Which reactions are redox reactions? check all that apply. check all that apply. 4li(s)+o2(g)→2li2o(s) mg(s)+fe2+(aq)→mg2+(aq)+fe(s) pb(no3)2(aq)+na2s?

The reaction s that are redox reactions are

4Li(s) +O2 (g)→ 2Li2O (s)\

Mg(s) +  Fe2+ (aq)→ Mg2+(aq) + Fe(s)

A redox reaction involve both oxidation and reduction. During redox reaction there is change in oxidation states. For example in

4Li +O2 →2Li2O  Li is oxidized  while O  is  reduced

in  Mg +Fe2+ → Mg2+ +Fe   Mg is oxidized since it move from oxidation state 0 to 2+ while Fe2+ is reduced since it move from oxidation state of 2+ to 0

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.

b.false that your answer