How many molecules of O2 are required to react with 3.00 moles P4? P4+5O2⟶2P2O5
2 answers:
Answer:
molecules of
Explanation:
We have the following balanced equation
According to the stoichiometric coefficients of the reagents for each mole of , 5 moles of
are needed,
We apply a simple three rule to find out how many moles of O2 are required for 3 moles of P4 to react
Now we know that we need 15 moles of so that 3 moles of
reactions
Remember that 1 mole (of any element or substance) is equal molecules
To find out how many molecules of O2 are required we apply a simple rule of three
To react 3 moles of,
molecules of
are required
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Answer:
That the isotope H-1 is the most abundant in nature.
Explanation:
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In this case, since the average atomic mass of an element is computed considering the mass of each isotope and the percent abundance each, for hydrogen we would set up something like this:
Moreover, since the isotope notation H-1 and H-2 means that the atomic mass of H-1 is 1 amu, that of H-2 is 2 amu and the average one is 1.0079 amu, we can infer that the most of the hydrogen in nature is H-1 as the most of it composes the average hydrogen atom.
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