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What iteams contain hydrogen?

Updated: 8/17/2019
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15y ago

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Many molecules contain hydrogen as an element, such as water (H2O), sulphuric acid (H2SO4) and methane (CH4). However, hydrogen existing as a pure gas, H2, takes up about 70% of the air we breathe, is very flammable and also used in blimps.

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15y ago
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Q: What iteams contain hydrogen?
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