|
State the law of constant proportion
|
|
1
|
14192
|
November 25, 2016
|
|
Write the formulae and names of the compounds by the following ions:
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|
1
|
602
|
November 24, 2016
|
|
Write the chemical formulae of following compound
|
|
1
|
3202
|
November 24, 2016
|
|
State three points of differences between an atom and a molecule
|
|
0
|
5683
|
November 24, 2016
|
|
Calculate the number of atoms
|
|
1
|
596
|
November 24, 2016
|
|
Calculate the number of moles for the following:84 g of nitrogen atoms
|
|
1
|
5238
|
November 24, 2016
|
|
Calculate the number of moles for the following:
|
|
1
|
5809
|
November 24, 2016
|
|
Calculate the mass of 1 molecule of oxygen gas
|
|
1
|
15588
|
November 24, 2016
|
|
The mass of a single atom of an element is 2.65x${10}^{23}$g
|
|
1
|
1741
|
November 24, 2016
|
|
Calculate the number of molecules in 11 g of $C{{O}_{2}}$
|
|
1
|
635
|
November 24, 2016
|
|
State the formula of the compound
|
|
1
|
1706
|
November 24, 2016
|
|
Calculate the number of molecules
|
|
1
|
525
|
November 24, 2016
|
|
Calculate the number of molecules in 4 g of methane
|
|
1
|
6949
|
November 24, 2016
|
|
Convert 12.043 x ${10}^{22}$ molecules of sulphur dioxide into moles
|
|
1
|
2200
|
November 24, 2016
|
|
Convert into mole
|
|
1
|
1023
|
November 24, 2016
|
|
An element Y has a valency of 4
|
|
1
|
2304
|
November 24, 2016
|
|
Calculate the molar mass of $C{{O}_{2}}$
|
|
1
|
614
|
November 24, 2016
|
|
If 12 g of C is burnt in the presence of 32 g of ${{O}_{2}}$
|
|
1
|
532
|
November 24, 2016
|
|
Calculate the molar mass of the following compounds
|
|
1
|
1841
|
November 24, 2016
|
|
Calculate its molecular mass
|
|
1
|
643
|
November 24, 2016
|
|
What is the difference between sodium atom and sodium ion?
|
|
0
|
2774
|
November 24, 2016
|
|
How do molecules exist in a chemical reaction?
|
|
0
|
2034
|
November 24, 2016
|
|
What is the relative atomic mass of an element?
|
|
1
|
770
|
November 24, 2016
|
|
Define atomic mass unit. State how do atoms exist?
|
|
0
|
7748
|
November 24, 2016
|
|
Mention any two important rules for writing a chemical formula
|
|
1
|
2872
|
November 24, 2016
|
|
Give the names of any two elements
|
|
1
|
1184
|
November 24, 2016
|
|
What change would you observe in the overall mass of the content?
|
|
1
|
896
|
November 24, 2016
|
|
Write the Latin names of sodium and iron
|
|
0
|
1757
|
November 24, 2016
|
|
When was the Modern postal system introduced i in India?
|
|
0
|
628
|
August 4, 2016
|
|
Define Avogadro's constant. How is it related to mole?
|
|
0
|
3942
|
June 29, 2016
|