Answers: 1
Chemistry, 21.06.2019 22:50
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 05:50
What happens when the temperature of a solution increases?
Answers: 2
Chemistry, 23.06.2019 01:40
Calcium carbonate decomposes at high temperatures to give calcium oxide and carbon dioxide as shown below. caco3(s) cao(s) + co2(g) the kp for this reaction is 1.16 at 800°c. a 5.00 l vessel containing 10.0 g of caco3(s) was evacuated to remove the air, sealed, and then heated to 800°c. ignoring the volume occupied by the solid, what will be the mass of the solid in the vessel once equilibrium is reached?
Answers: 1
A scientist wants to make a solution of tribasic sodium phosphate, Na3PO4Na3PO4, for a laboratory ex...
Mathematics, 15.10.2019 13:30
Mathematics, 15.10.2019 13:30
Social Studies, 15.10.2019 13:30
Mathematics, 15.10.2019 13:30
Social Studies, 15.10.2019 13:30
Mathematics, 15.10.2019 13:30
Mathematics, 15.10.2019 13:30
Mathematics, 15.10.2019 13:30
History, 15.10.2019 13:30