Answer:
pH = 9.2
Explanation:
pH+pOH=14
But pOH= -log[OH]= -log[1.58×10^-5]= 4.8
We can now say
4.8+pH= 14
pH= 14-4.8= 9.2
Nₐ=6.02*10²³ mol⁻¹
n(Na₂O)=0.5 mol
n(Na⁺)=2n(Na₂O)
N(Na⁺)=n(Na⁺)Nₐ=2n(Na₂O)Nₐ
N(Na⁺)=2*0.5*6.02*10²³=6.02*10²³ ions
<span>you only have one number
so taking the number of atoms given to you 6million
is there a conversion factor that relates the number of atoms ......to 1 mole?</span>
A system that releases heat to the surroundings, an exothermic reaction, has a negative ΔH by convention, because the enthalpy of the products is lower than the enthalpy of the reactants of the system. The enthalpies of these reactions are less than zero, and are therefore exothermic reactions