What is 40% hydrogen 40% oxygen 20% magnesium ratio?

Stage in which a typical star has completely stopped fusion

Select all that apply. using a value of ksp = 1.8 x 10-2 for the reaction pbcl2 (s) pb+2(aq) + 2cl -(aq). the concentration of the products yield a ksp of 2.1 x 10-2:

Avogradoa number was calculated by determining the number of atoms in?