You've made the hypothesis that the less rainfall a cactus plant gets, the taller it will grow, since cactuses like dry conditions. what is one thing that you should control in an experiment designed to test this hypothesis? a. the height of the cactus plant b. the hours of sunlight the cactus plants get c. the number of cactus plants in the experiment d. the amount of rain falling on the cactus plants

Can someone me with questions 12 and 13 plz.

The following reaction shows the products when sulfuric acid and aluminum hydroxide react. al(oh)3 + h2so4 → al2(so4)3 + h2o the table shows the calculated amounts of reactants and products when the reaction was conducted in a laboratory. sulfuric acid aluminum hydroxide initial amount of reactant 40 g 15 g theoretical yield of water from reactant 14.69 g 10.38 g what is the approximate amount of the leftover reactant? 11.73 g of sulfuric acid 10.33 g of sulfuric acid 11.12 g of aluminum hydroxide 13.67 g of aluminum hydroxide

What is the molar mass of potassium nitrate, kno3