Please answer the two following question!!! I need your help! it is General Chem

Question

Please answer the two following question!!! I need your help! it is General Chemsity:

In the combustion of hydrogen gas, hydrogen reacts with oxygen from the air to form water vapor. hydrogen + oxygen rightarrow water If you bum 51.0 g of hydrogen and produce 456 g of water, how much oxygen reacted? Number g Balance the following combustion reaction in order to answer the following questions. Use lowest whole-number coefficients. C2H4 + 3O2 rightarrow 2CO2 + 2H2O Tip: If you need to clear your work and reset the equation, click the button that looks like two red arrows. You are given 3.5 moles of O2 to react with 1.20 x 102 g C2H4. Upon completion of the reaction, will there be any remaining C2H4? Yes, there will still be C2H4 remaining, No, all C2H4 will be used up in the reaction.

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