What is the rate constant at 25.0 ∘c based on the data collected for trial b? the following data were acquired in an iodination experiment involving acetone. all reaction times are in terms of the rate of disappearance of i2. trial 1st #-volume of 0.0010 m i2 (ml) 2nd #- volume of 0.050 m hcl(ml) 3rd #- volume of 1.0 m acetone(ml) 4th #- volume of water(ml) 5th #-temperature(∘c) 6th#-reaction time(s) a 5.0 10.0 10.0 25.0 25.0 130 b 10.0 10.0 10.0 20.0 25.0 249 c 10.0 20.0 10.0 10.0 25.0 128 d 10.0 10.0 20.0 10.0 25.0 131 e 10.0 10.0 10.0 20.0 42.4 38

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

How many moles of magnesium is 3.01 x10^22 atoms of magnesium?

Using the first volume and temperature reading on the table as v1 and t1, solve for the unknown values in the table below. remember to use the rules of significant figures when entering your numeric response.