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Crazy boy [7]
4 years ago
13

I WILL GIVE U BRAINLIESTt!!!!!!!!!!!

Chemistry
1 answer:
nirvana33 [79]4 years ago
4 0
I would say b and d but I wouldn’t really know :/
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Iodine-131 has a half-life of 8 days. If the amount of iodine-131 in the orginial sample is 8 g, how much iodine-131 will remain
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Veseljchak [2.6K]

Answer : All of the above are valid expressions of the reaction rate.

Explanation :

The given rate of reaction is,

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The expression for rate of reaction for the reactant :

\text{Rate of disappearance of }NH_3=-\frac{1}{4}\times \frac{d[NH_3]}{dt}

\text{Rate of disappearance of }O_2=-\frac{1}{7}\times \frac{d[O_2]}{dt}

The expression for rate of reaction for the product :

\text{Rate of formation of }NO_2=+\frac{1}{4}\times \frac{d[NO_2]}{dt}

\text{Rate of formation of }H_2O=+\frac{1}{6}\times \frac{d[H_2O]}{dt}

From this we conclude that, all the options are correct.

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Which molecule will have a double covalent bond?<br> #3 #5 &amp; #6
KatRina [158]

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4 0
3 years ago
Please please help :(
Bad White [126]

Answer: ¹²₅C

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¹²₅C is incorrect. The superscript is the atomic mass. This varies between each element. The subscript is the atomic number. This doesn't change. You will see every element has the correct atomic atomic number except for Carbon. Carbon should have atomic number 6.

7 0
3 years ago
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