The change in the standard Gibbs free energy (ΔGº) for the dissociation of nitrous acid (HNO2) at 298 K is 19.09 kJ. If the pH of the solution after equilibrium is reached is 1.30 and the NO2 – concentration at equilibrium is 0.00060 M. What is the equilibrium concentration of HNO2? Hint: Use pH to determine the equilibrium concentration of H+ .
HNO2(aq) H + (aq) + NO2 – (aq)
75km/hr
A car traveling with constant speed travels 150km in 7200 s. What is the speed of the car
The heat of fusion for water is the amount of energy needed for water to :
c.melt
Answer:
2Atoms
Explanation:
in 
There exist 2 atoms of nitrogen, 4 atoms of hydrogen and three atoms of oxygen. so the answer is 2atoms