basic concepts of chemistry

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Last updated 12:37 PM on 10/16/26
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9 Terms

1
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Moles =

Given mass / molar mass

2
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Molecules =

Moles x avagadro number

3
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Atoms =

Mole x Ag x atomicity

4
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% of element =

(Mass of element x no: of atoms of the element / mass of compound ) x 100

5
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Relation btwn molecular mass and vapour density

Molecular mass = 2 x V. D

6
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Moles of a gas =

Given vol of gas / molar volume of gas

7
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1 amu =

10/6 × 10^ -24g

8
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Avg atomic mass =

m1p1 + m2p2 / p1 + p2

P1+p2 = 100

9
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No of electrons =

Mole x Na x valence electrons in one molecule