Answer:
Methane: 1
Ethane: 2
Ethene: 2
Pentane: 5
Propene: 3
Hexane: 6
Ethyne: 2
Propane: 3
Hexane: 7
Octane: 8
Decane: 10
Butyne: 4
Butane: 4
Propyne: 3
Butene: 4
Explanation:
Use the chemical formula of the compounds:
Methane ⇒ [tex]CO_4[/tex] Hexane ⇒ [tex]C_6H_14[/tex] Decane ⇒ [tex]C_10H_22[/tex]
Ethane ⇒ [tex]C_2H_6[/tex] Ethyne ⇒ [tex]C_2H_2[/tex] Butyne ⇒ [tex]C_4H_6[/tex]
Ethene ⇒ [tex]C_2H_4[/tex] Propane ⇒ [tex]C_3H_8[/tex] Butane ⇒ [tex]C_4H_10[/tex]
Pentane ⇒ [tex]C_5H_12[/tex] Hexane ⇒ [tex]C_7H_16[/tex] Propyne ⇒ [tex]C_3H_4[/tex]
Propene ⇒ [tex]C_3H_6[/tex] Octane ⇒ [tex]C_8H_18[/tex] Butene ⇒ [tex]C_4H_8[/tex]
In the chemical formulas above, each formula has things known as coefficients (elements) and subscripts (atoms).
So to further explain, take methane as an example, there is a "C" at the beginning. C is capital as it is a pure substance and is a element. This also means there is 1 carbon atom in methane while there is 4 oxygen atoms. But to explain further, let's review definitions:
What is a compound in chemistry
A pure substance composed of two or more elements composed of two or more elements.
What is a pure substance in chemistry
A pure substance is a single element or compound, not mixed with any other substance
What is a element in chemistry
One of a class of substances that cannot be separated into simpler substances by chemical means.
What is a chemical formula (Alternative name for molecular formula)
A chemical formula that indicates the kinds of atoms and the number of each kind in a molecule of a compound.
So after reviewing let's find the carbon atoms.
The subscripts in each chemical formula that are to the right to the "C" are the amount of carbon atoms. If a capital letter does not have a subscript, it is assumed to have 1 atom only.
Your answers can be found above.
