Your company is hiring a new lab technician. You are interviewing 4 candidates and
ask
them...
Chemistry, 04.09.2021 05:30 dianaosorio33895
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.
Answers: 3
Chemistry, 22.06.2019 09:10
Select the correct answer from each drop-down menu.describe what happens to a carbon-11 atom when it undergoes positron emission.the decay of a carbon-11 atom _1_, and this causes it to emit _2_.options for 1: > changes a neutron into a proton> changes a proton into a neutron> is hit with a neutron> reconfigures its protons and neutronsoptions for 2: > a negatively charged electron-sized particle> a positively charged election-sized particle> two atoms and several neutrons> two neutrons and two protons
Answers: 3
Chemistry, 22.06.2019 10:00
Which sentence about particles in matter is true? a. atoms are present in solids and liquids but not in gases. b. the particles of matter are in constant motion. c. the same kinds of atoms are found in different elements. d. when a solid changes to a liquid, the sizes of the particles change.
Answers: 1
Biology, 21.11.2020 01:00
Mathematics, 21.11.2020 01:00
Chemistry, 21.11.2020 01:00
Spanish, 21.11.2020 01:00
Mathematics, 21.11.2020 01:00
Mathematics, 21.11.2020 01:00
Mathematics, 21.11.2020 01:00
History, 21.11.2020 01:00