Umayr Shaikh

This page lists questions and answers that were posted by visitors named Umayr Shaikh.

Questions

The following questions were asked by visitors named Umayr Shaikh.

Answers

The following answers were posted by visitors named Umayr Shaikh.

That's good, you have a good foundation. Since you're only looking for the oxidation number of chromium at this point, let's look at it like this. The polyatomic ion Cr2O7, or dichromate, has a 2- charge. Hence, the charges of the individual ions have to...