Explain why blood type and rh factor are checked before a transfusion.

(apex) when a cup of water is dropped, as the cup falls, the water in the cup falls out true or false?

What diagram shows the ionic compound of magnesium oxide

If a solution is considered basic, then a) the hydroxide ion and hydronium ion concentrations are equal. b) the hydroxide ion concentration is less than the hydronium ion concentration. c) the hydronium ion concentration is greater than the hydroxide ion concentration. d) the hydroxide ion concentration is greater than the hydronium ion concentration.