Some chemical factories use the chloralkali process to make substances from brine, which is a mixture of sodium chloride (NaCl) and water (H20). In this process,
factory workers send currents of electricity through the mixture, causing sodium
hydroxide (NaOH), chlorine gas (Cl2), and hydrogen gas (H2) to form. These
substances can later be used to create other chemicals like bleach and drain cleaner.
In the chemical reaction described in the passage, which of the following are reactants?
Select all that apply.
sodium hydroxide (NaOH)
sodium chloride (NaCl)
hydrogen (H2)
water (H20)

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

How are elements arranged in a periodic table

How many moles of sulfur dioxide are produced when 4.38 moles of oxygen completely react with iron (iv) sulfide