Part 1: Calculate the mass percent (m/m) of a solution prepared by dissolving 49.53 g of NaCl in 162.7 g of H2O. Express your answer to four significant figures. Part 2: Vinegar is a solution of acetic acid in water. If a 285 mL bottle of distilled vinegar contains 28.0 mL of acetic acid, what is the volume percent (v/v) of the solution? Express your answer to three significant figures.

Part 3: Calculate the mass/volume percent (m/v) of 18.5 g NaCl in 59.5 mL of solution.
Express your answer to three significant figures.

Part 4: Calculate the molarity (M) of 159.8 g of H2SO4 in 1.030 L of solution.
Express your answer to four significant figures.

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

What will most likely happen when two bromine atoms bond together?

Na chemical reaction, activation energy increases the of the reactants. this outcome causes the particles to collide, which results in the of new products.