! im in desperate need! too hard for me to answer. the solvay process for the manufacture of sodium carbonate begins by passing ammonia and carbon dioxide through a solution of sodium chloride to
make sodium bicarbonate and ammonium chloride. the equation for this reaction is
h2o + nacl + nh3 + co2 + nh4cl + nahco3
in the next step, sodium bicarbonate is heated to give sodium carbonate and two gases, carbon dioxide and steam.
2nahco3 → na2co3 + co2 + h20
what is the theoretical yield of sodium carbonate, expressed in grams, if 120.0 g of nacl were used in the first reaction?
if 85.40 g of na2co3 was obtained, what was the percentage yield?

pure water does not conduct electricity very well. however, when certain substances are dissolved in water, the solution does conduct electricity. you can make a simple device that shows how well a solution conducts electricity. this device uses a flashlight bulb to indicate how well the solution conducts electricity. the better the solution conducts electricity, the brighter the bulb will glow.

explanation:

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the answer is:  

line graphs show patterns in data with variables that change over time; whereas, circle graphs show data as parts out of a whole (such as out of 100%).

each chemical family is represented as a group or column on the periodic table. based on chemical properties, there are 6 types of chemical families. group 1 represents alkali metals, group 2 represents alkaline earth metals, groups 3 to 12 represent transition metals, groups 13 to 16 represent non-metals and other metals, group 17 represents halogens and group 18 represents noble gases.