Answer :
0.250 moles of o2 is needed .
What is moles?
A mole is merely a measuring unit. In reality, it is one of the International System of Units' seven foundation units (SI). When existing units are insufficient, new units are created. Chemical reactions frequently occur at levels where using grammes would be inappropriate, but using absolute numbers of atoms/molecules/ions would also be misleading. As a result, scientists devised the mole to bridge the gap between extremely small and extremely huge numbers.
In the International System of Units, the mole (sign mol) is the unit of material amount. The amount of substance is a measurement of how many elementary entities of a certain substance are present in an object or sample. The mole is defined as having 6.022140761023 elementary entities.
The number of moles of
P4O10
can be obtained by dividing the given mass by the molecular weight of the compound:
mol P4O10=14.2
g×mol284g=0.05mol
The balanced chemical equation is:
P4+5O2→P4O10mol
O2=0.05
molP4O10× mol
O21 mol
P4O10=0.25 mol
0.250 moles of o2 is needed
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