Which substances are most likely acids? Check all that apply.
O CHA
OHI
NH3
HNO3
O
NaCl

HNO3 is nitric acid. NH3 is ammonia, NaCl is common salt. O is an atom of oxygen. No idea about remaining.

your picture is not part of the scientific method.

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.