2 years ago

Is cleaning bleach a pure substance or mixture

1 answer:

4 0

Cleaning bleach is a mixture of chemicals. pure bleach is called hypochlorite and is a pure substance.

hope i helped :)

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What is the percent yield of O2 if 10.2 g of O2 is produced from the decomposition of 17.0 g of H2O?

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The balanced chemical reaction will be:

2H2O = 2H2 + O2

We are given the amount of water used in the decomposition reaction. This will be our starting point.

17.0 g H2O (1 mol H2O/ 18.02 g H2O) (1 mol O2/2 mol H2O) ( 32.00 g O2/1mol O2) = 15.09 g O2

Percent yield = actual yield / theoretical yield x 100

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Percent yield = 67.58%

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Last week you reacted magnesium with a hydrochloric acid aqueous solution and hydrogen gas was produced. Let's say that you coll

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Answer:

69.8 kilo Pasacl is the pressure of the hydrogen gas.

Explanation:

$Mg+2HCl\rightarrow MgCl_2+H_2$

Pressure at which hydrogen gas collected = p = 101.2 kilo Pascals

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The pressure of hydrogen gas = P

The pressure at which gas was collected was sum of vapor pressure of water and hydrogen gas.

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$P =p-p^o=101.2 kPa-31.4 kPa=69.8 kPa$

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