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 03:20
What is the ima of the 1 st class lever in the graphic given? 2 3 0.5
Answers: 1
Chemistry, 22.06.2019 10:30
Astudent reacts 13 moles of iron with 21 moles of oxygen according to the following equation:
Answers: 2
Chemistry, 22.06.2019 16:00
As changes in energy levels of electrons increase, the frequencies of atomic line spectra they emit
Answers: 2
45.0 g of oxygen gas are diluted with 55.0 g of nitrogen gas in a 88.0 L. Calculate the % (m/V) of o...
Mathematics, 23.02.2020 05:51
Mathematics, 23.02.2020 05:51
Arts, 23.02.2020 05:51
Business, 23.02.2020 05:52
History, 23.02.2020 05:54
Mathematics, 23.02.2020 05:54
Mathematics, 23.02.2020 05:54