In the chemical reaction below, calcium metal and water react to form calcium hydroxide and hydrogen gas. calcium metal + water → calcium hydroxide + hydrogen gas calcium and water are the reactants in this chemical reaction, whereas calcium hydroxide and hydrogen gas are the products that are formed. once the reaction reaches completion a. the products of the reaction will have changed back into the reactants. b. the total mass of the products will be less than the original mass of the reactants. c. the total mass of the products will be greater than the original mass of the reactants. d. the total mass of the products will be equal to the original mass of the reactants.

In a laboratory experiment, a fermenting aqueous solution of glucose and yeast produces carbon dioxide gas and ethanol. the solution was heated by burning natural gas in a bunsen burner to distill the ethanol that formed in the flask. during the distillation, the ethanol evaporated and then condensed in the receiving flask. the flame of the burner was kept too close to the bottom of the flask and some of the glucose decomposed into a black carbon deposit on the inside of the flask. during this experiment the following changes occurred. which of these changes involved a physical change and not a chemical change? check all that apply. 1-condensation of ethanol 2-evaporation of ethanol 3- formation of carbon dioxide gas from glucose burning of natural gas 4-formation of ethanol from glucose by yeast 5-formation of a carbon deposit inside the flask

If i make a solution by adding 83grams of sodium hydroxide to 750ml i’d water what is the molarity of sodium hydroxide

When the water vapor cools it condenses select a number that represents his process on the