Calculate the mass of hydrogen formed when 25 g of aluminum reacts with excess hydrochloric acid.
2A1 + 6HCI —— 2 AlCl3 + 3 H2
2.8 grams
0.92 grams
0.41 grams
1.2 grams

Astudent reacts 13 moles of iron with 21 moles of oxygen according to the following equation:

What term is applied to a scientist who studies ancient life, including animal and plant fossils a. anthropologist b. dendroclimatologist c. geophysicist d. paleontologist

Select the most likely product for this reaction: koh(aq) + co2(g) – ? k2co3(aq) + h2o(1) k(s) + h2(g) + o2(g) k(s) + co3(9) +h2