Which of the following acts as a bronsteslowry acid but not as a bronsted lowry base

a.) nh3 (aq)
b.) h2o (1)
c.) h2co3(aq)
d.) hcio4(aq)

The element that has the greatest electronegativity is

Ineed ! i have no clue how to do this problem.

An animal cell loses the ability to convert energy stored in food to energy that the cell can use. which of the cell's organelles has stopped working? a.the mitochondria b.the nucleus c.the vacuoles d.the endoplasmic reticulum