Pure hydrogen does not occur naturally on Earth in large quantities, and it is locked up in enormous quantities in water, hydrocarbons, and other ______. One of the challenges of using hydrogen as a fuel comes from being able to efficiently extract hydrogen from these compounds (化合物).
organic matter
举一反三
- ( ) are organic compounds that are chemically based on carbon, hydrogen and other nonmetallic elements.
- A Chemist can _the oxygen from hydrogen in water.
- Water ________ hydrogen and oxygen.
- Water is ____________ of hydrogen and oxygen.
- Ways to produce hydrogen fuel include producing it from nuclear power, biomass, algae, artificial photosynthesis, direct solar and coal gasification.
内容
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Water __________ oxygen (氧) and hydrogen (氢).
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---Why does the river smell terrible? ---Because large quantities of water _______
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Asolarcarisanelectriccarpoweredby______electricity. A: sun B: hydrogen C: pure D: solar
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Manufacturers of hydrogen generators have developed methods to use lower amounts of electricity to split water into hydrogen. Different electrolytes or catalysts are used in _______ the bonds between hydrogen and oxygen atoms that make up water.
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are non capable of being regenerated. A: Solar cell B: Nonrenewable materials C: Hydrogen fuel cell D: Wind energy