A13.0 kg iron weightlifting plate has a volume of 1650 cm3 . what is the density of the iron plate in g/cm3?

Explanation:

It is known that density is the amount of mass divided by volume.

Mathematically,     Density =

It is given that mass is 13.0 kg or 13000 g (as 1 kg = 1000 g). And, volume is 1650 .

Therefore, calculate the density as follows.

                    Density =

                                 =    

                                 =

Thus, we can conclude that density of the given iron plate is .

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.

your answer is c) plasma

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