The substances sodium (na), oxygen (o2), and sodium oxide (na2o) participate in this chemical reaction: 4na + o2 ? 2na2o. which statement best describes the reaction? a. elements rearrange, but no compounds are created or destroyed. b. sodium oxide is created by the chemical reaction. c. atoms from sodium oxide rearrange to form sodium and oxygen. d. in a mixture of the three substances, sodium oxide separates from the sodium and oxygen.

Here we have to choose the best statement, among the given, in the chemical reaction between the substance sodium (Na) and oxygen (O₂) to form Na₂O.

The suitable statement is sodium oxide is created by the B. chemical reaction.

The reaction between Na and O₂ is 4Na + O₂ = 2Na₂O.

The compound Na₂O is entirely is a new compound and not generated by the rearrangement of the reactant. Here the sodium and oxygen is destroyed and forms Na₂O.

There is no separate atoms in Na₂O it is a compound made by the two atoms Na and O₂.

In a mixture of the three substances sodium oxide can be separated from Na and O₂ but it depends upon the physical property of the reactant and product. If the reactant and product both are in gaseous state they cannot be separated by any physical methods.

the ideal gas law equation is as follows

pv = nrt

where p - pressure

v - volume

n - number of moles

r - universal gas constant

t - temperature

so if the pressure, volume and temperature are already known

we are left with n and r

since r is the universal gas constant that has a known fixed value then r too is known

so we are left with 'n'

once we know temperature volume and pressure

we can find the number of moles of gas present using the ideal gas law equation

this is not my own answer, this is an answer for the same question by the user blahblahmali. i do not claim ownership of this account.