(a) Calculate the number of electrons in a small, electrically neutral silver pin that has a mass of 10.0 g. Silver has 47 electrons per atom, and its molar mass is 107.87 g/mol. (b) Imagine adding electrons to the pin until the negative charge has the very large value 1.00 mC. How many electrons are added for every 109 electrons already present?

Question

(a) Calculate the number of electrons in a small, electrically neutral silver pin that has a mass of 10.0 g. Silver has 47 electrons per atom, and its molar mass is 107.87 g/mol.   (b) Imagine adding electrons to the pin until the negative charge has the very large value 1.00 mC. How many electrons are added for every 109 electrons already present?

sirpsta3u · Accepted Answer

Step 1a) It&#039;s necessary to determine the number of electrons in a small, electrically neutral silver pin of mass 10g. Molar mass of silver is known M=107.87gmol. It is possible to determine the number of atoms inside the pinNAg=mπnM⋅6⋅1023 atomsNAg=5.56225⋅1022 atomsInside every atom there a 47 electrons, it&#039;s necesarry to calculate the total amount of charge.Ne=47NAgNe=2.61⋅1024 elektronsqe=47⋅Neqe=435087CStep 2It&#039;s necessary to calculate the number of electrons in 1 mC.N=1mC1.67⋅10−19C=5.99⋅1015 electronsNow, we can determine the number of electrons for even 109.n=NNe109=2.29 for ever 109 electons

Ethan Sanders · Accepted Answer

Part A Moles of silver =10.0g107.8gmol=0.093moles calculate number silver atom using the Avogadro law =0.093×6.023×1023=5.58×1022atoms number of electron is therefore number of atom x atomic number that is 5.58×1022×47=2.62×1024electrons Part B we well know electron charge is 1.60×10−19c convert 1.00mc to coulombs =11000=1.0×10−3c Number of electron in 1.0×10−3 is therefore {(1.0×10−31.60×10−19)}=6.25×1015 number of (109) electrons {(2.62×1024109)}=2.62×1015 number of electron added per 109 is therefore ={(6.25×10252.62×1015)}=2.3per(109)

(a) Calculate the number of electrons in a small, electrically neutral

Answered question

Answer & Explanation

New Questions in Other