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प्रश्न
What is the significance of the formula H2O ?
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उत्तर
The significance of the formula H2O is:
It represents one molecule of water.
It provides important information on the constituents of water i.e. hydrogen and oxygen, through the chemical formula.
It also provides information on the number of atoms of each element present in one molecule of water.
It refers to the presence of one mole of molecules of water; it refers to 6.022 × 1023 molecules of water.
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संबंधित प्रश्न
Calculate the molecular masses of the following :
Chlorine, Cl2
(Atomic masses : H = 1 u ; O = 16 u ; Cl = 35.5 u ; N = 14 u ; C = 12 u)
Calculate the molecular mass of the following:
CuSO4·5H2O
Given atomic mass of Cu = 63·5, H = 1, O = 16, C=12, N = 14, Mg = 24, S = 32
Choose the correct answer from the options given below.
In water, the hydrogen-to-oxygen mass ratio is
Calculate the weight/mass of an atom of oxygen.
Calculate the weight/mass of the molecule of oxygen.
From the equation
\[\ce{3Cu + 8HNO3 -> 3Cu(NO3)2 + 4H2O + 2NO}\]
(Atomic mass Cu = 64, H = 1, N = 14,O = 16)
Calculate the mass of copper needed to react with 63g of HNO3.
Fill in the blank with the correct word from the options given below:
Relative molecular mass of an element/compound is the number of times one ________ of the substance is heavier than −1/12that the mass of an atom of carbon [C12].
Calculate the relative molecular mass of CaSO4 [Zn = 65, S=32, O = 16, Ca = 40, C = 12]
Write the name of the following compound and deduce its molecular mass.
NaOH
Write the name of the following compound and deduce its molecular mass.
NaHCO3
