Download Tutorial 1 How many zeros are significant figures in a measured

Tutorial 1
1. How many zeros are significant figures in a measured
mass of 0.010010 g?
2. The number of significant figures in 0.00230300 m is
_______.
3. The number of significant digits in 200.000 is
___________.
4. What is the average of 0.1707, 0.1713, 0.1720,
0.1704, and 0.1715?
5. What is the standard deviation of the numbers in
question 4?
6. How many significant figures does each of following
numbers have?
a) 200.06
b) 6.030 x 10-4
c) 7.80 x 1010
d) 0.02670
e) 328.0
f) 7000.0
g) 0.00200
7. A batch of nuclear fuel pallets was weighed to
determine if they fell within control guidelines. The
weights were 127.2, 128.4, 127.1, 129.0 and 128.1 g.
Calculate (a) the mean, (b) the median , (c) the range.
8. Calculate the absolute error and the relative error in
percent and in parts per thousand in the following:
Measured value
Accepted value
a) 22.62 g
22.57 g
b) 45.02 mL
45.31 mL
c) 2.68%
2.71%
d) 85.6 cm
85.0 cm
9. Replicate water samples are analyzed for water
hardness with the following results; 102.2, 102.8,
103.1 and 102.3 ppm CaCO3. Calculate (a) the
standard deviation, (b) the relative standard deviation,
(c) the standard deviation of the mean and, (d) the
relative standard deviation of the mean.
10.
Replicate samples of a silver alloy are analyzed
and determined to contain 95.67, 95.61, 95.71, and
95.60% Ag. Calculate (a) the standard deviation, (b)
the standard deviation of the mean, (c) the relative
standard deviation of the mean (in percent) of the
individual results.