What mass of Ca(OH), must be dissolved in 0.504 L of a solution to make a 0.56 M solution? 0.28 g
21 g
1.1 g
0.90 g

Explain which group an element with the electron configuration 1s2 2s2 2p6 3s2 3p6 3d1 4s2 belongs to.

Mike and mitchell decide to have a foot race. they mark off a stretch of 100 yards, and recruit cindy to work the stopwatch. after running the race and looking at the results, cindy declared that mitchell was the fastest. so how did the boys times compare?

What is the oxidation state of each individual carbon atom in c2o42−?