题目内容

Which set of three quantum numbers does not specify an orbital in the hydrogen atom? ( )

A. n = 2; l = 1; ml = -1
B. n = 3; l = 3; ml = -2
C. n = 2; l = 0; ml = 0
D. n = 3; l = 2; ml = 2

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Which should have the largest difference between the first and second ionization energy? ( )

Al
B. Si
C. P
D. Cl

Which molecule is nonlinear? ( )

A. SO2
B. CO2
C. HCN
D. NO

Calculate the molarity of a solution of 0.556 g PbCl2 in 125 mL of solution. Atomic mass: Pb = 207.2, Cl = 35.5 ( )

A. 4.45 M
B. 0.0160 M
C. 4.45 g/L
D. 1.60 x 10-5 M

Which pair of reactants would you use to prepare manganese() sulfide by a reaction between ions in solution? ( )

A. MnSO4 and ZnS
B. MnCO3 and Na2S
C. MnCl2 and Na2S
D. MnCl2 and Na2SO4

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