A pressure cooker contains 0.355 mole of air, which occupies a volume of 5.68 liters. The temperature inside the pressure cooker is 394 K. What is the absolute pressure of the air in the pressure cooker? The pressure of the air is_ pascals. Express you answer to three significant figures.

We will use ideal gas equation in this problem

PV = nRT

Where

P = pressure of gas or air = ?

V = volume of air = volume of pressure cooker = 5.68 L

T = temperature = 394 K

n = moles of air = 0.355

R = ideal gas equation = 0.0821 L atm / mol K

Putting values

Pressure = nRT / V = 0.355 X 0.0821 X 394 / 5.68 = 2.02 atm.

your answer is c) plasma

~*"auba14"*~

chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. these processes are called chemical reactions and, in general, are not reversible except by further chemical reactions. some reactions produce heat and are called exothermic reactions and others may require heat to enable the reaction to occur, which are called endothermic reactions. understanding chemical changes is a major part of the science of chemistry.