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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
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.
Samples of the gases O2, N2, CO2 and CO under the same conditions of temperature and pressure contain the same number of molecules represented by X. The molecules of Oxygen, occupy V litres and have a mass of 8 g. Under the same conditions of temperature and pressure :
What is the volume occupied by : X molecules of N2.
Calculate the percentage of phosphorus in Calcium hydrogen phosphate Ca(H2PO4)2
Calculate the percent composition of Potassium chlorate KClO3.
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\[\ce{CaCO3 + 2HNO3 -> Ca(NO3)2 + H2O + CO2}\]
Calculate the volume of carbon dioxide evolved at S.T.P.
66g of ammonium sulphate is produced by the action of ammonia on sulphuric acid. Write a balanced equation and calculate mass of ammonia required.
The reaction between the red lead and hydrochloric acid is given below:
\[\ce{Pb3O4 + 8HCl -> 3PbCl2 + 4H2O + Cl2}\]
Calculate the mass of lead chloride formed by the action of the 6.85 g of red lead.
What volume of oxygen is required to burn completely a mixture of 22.4 dm3 of methane and 11.2 dm3 of hydrogen into carbon dioxide and steam?
\[\ce{CH4 + 2O2 -> CO2 + 2H2O}\]
\[\ce{2H2 + O2 -> 2H2O}\]
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.
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\[\ce{P + 5HNO3 -> H3PO4 + 5NO2 + H2O}\]
If 6.2 g of phosphorus was used in the reaction, calculate the volume of steam produced at the same time if measured at 760 mm Hg pressure and 273°C.
