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प्रश्न
Give three pieces of information conveyed by the formula H2O.
उत्तर
Three pieces of information conveyed by the formula H2O is that :
It shows that there are 2 hydrogen atoms and 1oxygen atoms present in H2O. The hydrogen and oxygen atoms are present in simplest whole number ratio of 2:1. It represents one molecule of compound water.
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संबंधित प्रश्न
Prove the Following :
Oxygen is a diatomic molecule.
Nitrogen and oxygen gas react as illustrated by the equation given below: N2 + O2 → 2NO
Calculate the volume of each reacting gas required to produce 1400cm3 of nitric oxide.
Under the same conditions of temperature and pressure you collect 2L of carbon dioxide, 3L of chlorine, 5L of hydrogen, 4L of nitrogen and 1L of sulphur dioxide. In which gas sample will there be :
a. The greatest number of molecules.
b. The least number of molecules.
Justify your answer.
If the hydrogen sample contains N molecules, how many molecules are present in oxygen sample?
Define atomicity of a gas. State the atomicity of Hydrogen, Phosphorus and Sulphur.
Solid ammonium dichromate decomposes as :
\[\ce{(NH4)2Cr2O7 -> N2 + Cr2O3 + 4H2O}\]
If 63 g of ammonium dichromate decomposes. Calculate calculate the mass of chromium (III) oxide formed at the same time.
Concentrated nitric acid oxidizes phosphorus to phosphoric acid according to the following equation:
\[\ce{P + 5HNO3 -> H3PO4 + 5NO2 + H2O}\]
If 6.2 g of phosphorus was used in the reaction, calculate the number of moles of phosphorus taken and mass of phosphoric acid formed.
Pure calcium carbonate and dilute hydrochloric acid are reacted and 2 litres of carbon dioxide were collected at 27°C and normal pressure.
\[\ce{CaCO3 + 2HCl -> CaCl2 + H2O + CO2}\]
Calculate the mass of the acid required.
Concentrated nitric acid oxidizes phosphorus to phosphoric acid according to the following equation:
\[\ce{P + 5HNO3 -> H3PO4 + 5NO2 + H2O}\]
If 6.2 g of phosphorus was used in the reaction, calculate the mass of nitric acid consumed at the same time.
Concentrated nitric acid oxidises phosphorus to phosphoric acid according to the following equation:
\[\ce{P + 5HNO3_{(conc.)}-> H3PO4 + H2O + 5NO2}\]
If 9.3 g of phosphorus was used in the reaction, calculate:
- Number of moles of phosphorus taken.
- The mass of phosphoric acid formed.
- The volume of nitrogen dioxide produced at STP.
