The diagram below shows the collection of h2 gas over water at 25°c. the total pressure in the tube is 760.0 torr. what is the pressure exerted by the hydrogen gas alone? (hint: water vapor pressure = 23.8 torr @ 25°c)

736.2 torr

Explanation: According to Dalton's law, the total pressure of a mixture of gases is the sum of individual pressures exerted by the constituent gases.

Thus

Given:

Thus

Thus pressure exerted by the hydrogen gas alone is 736.2 torr.

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.

i believe it is-

d.) gravity pulled particles of dust and gas together to form planets.