Explanation:
a) H2S (aq) + 2 O2 (g) → H2SO4(aq)
b) H2SO4 (aq) + CaCO3(s) → CaSO4 (s) + H2O (L) +CO2 (g)
To identify a redox reaction, we have to monitor the oxidation number of the elements to see if there is change.
In reaction (a);
The oxidation number of S increases from -2 (H2S) to + 6 (H2SO4). Also the oxidation number of O decreases from 0 (O2) to -2 (H2SO4). This is a redox reaction.
The oxidizing agent is O2 because it was reduced and the reducing agest is H2S.
In reaction (b);
There is no change in oxidation number in any f the elements. This is not a redox reaction.
<span>A 22.4-L sample of which of the following substances, at STP, would contain 6.02 x 1023 representative particles should be nitrogen. The answer is C. Thank you for posting your question here at brainly. I hope the answer will help you. Feel free to ask more questions.
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Answer:
A mixture is not a pure substance.
Answer:
Electrons treated as waves
Explanation:
Answer is: D. substitution.
Substitution reaction or single displacement reaction is a chemical reaction in which one functional group in a chemical compound is replaced by another functional group.
Balanced chemical reaction: CH₃Br(aq) + OH⁻(aq) → CH₃OH(aq) + Br⁻(aq).
In this balanced chemical reaction hydroxy group OH⁻ replaced one atom of bromine (Br⁻) in methyl bromide (CH₃Br).