What is the correct electronic configuration of Copper?

The oxidation number of Fe in K3Fe(CN)6 is:

Calculate the [H+] in a solution that is 0.18 M in NaF and 0.25 M in HF. (Ka = 7.2 × 10–4)

How many electrons in an atom can have the quantum numbers n = 3, l = 2?

For the reaction 2A + 4B→2C + 2D, at a particular instant in time, the rate of the reaction is 0.0352 M/s. What is the rate of change of B?

Which one of the following is a redox reaction? a) 2KBr(aq) + Pb(NO3 )2 (aq) → 2KNO3 (aq) + PbBr2 (s) b) 2Al(s) + 3H2SO4 (aq) → Al2 (SO4 )3 (aq) + 3H2 (g) c) CaBr2 (aq) + H2SO4 (aq) → CaSO4 (s) + 2HBr(g) d) H+ (aq) + OH– (aq) → H2O(l)

What is the major product when 2-methylprop-1-ene is treated with HBr at room temperature?

What is the VSEPR shape of AsH3

If you have a negative entropy and a positive enthalpy, what can the Gibb's free energy be?

If n=2, what is l and ml respectively?

Which of the following would you expect to have the highest boiling point? ethanol, ethyl ethanoate, ethanoic acid, ethane, ethene, ethyne, ethanal or chloroethane?

What is the name of this compound?