If i have 1. 9 moles of gas held at a pressure of 5 atm and in a container with a volume of 50 liters, what is the temperature of the gas?

Did the universe cool off or get hotter as it expanded after the 'big bang"?

Which early modernism trend in art focused on prehistoric or exotic cultures? a. primitivism b. expressionism c. impressionism d. total serialism

What does the first stage of a multistage rocket do?