I have the answers to these questions, but I need help figuring them out.
1.) I know Na+ has the same electron configuration as neon, but I don't understand why. does it have to do with the +?
2.) what is the oxidation state of chromium in the compound potassium dichromate K2Cr2O7? (Answer= +6)
3.) An aqueous solution with pH 5 at 25 degrees C has a hydroxide ion concentration of... (Answer= 1 X 10^-9 molar)
4.) A compound with a molecular weight of 56u has an empirical formula of CH2. What is its molecular formula (Answer= C4H8)
5.) I think I know how to do this problem but I can't figure out how to balance the equation ==> What volume of 0.4 M Ba(OH02 is needed to exactly neutralize 100 mL of 0.2 M HBr?
Sorry there was a lot. Thanks for helping!
1.) I know Na+ has the same electron configuration as neon, but I don't understand why. does it have to do with the +?
2.) what is the oxidation state of chromium in the compound potassium dichromate K2Cr2O7? (Answer= +6)
3.) An aqueous solution with pH 5 at 25 degrees C has a hydroxide ion concentration of... (Answer= 1 X 10^-9 molar)
4.) A compound with a molecular weight of 56u has an empirical formula of CH2. What is its molecular formula (Answer= C4H8)
5.) I think I know how to do this problem but I can't figure out how to balance the equation ==> What volume of 0.4 M Ba(OH02 is needed to exactly neutralize 100 mL of 0.2 M HBr?
Sorry there was a lot. Thanks for helping!