Question

Dau test acum!Vă implor:((((

Answer 1

Calculeaza:

1. M.CH4 = 12+4 = 16 g/mol

nr.moli = m/M = 80/16 = 5 moli CH4

2. nr.moli = V/Vm ; Vm = 22,4 L/mol

= 4,48/22,4 = 0,2 moli SO2

3. 1 mol substanta contine 6,022x10la23 molecule

1 mol H2 ..................... 6,022x10la23 molecule H2

n moli .......................... 1,8069x10la26 molecule H2

= 300 moli H2

2. 1.

3.

PV1 = nRT1 => nR/P = V1/T1

PV2 = nRT2 => nR/P = V2/T2

=> V1/T1 = V2/T2

=> V2 = V1T2/T1 = 65x(327+273)/(273+27)

= 130 mL

4.

PV = nRT ; n = m/M ; M.O2 = 32 g/mol

=> PVM = mRT

=> P = mRT/VM

= 3,2x0,082x(273+0)/5x32 = 0,448 atm

5.

PV = nRT ; n = m/M ; M.Cl2 = 71 g/mol

=> PVM = mRT

=> m = PVM/RT

= 1x4,48x71/0,082x1 = 3879,02 g Cl2