Yes.
Yes, the word "flash" is a closed syllable because it ends with a consonant sound "sh" and does not have a vowel sound following it in the same syllable.
No?
Yes.
A closed syllable is one that has a coda.For example; add/a:d/.
close
Yes. Please see the related link for help with syllable counting.
No, open.
Yes.
1 Syllable
Yes.
Yes.
Yes.