A system of gas is at a pressure of 2.50 atmospheres and a volume of 75.0 milliliters. What is the pressure of the gas if the volume increases 125 milliliters?

Ok so co(g) is not pronoused that. the only clue is that youpronouse it the oppisote way. 

Answerit curves up and levels out.explanationwe assume that the container contains absolutely no ammonia to begin with as it states that "nitrogen gas and hydrogen gas" react to "produce ammonia."at dynamic equilibrium, the product and reactant concentrations are equal.this means that, starting from a concentration of zero, [nh₃] must curve "up" from zero and then level out to a constant concentration.

The answer to your question would be c. mineral oil  

C, small, hard spheres with insignificant volumes