How much concentrated 12.0 M sulfuric acid [H2SO4 ] is needed to prepare 220 ml of a 6.00 M solution?

Ineed this asap part i: scientific method what is the difference between science and pseudoscience? what is the scientific method?

Suppose that some of the compound spilled out of the crucible after it was heated. would that cause the percent by mass of water in the compound determined by the experiment to be too low, too high, or unchanged? briefly explain your answer.

Match the formula for the following compound:   magnesium sulfate heptahydratemgs·7h2omg2so4·7h2omg(s o4)2·7h2omgso4·7h2o