1 Point
Which type of molecular model shows all the atoms and bonds in an organic
molecule?
A. Atomic
O
O
B. Structural
c. Skeletal
D. Formula
SUBMIT

Explanation:

The atomic or molecular formula represents each kind of atom by its chemical symbol and the number of each kind of atom by a subscript, but it does not show how they are connected. Thus, many different compounds have the same atomic or molecular formula.

The skeletal formula is a kind of abbreviated molecular formula in which the carbon and hydrogen atoms are not indicated but are understood. The skeletal formula shows the chain, the double and triple bonds, and the atoms different to carbon and hydrogen. Each vertex on the chain represents on carbon atom, and the hydrogen atoms (not shown) are the needed to complete the four valence electrons of each carbon atom.

The structural formula shows each atom, using the chemical symbol,  and how they are connected in the compound, i.e. the bonds, using short lines.

For instance, the structural formula for the simplest organic compound, methane, CH₄, is:

              H

               |

       H -  C -  H

               |

              H

as given the equation is

2al + 6 hcl > 2 alcl3 + 3 h2(g)

as per equation two moles of aluminum reacts with six moles of hcl to give two moles of alcl3 and three moles of hydrogen gas

given: three moles of al are present and 7 moles of hcl

for three moles of aluminum nine moles of hcl will be required

however as 7 moles of hcl are present so the limiting reagent is hcl

hcl is going to decide the number of moles of product formed

when six moles of hcl are present = 3 moles of h2 are formed

when one mole of hcl is present == 3/6 mole sof h2 will be formed

when 7 moles of hcl are present = 3 x 7/ 6 moles of h2 will be formed = 3.5 moles of h2