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Atoms And Molecules

Question
CBSEENSC9005067
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How many moles of chlorine atoms are present in one mole of the following compounds:

(i) Cl2O7 (ii) HCl (iii) BaCl2 (iv) AlCl3 (v) FeCl3 (vi) CCl4.

Solution

(i) 2 moles of chlorine atoms in one mole of Cl2O7

(ii) 1 mole of chlorine atoms in one mole of HCl

(iii) 2 moles of chlorine atoms in one mole of BaCl2

(iv) 3 moles of chlorine atoms in one mole of AlCl3

(v) 3 moles of chlorine atoms in one mole of FeCl3

(vi) 4 moles of chlorine atoms in one mole of CCl4.

Some More Questions From Atoms And Molecules Chapter

Convert into mole

(a) 12 gm of oxygen gas

(b) 20 gm of water

(c) 22 gm of carbon dioxide.

What is the mass of?

(a) 0.2 mole oxygen atoms.

(b) 0.5 mole of water molecules.

Calculate the number of molecules of sulphur (S8) present in 16 gm of solid sulphur.

Calculate the number of aluminium ions present in 0.56 gm of aluminium oxide.

Explain law of conservation of mass.

50 g of 10% lead nitrate is mixed with 50 g of 10% sodium chloride in a closed vessel. After the reaction has taken place, it was found that 6.83 g of lead chloride was precipitated. Besides, the reaction mixture contained 90 g water and sodium nitrate. Calculate the amount of sodium nitrate formed.

Name and explain two important laws of chemical combination ?

What are the postulates of Dalton’s atomic theory of matter?

Hydrogen and oxygen combine in two different ways to produce water and hydrogen peroxide. Which of Dalton’s law does this observation confirm? Explain.

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