Contractile proteins are found in a_eggs b_feathers c_muscles d_seeds

What is the ph of a solution that has a hydrogen ion concentration of 1.0 * 10 -9 m?

Ammonium perchlorate nh4clo4 is the solid rocket fuel used by the u.s. space shuttle. it reacts with itself to produce nitrogen gas n2 , chlorine gas cl2 , oxygen gas o2 , water h2o , and a great deal of energy. what mass of nitrogen gas is produced by the reaction of 2.1g of ammonium perchlorate?

What mass of glucose is produced when 54g of water react with carbon dioxide