Estimate The Numbers

Estimate the number of atoms in a ring made out of 1cm^(3) of gold.

Estimate the number of electrons in 100 g water. How much is the total negative charge on these electrons?

Estimate the number of air molecules that are in a room 4.00 m by 6.00 m by 3.00 m at standard pressure and room temperature (293K).

The drift current in a p-n junction is 2.0(mu)A . Estimate the number of electrons crossing a cross section per second in the depletion region.

A polythene piece rubbed with wool is found to have negative charge of 3 xx 10^-7 C . Estimate the number of electrons transferred.

(a) A body is having charge +4.8 xx 10^(-18) C . Estimate the number of electrons in excess/shortage. (b) A body is having charge 3 xx 10^(-12) C . Determine whether this statement is true/false. (c) Estimate the number of electrons in 36 g of water. How much is the total negative charge on these electrons. (d) Estimate the charge in 26 g of Na^(+) .

Estimate the number of free electrons in 36g of water and the negative charge possessed by them. Given : Avogadro's number = 6.023xx10^(23) and molecular weight of water = 18.

Estimate the number of free electrons in 1g of water and negative charge possessed by them. Given that Avogadro number =6.02xx10^(23) and molecular weight of water = 18

A polythene piece rubbed with wool is found to have a negative charge of 3.2xx10^(-7) C (i) Estimate the number of electrons transferred. (ii) Is there a transfer of mass from wool to polythene ?