The chemical symbol for the element calcium is Ca. What would be the symbol representing calcium atoms that have lost two electrons? Ca–
Ca+
Ca–2
Ca+2

Consider the reaction: n2(g) + o2(g) ⇄ 2no(g) kc = 0.10 at 2000oc starting with initial concentrations of 0.040 mol/l of n2 and 0.040 mol/l of o2, calculate the equilibrium concentration of no in mol/l how would this be done?

How many moles of potassium hydroxide are needed to completely react with 2.94 moles of aluminum sulfate

Oil rich countries in the middle east cover about 4% of earths total land area but prossess about 48% of the worlds known oil reserves what is the main reason for high concentration of reserves in this part of the world