Question

Which of the following element contains the least moles of atoms in a 1.0g sample? Explain your decision. A.N B. Co C.Ga D.Ca E.Br

Answer 1

Which of the following element contains the least moles of atoms in a 1.0g sample? Explain your decision.

a) N (Fw= 14.01 g/mol and 1mol/6.022_x10²³ atoms), 1g of N = 4.30_x10²² atoms

b) Co (Fw= 58.93 g/mol and 1mol/6.022_x10²³ atoms), 1g of Co = 1.02_x10²² atoms  

c) Ga (Fw= 69.72 g/mol and 1mol/6.022_x10²³ atoms), 1g of Ga = 8.64_x10²¹ atoms

d) Ca (Fw= 40.08 g/mol and 1mol/6.022_x10²³ atoms), 1g of Ca = 1.50_x10²² atoms

e) Br (Fw= 79.90 g/mol and 1mol/6.022_x10²³ atoms), 1g of Br = 7.54_x10²¹ atoms

R/ e) Br. The selection is due to that one gram mole of bromine are less content of atoms , that one gram of the other substances.