Abox with a volume of 11.2 l contains 1.0 mol of nitrogen and 2.0 mol of hydrogen at 0°c which of the following statements is true?
r = 8.31 kpa x l/mol x k, pv = nrt

a. the partial pressures of n₂ and h₂ are equal.
b. the partial pressure of n₂ is 202 kpa.
c. the total pressure is 303 kpa.
d. the total pressure in the box is 202 kpa.

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 .