Question

A liter of water contains about 3.35•10^25 molecules. A certain river discharges about 2.8•10^8 litter of water every second. About how many molecules does the ...

Answer 1

Answer:
`9.38*10^(33)`

Explanation:

Given: Molecules in a liter of water =
`3.35\cdot10^(25)`

A certain river discharges about
`2.8\cdot10^8` liter of water every second.

Molecules in river =
`3.35\cdot10^(25)*2.8\cdot10^8`

`=3.35\cdot2.8\cdot10^(25)\cdot10^8\\\\= 9.38*10^(25+8)\ \ \ \ [a^m\cdot a^n=a^(m+n)]\\\\= 9.38*10^(33)`

Hence, there are
`9.38*10^(33)` does the molecules in river per second.