Sove the mole/molar masses problems 1.-How many moles of cobalt (Co) atoms are i

Question

Sove the mole/molar masses problems
1.-How many moles of cobalt (Co) atoms are in 6.00 x 109Co atoms? 2..- Calculate the molar mass of a compound if 0.372 mole ofit has a mass of 152 g. 3.- What is the mass in grams of a single atom of each of thefollowing elements: As, Ne, Ni, Hg? Sove the mole/molar masses problems
1.-How many moles of cobalt (Co) atoms are in 6.00 x 109Co atoms? 2..- Calculate the molar mass of a compound if 0.372 mole ofit has a mass of 152 g. 3.- What is the mass in grams of a single atom of each of thefollowing elements: As, Ne, Ni, Hg?

Explanation / Answer

1) 6.00E9 atoms x (1mol/6.022E23atoms) = 9.963E-15 mol Co 2) 152g/0.372mol = 408.6g/mol 3) 1atom As x (1mol/ 6.022E23 atoms) x (74.9216g/1mol) =1.244E-22g 1atom Ne x (1mol/ 6.022E23 atoms) x (20.179g/1mol) = 3.35E-23 g 1atom Ni x (1mol/6.022E23 atoms) x (58.70g/1mol) = 9.74E-23 g 1atom Hg x (1mol/6.022E23 atoms) x (200.59g/1mol) = 3.331E-22 g

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