One problem with fuel-cell cars is that ________ gas is not readily available in pure form.

what are the challenges facing in fuel cell in energy technology

A hydrogen-powered car creates no pollution when the car is driven; however, using this alternative fuel poses many challenges. Which of the following choices is not one of them?A.Hydrogen gas is not naturally available in large quantities.B.New fueling stations that can handle hydrogen would have to be built.C.Hydrogen is highly reactive.D.The combustion of hydrogen is too violent to be useful to the public.SUBMITarrow_backPREVIOUS

We cannot continue to use petrol for cars because it is not ----------------1 pointsustainablefinishedendedcurable________________ happens when the green land becomes desert.1 pointDeforestationDesertificationDesertsDessertsIf more communities had a wind turbine, they would have ________________ cleaner energy.1 pointexpensivecheappreciouspricelessThese  energy  _________  light bulbs use a lot less electricity than the ones we used to have1 pointto savesavedsavesavingWe can use that bag again. It is ------------------1 pointrechargeablereusableusabledisposableWe add __________ to form the opposite of “connect”.1 pointunindisilThe story was about a superhero who had special _________________. He could carry a heavy car.1 pointstagelowerpowerspointAhmed __________________ like Cheese, but he loves it now!1 pointdidn't use toused touses towas used toWhich of these might you use to travel ___________ one place to another? ..1 pointtooffrominCan I plug in these  _________  batteries? I need to charge them.1 pointchangechargerechargeabledamagedA _________________ is a plant that is grown in large quantities.1 pointplantplanetcroplamb______________________ means everything you can see when you look across a large area of land.1 pointLandslideLandmarkLandscapeLandfillIf we have rising sea ________, is the sea getting higher or lower?1 pointfishwhalesshipslevels__________ means very big.1 pointEnormousaggressiveprogressiveAtomTo ____________ is to make things to be sold .1 pointproducededuceintroduceconfuseThe Great Green Wall will plant millions of __________1 pointtreestresstourstears________________________is the he process of becoming or making something desert1 pointDeforestationDesertificationDesertsDessertsThe truck ________________ the car totally. It was a horrible accident.1 pointset updestroyedavoidedsawTo ____________________ is to damage something so badly that you can't repair it .1 pointdestroyset upestablishbuildWe can add _________ to form the opposite of renewable.  1 pointnonnonedisunClimate change is creating more _______________ in the Sahel region every year.1 pointicesnowdroughtdryWe add the prefix _________ to the word expensive to mean cheap .1 pointilinimdisThis building ___________________white, before they painted it blue.1 pointuse to beused to haveuses to beused to beThe initiative was set ________ in 2007 .1 pointinonupofIf all businesses had ________________ on their buildings, they would save money.1 pointSolar panelspetrol stationsspaceshipsshipsIf we planted more trees and …............. , we could help the environment.1 pointsoupcartsseedlingssugarA ________________ a young plant that has grown from seeds .1 pointtreeshipseedlingseedThe things that use the most electricity in a home are __________________________1 pointenergy saving light bulbhot waterrechargeable batteriesair conditioning and heatingTo _____________ ,you say when will do something.1 pointpromisetellsayaskWe should build a _________ world where there is less pollution.1 pointgarlicbrowngreenergrayerMy little brother ______________________not to play football in the house.1 pointsaidpromisedtoldreportedPlastic, glass and metals can be _________.1 pointcycledbicyclebikerecycledIn some countries, it _______________________ rain in the summer as much as it does now.1 pointuse towere used toused toused to be

What is the fuel used in a fuel-cell automobile?A.Hydrogen gasB.Solar energyC.Fossil fuelsD.Water vapor

Which of the following would be considered a fuel cell?Group of answer choices2Fe(s) + O2(g) + 4H+(aq) → 2Fe2+(aq) + 2H2O(l)Zn(Hg) + HgO(s) → ZnO(s) + Hg(l)C3H8(g) + 5O2(g) → 3CO2(g) + 4H2O(l)Pb(s) + PbO2(s) + 4H+(aq) + 2SO42-(aq) → 2PbSO4(s) + 2H2O(l)Zn(s) + 2NH4+(aq) + 2MnO2(s) → Zn2+(aq) + 2NH3(aq) + H2O(l) + Mn2O3(s)