Why must the reaction mixture be cooled before water is added to precipitate the product?

Elements in group 2 are all called alkaline earth metals. what is most similar about the alkaline earth metals?

Reduction is a reaction which results in a in electrons and a in positive charge of the atom or ion 1) a- loss 1) b- gain 2) a-increase 2) b-decrease

Amedication is given at a dosage of 3.000 mg of medication per kg of body weight. if 0.1500 g of medication is given, then what was the patient's weight in pounds (lbs)? there are 453.59g in 1 lb.