Liquid méthyl ethyl ketone (mek) is introduced into a vessel containing air the system temperature is increased to 55 0, and the vessel contents reach equilibrium with some mek remaining in the liquid state. the equilibrium pressure is 1200 mm hg (a) use the gibbs phase rule to determine how many degrees of freedom exist for the system at equilibrium. state the meaning of your result in your own words. (b) mixtures of mek vapor and air that contain between 1.8 mole% mekand 11.5 mole% mek ignite and burn explosively if exposed to a flame or spark. determine whether or not the given vessel constitutes an explosion hazard

The answer is yes b ffgnbsfgnbnfgbnfgsnb

The density of water is 1 g/cm cubed and in order for the pebble to sink its density has to be greater than the density of water and in order for the twig to float its density has to be less than the density of water

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. 

Ithink that’s it’s b