Can you determine the pH of a 1 liter solution having an H concentration of 1.0*10 to the negative 3.5

Isn't 1.0*10^-3.5 the same as ]

10^-3.5?
Punch in 10 on your calculator, raise it to the power of -3.5. I get 3.16E-4.
So pH = -log(3.16E-4) = -(-3.5) = 3.5
Or you could remember that is 10^-pH.
10^-3.5.