In the reaction h2co3 (aq) + 2nh3 (aq) ? 2nh4+ (aq) + co32– (aq), which substance is reduced? a. h2co3 b. nh3 c. nh4 d. co3 e. none of the above (this is not a redox reaction.)

Scientists often deal with numbers that are either very large or very small. for example, the radius of the sun is approximately 696,000 kilometers, while bacterial cells are as small as 1.9 × 10-4 millimeters. express each of these numbers in an alternate form.