17
Well, I understand it, but I don't like it. There's an error in line 5 of eq 5.
When you subtract the two equations, put everything in writing:
0.0556x + 0.0377y - 0.0566x -0.0566y = 0.366 - 0.535
Then -0.0189y = -0.169, (not 0.0377y = 0.169)
Then y = 8.94g (Fe) (answer)
(And incidentally, x + y = 9.62g, so x = 0.68g (Al))
I sympathize with you - but taking a little shortcut sometimes makes it difficult to detect an error. Sometimes you just have to write out everything.
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VOTE
2026-05-18
Well, I understand it, but I don't like it. There's an error in line 5 of eq 5.
When you subtract the two equations, put everything in writing:
0.0556x + 0.0377y - 0.0566x -0.0566y = 0.366 - 0.535
Then -0.0189y = -0.169, (not 0.0377y = 0.169)
Then y = 8.94g (Fe) (answer)
(And incidentally, x + y = 9.62g, so x = 0.68g (Al))
I sympathize with you - but taking a little shortcut sometimes makes it difficult to detect an error. Sometimes you just have to write out everything.
Well, I understand it, but I don't like it. There's an error in line 5 of eq 5.
When you subtract the two equations, put everything in writing:
0.0556x + 0.0377y - 0.0566x -0.0566y = 0.366 - 0.535
Then -0.0189y = -0.169, (not 0.0377y = 0.169)
Then y = 8.94g (Fe) (answer)
(And incidentally, x + y = 9.62g, so x = 0.68g (Al))
I sympathize with you - but taking a little shortcut sometimes makes it difficult to detect an error. Sometimes you just have to write out everything.
More
VOTE