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Chemistry, 21.06.2019 22:50, rndschopplein
Achemical reaction (also known as a chemical change) produces substances that are chemically different from the starting materials. an example of a chemical reaction is the formation of water from hydrogen and oxygen gas. in a physical change, a substance changes its physical appearance but not its chemical identity. an example of physical change is the formation of liquid water from solid water, a familiar process called melting. physically, liquid water looks very different from solid water (ice) but the chemical identity, water, is the same for both. which of following changes that affect the composition of our atmosphere involve physical changes and which involve chemical reactions? oxygen gas changes to ozone during thunderstorms carbon dioxide is produced by the combustion of gasoline in an automobile engine. when coal, oil, and natural gas are decomposed in landsills they produce methane gas. freezing rain develops when a warm air mass overrides a cold air mass. fog forms from water vapor when the temperature drops below the dew point
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Chemistry, 22.06.2019 01:00, deidaralove90
Look at the bean data from days 4β6. use these data to explain how natural selection changed the number of dark red walking beans over time. writing part
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Chemistry, 22.06.2019 03:40, kellypechacekoyc1b3
Chemical kinetics what was the rate of reaction in trial 3? choose the closest answer.
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Chemistry, 22.06.2019 06:30, yolo123321
The following reaction shows sodium carbonate reacting with calcium hydroxide. na2co3 + ca(oh)2 β naoh + caco3 how many grams of naoh are produced from 20.0 grams of na2co3? (molar mass of na = 22.989 g/mol, c = 12.01 g/mol, o = 15.999 g/mol, ca = 40.078 g/mol, h = 1.008 g/mol) 12.2 grams 15.1 grams 24.4 grams 30.2 grams
Answers: 2
How many grams are contained in the quantity 0.34 mol Ca...
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