Answer:
The average speed must be 30mph so this means the car traveled for 2hrs 60/30
The charge on one mole of electrons = 96485 C = 1 Faraday
so if charge is 96485 C the moles of electrons are 1 = 6.023 X 10^23 electrons
if charge is 1 C the number of electrons = 6.023 X 10^23 / 96485
If charge is 50 micro C the number of electrons
= 6.023 X 10^23 X 50 X 10^-6 / 96485
= 3.12 X 10^14 electrons
Answer: B The speed of the object is equal to zero
Explanation:
Chemical equation:
Pb(NO3)2(aq) + 2NH4I(aq) -->PbI2(s) + 2NH4NO3(aq)
Precipitate:
PbI2 (because it's a yellow insoluble solid)
Complete Ionic Equation:
Pb(aq) + 2NO3(aq) + 2NH4(aq) + I2(aq) --> Pb(s) + I2(s) + 2NH4(aq) + 2NO3(aq)
Net ionic equation:
Pb(aq) + I2(aq) --> Pb(s) + I2(s)
Let me know if there are any errors. Goodluck :)
Explanation:
To calculate [H3O+] in the solution we must first find the pH from the [ OH-]
That's
pH + pOH = 14
pH = 14 - pOH
To calculate the pOH we use the formula
pOH = - log [OH-]
And [OH-] = 5.5 × 10^-5 M
So we have
pOH = - log 5.5 × 10^ - 5
pOH = 4.26
Since we've found the pOH we can now find the pH
That's
pH = 14 - 4.26
pH = 9.74
Now we can find the concentration of H3O+ in the solution using the formula
pH = - log H3O+
9.74 = - log H3O+
Find the antilog of both sides
<h2> H3O+ = 1.8 × 10^ - 10 M</h2>
The solution is basic since it's pH lies in the basic region.
Hope this helps you
