Which hydrocarbon is an unsaturated hydrocarbon? a. 2-methylheptane b. 3-ethylpentane c. 1-hexene d. cyclopentane

- C) 1-hexene

Solution:-  There are two types of hydrocarbons, saturated and unsaturated. Saturated hydrocarbons are those having with all single covalent bonds between carbons. The suffix -ane is used for naming these compounds. For example ethane, propane etc. Unsaturated hydrocarbons are those having with double or triple covalent bonds between carbons. There might be one or more multiple bonds. The suffix used for naming hydrocarbons having double bonds is -ene (examples:- Ethene, propene, butene etc) and for triple bonds it is -yne(examples:- . Ethyne, Propyne, 1-Butyne etc)

The first given name is 2-methylheptane. Here the ending is -ane means all single bonds between carbons and so it is saturated hydrocarbon.

Second given name is 3-ethylpentane. Here also, the ending is -ane means it is also saturated hydrocarbon. Third given name is 1-hexene. Here, the ending is -ene means double bond between two carbons(first and second carbons) so it is unsaturated hydrocarbon. Fourth given name is cyclopentane. Here, the ending is -ane and so it is saturated hydrocarbon.

So, the only correct choice is C) 1-hexene.

the grams   of   barium that   are in   2.3 x 10^23   atoms of barium   is   52.4 g (answer c)

    calculation

mass = moles   of ba   x molar   mass of ba

  molar mass of ba from periodic table=   137.3 g/mol

  use the   avogadro's law   constant   to   calculate the moles of barium

  that   is     1 mole =   6.02   x 10^23 atoms

                    ? moles = 2.3 x 10^23   atoms

by cross   multiplication

=(1 mole   x 2.3x 10^23 atoms)   / 6.02   x10^23 atoms)=   0.382   moles

mass   is therefore = 137.3   g/mol x 0.382 mol = 52.4 ( answer c)

explanation:

it should be all of them because it asks if you included all of those in your answer

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