using the following data, calculate the average atomic mass of magnesium (give your answer to the nearest .01 u) : Show all work! Isotope: 1224MgPercent abundance:78.70%Isotope:1225MgPerce nt abundance:10.13%Isotope:1226MgPerce nt abundance:11.17%

How many grams of magnesium metal will react completely with 8.3 liters of 5.5 m hcl? show all of the work needed to solve this problem. mg (s) + 2hcl (aq) → mgcl2 (aq) + h2 (g)

Which of the following natural processes is most likely to support the formation of an underwater sinkhole? a pollution buildup from deposited minerals b limestone cave collapsing due to changes in sea level c erosion of large amounts of sand moved by ocean waves d oxidation of rock formed by chemical weathering

The identities of substances are the same before and after which type of change