Question

in ce procent se gaseste hidrogenul in NH3 ,H2O, si CH4​
dau coroana

Answer 1

NH3

Masa moleculară:14+3=17

H%=3/17 •100=17,6

Ch4

Masa moleculară:12+4=16

H%=4/16•100=25

H2O

Masa moleculară:2+16=18

H%=2/18•100=11,11

Sper sa te ajute!!

Answer 2

Mnh3=MN+3Mh=14+3(3x1)=17gNh3
17gnh3... 3gH
100gnh3... x
100 x 3=17 x X
x= 300: 17
x=17, 64%H


mH20=2Mh+ M=2(2x1)+16=18gH20
18gH20... 2gH
100gH2O... x
X x 18= 100 x 2
x=200: 18
x=11, 11%H

MCH4=Mc+ 4MH=12+4(4x1)=16gCH4
16gCH4... 4gH
100gCH4... x
X x 16= 100 x 4
x=400: 16
x=25%

Sper că te-am ajutat!