AT&T; 2:05 PM * 94% a edugen wileyplus.com I Hein, Foundations of College Chemis

Question

AT&T; 2:05 PM * 94% a edugen wileyplus.com I Hein, Foundations of College Chemistry,5 Paired Exercise 7.9 Your answer is incorrect. Try again. The Japanese symbol for an atom has been written on a piece of copper metal using 99 iron atoms. Calculate the mass of the iron used to create this symbol. g Fe Use correct number of significant digits, the tolerance is +/-2% By accessing this Question Assistance, you will learn while you earn points based on the Point Potential Policy set by your instructor Question Attemptsi 2 of S used SAVE FOR LATER SUBHET ANSWER Earn Maximum Points avalable only if you answer this question correctly in three attempts or less

Explanation / Answer

1 mole of iron contain 6.022140857 × 1023 iron atoms

so 99 iron atoms are

= 99/6.022*10^23

=16.44 *10^-23 moles of iron

molar mass of iron is 55.85 g / mol

a weight of iron used is = 55.85*16.44*10^-23

= 9.182*10^-21 g

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