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CBSE Notes 2011-2012

IX

science TEST PAPER

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Cross Word Puzzle On Sets

Dear Studetns,

Today I am sharing with you a crossword puzzle created with the help of eclipse crossword puzzle maker software. Try to solve this and share your views/ openions on it with me. 

Wish you all the best. 

 

Across

 

PRACTISE QUESTIONS On MOLE CONCEPT By JSUNIL

1. Determine the mass of 6.022 X 1023 number of N2 molecules.
2. Calculate the number of particles in-
(i) 8 g of O2 molecules (ii) 2.5 mol of calcium atoms.
3. What is the mass of 2.5 mol of Methane?
4. Find the mass of one molecule of water.
5. Calculate the number of water molecules and number of oxygen and hydrogen atoms in a drop of water containing 0.03 mol of water.

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