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Masja [62]
3 years ago
10

How many moles of oxygen are produced by decomposing 40.5 g of h2o2 (molar mass = 34.0 g/mol) according to the equation:h2o2 --&

gt; h2o + o2 (unbalanced)?
Chemistry
1 answer:
77julia77 [94]3 years ago
3 0
The balanced equation;
2H₂O₂ ---> 2H₂O + O₂
the stoichiometry of H₂O₂ to O₂ is 2:1
this means that when 2 moles of H₂O₂ decompose, 1 mol of O₂ is formed.
Molar mass of  H₂O₂ - 34 g/mol
the mass of H₂O₂  decomposed - 40.5 g
the number of moles of H₂O₂ decomposed - 40.5 g/ 34 g/mol   = 1.19 mol
according to the stoichiometry of 2:1 ,
number of O₂ moles formed = 1.19 mol/2 = 0.60 mol 
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Anna71 [15]

The compound that is most likely present when treated with bromine and the sample absorbs the red bromine color is ; Cycloheptene

<h3>What is cycloheptene </h3>

Cycloheptene is an unsaturated colorless oily liquid which is insoluble in water it absorbs Bromine when used in performing unsaturation test due it unsaturated nature.

The red bromine color will be absorbed when used to treat Cycloheptene but will not be absorbed when used to treat cycloheptane due to its saturated nature.  

Hence we can conclude that the compound that is present is Cycloheptene.

Learn more about Unsaturation : brainly.com/question/561845

5 0
3 years ago
Which phrase best describes the salinity of ocean water?
Irina-Kira [14]

Answer:

it's B

Explanation:

number of grams mineral salt in one is also the description of the salinity of ocean water

4 0
3 years ago
On hot days, you may have noticed that potato chip bags seem to "inflate", even though they have not been opened. If I have a 25
Slav-nsk [51]

The new volume of the bag will be 789.5 mL.

<u>Explanation:</u>

As per the Charles law, at constant pressure the volume of the gas is directly related to its temperature in Kelvin (K). That is as the temperature increases, the gas expands and vice-versa.

$\frac{V1}{T1} = \frac{V2}{T2}\\

V1 = 250 ml

V2 = ?

T1 = 19° C

T2 = 60° C

Now we have to rewrite the equation to get the new volume as,

V2 = $\frac{V1T2}{T1}

    =$\frac{250\times60}{19}

<em>     </em>= 789.47 ≈ 789.5 ml.

So the new volume of the bag will be 789.5 mL.

7 0
3 years ago
How many grams are in 2 moles of Iodine?
Nady [450]

Answer: 253.8

Explanation:

The molar mass of iodine is 126.904. Multiply that by two and you get approximately 253.8 grams in two moles.

6 0
3 years ago
Read 2 more answers
Lewis structure for CO2
liq [111]
O = C = O Straight because there is no solitary electrons on C
5 0
3 years ago
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