Chemistry: How many grams of oxygen can be produced from the decomposition of 100. g of kclo3?

How many grams of oxygen can be produced from the

Ответ:

jeff7259

15.03.2022

Chemistry

39.168g of $O_{2}$

Explanation:

Step 1: Determine the number of moles of $KClO_{3}$

$n=\frac{m}{M}$

where 'n' is the number of moles, m is the mass of compound and M is the molar mass of compound

$n_{KClO_{3}}=\frac{m_{KClO_{3}}}{M_{KClO_{3}}}$

$n_{KClO_{3}}=\frac{100.0}{39+35.5+3(16)}$

$n_{KClO_{3}}=\frac{100.0}{122.5}$

$n_{KClO_{3}}=0.816 mol$

Step 2: Determine number of moles of $O_{2}$ produced per mole of $KClO_{3}$ decomposed

$2KClO_{3} - 3O_{2} + 2KCl$

1 mole of $KClO_{3}$ will produce 1.5 moles of $O_{2}$

$n_{O_{2}} = 1.5 * n_{KClO_{3}}$

$n_{O_{2}} = 1.5 * 0.816$

$n_{O_{2}} = 1.224 mol$

Step 3: Determine mass of $O_{2}$

$m_{O_{2}}=n_{O_{2}}M_{O_{2}}$

$m_{O_{2}}=1.224*2(16)$

$m_{O_{2}}=39.168 g$

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Ответ:

grandpamyth

23.07.2022

Chemistry

To solve this we use the equation,

M1V1 = M2V2

where M1 is the concentration of the stock solution, V1 is the volume of the stock solution, M2 is the concentration of the new solution and V2 is its volume.

3 M x 2 mL = M2 x 250 mL

M2 = 0.024 M

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How many grams of oxygen can be produced from the decomposition of 100. g of kclo3?

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