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hoa [83]
3 years ago
8

In the scientific method, why is it important to keep track of data?

Chemistry
2 answers:
LuckyWell [14K]3 years ago
5 0
So you can compare them with the results at the end
zvonat [6]3 years ago
4 0
Everything compares at the end
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H₂ is excess reactant and O₂ the limiting reactant

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Based on the chemical reaction:

2H₂(g) + O₂(g) → 2H₂O

<em>2 moles of H₂ react per mole of O₂</em>

<em />

To find limiting reactant we need to convert the mass of each reactant to moles:

<em>Moles H₂ -Molar mass: 2.016g/mol-:</em>

10g H₂ * (1mol / 2.016g) = 4.96 moles

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0.69mol O₂ * (2mol H₂ / 1mol O₂) = 1.38 moles of H₂

As there are 4.96 moles,

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