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Giulio M
Lv 5
Giulio M asked in Science & MathematicsChemistry · 1 decade ago

Chemistry help?

I'd appreciate it if someone could answer these 2 quesions. Thanks..

1.Which of the following is one possible form of pentane?

A) CH3CH2CH2CH2CH3

B) CH3CH=CHCH2CH3

C) CH3CH2-O-CH2CH2CH3

D) CH3CH2CH2CH2CH2CH3

E) CH3CH2CH2CH2CH2NH2

2. Calculate the molar mass for Mg(ClO4)2.

4 Answers

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  • lenpol7
    Lv 7
    1 decade ago
    Favourite answer

    1.

    a) . Pentane

    b). Pent-2-ene

    c). Ethyl Propyl Ether

    d). Hexane

    e). 1-Aminopentane

    2.

    Mg x 1 = 24 x 1 = 24

    Cl x 2 = 35.5 x 2 = 71

    O x 8 = 16 x 8 = 128

    24 + 71 + 128 = 223 (Mr Mg(ClO4)2

    Moles = mass(g)/Mr

    1 mole = 223g/223

    So molar mass is 223g.

  • ANT-a-gonistic
    1 decade ago

    1)A-pentane has five carbons and each may only form four bonds. a doble bond indicates an alkene (B), an oxygen in the middle of the molecule makes it an ether (C), (D) has six carbons (hexane) and (E) has an amine group, NH2, which would need a different name.

    2)molecular weight of Mg+molecular weight of 2 Cl's+ molecular weight of 8 O's=total molecular weight of the compound.

  • lolzpwndxasaurusrex111
    1 decade ago

    1) A

    2) 228.2 g/mol

  • skipper
    Lv 7
    1 decade ago

    1. A

    2. 223.2

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