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Mol Fe:
Massa= n. Mr
2,8=n. 56
n= 0,05 mol
Karena perbandingan koefisien, maka mol H2 = 3/2 mol Fe = 0,075 mol
Vstp= n. 22,4
Vstp= 0,075 . 22,4 = 1,68 L
7.
Mol CuO:
2=n. 79,5
n= 0,025 mol
Karena perbandingan koef, maka mol CuO = mol Cu = 0,025 mol
Massa= 0,025 . 63,5= 1,5875 gram
8.
Mol Na2CO3 :
5,3=n. 106
n=0,05 mol
Karena perbandingan koef maka, mol Na2CO3 = mol CO2 = 0,05 mol
n1/V1 = n2/V2
(1/30)/1 = 0,05/V2
1/30= 0,05/V2
V2= 1,5 L