Question

7. An ore sample weighing 8.60 kg is found to contain 1.40 kg of copper. a) Calculate the percent copper in the ore. Problem-solving: b) Write the percent value from a) into two conversion factors. __________% Cu % value Two conversion factors _________% Cu (from the answer a) or c) How many kg of copper are there in 125 kg of ore? Solve this by factor-label method using a conversion factor in part b). Problem-solving: _________kg Cu

Answer 1

Answer:

metric ton= 2204.62262 pounds

step one:

8.60/ 1.4 = 2204.62262(2)/ x

step 2: 8.60/1.40= 4409.24524/x

step 3: 8.60(x)= 4409.24524(1.40)

step 4: 8.60(x)= 6172.943336

step 5: 8.60(x)/8.60= 6172.943336/8.60

step 6: x= 717.7841088372093 or 717.78 pounds of copper in 2.00 tons of ore.