Final answer:
There are 10 distinct internal alkynes with a molecular formula of C6H10.
Step-by-step explanation:
According to the general formula of alkynes, which is CnH2n-2, we can determine the number of distinct internal alkynes with the molecular formula C6H10. In this case, n would be equal to 6. Plugging the value of n into the formula gives us (6 x 2) - 2 = 10. Therefore, there are 10 distinct internal alkynes with a molecular formula of C6H10.