fahrenheit (0 degrees celsius), but the time it takes to get there may be different.  let's start with the first. if you take two glasses, and fill one with a tiny bit of water, and the other about halfway, then put them both in the freezer, the one with less water will freeze first (you can try this at home, but i recommend using plastic cups and not glass ones).  now let's move on to the second part. let's say you have two glasses, and you fill one with really cold water that has been in the refrigerator, and the other with really hot water from the sink. if you put both of them in the freezer, the one that started out colder will freeze first.  for the third part, let's imagine that you have two glasses with the same amount of water in them, and the water is at the same temperature. imagine putting one outside on a really really cold day in georgia, and having a friend in alaska put one outside on the same day. since it would be so much colder in alaska, the glass of water there would freeze before yours.  so, if you took a tiny bit of really cold water in a glass, and put it outside on a cold day in alaska, it would freeze a lot faster than a big glass of hot water outside on a cold day in georgia.