No, it will not be hard.
Mathematics and physics are both required for computer science and computer engineering degrees; chemistry might not be, depending upon your individual school.
You HAVE to be good at mathematics to be good at chemistry, physics and engineering. It's not a handicap, it's a necessity.
For Physics and Engineering yes, but not so much for Chemistry.
Apparently, you haven't had much exposure to Physics, Chemistry, or Engineering, have you. Yes, they all do. In increasing order of mathematical intensity, they are Chemistry Engineering Physics
No, it is not true. It is false. In order to PASS physics, chemistry, and engineering, you must be pretty good at mathematics.
chemistry, physics and mathematics. further mathematics is desired but not a necessity.
mainly physics, chemistry and mathematics will get you in any engineering field
Yes it is a possibility. There is no competition for a Pullitzer in Physics, Chemistry, or Engineering.