1. Suppose you have a one gram sample of potassium Suppose a meteorite is found in the earth near your home and you are invited to help a scientist determine its age. The meteorite has 12.5% potassium-40 as compared to a similar newly formed meteor. How old is the meteorite? 2. Use the age of the meteorite you calculated in the previous question to determine how much uranium-235 was in the meteorite when it formed if it currently has 3.50 grams of U-235.

Darla claims that the first periodic table developed by mendeleev was not completely accurate, so it is not useful at all. harmony argues that it establish the periodic table we use today, making it more credible. who is correct and why? darla is correct, because a model that has any mistakes should be thrown out. darla is correct, because a good model would not need to change. harmony is correct, because mendeleev’s model had all of the information correct in the first version. harmony is correct, because mendeleev’s model made predictions that came true.

Which of the following is true about a carbonated soft drink? . the carbon dioxide is the solvent, and water is the solute.. the water is the solution, and carbon dioxide is the solvent.. the carbon dioxide is the solution, and the water is the solvent.. the water is the solvent, and the carbon dioxide is the solute.. .

Identify the correct mole ratio for each substance. sodium chloride (nacl) na: cl = 1: ammonium nitrate (nhno) h: o = 4: