I seemingly can't solve the following problem, I've spend over 30 mins on it, no progress, can any of you geniusses give a step by step solution to me? Thank you so much
A mixture of aluminium and iron weighing 9,62g reacts with hydrogen chloride in aqueos solution according to the parallel reactions
2Al + 6HCL --> 2AlCl3 + 3H2 Fe + 2HCL --> FeCl2 + H2
A 0,0738 quantity of hydroen is evolved when the metals react completely. Calculate the mass of iron in the original mixture.
Here's the solution I found on Slader.com
1) x + y = 9.62g; Considering that x is a mass of Al, and y is the mass of Fe
5) 0.0556x + 0.0377y = 0.366
x + y = 9.62 (multiplying with 0.0566)
0.0566x + 0.0566y = 0.535
Substracting this two equations
0.0377y = 0.169
y = 4.48 g Fe
6) x + 4.48 = 9.62
x = 5.14 g Al
Can someone explain step 5 to me? I really don't understand how one gets the "0.0377y = 0.169".
Thanks so much!!