Atoms And Molecules
Which of the following correctly represents 360 g of water? (i) 2 moles of H2O ii) 20 moles of water. iii) 6.022×1023 molecules of water. iv) 1.2044×1025 molecules of water.
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Convert into mole.(a) 12 g of oxygen gas(b) 20 g of water(c) 22 g of carbon dioxide.
Calculate the number of aluminium ions present in 0.051 \ g of aluminium oxide.
What is the mass of : (a) 0.2 mole of oxygen atoms? (b) 0.5 mole of water molecules?
Which of the following has maximum number of atoms?
Give the names of the elements present in the following compounds.(a) Quick lime(b) Hydrogen bromide(c) Baking bromide(d) Potassium sulphate.
Calculate the number of molecules of sulphur(S8) present in 16 g of solid sulphur.
A 0.24 g sample of compound of oxygen and boron was found by analysis to contain 0.096 g of boron and 0.144 g of oxygen. Calculate the percentage composition of the compound by weight.