Answer to Question #80996 in General Chemistry for rayann

Question

2. A student records the following laboratory measurements using the same equipment that you used in lab. What is wrong with each of these values as recorded?

Answer 1

Answer: the mass is written down to the first digit after the comma, leaving the measurement error as +/-, that is, it will be more accurate to write so: mass of penny = 2.5+/-0.01 g. Next, the volume is written down to two significant digits after the decimal point. The remaining two digits go to the accuracy record, that is volume in graduated cylinder = 37.51+/-0.0024 mL. The thickness of the case is the same as with the mass, that is, thickness of penny = 1.2+/-0.07 mm.