A spherical balloon is inflated so that its volume is increasing at the rate of 3.4 cubic feet per minute. How rapidly is the diameter of the balloon increasing when the diameter is 1.2 feet

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.

let that person have a turn to speak : )

може ли да зареждате повече информация, моля