I need this it's do 2morrow

Find the number of grams of hcl needed to react completely with .50 moles of magnesium.

Which rate indicates the number of children that would be born per woman if she were to live to the end of her child bearing years

Question 3(multiple choice worth 4 points) (04.04 lc) what does it mean when an element is reduced? it empties a valance shell, reducing its atomic radius. it gains electrons, reducing its overall charge. it increases electronegativity, reducing its ability to bond. it loses electrons, reducing its electron number.