Your company is hiring a new lab technician. You are interviewing 4 candidates and ask
them to measure as precisely and accurately as possible 50 mL of THF solvent
(density=887.6 g/L) and compute
the corresponding mass. They report the corresponding mass of solvent obtained.
Which candidate(s) will you
recommend to your manager based on their performance on this experiment? Select
all that apply.
Hint: The pipet has a precision of 0.05 mL
Instruments:
A) Candidate 1 used a graduated cylinder (Figure above). He reported the volume
V=50.0 mL. He computed a
mass of 0.44 g
B) Candidate 2 used a beaker (Figure above). He reported the volume V=50.0 mL.
He computed a mass of solvent
of 44.38 g
C) Candidate 3 used a volumetric pipet (figure above). He reported a volume V=50.
ml. He computed a mass of
solvent of 44 g.
D)
Candidate 4 used a volumetric pipet (figure above). He reported a volume V=50.00
ml. He computed a mass
of solvent of 44.38 g.

Since the gas in your graduated cylinder is a mixture of butane and water vapor, you must determine the partial pressure of the butane, pbutane, alone. to do this, consult a reference and record the partial pressure of the water vapor, pwater, at the temperature you recorded. use the following formula to compute the partial pressure of the butane. pbutane = atmosphere - pwater use the following combined gas law formula and compute the volume that the butane sample will occupy at stp. (hint: convert both temperatures to kelvin.) pbutane x voriginal = pstandard x vfinal troom tstandard use the following ratio and proportion formula to determine the mass of butane needed to occupy a volume of 22.4 l at stp. grams of butane you used “x” grams of butane ml of butane corrected to stp = 22,400 ml compute the theoretical molar mass of butane based on its formula and the atomic masses on the periodic table. compare your experimental results from #3 to the theoretical value of #4, computing a percent error of your findings using this formula: % error = measured value - accepted value x 100 accepted value use the following ratio and proportion formula to determine the mass of butane needed to occupy a volume of 22.4 l at stp. need asap

How many moles of sulfur dioxide are produced when 4.38 moles of oxygen completely react with iron (iv) sulfide

Amixture that has two or more substances that are spread out evenly is called a. compound b. heterogeneous c. substance d. homogeneous