a: =22+25,5=47,5

b: \(=-9.207-1.503+3,8-28=-10,71-28+3,8\)

=-34,91

c: =-12,5-3,5+17,55+2,45

=20-16=4

d: =2,07+1,03-7,36-7,64+8,97=3,1-15+8,97=-2,93

e: =2,07+4,23+3,005-12,005

=6,3-9=-2,7

f: \(=4,35-2,67+1,65+3,54-6,33=6-9+3,54=3,54-3=0,54\)

a: =22+25,5=47,5

b: =-9,207-1,505+3,8-2,8=1-10,712=-9,712

c: \(=2,07+3,005-12,005+4,23=6,3-9=-2,7\)

e: =3,58(24,45+75,55)=3,58*100=358

5,075 - 7,775 = -2.7

(2,07+3,005)-(12,005-4,23)

=>2,07+3,005-12,005+4,23

=>(2,07+4,23)-(12,005+3,005)

=>6,3-15,01=-8,71

-2.93

=2,07-7,005-12,005+4,23

=6,3-19,01

=-12,71

\(\left(2,07-7,005\right)-\left(12,005-4,23\right)\\ =-4,935-7,775\\ =-4,935+\left(-7,775\right)\\ =-12,71\)

60,7+25,5-38,7

= 47,5

(-9,207)+3,8+(-1,5030)-2,8

= -9,71

60,7+25,5-38,7=47,5

(-9,207)+3,8+(-1,5030)-2,8=-9,71

 = 47,5

 = -9,71

=4,35-1,02+-2,79

=3,33-2,79

=0,54

4,35-(2,67-1,65)+(3,54-6,33)

= 4,35-2,67+1,65+3,54-6,33

=(4,35+1,65)-(2,67+6,33)+3,54

=6-9+3,54

=0,54

2,07- 7,36+8.97 +1.03-7,64 = -2.93

`2,07 - 7,36 - (-8,97) + 1.03 - 7,64`

`= 2,07 - 7,36 + 776 + 3 - 7,64`

`= 776,07`

a)

$M_{khí} = M_{N_2}.2 = 28.2 = 56(g/mol)$
b)

$M_{khí\ 1} = M_{không\ khí}.2,45 = 29.2,45 = 71,05(g/mol)$
$M_{khí\ 2} = M_{không\ khí}.0,965 = 29.0,965 = 27,985(g/mol)$