Answer:
Q 3 = D=m/v
D= density
m=mass
V=volume
Q 5 = d = 2.7 g/cm³
Q 6 = d = 3.41 g/mL
Explanation:
Q 3 = The 1st q is missing. So we cant gives formula by using properties describe in q 1.
General formula:
D=m/v
D= density
m=mass
V=volume
Density:
Density is equal to the mass of substance divided by its volume.
Units:
SI unit of density is Kg/m3.
Other units are given below,
g/cm3, g/mL , kg/L
Symbol:
The symbol used for density is called rho. It is represented by ρ. However letter D can also be used to represent the density.
Q 4 = What two sets of units can be used to describe the density? why are they interchangeable?
Answer:
The density of material can be describe in different scale but its value remain the same. Its a unique property of material. The density is describe in mass and volume units. They are interchangeable because:
It is expressed either in SI unit or CGS units it will remain same. e.g in SI it is expressed in Kg/L. In CGS it is expressed in g/mL.
In this case the difference is that we will multiply the gram with thousand to convert into Kg and milliliter with thousand to convert it into litter. Thus the CGS unit will convert into SI units.
Q 5 = A solid block with a length of 6.0 cm a width of 3.0 cm and height of 3.0 cm has a mass of 146 g. What is the block's density?
Given data:
Height = 3.0 cm
Width = 3.0 cm
Length = 6.0 cm
Wight of block 146 g
density = ?
Solution:
Formula:
D=m/v
D= density
m=mass
V=volume
First of all we will determine the volume from given height, width and length.
Volume = height × width × length
V = h × w × l
V = 3.0 cm × 3.0 cm × 6.0 cm
V = 54 cm³
Now we will put the values in formula:
d = m/v
d = 146 g/ 54 cm³
d = 2.7 g/cm³
Q 6 = To determine the density of an irregularly shaped object, a student immersed the object in 21.2 mL of water in graduated cylinder causing the level of the water to rise to 27.8 mL. If the object has a mass of 22.4 g what is the density of object?
Given data:
Volume of water = 21.2 mL
Volume of water + object = 27.8 mL
Mass of object = 22.4 g
Density of object = ?
Solution:
First of all we will calculate the volume of object:
Volume of object = (Volume of water + object ) - Volume of water
V = 27.8 - 21.2
V = 6.6 mL
Now we will determine the density:
d = m/v
d = 22.5 g/ 6.6 mL
d = 3.41 g/mL
