Question

An alkane has molecular mass 100. The
molecular formula of the alkane is CxHy. What
is (y – x)?​

Answer 1

The alkane is C7H16 that is Heptane

Step-by-step explanation:

Step 1 of 2

• Since the molecular mass of the alkane is 100.
• From the formula of molecular mass, we get
• CnH2n+2=100
• 12n+2n+2=100
• 14n+2=100
• 14n=100-2
• 14n=98
• n=98/14
• n=7

Step 2 of 2

• Since, from the question, we have CxHy
• But from the formula of alkane, we know CnH2n+2. Therefore
• x=n
• y=2n+2
• So, putting the value of "n", we get
• x=7 and y=16

Final Answer

So, the alkane is C7H16 that is Heptane

#SPJ2