A sample of nitrogen gas whose volume at 126 Kis 345.0mL, is heated at a pressure of 60.0mmHg until the volume becomes 400.0mL. What is the final degree Celsius temperature of the gas if the pressure is decreased to 30.0mmHg?

The answer is letter c

The independent variable is the type of music.the dependent variable is the pulse rate.the intervening variable is the age of the subject.if the mother does not like rock, her pulse is likely to not increase.the same might be true for the sister.the friend may like rap and gets excited.to establish cause/effect relationship, all of the subjects must be consistent.hope i .