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Subject: Chemistry, asked on 10/4/18

What is least (minimum) molar mass. Please Explain in an easy way with the help of an example. Like explain my taking any real life thing.. not atoms pls..(humble request).

Subject: Chemistry, asked on 10/4/18

↵Our teacher gave this explanation. Can any expert help me in understanding this example for law of multiple proportion?? Please try understanding this and help!
Explanation for law of multiple proportion:
exp:                     N                                     D
N2O 28 16
NO 28 32
N2O3
28 48
N2O​4
28 64

N2O​5		 28 80

FIXING N2  AS 28
 

Subject: Chemistry, asked on 10/4/18

1.8 g of certain metal burnt in oxygen gave 3 g of its oxide. Also 1.5 g of same metal heated with steam to give 2.5 g of same metal oxide. Show that results illustrate law of constant proportion.( Metal+steam = metal oxide + Hydrogen. This thing is confusing me, as what about hydrogen. So pls explain this also.

Subject: Chemistry, asked on 9/4/18

How many g of element are present in 10g atom of silicon? Ans : 28 gm of silicon. How? Pls explain.

Subject: Chemistry, asked on 8/4/18

1 mole of Hydrogen gas will occupy 22.4 litres, right? This also means 2g of hydrogen gas occupies 22.4 litres of gas, right?

Subject: Chemistry, asked on 8/4/18

My conclusions:
1 mole means 1 atom of hydrogen
1 mole means 1 atom of sulphur
... 1 mole means 1 atom of any substance.
I am confused as 1 mole means 6.023 x 10^23 atoms so please I am not understanding this concept.

Subject: Chemistry, asked on 8/4/18

1 mole of atoms of hydrogen means how many grams? Same case for oxygen?

Subject: Chemistry, asked on 8/4/18

The chemical formula of iron ore: iron pyrites is FeS_Q. What's "Q" here?

Subject: Chemistry, asked on 8/4/18

What is mole in simplest language? Ex: how many moles are there of H2 in H2SO4? How?

Subject: Chemistry, asked on 6/4/18

I am getting confused between relations of mole with amu and grams. Please explain a bit with help of an example also. Please!
Thank you!

Subject: Chemistry, asked on 6/4/18

a.  Find the no. of electrons present in 64 gram of o2- (oxide) ions?
b.  Find the no. of electrons present in 64 gram ions of o2- (oxide) ions.

Subject: Chemistry, asked on 6/4/18

Q.Find the number of moles of each atom in 392 gram of H2SO4.
I am not understanding no. of moles of each atom?!? That's confusing...
No. of moles =4. From that how can we get of H2, sulphur and oxygen? Please explain this a bit from basic..

Subject: Chemistry, asked on 22/6/17

1,2&3 question

Subject: Chemistry, asked on 20/6/17

What is the significant number of 0.000311

Subject: Chemistry, asked on 19/12/16

I would like to thank all my meritnation teachers for their help and coordination , as a  result of which I cleared KVPY stage 1 . I would be glad if there were some suggestions to prepare for the next round . Thanks again , to all my wonderful teachers here !

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