What are the oxidation numbers of the atoms in this reaction? check all that apply. mg(s) + 2hcl(aq) → mgcl2(aq) + h2(g) 0 for mg in mg and mgcl2 0 for mg(s) and h in h2 +1 for h in hcl -1 for cl in hcl +2 for mg in mgcl2

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

Calculate the number of moles of ethane in 100 grams

How does the principle of electromagnetism explain the interaction between earth’s magnetic field and the solar wind?