Which separation technique will you apply for the separation of wheat grains from husk?

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VIDYA GURU

Winnowing.
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What are alloys?
It is mixture of metals example steel,bronze. Bronze is alloy of aluminium,nickel or zinc and manganese. Steel is made of iron,chromium also small percentage of carbon,nickel,
Nasar
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Which has more number of atoms, 100 grams of sodium or 100 grams of iron (given, atomic mass of Na = 23 u, Fe = 56 u)?
100 gm of sodium will have (Given mass / molar mass )x Avogadro's Number = (100/23) x 6.022 x 10^23 = 2.62 x 10^24 atoms 100 gms of Iron will have (100/56) x 6.022 x 10^23 = 1.07 x 10^24 atoms So 100 gms of Sodium will have more atoms.
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Define the atomic mass unit.
An atomic mass unit is defined as 1/12th of mass of an atom of carbon-12. This is approximately 1.67 ×10^-27 kilograms.
Santosh
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Calculate the mass of 0.5 mole of N2 gas (mass from mole of molecule).
Molar mass of N2 is 28(since atomic weight of nitrogen is 14and forN2=14*2). So mass of 1 mole of N2 is 28g.Therefore mass of 0.5 mole is 28/2 =14g
Neha

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