Chemistry, 10.10.2019 02:30 perezsamantha3oqr0za
Asmall electrical energy storage system is based on a 50-w pem fuel cell (mass 350 g, efficiency operating at an average efficiency of 45%) and a number of metal hydride hydrogen storage canisters each capable of storing up to 1.5 wt% hydrogen with an uncharged mass of 125 g (a 100% full canister includes the mass of canister plus hydrogen here). at what minimum total electrical energy delivery capacity would this system have a system gravimetric energy density advantage over a battery bank based on a number of lithium polymer batteries, each weighing 80 g and rated at 1800 mah with a nominal voltage of 7.4 v? assume an 80% depth of discharge for each battery and a 10% drop in voltage, linear with usage, during discharge. consider just whole numbers of mh canisters and batteries. at the gravimetric energy density crossover point, how many mh canisters would the hydrogen fuel system employ and how many batteries (rounded to the nearest whole numbers)?
Answers: 3
Chemistry, 22.06.2019 05:00
Given sno2 + 2h2 - sn + 2h20 tin oxide reacts with hydrogen to produce tin and water. how many moles of sno2 are needed to produce 500.0 grams of sn?
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Chemistry, 23.06.2019 01:00
Which statement best describes isomers? a. isomers are alcohols that have the same functional group. b. isomers have at least one carbon-carbon double bond. c. isomers have the same molecular formula but different structural properties.
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Chemistry, 23.06.2019 04:00
Calculate the mass of 0.750 mol of the following substance. na3po4. , i'm not quite sure on how to set up the problem to solve! : (
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Asmall electrical energy storage system is based on a 50-w pem fuel cell (mass 350 g, efficiency ope...
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