As a child you would wait
And watch from far away
But you always knew that you'd be the one
That work while they all play
In youth you'd lay
Awake at night and scheme
Of all the things that you would change
But it was just a dream!
Here we are, don't turn away now,
We are the warriors that built this town
Here we are, don't turn away now
We are the warriors that built this town
From dust.
Will come
When you'll have to rise
Above the best and prove yourself
Your spirit never dies!
Farewell, I've gone to take my throne above
But don't weep for me
'Cause this will be
The labor of my love
Here we are, don't turn away now
We are the warriors that built this town
Here we are, don't turn away now,
We are the warriors that built this town
From dust.
Here we are, don't turn away now
We are the warriors that built this town
Here we are, don't turn away now
We are the warriors that built this town
From dust
n(NaCl)=n(NaOH)=0,5 моль.
ответ:0,5 моль.
б)Na2O+2HCl=2NaCl+H2O
n(NaCl)=n(Na2O)*2=0,5*2=1 моль
ответ:1 моль.
2.C+O2=CO2
n(CO2)=m/M=22/44=0,5 моль
n(C)=n(CO2)=0,5 моль
m(C)=n*M=0,5*12=6 г.
ответ:6 г
3.H2SO4+BaCl2=BaSO4+2HCl
n(BaSO4)=m/M=4,66/233=0,02 моль
n(H2SO4)=n(BaCl2)=n(BaSO4)=0,02 моль
m(H2SO4)=n*M=0,02*98=1,96 г
m(BaCl2)=n*M=0,02*208=4,16 г
ответ:1,96(г);4,16(г)
4.CaO+H2O=Ca(OH)2
n(Ca(OH)2)=m/M=18,5/74=0,25 моль
n(CaO)=n(Ca(OH)2)=0,25 моль
m(CaO)=n*M=0,25*56=14 г
ответ:14 г.
5.H2SO4+Na2CO3=Na2SO4+H2O+CO2.
n(H2SO4)=m/M=4,9/98=0,05 моль
n(Na2CO3)=n(H2SO4)=0,05 моль
m(Na2CO3)=n*M=0,05*106=5,3 г.
ответ:5,3 г.