A radioactive sample decays to 5.75 g in 28 minutes. If the half-life is 7 minutes, how much was in the original sample?

Using complete sentences, explain how to predict the products and balance the reaction between sulfuric acid and potassium hydroxide.

How many miles of water are produced if 5.43 mol pbo2 are consumed

Which of the following changes will decrease the total amount of gaseous solute able to be dissolved in a liter of liquid water? (2 points) decreasing temperature decreasing pressure decreasing surface area decreasing solute concentration