How many signifcant digits are there in the measurement 167.23560 L?

Answer 1

The measurement 167.23560 L has a total of eight significant digits. All non-zero digits are significant, and any zeros between significant digits or trailing zeros in a decimal number are also counted as significant. Thus, in this case, the digits 1, 6, 7, 2, 3, 5, 6, and the two trailing zeros all contribute to the count.