Question

CHM 100-002 Intro Chem - Thurs. Afternoon Lab Hi, step 7 Chemical Quantities m 7.22 the mass in grams for each of the Part A 5.27 mol of AI Express your answer using three significant figures DVD AED O ? Submit Submit Part B DE AES o

Answer 1

A) No of mol of Al = w/M.wt = 5.27 mol

   w = weight of Al = ?

   M.wt = atomic weight of Al = 27 g/mol

5.27 = w/27

w = 142.30 g

B)
No of mol of Cu = w/M.wt = 0.95 mol

   w = weight of Cu = ?

   M.wt = atomic weight of Cu = 63.5 g/mol

0.95 = w/63.5

w = 60.32 g

c)
No of mol of MgBr2 = w/M.wt = 3.67 mol

   w = weight of MgBr2 = ?

   M.wt = molecular weight of MgBr2 = 184 g/mol

3.67 = w/184

w = 675.28 g

D)

No of mol of C2H6O = w/M.wt = 0.17 mol

   w = weight of C2H6O = ?

   M.wt = molecular weight of C2H6O = 184 g/mol

0.170 = w/46

w = 7.82 g

E)

No of mol of (NH4)2SO4 = w/M.wt = 1.83 mol

   w = weight of (NH4)2SO4 = ?

   M.wt = molecular weight of (NH4)2SO4 = 132.14 g/mol

1.83 = w/132.14

w = 241.82 g