Law of Definite Proportions Chemistry Practice Problems - Chemical Fundamental Laws

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Professor Organic Chemistry Tutor, thank you for an outstanding video/lecture on the Law of Definite Proportions in AP/General Chemistry. The examples/practice problems show how to calculate the Law of Definite Proportions from start to finish. This is an error free video/lecture on KZbin TV with the Organic Chemistry Tutor.

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People used to extract silver atomic mass 108 from silver bromide, AgBr in X-ray photographs. If bromine has an atomic mass of 80 what mass of silver can u extract from 564g of silver bromide

[@khalidkd8133]

324g of Ag can be extracted from 546g of AgBr.

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We can take the ratio of 54:48 as 9:8

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Are we using a mole?

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[@marvindaymiel374]

oh i'm sorry disarranged the numbers that's why it results into 0.375 . coz insted of 32/12 i make it 12/32

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[@maranada8683]

A 22.7 g sample of CaSO4 is found to contain 6.68 g of Ca and 10.7 g of O. Find the mass of sulfur in a sample of CaSO4 with a mass of 72.4 g. Could somebody help me solve this?

[@sepehrattaran2275]

Hi first you should Obtain the percentage of sulfur that makes up the first composition in terms of grams(23.56%) and then multiply this value by the second substance and you will have your answer(17.05 g) and the reason of multiplying is law of definite composition

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Sir wt is the meaning of this . *Atoms combine in the ratio of small whole numbers to form compunds* From ncert 9th 3 Rd chapter sir. I dint get this plz can u tel me

[@xavierstorm382]

It basically means how compounds are made; Compounds are basically formed when different atoms are combined, for example, h20, it's basically 2 (which is a whole number) atoms of hydrogen combined with 1 (again a whole number) atom of oxygen to form h20 (which is a compound)

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@7:40 is it the same as 3gC=1gH?

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Yeah its same as 3:1

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Where is law of reciprocal ?

[@whoasked6147]

i just multiplied the 30 by 2.67 and got the same answer

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where did you get the 36?

[@delvinrajeev3608]

24+12=36

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12x3

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Sir.May i know why grams is taken....,

[@ampapathibhaskar9412]

What about 64/24

[@marvindaymiel374]

where did you get 2.67 ? coz when i calculate 12/32 the answer is 0.375.

[@StudyBuddyWATCH1THIS1NOW1]

Iguess it is 32/12

[@marvindaymiel374]

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[@apoorvamh-zf6ev]

u should get 2.66666, but there r more no of 6 so they took 1 seven and ended the number .......

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in 3 question the answer is 21.75

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Sir that is not mass that is unit(u)

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How did you get 80 g c

[@abdulrahmanalzaidi]

he multiplied 30 by 32 and then he divided by 12

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The mass hydrogen is 2

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