Write an equation that states the relationship between the two given units, and then write the conversion factor(or conversion factors) that could be used to convert the first unit to the second. Example:Millimeters and meters are related by the equation 1000mm=1m. The conversion factor 1m/1000mm should be used. A. Grams and milligrams
B. Nanometers and meters
C. Kilograms and grams
D. Liters and milliliters
E. Megahertz and hertz
PLEASE PLEASE HELP ASAP

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

Which of the following best supports the concept that genetic information is passed on to offspring from both of their parents, not just one?

The empirical formula of a compound is ch2o and its mass is 120 amu/molecule, what is its formula?