Which of the following correctly describes the process of inspiration (air entering the lungs).

The lungs expand, causing their internal pressure to decrease

The lungs expand, causing their internal pressure to increase

The lungs contract, causing their internal pressure to increase

The lungs contract, causing their internal pressure to decrease

icc, international association for cereal chemistry

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.

because of all the things that happen around the us, many people get into arguments which sadly could get physical, but we should actually make a change for that.