Kak tolong bantu jawab terima kasih.

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Kak tolong bantu jawab terima kasih.​

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Jawaban:

Terlampir di penjelasan

Penjelasan:

7. V CH4 ( STP ) = n x 22,4

112 = n x 22,4

n = 5 mol

9. Mr Na2SO4 = ( 2 x Ar Na ) + ( 1 x Ar S ) + ( 4 x Ar O )

= ( 2 x 23 ) + ( 1 x 32 ) + ( 4 x 16 )

=> 142

V = 500 ml ~ 0,5 L

M = n / V

0,2 = n / 0,5

n = 0,1 mol

massa Na2SO4 = n x Mr

= 0,1 x 142

=> 14,2 gram

10. M = n / V

V = 500 ml ~ 0,5 L

0,25 = n / 0,5

n = 0,125 mol


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