Inorganic Chemistry Answers

I wish to know how to calculate the Enthalpy change for the reaction POCL3.

Thank you.

H3PO4+Ba(OH)2->Ba3+(PO4)2+H2O
The big #s are saposed to be sub #s and its a Limited reactant problem

Li + N2 → Li3N
how do you balance this equation?

Glycolic acid which is a monoprotic acid and a constituent in sugar has a pka of 3.9. A 25 ml solution of glycolic acid is tritrated to the stoichiometric point with 35.8 ml of 0.020 M sodium hydroxide solution. What is the ph of the resulting solution at the stoichiometric point?

Calculate the fluoride ion concentration and pH of a solution that is 0.20 M in
HF and 0.10 M in HCl

calculate the number of molecules and number of atoms present in 5.60l of ozone at n.t.p

A balloon is filled to 0.5 L at STP with helium. If the balloon is placed into a vacuum refrigerator at 500 torr and -40 C, what will the new volume be?

What is the density of 5 moles of argon at 790 torr and 75 F?

At STP, 50 mL of isopropanol (C3H7OH, density: 0.786 g/mL) is combusted in the presence of 2 L O2. Which starting material remains after the reaction and what is the remaining volume?

1.Nitrogen and phosphorus have in the outer layer: (what is the correct answer)
a) 1 e- b)3e- c) 5 e- d) 7e-

2.Nitrogen is part of the period : (what is the correct answer)
a) 1 b)2 c)3 d)4

3. Nitrogen and phosphorus show: (what is the correct answer)
a)similar chemical peculiarity
b)different chemical peculiarity
c)the same chemical peculiarity
d)amphotere peculiarity