which is correct?

[Unregistered]

The compound is obtained with a/an yield of 26%.
Dear Teacher, which is correct a or an?

[ian2]

The compound is obtained with a/an yield of 26%.
Dear Teacher, which is correct a or an?

"A yield of" is correct, because the word "yield" does not start with a vowel.

In fact, questions of this type can be answered by using the Internet. If you google "a yield of", you get over a million returns, but if you google "an yield of", you get only around 10,000 returns, which means the former is correct, for most people use it.