Chemistry question

Came across a question with the basic statement as Tin forms an oxide that contains the metal in both oxidation states. Now I’ve deduced the ratio of the two states i.e: Sn2+n4+=2:1. How do I get the formula from this ratio? Please explain thanks

whats the full question

Posted as a reply

what exam board btw? and where can you find these questions from?
ill get back with the question when I have time tonight

This is cambridge A level chemistry 9701. Past papers are widely available online

damn what yr and exam board do you do?

Cambridge gce A2 level 🥲