Viết cấu hình electron của các nguyên tử X biết số lượng tử của electron cuối cùng như sau : n=4 , l=0 , ml=0 , ms=+1/2

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

Chromosome 17 is made of over million base pairs.

Sum of brother and sisters age is 26. four times the brothers age is subtracted from three times the sisters age, the difference is 8. what are the ages of the brother and sister?