1A-3-1. The amount of acid present in a sample was measured several times and the average value was determined to be 3601.2 mg, with an uncertainty of +30 mg. To how many significant figures should the average be reported?
A. 2, B. 3, C. 4, D. 5
1A-3-2. What is the proper way of reporting the temperature shown on the thermometer scale (Celsius) below?
A. 30 oC , B. 30.0 oC , C. 30.00 oC, D. 3.0x101 oC
1A-3-3. Five replicate measurements of the calcium content of a sample yielded the following results: 5.042%, 5.131%, 5.434%, 4.852%, 4.728%.
To how many significant digits should the average be reported?
A. 1, B. 2, C. 3, D. 4
