Chemistry, 01.07.2019 21:00, irvinanderson
What answers below correctly identifies the type of change and explanation for the mixture of calcium carbonate and hydrochloride acid
Answers: 1
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
Answers: 1
Chemistry, 22.06.2019 11:30, claudr03
If we compare and contrast electromagnetic waves with sound waves, all but one statement is true. that is a) sound waves require a medium to travel while electromagnetic waves do not. b) electromagnetic waves can travel through the vacuum of space while sound waves cannot. c) electromagnetic waves must have a medium in which to travel, but sound waves can travel anywhere. eliminate d) sound waves must bounce off of matter in order to travel while electromagnetic waves do not require matter to be present.
Answers: 3
Chemistry, 22.06.2019 16:00, anaalashay
How will the volume of a gas be affected if the pressure is tripled, but the temperature remains the same?
Answers: 3
What answers below correctly identifies the type of change and explanation for the mixture of calciu...
Mathematics, 21.03.2021 22:30
Mathematics, 21.03.2021 22:30
Chemistry, 21.03.2021 22:30
Social Studies, 21.03.2021 22:30
Mathematics, 21.03.2021 22:30
English, 21.03.2021 22:30
World Languages, 21.03.2021 22:40