A) naclo3 -> nacl + b) hno3 +fe -> h2 + fe (no3) sustitucion c) kl + pb (no3)2 -> pbl2 + sustitucion d) c + o2 -> o sintesis e) ca(hco3)2 -> caco3 + co2 + h2o--no estoy seguro pero en todo caso descomposicion

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 answer is 1260

you spend 7 hours in school for 1 school day with 5 school days in 1 school week with 36 school weeks in a school year.

7*5*36= 1260 it's all about multiplying