Air in a certain submarine cabin becomes unsafe to breathe when the mass of CO2(g) exceeds 2156 grams. Determine the number of moles of CO2(g) at which the air becomes unsafe to breathe. The gram-formula mass of CO2 is 44.0 g/mol.

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 periodic table is arranged in order of atomic number."