Answer:
![\large \boxed{\text{3. Na}}](https://tex.z-dn.net/?f=%5Clarge%20%5Cboxed%7B%5Ctext%7B3.%20Na%7D%7D)
Explanation:
We can use oxidation numbers to decide which substance is reduced.
![\rm 2\stackrel{\hbox{0}}{\hbox{Na}} + 2\stackrel{\hbox{+1}}{\hbox{ H}_{2}}\stackrel{\hbox{-2}}{\hbox{O}}\longrightarrow \rm 2\stackrel{\hbox{+1}}{\hbox{Na}^{+}} + 2\stackrel{\hbox{-2}}{\hbox{O}}\stackrel{\hbox{+1}}{\hbox{H}^{-}} + \stackrel{\hbox{0}}{\hbox{H}_{2}}](https://tex.z-dn.net/?f=%5Crm%202%5Cstackrel%7B%5Chbox%7B0%7D%7D%7B%5Chbox%7BNa%7D%7D%20%2B%202%5Cstackrel%7B%5Chbox%7B%2B1%7D%7D%7B%5Chbox%7B%20H%7D_%7B2%7D%7D%5Cstackrel%7B%5Chbox%7B-2%7D%7D%7B%5Chbox%7BO%7D%7D%5Clongrightarrow%20%5Crm%202%5Cstackrel%7B%5Chbox%7B%2B1%7D%7D%7B%5Chbox%7BNa%7D%5E%7B%2B%7D%7D%20%2B%202%5Cstackrel%7B%5Chbox%7B-2%7D%7D%7B%5Chbox%7BO%7D%7D%5Cstackrel%7B%5Chbox%7B%2B1%7D%7D%7B%5Chbox%7BH%7D%5E%7B-%7D%7D%20%2B%20%5Cstackrel%7B%5Chbox%7B0%7D%7D%7B%5Chbox%7BH%7D_%7B2%7D%7D)
The oxidation number of Na changes from 0 in Na to +1 in Na⁺.
The oxidation number of H changes from +1 in H₂O to 0 in H₂.
![\text{An increase in oxidation number is oxidation, so $\large \boxed{\textbf{Na}}$ is the substance oxidized.}](https://tex.z-dn.net/?f=%5Ctext%7BAn%20increase%20in%20oxidation%20number%20is%20oxidation%2C%20so%20%24%5Clarge%20%5Cboxed%7B%5Ctextbf%7BNa%7D%7D%24%20is%20the%20substance%20oxidized.%7D)
1 and 4 are wrong because H₂ and Na⁺ are products.
2. is wrong because there is no H⁺ to be oxidized or reduced.
Answer:
The molarity of the solution is 245, 2M.
Explanation:
We calculate the molarity, which is a concentration measure that indicates the moles of solute (in this case KCl03) in 1000ml of solution (1 liter):
0,25 L solution----- 61,3 moles of KCl03
1 L solution----x= (1 L solution x 61,3 moles of KCl03)/0,25 L solution
x=245, 2 moles of KCl03 --> <em>The molarity of the solution is 245, 2M</em>
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Answer:
NaCI + O2= NaCIO3 I think
I think it's the minimum required energy to the reaction to occur
In my opinion yes, as of now, almost anyone could get there hands on lets say an explosive. Have you heard of dynamite fishing? It is illegal, but it is still done once people have access to dynamite, then what ends up happening not only do marine wildlife get killed but it pollutes the water and lessens the chance of the natural cycle of life. Also there are several other factors, firstly, what will you do with an explosive once you get your hands on it? Perhaps you could just use an explosive for fun/personal entertainment...that isn't right and it could harm people. So, to conclude the harder it is for people to access explosives or even acclerants the better...and to add this can be possible by making people get like some sort of licence to use them, and let them be trained in certain conditions so that there is no regrets once they have access to them. I know my idea sounds far fetched but its a thought!