9y - 77 = 12x - 28
therefore you first need to find x:
7x + 12 = 12x - 28
-5x = -40
x = 8
then you use x = 8
9y - 77 = 12×8 - 28
9y = 96 - 28 + 77
9y = 145
y = 16.11
I don't understand the question being answered can you clarify?
Hi! The reaction is the following one:
2Al + 3CuCl₂ → 2AlCl₃ + 3Cu
So if you want to know the grams of copper (II) chloride needed (you can't react the copper metal with aluminum metal. It should be the copper (II) chloride), you should use the following conversion factor, using the molar masses of the reagents:
So, the amount of CuCl₂ needed to react an entire 35-gram sample of aluminum would be 261,62 g CuCl2
<span>A. tall dense forests of broadleaf trees
B. coniferous forests, temperate grasslands, and agriculture
C. forests, alpine tundra, mosses, lichens, shrubs, permafrost
D. deciduous forests, coniferous trees</span>