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CBSE /Class 9
Science MCQ Based On Atom and molecules introduction
Our free online Science test quiz for Class 9, CBSE will assist you to improve your Science skills on every concept in a fun interactive way.
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CBSE Class 9 Science Atom and molecules introduction
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1 mole = 6.022x10(23) atoms or molecules
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What is the mass of 1 mole of He?
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1 mole of NaCl consists of 6.022 x 10 (23) ions of sodium and a same number of ions of chlorine as well.
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