Which salt solution is more concentrated, solution a, which contains 18g of salt in 6l of water, or solution b, which contains 24g of salt in 12l of water? explain?

Who is better, messi or cristiano, i need this for a chemistry class. asap

What is the formula for the compound dinitrogen pentoxide? a. n4o5 b. n5o4 c. n4o6 d. n5o2 e. n2o5

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