Which one of the following is not a valid expression for the rate of the reaction below? 4nh3 + 7o2 → 4no2 + 6h2o which one of the following is not a valid expression for the rate of the reaction below? 4nh3 + 7o2 4no2 + 6h2o 16 δ[h2o]δt 14 δ[no2]δt - 14 δ[nh3]δt - 17 δ[o2]δt all of the above are valid expressions of the reaction rate.

Answer : All of the above are valid expressions of the reaction rate.

Explanation :

The given rate of reaction is,

The expression for rate of reaction for the reactant :

The expression for rate of reaction for the product :

From this we conclude that, all the options are correct.

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.

answer:

the answer is 6 valence electrons.

explanation:

valence is the # of electrons on the outer most shell of an atom.

oxygen has 6.

although, the valency of oxygen is 2, because it only needs to make 2 covalent bonds, or gain 2 electrons, to achieve the stable octet configuration of a noble gas.

that's it!

if you need further assistance, let me know: )

~ trueboss72