Elements in the third row can break the octet rule
Answer:
I needed to use good precision in my measurement for my chemistry lab
Explanation:
Their should be two molecules of hydrogen (h2) to produce 2 moles of h2O2
One mole of water weighs 18 grams. H₂O is composed of 2H= 2 and 1 0=16 adding gives you 18. number of moles= mass/ Relative Molecular Mass
Therefore, mass= Relative Molecular Mass×number of moles
= 18×5 moles
= 90 grams
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