I'll be honest I'm guessing,
but maybe D
1. False (gravity)
2. True
3. False
4.True
5. False
Hopefully this helps :)
The balanced half-reaction: Cr²⁺⁺(aq) → Cr⁴⁺(aq) + 2e⁻.
Chromium(II) cations two electrons and became chromium(IV) cations.
<span>Oxidation
reaction is increasing of oxidation number of element, because element or
ion lost electrons in chemical reaction.
</span><span>Reduction is lowering
oxidation number because element or ions gain electrons.</span>
Answer: 5.5 7.5 102
Explanation: using the equation above you can get these %s
