What are the standards units of length, mass, volume, temperature in the metric system?

Unit of mass, gram, Unit of volume, meter cube, and unite of temperature is Celsius.

1.      Why the metric (SI) system is called a decimal system of measurement?

It can be noted that the metric system is also known as decimal system. The main reason is that it is completely based on the multiple of ten. This shows that if any measurement is given in one metric unit then it can be converted easily in the metric unit. This can be done by moving the decimal place.

2.      What is the purpose of using prefixes in the metric system?

The main purpose of these prefixes in to provide differences between the larger and smaller units. This means that centimeter is used for smaller units and meter is used for larger units.

3.      Fill in the blank line below with the unit name, abbreviation and property measured

4.      Identify each of the following as a measured number or an exact number

Density and specific gravity

1.      What property of oil makes it float on water?

The property is its density. This is because oil is less dense than water so it can easily float on the water without any difficulty

2.      Why would heating the gas in a hot air balloon make the balloon rise?

The gas that is present in a hot air balloon is extremely less dense than the amount of air present around it. Moreover, when this gas become denser due to heat so balloon rises.

3.      What is the difference between density and specific gravity?

It can be noted that density is measuring the mass of a substance related to its volume. On the other hand, specific gravity is comparing the density of substance with density of water.

4.      An object has a mass of 18.4 and volume of 11.2 ml.

a.      What is the density of the object

c.       Will the object sink or float in water

The object will sink, because it is heavier than water.

5.      A 15 g sample of a liquid has a density of 0.875 g/ml.

a.      What is the volume in millimeter of a liquid? Use conversion factors to calculate answer.

b.      What mass in grams, of the liquid is in 34.6 ml of the liquid

It can be noted that 1g =1 milliliter

So it will be 34.6 gram

Experimental Section,

Procedure: Take Meterstick and string as material

Now in the next step, just observed the mark lines mentioned on the meterstick. After this identify the smallest line present on it

Now use meterstick for the length measurement present on the report sheet. For that case, string is used that will determine the distance around the wrist. Now just estimate the digit value in the measurement box.

In every measurement just indicate the estimated digit

Also include the number of significant figures in every measurement

Now just measure the length of the line and note it on the report sheet. This report sheet must contains the estimated value. In the end just compare these values

Section 3: A density of liquid

Subsection 3.A.1: Density if water: For measuring the density of water, just take the electronic balance

·         Now, just determine the mass of the Amity

·         Now just calibrate the graduated cylinder at different marks.

·         Now check the zero point of the balance

·         Now put the cylinder on the electronic balance and not the value on the paper. Now again do the same procedure.

·         Now use the water dropper to add more water in the cylinder.

·         Use the dropper so balance the water in the cylinder

·         For measuring the water in the cylinder, the eye contact must be equal to the cylinder

·         Again note the value after putting it on the electronic balance.

·         Just measuring the mass of water after adding each milliliter of water in it.

Part 1 B

·         Use the calibrated graduated cylinder to determine the density of the unknown liquid

·         Now again repeat the same procedure as above for the unknown liquid.

·         For that case, just need to add unknown liquid in it and measure the mass and note it on the paper.

·         This this mass is compared with the water mass. The difference between the unknown liquid and water will give information about this liquid.

Section 3. A.2

Determine the density of an unknown liquid

·         For that case, take the volumetric flask of 25 milliliter. Now just measure it on the electronic balance. Note the mass of the empty volumetric flask.

·         Now add 30 bits in the flask and measure the mass of this flask again and note the value

·         Again add some unknown liquid in the flask and just measure the mass of the flask again.

Section 3. B Specific Gravity

·         For that case, just calculate the specific gravity of water. It can be done by dividing gravity of water by density from A.1. The density of water is given by 1g/ml.

·         Now just calculate the specific gravity of the liquid sample. For that case, there is need to use A.2. This can be done by dividing the density of unknown liquid sample by density of water 1g/ml.

Section 3.C density of solids

·         In the first step, take a triple beam balance 

·         Measure the mass of the solid object. This mass will be in grams

·         Now just balance the object on the pan

·         Now just move the pointer from one place to another slowly.

·         Just try to balance the object with the main point of the balance

·         Check the pointers of the instrument when the solid object is absolutely balanced

·         Just not the reading on the paper and apply the formula to measure the density of the solid

Section 3. D: Graphing Mass and Volume

Post lab Section

Results:

Density and specific gravity

A.    Density of liquid

A.    Density of water

A.2 Density of an Unknown liquid

B.     Specific gravity

How do the calculated specific gravity of water and the liquid sample (1,2) compare to the hydrometer reading (3,4) for water and the liquid sample?

It can be noted that the specific gravity of water and liquid sample is less than the specific gravity of water and liquid. It is measured from the help of hydrometer.

C.     Density of solids

Type of metal= Aluminum

D.    Graphing mass and volume

Discussion/ conclusion:

In this lab, there is complete information about measurement, the length, density and specific gravity. In this I have learn how to use different kind of measurement instrument in lab and also their advantages. How to take readings from them and perform calculation. Moreover, I have also learn how to perform different kind of measurements and calculate density of water and unknown liquid.

1)      Application/ practical uses of the experiment or the techniques performed.

The main application is that it will help me in the industry where measurement is playing a key role. Moreover, measurement is also helpful in making medicines.

2)      The specific advantages you have drawn from the experiment.

The main advantage is that I have learned how to measure different kind of objects perfectly. Moreover, how to take readings from the measuring instruments.

Postlab Question and Answers

A.    Measuring length

1.      What units are represented by the numbers marked on the materstick

The units are represented by length.

2.      What do the small line marked on the meterstick represent

They are representing the statements given on the paper.

3.      Complete the following statements

There are 100 centimeters in 1 meter

There are 1000 millimeters in 1 meter

There are 10 millimeters in 1 cm

Question 1

A metal object of mass 8.37 g. when it was placed in a graduated cylinder…

To find

Density of metal

The density will be 8.9 and it is copper

Question 2

What is the mass of a solution that has a density of 0.775 g/ml and a volume of 50 ml.

Question 3

What is the volume of a solution that has a specific gravity of 1.2 and mass of 1.85