The amount of a radioactive isotope present in a certain sample at time t is given by A(t)=800 - 0.02837t grams, where t years is the time since the initial amount was measured. How long will it take for the amount of the isotope to equal 516 grams.​

Calculate the mass of carbon in 97.0 g of sucrose c12h22o11

What is the most important factor in determining climates.

Some liquids can be distilled, but only at temperatures that are so high that it is impractical, or so high the compound decomposes. explain why distillation such compounds at significantly less than atmospheric pressure (some degree of vacuum) would solve this problem.