Question

Hey
Am o prietena care are nevoie de ajutor la chimie.O poate ajuta cineva?

Answer 1

1.a) MCaCO3=40+12+16*3=100g/mol
b) MCaO=40+16=56g/mol
c) MCH4=12+4*1=16g/mol
d) MMgCl2=24+2*35.5=95g/mol
2. a) 18gH2O.........16gO
36gH2O.........x=32g O
b) 1mol H2SO4..........16*4=64g O
2mol...................x=128g O
c) 1kmol SO2............32kg O2
0.15kmol.............x=4.8 kg O=4800g O
3.a) 18gH2O.............2g H2
x=54g......................6g
b) 34gPH3.............3gH
x=68g.....................6gH
c) 62gH2CO3..........2g H2
x=186g..................6g