Refer to the activity series chart and determine which of the following displacement reactions can occur. A.
2Ag(s) + Zn(NO3)2(aq) → 2AgNO3(aq) + Zn(s)

B.
2Cu(NO3)2(aq) + 2Ag(s) → 2AgNO3(aq) + Cu(s)

C.
CuSO4(aq) + Fe(s) → FeSO4(aq) + Cu(s)

D.
3MgSO4(aq) + 2Al(s) → Al2(SO4)3(aq) + 3Mg(s)

66 A

Explanation:

8

explanation:

each principal energy level above the first contains one s orbital and three p orbitals. a set of three p orbitals, called the p sublevel, can hold a maximum of six electrons. therefore, the second level can contain a maximum of eight electrons - that is, two in the s orbital and 6 in the three p orbitals.

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explanation:

0.07 g/cm³

1.37 g/cm³