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1. Which of the following is a strong acid?

a) HI

b) HF

c) H3PO4

d) H2CO3

e) HClO2

2. Which of the following is a weak acid?

a) HI

b) HCl

c) H3PO4

d) HNO3

e) HClO4

#1 is hydroionic acid (HI)
#2 is phosphoric acid (H3PO4)

A weak acid is an acid that partially dissociates into its ions in an aqueous solution or water. In contrast, a strong acid fully dissociates into its ions in water.

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 .