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प्रश्न
How many grams of H2O are present in 0.2 mole of it?
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उत्तर
1 mole of water weighs = (1 x 2) + 16 = 18 g
∴ 0.2 mole of H2O has mass = 0.2 x 18 = 3.6 g
संबंधित प्रश्न
A gas cylinder can hold 1 kg of hydrogen at room temperature and pressure
1) Find the number of moles of hydrogen present.
2) What weight of CO2 can the cylinder hold under similar conditions of temperature and pressure? (H = 1, C = 12, O = 16)
3) If the number of molecules of hydrogen in the cylinder is X, calculate the number of CO2 molecules in the cylinder under the same conditions of temperature and pressure.
4) State the law that helped you to arrive at the above result.
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