Chemistry 1151
A 2.67 g piece of zinc (density = 7.14 g/mL) is added to a graduated cylinder that
contains 12.13 mL
H2O. What will be the final volume reading on the graduated cylinder? - ANS -
12.5
\A 24.5 g sample of solution has a density of 0.768 g/mL. What is the sample
volume (in mL)? - ANS - 31.9
\A block has a mass of 4.710 g and a volume of 132.1 cm3. Calculate the density
in g/cm3. - ANS - .03565
\A football field is 120 yards by 53.333 yards. What is the area of the football field
in acres if 1 acre=43560 ft2? Use correct significant figures when answering this
question. - ANS - 1.3
\A graduated cylinder contains 10.00 mL water. A 14.74 g piece of aluminum is
added to the water, and the volume rises to 15.46 mL. What is the density of the
aluminum? - ANS - 2.7
\A student removes a chemical sample from a reagent bottle to be used in an
experiment. What should he do with any excess chemical remaining from this
sample after the experiment is complete? - ANS - Check and see if anyone else
can use the chemical. If not, discard in the proper waste container.
\After clamping a buret to a ring stand, you notice that the set-up is tippy and
unstable. What should you do to stabilize the set-up? - ANS - Move the buret
clamp to a ring stand with a larger base.
\Calculate the volume of a box which is 125 cm long, 37 cm wide, and 68 cm high.
Report your answer with correct significant figures in cubic centimeters. - ANS -
125x37x68
310000
\Changing gloves often will minimize the spread of chemicals. To properly
remove gloves, first,__________, and then,_______. Then insert_______ between
the interior edge of the second glove and the skin, and remove the second glove.
- ANS - grasp the exterior of one glove with a gloved hand
peel off the first glove
a bare finger
\Check that there are no cracks in the glassware - ANS - Heating a crucible to
remove water from a hydrate
, \Choose the best graduated cylinder to make each measurement in a single use.
36 mL of water
5.75 mL of a sucrose solution
18.5 mL of a NaClsolution - ANS - A 50 mL graduated cylinder with markings
every 10 mL
A 10 mL graduated cylinder with markings every 0.1 mL
A 25 mL graduated cylinder with markings every 1 mL
\Convert 7860 feet to miles
7860 feet×( A )/( B ) - ANS - 1mile/5280 feet
7860 feet=1.49 miles
\Determine the best way to deal with each of the following items that may dangle
into the way during lab work.
flowy sleeves
loose bracelets
long earrings
long hair
necklaces - ANS - Tie back or secure
Remove
Remove
Tie back or secure
Remove
\Determine the safest option in the lab if you need your vision to be corrected. -
ANS - Wear corrective glasses or lenses under your safety goggles for the whole
experiment, but always check with your TA or Instructor for your school's policy
\Determine when to put on disposable gloves for work in the lab. - ANS - Before
handling any glassware or chemicals for the experiment
A 2.67 g piece of zinc (density = 7.14 g/mL) is added to a graduated cylinder that
contains 12.13 mL
H2O. What will be the final volume reading on the graduated cylinder? - ANS -
12.5
\A 24.5 g sample of solution has a density of 0.768 g/mL. What is the sample
volume (in mL)? - ANS - 31.9
\A block has a mass of 4.710 g and a volume of 132.1 cm3. Calculate the density
in g/cm3. - ANS - .03565
\A football field is 120 yards by 53.333 yards. What is the area of the football field
in acres if 1 acre=43560 ft2? Use correct significant figures when answering this
question. - ANS - 1.3
\A graduated cylinder contains 10.00 mL water. A 14.74 g piece of aluminum is
added to the water, and the volume rises to 15.46 mL. What is the density of the
aluminum? - ANS - 2.7
\A student removes a chemical sample from a reagent bottle to be used in an
experiment. What should he do with any excess chemical remaining from this
sample after the experiment is complete? - ANS - Check and see if anyone else
can use the chemical. If not, discard in the proper waste container.
\After clamping a buret to a ring stand, you notice that the set-up is tippy and
unstable. What should you do to stabilize the set-up? - ANS - Move the buret
clamp to a ring stand with a larger base.
\Calculate the volume of a box which is 125 cm long, 37 cm wide, and 68 cm high.
Report your answer with correct significant figures in cubic centimeters. - ANS -
125x37x68
310000
\Changing gloves often will minimize the spread of chemicals. To properly
remove gloves, first,__________, and then,_______. Then insert_______ between
the interior edge of the second glove and the skin, and remove the second glove.
- ANS - grasp the exterior of one glove with a gloved hand
peel off the first glove
a bare finger
\Check that there are no cracks in the glassware - ANS - Heating a crucible to
remove water from a hydrate
, \Choose the best graduated cylinder to make each measurement in a single use.
36 mL of water
5.75 mL of a sucrose solution
18.5 mL of a NaClsolution - ANS - A 50 mL graduated cylinder with markings
every 10 mL
A 10 mL graduated cylinder with markings every 0.1 mL
A 25 mL graduated cylinder with markings every 1 mL
\Convert 7860 feet to miles
7860 feet×( A )/( B ) - ANS - 1mile/5280 feet
7860 feet=1.49 miles
\Determine the best way to deal with each of the following items that may dangle
into the way during lab work.
flowy sleeves
loose bracelets
long earrings
long hair
necklaces - ANS - Tie back or secure
Remove
Remove
Tie back or secure
Remove
\Determine the safest option in the lab if you need your vision to be corrected. -
ANS - Wear corrective glasses or lenses under your safety goggles for the whole
experiment, but always check with your TA or Instructor for your school's policy
\Determine when to put on disposable gloves for work in the lab. - ANS - Before
handling any glassware or chemicals for the experiment
