Which of these chemical formulas is incorrect, and why?
A. Mgs, because the net charge is not zero
B. cina because the nonmetal symbol should be
second
C. Naf, because a metal and nonmetal CANNOT form
an ionic compound
D. BeCl2, because the net charge is zero

How do i complete this electrolysis of water lab? i’m at home, so i don’t have the materials, and the lab didn’t properly work and was incomplete at school.

The number to the right of an element's symbol (ex. c-12) identifies the of an isotope.

Phosphoric acid is a triprotic acid ( =6.9×10−3 , =6.2×10−8 , and =4.8×10−13 ). to find the ph of a buffer composed of h2po−4(aq) and hpo2−4(aq) , which p value should be used in the henderson–hasselbalch equation? p k a1 = 2.16 p k a2 = 7.21 p k a3 = 12.32 calculate the ph of a buffer solution obtained by dissolving 18.0 18.0 g of kh2po4(s) kh 2 po 4 ( s ) and 33.0 33.0 g of na2hpo4(s) na 2 hpo 4 ( s ) in water and then diluting to 1.00 l.