One hypothesis regarding earth's early atmosphere, includes this carbon-based gas along with ammonia, free hydrogen, and carbon dioxide

True

Explanation:

Earlier earth atmosphere was devoid of any oxygen gas, it was later when the evolution of cyanobacteria took place that gave off atmospheric oxygen as the earlier atmosphere was captured by solar nebula mostly of helium and hydrogen gases. Later on, the earth released volatile gases as the development of volcanicity. Hense a greenhouse rich atmosphere but poor in oxygen, as the earlier formation of air was these carbon-based gases and along with ammonia and free hydrogen. The atmosphere was nitrogen carbon and smaller amounts f gas.  Some models predict that the earth would have been made up of ice. carbon dioxide produced due to volcanic eruptions and methane due to organisms but got quickly destroyed by solar radiation some 4.4 Ga years ago.

Adozen is 12, and your needing to calculate the weight of one medium egg, so i would do 21/12=1.75 per egg, and check your answer by doing 1.75 * 12= 21 : ) : ): ): ): ) i hoped i

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.