Question

1.Cate grame reprezinta:

a) 5mol de atomi fer.

2. Cati moli reprezinta:

a)0.8 kg carbonat de calciu

b) 126kg acid azotic

c)1960g acid sulfuric

d) 500 kmoli sulfat de cupru.


AJUTATIMA VA ROG..... REPEDE!! dAU COROANA !!

Answer 1

5 moli Fe-----5.56=280 g Fe                           AFe=56

CaCO3
M=40+12+3.16=100
100gCaCO3----------1mol CaCO3
800 g-----------------------x
x800:100=8 moli CaCO3

HNO3
M=1+14+3.16=63
63gHNO3-------1mol
126000 g--------y
y=126000:63=2000moli HNO3

H2SO4
M=2+32+4.16=98
98gH2SO4-------1mol
1960000g---------z
z=1960000:98=20000 moli H2S04

CuSO4
500Kmoli=500000 moli CuSO4