Verified answer

2. How many letters are there in the English alphabet?

3. How much beef is there in a hamburger?

4. How many vowels are there in English?

5. How many cents are there in a euro?

6. How much water is there in a 25-metre swimming pool?

7. How much juice is there in ten kilos of oranges?

8. How much sugar is there in one can of cola?

Many - когда исчисляемое существительное (letters, cents), much - когда неисчисляемое (water, sugar).

Надеюсь, помогла Вам. ^^