Do dor
Which statement is true if 12.7g Cu and 62.9g AgNO3 react as shown below? Cu +
2AgNO3 --> Cu(NO3)2 + 2Ag
State
Weight
Energy
LR is Cu and there
is an excess of 5.1g
AgNO3
LR is Cu and there
is an excess of
0.030g AgNO3
LR is AgNO3 and
there is an excess
of 1.9g Cu
LR is AgNO3 and
there is an excess
of 0.030g CU
Electro
Melting
Bolig
Electre
lantzat
Radius
Hard
Modu

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.