It is a physical change because you can not put it back like it was
E=mc (square) E= mass times capacity squared
The effects<span> of A</span>nthrax<span> on the </span>body<span> include, shock, difficulty breathing, and intestinal inflammation. In serious cases, A</span>nthrax<span> can lead to inflammation of the areas surrounding the brain, and spinal cord, causing severe bleeding. This illness could also lead to death.
I hope this helps!</span>
Answer:
- <u><em>1.7 × 10³ kg of ore.</em></u>
Explanation:
Call X the amount of aluminum ore mined to produce 1.0 × 10³ kg the aluminum metal.
Then, taking into account the yield of the reaction (82 % = 0.82) and the percent of aluminun in the ore (71% = 0.71), you can write the following equation:
- X × 71% × 82% = 1.0 × 10³ kg
↑ ↑ ↑ ↑
(mass of ore) (% of Al in the ore) (yield) ( Al metal to obtain)
You must just simplify, solve and compute:
- X = 1,000 / (0.71 × 0.82) = 1,000 / 0.5822 = 1,717.6 Kg
Round to two significant figures; 1,700 kg = 1.7 × 10³ kg of ore ← answer.
