I'm so confused, can someone help me? a) What is the volume of the Ball to the nearest mL?
ball= _mL

b) This is called the _method for determining volume.

c) If the mass of the ball is 120. g, calculate the density of the ball and fill in the correct units.
numerical value of the Density:

Units for density. Enter in lower case and as a single line of text.
Also, use standard abbreviations for units. _

A. 80 mL

B. Water displacement method

C. 1.5 g/mL

Explanation:

A. Determination of the volume of the ball.

Volume of water = 50 mL

Volume of water + ball = 130 mL

Volume of ball =?

Volume of ball = (Volume of water + ball) – (Volume of water)

Volume of ball = 130 – 50

Volume of ball = 80 mL

B. Determination of the name of the method used.

From the above, we can see that the volume of the ball was obtained by calculating the volume of water displaced by the ball.

Thus, the name of the method is WATER DISPLACEMENT METHOD for determining volume of substance.

C. Determination of the density of the ball.

Mass of ball = 120 g

Volume of ball = 80 mL

Density of ball =?

Density = mass / volume

Density of ball = 120 / 80

Density of ball = 1.5 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.