Question

A) Câți moli se găseac in 80g de CH4(gaz metan)
B)Câți moli reprezintă 30,115×10 la puterea 22 molecule dr H2O
Va rog ajutati-mă ! Dau coroana !!!

Answer 1

CH4
M=12+4=16
16 g CH4---------1 mol CH4
80 gCH4----------X moli CH4
X=80:16=5 moli CH4



H2O
M=2 +16=18
18 g H2O------1mol H2O
                                        23
1mol H2O---------6,023.10    molecule
                                         23
y moli--------------30,115.10    molecule
                   23               23
y=30,115.10    :6,023.10    =5 moli H2O