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)
The total mass is 10.57+6.96=17.53 g.
So, the percent by mass of magnesium is (10.57)/(17.53) * 100 = <u>60.3%</u>
<u />
The percent by mass of oxygen is (6.96)/(17.53) * 100 = <u>39.7%</u>
Tin is the shortest chemical element on the Periodic Table.
Someone’s initials i think
There had been new discoveries of chemicals that have been added to the periodic table in recent years
