Question

HELP ME! Vă rooog... Urgeeent

Answer 1

Poza 2.

1. p0V0/T0=p1V1/T1==>T este constant

p0V0=p1V1==>p1=p0V0/V1=2*30/25=>p1=2,4 atm

2. p0V0/T0=p1V1/T1==>2*10/27+273=1*V1/273==>V1=273*20/300=>V1=18,2L

3. 600cm3=0,6L
1 atm=760mmHg
624mmHg=0,821 atm
T=273+87=360K
m=1,3g

pV=m/M*RT==>M=mRT/pV=1,3*0,082*360/0,821*0,6=38,376/0,4926=>M=77,9g/mol=>78g/mol

5. Cp=md/ms*100==>md=Cp*ms/100=5*100/100=5g zahar

6. Cm=n/Vs==>n=Cm*Vs=1,4*5=7 moli NaNO3

MNaNO3=85g/mol

n=m/M==>m=n*M=7*85=595g NaNO3

7. Cm=n/Vs==>n=Cm*Vs=1*1,5=1,5 moli Ca(OH)2

1mol...........2mol
Ca(OH)2 + 2HCl ---> CaCl2 + 2H2O
1,5mol........x=3mol

MHCl=36.5g/mol

n=md/M==>md=n*M=3*36,5=109,5g HCl

Cp=md/ms*100==>ms=md*100/Cp=109,5*100/10=>ms=1095g sol.HCl

Poza 3. 

1.p0V0/T0=p1V1/T1==>T=constant

p0=p1*V1/V0=2*10/5=>p0=20/5=>p0=4 atm

2. 1atm=760mmHg
745mmHg=0,98 atm
153cm3=0,153L

p0V0/T0=p1V1/T1=0,98*0,153/273+27=1*V1/273==>V1=273*0,14994/300=>V1=0,13644L

3. 1cm3=0,001L

T=273+27=300K

pV=m/M*R*T==>m=pVM/RT=1,5*0,001*32/0,082*300=0,048/24,6=0.00195g O2

daca VO2 => 1m3=1000L

pV=m/M*R*T==>m=pVM/RT=1,5*1000*32/0,082*300=48000/24,6=1951,2195g=1,951kg O2

4.MCuSO4=160g/mol

n=m/M=8/160=0.05 moli CuSO4

Cm=n/Vs=0,05/0,4=0,125 moli/L CuSO4

5. Cp=md/ms*100==>md=15*300/100=45g zahar

6. Cm=n/Vs==>n=Cm*Vs=2*2=4 moli KOH

2mol........1mol
2KOH + H2SO4 ---> K2SO4 + 2H2O
4mol........x=2mol

MH2SO4=98g/mol

n=md/M==>md=2*98=196g H2SO4

Cp=md/ms*100==>ms=md*100/Cp=19600/20=980g sol. H2SO4


1'1.p0V0=p1V1==>V0=p1V1/p0=9*3/3=>V0=9L

2.2'. T=273+82=355K
1atm=760mmHg
680mmHg=0,894 atm

p0V0/T0=p1V1/T1==>0,894*150/355=1*V1/273==>V1=273*134,1/355=>V1=103,124L


3.3'. Maer=28.9g/mol
T=273+17=290K

pV=m/M*RT==>V=mRT/p=1000*0,082*290/1*28,9=>V=23780/28,9=822,83737g aer

4.4'.