you dispense 10.00ml of water from a burette, and the water has a mass of 9.941 grams

Question

A what volume of water did you actually dispense 

B what is your error in this measurement.

Answer 1

For this question, you need to know that water has a density of 1 g/mL.  So if you meant to dispense 10.00 mL of water, but the dispensed water only had a mass of 9.941 g, then you only actually dispensed 9.941 mL of water. 

 

9.941 g water * (1 g/mL) = 9.941 mL

 

You meant to dispense 10.00 mL.  So the measurement was off by 10.00 mL - 9.941 mL or 0.059 mL.

 

0.059 mL / 10.00 mL = 0.0059.  So your percent error was 0.59%.