I think the answer is a pure substance
Answer:
B
Explanation:
you're moving the decimal 8 spots to the left so it can only be B
Answer:

Explanation:
Hello,
In this case, given the balanced reaction:

We can see a 2:4 mole ration between permanganate ion (118.9 g/mol) and manganese (IV) oxide (86.9 g/mol), that is why the resulting mas of this last one turns out:

Best regards.
The answer should be Pure substance