How many significant figures are in the measurement 2103.2 g?
The problem provides you with the following measurement
The first thing you need to do here is to figure out the number of non-zero digits you have in this measurement.
As you know, non-zero digits are always significant, so right from the start you can say that your measurement has at least
#2103.2 -> "4 non-zero digits: " 2,1,3,2#
Now, your measurement also contains a sandwiched zero, i.e. a zero that follows and is followed by a non-zero digit.
More specifically, you have
#21color(red)(0)3.2 ->#the zero follows a non-zero digit, #1#, and is folowed by a non-zero digit, #3#
Sandwiched zeros are always significant, which means that your measurement has
- four non-zero digits:
- one sandwiched zero