None. 1 tonne has only one digit and that one digit is a 1.
A ton is often a slang term for a hundred (eg in cricket) and so a ton has 2 zeros.
none
Eight tons = 16,000 pounds. 3 zeros.
5 zeros
15 zeros
A googolplexian is 1 followed by a googolplex of zeros, a googolplex is 1 followed by a googol of zeros and a googol is 1 followed by 100 zeros.
1 googol = 10100 = ' 1 ' with 100 zeros after it.
41duodecillion is a 1 followed by 39 zeros
100 zeros.
9 zeros
1,000,000 SIX ZEROS
9 zeros