Asample of an unknown liquid has a volume of 30.0 ml and a mass of 6 g. what is its density? show your work or explain how you determined this value.

0.2 g/mL

Explanation:

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

Formula:

d=m/v

d= density

m=mass

V=volume

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.

Given data:

mass = 6 g

volume = 30.0 mL  

density = ?  

Now we will put the values in the formula,

d= m/v

d= 6 g/ 30 mL

d= 0.2 g /mL

so, the density of unknown liquid is 0.2 g/mL.

number of molecules / avogadro's number * molecule molecular = mass

explanation:

we define a gram-molecular weight as the mass of one mole of any element or compound. a mole contains avogadro's number of units (molecules) –  

6.022

x

10

23

. so, dividing the number of molecules by avogadro's number gives us the number of moles. multiplying that by the molecular weight gives us the mass. from the periodic table we find the gram-molecular weight of u to be238 and of f to be19. so,  

u

f

6

will have a gram-molecular weight of 352g.