E Electrons Full Member 10+ Year Member 15+ Year Member Joined Jun 12, 2007 Messages 200 Reaction score 0 Points 0 Pre-Dental Oct 19, 2007 #1 Advertisement - Members don't see this ad If 10 cubic cm of 20% basic is mixed with 20 cubic cm of 40% basic, the percent of basic in the mix is? Answer: 33 1/3 How is this setup? Why is it not this? 1000(.2) + 8000(.4) = 9000 X
Advertisement - Members don't see this ad If 10 cubic cm of 20% basic is mixed with 20 cubic cm of 40% basic, the percent of basic in the mix is? Answer: 33 1/3 How is this setup? Why is it not this? 1000(.2) + 8000(.4) = 9000 X
F faerielynx Full Member 10+ Year Member 15+ Year Member Joined Aug 26, 2007 Messages 55 Reaction score 0 Points 0 Dental Student Oct 19, 2007 #2 Not sure, but: .2 x 10 = 2 .4 x 20 = 8 Total (Part) = 10 Original Total = 10 + 20 = 30 %= Part/Original %= 10/30 = 1/3 = 33.3 cubic cm Upvote 0 Downvote
Not sure, but: .2 x 10 = 2 .4 x 20 = 8 Total (Part) = 10 Original Total = 10 + 20 = 30 %= Part/Original %= 10/30 = 1/3 = 33.3 cubic cm
D Dedier Full Member 10+ Year Member 15+ Year Member Joined Oct 18, 2007 Messages 27 Reaction score 0 Points 0 Pre-Dental Oct 19, 2007 #3 cubic cm | % basic | total 10% soln 10 | .20 | 10(.2) 20% soln 20 | .40 | 20(.4) mixture 30 | x | 20(.4) + 10 (.2) 30x = 10, x=33 1/3 Upvote 0 Downvote
cubic cm | % basic | total 10% soln 10 | .20 | 10(.2) 20% soln 20 | .40 | 20(.4) mixture 30 | x | 20(.4) + 10 (.2) 30x = 10, x=33 1/3
E Electrons Full Member 10+ Year Member 15+ Year Member Joined Jun 12, 2007 Messages 200 Reaction score 0 Points 0 Pre-Dental Oct 19, 2007 #4 I think you guys nailed it. Thanks. Stupid me, I dunno why I tried to convert the "cubic" then divide. Upvote 0 Downvote
I think you guys nailed it. Thanks. Stupid me, I dunno why I tried to convert the "cubic" then divide.
