Based on the half-life of 87Rb, record the time (in billions of years) and the percentage of parent isotopes remaining after 4 half-lives. I need to be able to graph the data for the predicted time (x-axis) versus the percent of parent isotope remaining (y-axis). thanks in advance

c. heat could easily travel through the molecules in the air and escape/enter the flask. removing the air slows down the heat transfer.  

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what does the table look like

because natural gas is colorless, odorless, and tasteless, distributors add mercaptan (a chemical that smells like sulfur) to give natural gas a distinct unpleasant odor (it smells like rotten eggs). they locate the types of rock that are likely to contain natural gas deposits.