2 years ago

The rate of decay of a radioactive substances is calculated by

Chemistry

1 answer:

KIM [24]2 years ago

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Physical or chemical change? what gave you the idea that it was such?

Nana76 [90]

Answer:

Chemical Change

Explanation:

It changes color and produces vapor when the foil is added to the solution.

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How many grams of oxygen are needed to react with 4.6 grams of titanium(IV) chloride

velikii [3]

The answer is: 0.78g

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3 years ago

Please help me people it’s due today at 6:00pm please help me please please

vovangra [49]

Explanation:

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The ion MnOis often used to analyze for the Fe2+ content of an aqueous solution by using the (unbalanced) reaction Mno+Fe2+ + Fe

dusya [7]

Answer:

B) 0.230 M

Explanation:

The first step is to balance the reaction between the Ferrous ion and the permanganate ion:

$5~Fe^+^2~+~MnO_4^-^1~+~8H^+~->~5Fe^+^3~+~Mn^+^2~+4H_2O$

Then we have to calculate the moles of $MnO_4^-$ :

$M~=~\frac{mol}{L}$

$mol~=~M*L$

$mol~=~0.033~M*0.0633L=~0.002088~mol~MnO_4^-$

Then using the molar ratio we can find the moles of $Fe^+^2$ :

$0.002088~mol~MnO_4^-\frac{5~mol~Fe^+^2}{1~mol~MnO_4^-}=0.01044~mol~Fe^+^2$

Finally we can calculate the molarity:

$M=\frac{0.01044~mol~Fe^+^2}{0.0455~L}=0.230~M$

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3 years ago

When a metal bonds with a nonmetal, the bond that is formed is a(n) ___.

bekas [8.4K]

Ionic Bond, which is the transfer of electrons of a metal to a non-metal.

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