Chemistry, 29.07.2019 19:00 alyssavwil233
Your boss tells you that she needs a decision by the end of the day about the machine you want to purchase for your new operation. you have four options, and your boss reminds you to be as cost-efficient as possible but that she also wants the best efficiency. which is your best option? option 1: this $5,000 machine is supplied energy at a rate of 1,900 w and does useful work at a rate of 1,786 w. option 2: this $4,500 machine is supplied energy at a rate of 1,450 w and does useful work at a rate of 1,300 w. option 3: this $4,750 machine is supplied energy at a rate of 1950 w and does useful work at a rate of 1833 w. option 4: this $4,750 machine is supplied energy at a rate of 2,000 w and does useful work at a rate of 1,822 w. a. option 1 b. option 2c. option 3 d. option 4
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An atom of lithium-7 has an equal number of(1) electrons and neutrons(2) electrons and protons(3) positrons and neutrons(4) positrons and protons
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Consider the reduction reactions and their equilibrium constants. cu+(aq)+e−↽−−⇀cu(s)pb2+(aq)+2e−↽−−⇀pb(s)fe3+(aq)+3e−↽−−⇀fe(=6.2×108=4.0×10−5=9.3×10−3 cu + ( aq ) + e − ↽ − − ⇀ cu ( s ) k =6.2× 10 8 pb 2 + ( aq ) +2 e − ↽ − − ⇀ pb ( s ) k =4.0× 10 − 5 fe 3 + ( aq ) +3 e − ↽ − − ⇀ fe ( s ) k =9.3× 10 − 3 arrange these ions from strongest to weakest oxidizing agent.
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Chemistry, 22.06.2019 14:30
Ahypothesis must be testable and falsifiable to be considered scientific a. trueb. false
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Chemistry, 22.06.2019 14:30
How can carbon move from "land" to bodies of water? describe the way human impact has lead to increased levels of co2 in the atmosphere.
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Your boss tells you that she needs a decision by the end of the day about the machine you want to pu...
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