A rectangular box has a length of 12 cm, a width of 20 cm, and a height of 5 cm. What is the volume of the box in ml?
a 1200 mL
b 160 mL
C 300 mL
d 37 mL

a. 1,200 mL

Explanation:

20 x 12 x 5 = 1,200

(L x W x H)

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.

the answer is na (sodium)