Buy Concentration Changes With Temperature

Buy Concentration Changes With Temperature
Buy Concentration Changes With Temperature
Which of the following measures of concentration changes
with temperature?
(A) Mole fraction
(B) Mass fraction
(C) Mass percentage
(D) Molality
(E) Molarity
441. Which of the following pieces of laboratory glassware would be
used to most accurately transfer a 10.00-mL sample of
(A) 5-mL pipet
(B) 10-mL pipet
(C) 10-mL graduated cylinder
(D) 15-mL graduated cylinder
(E) 15-mL Erlenmeyer flask
442. A student determined the density of a pure liquid at 25°C by
measuring its mass with an electronic balance and measuring
its volume in a clean, dry 50.00-mL volumetric flask. On the
basis of this information and the measurements shown in the
table below, to how many significant digits should this density
be reported?
(A) 2
(B) 3
(C) 4
(D) 5
(E) 6
443. A student weighs out 0.20 mol of glucose to prepare a 2-M
glucose solution. Which of the following pieces of laboratory
equipment is most appropriate for preparing this solution?
(A) 100-mL graduated cylinder
(B) 1-L graduated cylinder
(C) 1-L Erlenmyer flask
(D) 100-mL volumetric flask
(E) 1-L volumetric flask
444. Which of the following techniques is most appropriate for
recovering solid NH4NO3
from an aqueous solution of
(A) Thin layer chromatography
(B) Evaporation
(C) Distillation
(D) Filtration
(E) Titration
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