1) Which of the following would give the most precise volume measurement? a) A 1
ID: 860204 • Letter: 1
Question
1) Which of the following would give the most precise volume measurement?
a) A 10mL graduated cylinder with markings every 1mL
b) A 10mL Pipet markings every 0.1 mL
c) A 50 mL Buret with markings every 0.2 mL
d) A 100mL graduated cylinder with markings every 10mL
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2) A mixture of just sodium chloride and sand was subjected to a separation much like the one you did in lab.If a 2.0035g mixture was separated to isolate 1.6035g of sodium chloride, and 0.2904g of sand, what is thepercentage of sodium chloride with the correct number of significant figures?
a) 80.0349%
b) 80.0%
c) 80.035%
d) 80.03%
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3) A student analyzing 2.000g of Epsom Salt found that it contained 39.0% by mass water. What is the hydration number for this sample?
a) 6
b) 5
c) 7
d) 4
Explanation / Answer
c) A 50 mL Buret with markings every 0.2 mL
a) 80.0349%
d) 4
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