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Biology; Chemistry; Physics: Post your doubts here!

simranlalchand

simranlalchand

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The acid G contains two carboxylic acid groups and has the formula
HO2CCxHyCO2H
where x and y are whole numbers.
Deduce the values of x and y in the formula. given the molecular mass of G is 132g
 
Saad Mughal

Saad Mughal

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simranlalchand said:
The acid G contains two carboxylic acid groups and has the formula
HO2CCxHyCO2H
where x and y are whole numbers.
Deduce the values of x and y in the formula. given the molecular mass of G is 132g
Click to expand...
2 Carboxylic groups have mass (2*45) = 90.
Therefore mass of CxHy = 132 - 90 = 42
Hence,
12x + y = 42
Apply trial and error,
when x = 3,
36 + y = 42
y = 6.
x cannot be greater than 4.
At x = 2, y = 18.
At x = 1, y = 30.
Both of which are not possible.
Hence, x = 3 , y = 6.
 
Suchal Riaz

Suchal Riaz

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Saad Mughal
help needed man. Potassium Manganate is a base? if yes what is it's formula and it's equation with reaction with an acid. and color change. everything we need to know about it.
 
K

Khadija_1234

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sourov97 said:
the water level didn't change...this means that if there was any change of gases between the porous pot and the inverted beaker, the molecular mass of that gas should be equal to that of CO (12 + 16 = 28).
(d) nitrogen (gas) is the answer. (14 + 14 = 28)
Click to expand...
Okay thanks :)
So if the water level had raised, what would that have indicated?
 
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