Chem Lab Cumulative Quiz Latest
Version Graded A+
When mixing substances, what should you add first: acid or water?
Add water to the acid.
Add acid to the water.
Mix acid and water together simultaneously.
Add water and acid in equal amounts.
✔✔Add acid to the water.
How is density calculated?
By dividing mass by volume.
By multiplying mass and volume.
By adding mass and volume.
By subtracting volume from mass.
1
,✔✔By dividing mass by volume.
What does precision refer to in measurements?
The closeness of your measurements to the true value (impacted by systematic errors).
The degree to which your measurements agree with each other (impacted by random errors).
The accuracy of your measurements over a long period.
The exactness of your measurements compared to a standard.
✔✔The degree to which your measurements agree with each other (impacted by random errors).
How is accuracy defined?
The degree to which your measurements are consistent with each other.
The proximity of your measurements to the correct value (influenced by systematic errors).
2
, The reliability of your measurement instruments.
The ability of your measurements to be replicated under different conditions.
✔✔The proximity of your measurements to the correct value (influenced by systematic errors).
What are the properties of acetone?
It has a high boiling point and evaporates slowly; it is nonflammable and safe to pour down the
sink.
It has a moderate boiling point and evaporates at a normal rate; it is slightly flammable and can
be poured down the sink.
It has a very low boiling point, evaporates quickly, is flammable, and should not be discarded
down the sink.
It has a high boiling point and evaporates very slowly; it is nonflammable and can be disposed
of down the sink.
✔✔It has a very low boiling point, evaporates quickly, is flammable, and should not be
discarded down the sink.
3
Version Graded A+
When mixing substances, what should you add first: acid or water?
Add water to the acid.
Add acid to the water.
Mix acid and water together simultaneously.
Add water and acid in equal amounts.
✔✔Add acid to the water.
How is density calculated?
By dividing mass by volume.
By multiplying mass and volume.
By adding mass and volume.
By subtracting volume from mass.
1
,✔✔By dividing mass by volume.
What does precision refer to in measurements?
The closeness of your measurements to the true value (impacted by systematic errors).
The degree to which your measurements agree with each other (impacted by random errors).
The accuracy of your measurements over a long period.
The exactness of your measurements compared to a standard.
✔✔The degree to which your measurements agree with each other (impacted by random errors).
How is accuracy defined?
The degree to which your measurements are consistent with each other.
The proximity of your measurements to the correct value (influenced by systematic errors).
2
, The reliability of your measurement instruments.
The ability of your measurements to be replicated under different conditions.
✔✔The proximity of your measurements to the correct value (influenced by systematic errors).
What are the properties of acetone?
It has a high boiling point and evaporates slowly; it is nonflammable and safe to pour down the
sink.
It has a moderate boiling point and evaporates at a normal rate; it is slightly flammable and can
be poured down the sink.
It has a very low boiling point, evaporates quickly, is flammable, and should not be discarded
down the sink.
It has a high boiling point and evaporates very slowly; it is nonflammable and can be disposed
of down the sink.
✔✔It has a very low boiling point, evaporates quickly, is flammable, and should not be
discarded down the sink.
3
