Every mole is 22.4 L at STP
First find the oxidation states of the various atoms:
<span>in Cr2O2 2- Cr @ +1; In NH3 N @ +3; in CrO3 Cr @ +3, N2 N @ 0 </span>
<span>Note that N gained electrons, ie, was reduced; Cr was oxidized </span>
<span>Now there is a problem, because B has NH4+ which the problem did not, and is not balanced, showing e- in/out </span>
<span>B.NH4+ → N2 </span>
<span>Which of the following is an oxidation half-reaction? </span>
<span>A.Sn 2+ →Sn 4+ + 2e- </span>
<span>Sn lost electrons so it got oxidized</span>
Answer:
Sublimation is a phase transition that occurs when a solid changes into a gas — or, as
Explanation:
You should always do A. form a hypothesis before performing an experiment also the other options cannot happen until after an experiment.
Answer:(3)
Explanation: 2Al+3H2SO4----->Al(2SO4)3+3H2
