Question

calculate the number of particles in each of the following :(1) 7gm of nitrogen molecules. (2) 0.5 mole of carbon atoms. { Given; N= 14u; C =12u; N°= 6.022×10^23 per mole }

Answer 1

Heya friend,
Here's it:


(1) We know,          Number of moles = Given mass / molar  mass
                                                           = 7 / 14
 
                                number of moles = 0.5 or 1/2

(2) Number of moles = 0.5, Na (avagadro's number) = 6.022 * 10^23

As,

Number of moles = Number of particles / Na


We get,

Number of particles = Number of moles * Na
or,                            = 0.5  * 6.022 * 10^23
                                = 3.011 * 10^23

Answer 2

Answer:

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