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a.\(M_A=23.2=46\) ( g/mol )
b.\(M_B=2,7.16=43,2\) ( g/mol )
c.\(M_C=2.29=58\) ( g/mol )
d.\(M_D=2.17=34\) ( g/mol )
e.\(M_E=1,32.44=58,08\) ( g/mol )
f.\(M_F=2,71.34=92,14\) ( g/mol )
g.\(M_G=1,5.32=48\) ( g/mol )
h.\(M_H=0,41.71=29,11\) ( g/mol )
1)
$M_X = 1,375.32 = 44(g/mol)$
$M_X = 0,0625.32 = 2(g/mol)$
2)
$M_X = 2,207.29 = 64(g/mol)$
$M_X = 1,172.29 = 34(g/mol)$
3)
$M_X = 17.2 = 34(g/mol)$
Vậy khí X là $H_2S$
4)
a) $M_X = 0,552.29 = 16$
Gọi CTHH của X là $C_xH_y$
Ta có : $\dfrac{12x}{75} = \dfrac{y}{25} = \dfrac{16}{100}$
Suy ra: x = 1 ; y = 4
Vậy X là $CH_4$
$CH_4 + 2O_2 \xrightarrow{t^o} CO_ 2+ 2H_2O$
$V_{O_2} = 2V_{CH_4} = 11,2.2 = 22,4(lít)$
a)
\(\dfrac{M_X}{M_{H_2}}=18\\ \Rightarrow M_X=18.2=32\left(\dfrac{g}{mol}\right)\)
`X:O_2`
b)
\(\dfrac{M_Y}{M_{H_2}}=15\\ \Rightarrow M_Y=15.2=30\left(\dfrac{g}{mol}\right)\)
`Y:NO`
c)
\(\dfrac{M_Z}{M_{H_2}}=32\\ \Rightarrow M_Z=32.2=64\left(\dfrac{g}{mol}\right)\)
`Z:SO_2`
d)
\(\dfrac{M_T}{M_{kk}}=1,517\\ \Rightarrow M_T=1,517.29=44\left(\dfrac{g}{mol}\right)\)
`T:CO_2`
e)
\(\dfrac{M_U}{M_{kk}}=2,759\\ \Rightarrow M_U=2,759.29=80\left(\dfrac{g}{mol}\right)\)
`U:SO_3`
Ta có :
\(\dfrac{M_X}{M_Y}=1,25\Rightarrow M_X=1,25M_Y\\ \dfrac{M_X}{M_Z}=5\Rightarrow M_X=5M_Z\)
Suy ra :
$1,25M_Y = 5M_Z \Rightarrow \dfrac{M_Y}{M_Z} = \dfrac{5}{1,25} = 4$