Count the sig figs in each. A. 1.6 x 10^-2 mL B. -1.0 x 10^-1 kJ/mol C. 0.008900
ID: 847232 • Letter: C
Question
Count the sig figs in each.
A. 1.6 x 10^-2 mL
B. -1.0 x 10^-1 kJ/mol
C. 0.008900 J
D. 95500. kg
2. A chemist needs to know the mass of a sample of potassium sulfate to 2 significant digits. He puts the sample on a digital scale. The scale reads 00082.1 g. If the measurement is precise enough for the chemist, round it to 2 significant digits. Otherwise, put "no solution"
3. Multiply or divide the following measurements. Be sure each answer is entered in correct number of significant digits.
A. 0.93mol/ L x 2.00L = ______ mol
B. 961.71g / 0.87 mL = _______ g/mL
C. 0.93 g/mL x 2.80 mL = _______ g
4. A chemical engineer must report the average volume of a certain pollutant produced plants under her supervision. Here are the data
Plant. Volume of plant
New Bedford. 7.74L
South Fork. 0.42 L
Doheny. 6.782L
What is the average volume the chemical engineer should report? Make sure answer is in correct significant digits.
5. A chemistry student needs 20.0g of deithylamine for an experiment. By consulting the CRC Handbook of Chemsitry and Physics, the student discovers that the density of deithylamine is 0.706 g . cm ^-3. Calculate the volume of diethylamine the student should put out. Make sure answer is in correct significant digits.
Explanation / Answer
significant figures
A. 2
B. 2
C. 4
D. 5
2)
82
3)
A) 1.86 mol
B) 837
C) 2.60