Answer:
I believe that would be 100 mph.
Explanation:
Your distance (d) is 500 miles and your time (t) is 5 hours.
So when you replace the variables with numbers you bet 500/5 which is 100.
Therefore, you speed (S) would be 100mph.
Answer : The number of moles of
formed are, 0.69 moles.
Explanation : Given,
Moles of
= 0.345 mol
Now we have to calculate the moles of 
The balanced chemical equation is:

From the balanced reaction, we conclude that
As, 1 mole of
react to give 2 moles of 
So, 0.345 mole of
react to give
mole of 
Therefore, the number of moles of
formed are, 0.69 moles.