7) A molecule that contaiss thrce identil polar bonds to the central wilb A) non

Question

7) A molecule that contaiss thrce identil polar bonds to the central wilb A) nonpolar if the geometry is planar tg B) polar in all cases C) neepolar in all cases D) impossible to tell the polarity E) elther polar or nonpolar depending on the identity of the atoms tonded to the central stom 8) The formula for sulfur hexahromide A) SF6 B) SBrs C) SBra D) Silre E SiBe 9) Which of the following equations is not balanced? A)2Na + 2H2O 2NaOH + H2 B)C3H8 + 502 3CO2 + 41120 C)2H2 + O2 2H2O D)SO2 + O2 SO3 10) When the following reaction is balanced the coe fficient in front of oxygen is A) 25 B) 12 C) 18 D) 9 11) The balanced equation for the reaction between aqueous ammonium sulfate and aqueous barium acetate is A) (NH4)2SO4 (aq) + Ba(C2H3O2)2 (aq) BaSO4 (s) + NH4C2H302 (aq). B) (NH4)2 SO4 (aq) + Ba(C2H3O2)2 (aq) BaSO4 (s) + 2 NH4C2H3O2 (aq). C) NH4S04 (aq) + BaC2H3O2 (aq) BaSO4 (s) + NH4C2H3O2 (aq). D) (NH4 )2SO4 (aq) + Ba(C2H3O2)2 (aq) BaSO4 (aq) + 2 NH4C2H302 (s). E) (NH4)2S03 (aq) + Ba(C2H3O2)2 (aq) Bas03 (aq) + NH4C2H302 (aq). 12) The following reaction can be classified as what type(s) of reaction(s)? Al2(SO4)3 (s) + 6 H20 (l) 2 Al(OH)3 (aq) + 3 H2 SO4 (aq) A) precipitation B) acid-base neutralization C) redox reaction D) both A and B 13) Which reaction is not an example of a redox reaction? A)2Hg (l) + O2(g) 2Hgo (s) B) 2 (NH4);PO4 (aq) + 3 Ba(NO3)2 (aq) Ba3(PO4)2 (s) + 6 NHdNo3 (aq) C)CH4(g) + 202(g) CO2 (g) + 2H20 (g) D)6Hci (aq) +2AI (s) 2Aici3 (aq) + 3H2 (g) E)2Al2O3 (s) 4A1 (s) + 302 (g)

Explanation / Answer

Q7

three identicla polar bonds and a cnetral atom...

can't be stated, since we need to know total line pairs...

choose E

Q8

sulfur = S

hexabromide = 6 br

choose B

Q9

not balanced --> will not have same mol of atoms

a is balanced

b is balanced

c balanced

d this is not balanced, O is extra

e balanced

Q10

balance C,H,O

C8H18 + O2 = CO2 + H2O

C8H18 + O2 = 8CO2 + H2O

C8H18 + O2 = 8CO2 + 9H2O

C8H18 + 25/2O2 = 8CO2 + 9H2O

multiply by 2

2C8H18 + 25O2 = 16CO2 + 18H2O

choose 25

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