VET VIRTUAL INTERNSHIPS – FINAL TEST CHEM

#1. Regarding the Feret diameter of a particle, which of the following statements do you believe to be correct?

If the particle is not circular in shape, the Feret diameter will have a different value depending on which direction you measure it. An average can be taken.

It can only be measured on a perfectly circular particle.

It is a measurement of the surface area of the particle.

#2. A particle has a Feret diameter of 100 μm, of what order of magnitude is its surface area?

80 μm2

800 μm2

8000 μm2

#3. How many grams of solute does one litre of a 1M solution of sodium chloride (common salt) in water have?

Approximately 30g

58.44g

116.88g

#4. How many grams of ethanol do we have to add to water to get one kilogram of a 5% by weight solution?

5g

50g

500g

#5. How is the mean value of a set of data of a variable calculated?

It is the sum of the values of all the data divided by the number of data.

Ordering the data values from smallest to largest it is the value that occupies the midpoint of the list.

It is the sum of the values of all the data excluding outliers divided by the total number of data.

#6. If I have the data series 2, 3, 5, 2, 5, 4, 3, 1. In which quartile is the value 4?

In Q2

In Q1

In Q3