Chemical & Physical Change – Chemistry Quiz

Twitter - Quiz Tutors
Chemical & Physical Change - Chemistry Quiz. Facebook - Quiz Tutors

Calculations, Chemical & Physical Change – Chemistry

The key terms of this Chemistry quiz include Chemical & Physical Change, Density, Mass, Volume.


A chemistry student needs 90.0 mL of dimethyl sulfoxide for an experiment. By consulting the CRC Handbook of Chemistry and Physics, the student discovers that the density of dimethyl sulfoxide is 1.10 g.cm-3. Calculate the mass of dimethyl sulfoxide the student should weigh out. Round your answer to3 significant digits.

99.0 g – correct


Take a look at this sketch, and then answer the questions below about the mass, volume and density of Objects D and C.

Answer

Chemical & Physical Change - Chemistry Quiz

Complete each row of the table below by filling in the missing exponent.

Answer


Decide whether each proposed addition or subtraction of measurements is possible. If it is possible, write the result in the last column of the table. Be sure every answer you enter has the correct unit symbol.

Answer

Chemical & Physical Change - Chemistry Quiz

Chemical & Physical Change – Chemistry Quiz


There are four sketches below. The first sketch shows a sample of Substance X. The three sketches underneath it show three different changes to the sample. You must decide whether each of these changes is possible. If a change is possible, you must also decide whether it is a physical change or a chemical change.

Each sketch is drawn as if the sample were under a microscope so powerful that individual atoms could be seen. Also, you should assume that you can see the entire sample, and that the sample is in a sealed box, so that no matter can enter or leave.

Answer


Classify the substance shown in the sketch below. You can click the other tabs in the sketch to get a magnified view. Be sure you check all the boxes on the right-hand side that are correct for this substance.

Note for advanced students: in some sketches the distance between particles has been exaggerated to make it easier to see each individual particle.

Answer

Chemical & Physical Change - Chemistry Quiz

An organic chemist measures the temperature T of a solution in a reaction flask. Here is the result.

T = 78. oC

Convert T to SI units. Round your answer to 0 decimal places.

Answer

351 K

Alternate Answer

T = 351. K


Complete each row of the table below by filling in the missing prefix.

Answer

Row Table. Chemical & Physical Change - Chemistry Quiz

Homepage