Pertanyaan

Diketahui: A r : C = 12 g mol − 1 , N = 14 g mol − 1 , O = 16 g mol − 1 , S = 32 g mol − 1 , H = 1 g mol − 1 , Fe = 56 g mol − 1 Tentukan massa dari 5 mol CO ( NH 2 ) 2 !

Diketahui: $A_{r} : C = 12 g mol^{- 1}, N = 14 g mol^{- 1}, O = 16 g mol^{- 1}, S = 32 g mol^{- 1}, H = 1 g mol^{- 1}, Fe = 56 g mol^{- 1}$

Tentukan massa dari 5 mol $CO (NH_{2})_{2}$ ! $\;$

I. Solichah

Master Teacher

Jawaban terverifikasi

Pembahasan

Cara mencari massa jika diketahui data Ar unsur penyusun senyawanya adalah dengan menggunakan rumus: Jadi massa adalah 300 gram.

Cara mencari massa jika diketahui data Ar unsur penyusun senyawanya adalah dengan menggunakan rumus:

mol equals begin inline style m over Mr end style

$table attributes columnalign right center left columnspacing 0px end attributes row cell mol space C O open parentheses N H subscript 2 close parentheses subscript 2 end cell equals cell fraction numerator g space C O open parentheses N H subscript 2 close parentheses subscript 2 over denominator M subscript r space C O open parentheses N H subscript 2 close parentheses subscript 2 end fraction end cell row cell space italic g space C O open parentheses N H subscript 2 close parentheses subscript 2 end cell equals cell mol space C O open parentheses N H subscript 2 close parentheses subscript 2 cross times M subscript r space C O open parentheses N H subscript 2 close parentheses subscript 2 end cell row cell italic g space C O open parentheses N H subscript 2 close parentheses subscript 2 end cell equals cell mol space C O open parentheses N H subscript 2 close parentheses subscript 2 cross times left curly bracket left parenthesis 1 cross times A subscript r space C right parenthesis plus left parenthesis 1 cross times A subscript r space O right parenthesis end cell row blank blank cell plus left parenthesis 2 cross times A subscript r space N right parenthesis plus left parenthesis 4 cross times A subscript r space H right parenthesis right curly bracket end cell row cell italic g space C O open parentheses N H subscript 2 close parentheses subscript 2 end cell equals cell 5 space mol cross times left curly bracket left parenthesis 1 cross times 12 space g space mol to the power of negative sign 1 end exponent right parenthesis plus left parenthesis 1 cross times 16 g space mol to the power of negative sign 1 end exponent right parenthesis end cell row blank blank cell plus left parenthesis 2 cross times 14 space g space mol to the power of negative sign 1 end exponent right parenthesis plus left parenthesis 4 cross times 1 g space mol to the power of negative sign 1 end exponent right parenthesis right curly bracket end cell row cell italic g space C O open parentheses N H subscript 2 close parentheses subscript 2 end cell equals cell 5 space mol cross times 60 space g space mol to the power of negative sign 1 end exponent end cell row cell italic g space C O open parentheses N H subscript 2 close parentheses subscript 2 end cell equals cell 300 space g end cell end table$

Jadi massa C O bold open parentheses N H subscript bold 2 bold close parentheses subscript bold 2 adalah 300 gram.