2007-09-29 11:59:19 · 9 answers · asked by alphajoe 1 in Science & Mathematics ➔ Engineering
10.5 pounds
2007-09-29 12:01:15 · answer #1 · answered by Mik 4 · 6⤊ 0⤋
5.25% as a decimal fraction = 5.25/100 = 0.0525.
Multiply this by the mass of the alloy: -
0.0525 x 200lbs = 10.5 lbs copper.
2007-09-29 14:22:20 · answer #2 · answered by Norrie 7 · 3⤊ 0⤋
200 x 5.25% = 10.5 pounds.
2007-09-29 12:01:55 · answer #3 · answered by Stuart 7 · 2⤊ 0⤋
Don't be so sure all those other answers are correct. You need to figure out what the units of the percentage are before you can figure out the mass of copper in 200 pounds.
If the percentage is by volume you will need to know the density of copper to convert the volume to percent mass.
Otherwise if the percentage is by mass, just multiply the percent by the total mass to get the answer.
If no indication is given of what the percentage is, tell your teacher that not enough information was given and that he/she assigned a bad problem.
2007-09-29 12:40:45 · answer #4 · answered by Nickoo 5 · 0⤊ 4⤋
200 x .0525 = 10.5 LB
2007-09-29 12:20:11 · answer #5 · answered by mechnginear 5 · 2⤊ 0⤋
1.05 pounds given that the certain alloy peice that contained 5.25% weighed 1 pound.
2007-09-29 12:02:41 · answer #6 · answered by Anonymous · 1⤊ 4⤋
10.5 is the answer I'm sticking with.
2007-09-29 12:01:59 · answer #7 · answered by Bob Thompson 7 · 2⤊ 0⤋
help
2015-03-15 13:50:13 · answer #8 · answered by Charles Gayle 1 · 0⤊ 0⤋
Do your HW!
2007-09-29 12:01:54 · answer #9 · answered by Anonymous · 1⤊ 2⤋