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Sebanyak 500 mL larutan yang mengandung 17,1 gram ...

Sebanyak 500 mL larutan yang mengandung 17,1 gram zat nonelektrolit pada suhu 27 degree C mempunyai tekanan osmotik 2,46 atm. Jika R equals 0 comma 082 space L space atm space mol to the power of negative sign 1 end exponent K to the power of negative sign 1 end exponent, maka M subscript r zat nonelektrolit tersebut adalah ...space 

  1. 90space 

  2. 150space 

  3. 207space 

  4. 278space 

  5. 342space 

Jawaban:

table attributes columnalign right center left columnspacing 0px end attributes row pi equals cell M cross times R cross times T end cell row pi equals cell g over M subscript r cross times 1000 over V cross times R cross times T end cell row cell 2 comma 46 space atm end cell equals cell fraction numerator 17 comma 1 space gram over denominator M subscript r end fraction cross times fraction numerator 1000 over denominator 500 space mL end fraction cross times 0 comma 082 space L space atm space mol to the power of negative sign 1 end exponent K to the power of negative sign 1 end exponent cross times left parenthesis 27 degree C and 273 K right parenthesis end cell row cell 2 comma 46 space atm end cell equals cell fraction numerator 17 comma 1 space gram over denominator M subscript r end fraction cross times fraction numerator 1000 over denominator 500 space mL end fraction cross times 0 comma 082 space L space atm space mol to the power of negative sign 1 end exponent K to the power of negative sign 1 end exponent cross times 300 K end cell row cell M subscript r end cell equals cell fraction numerator 17 comma 1 space gram cross times 1000 cross times 0 comma 082 space L space atm space mol to the power of negative sign 1 end exponent K to the power of negative sign 1 end exponent cross times 300 K over denominator 2 comma 46 space atm cross times 500 space mL end fraction end cell row cell M subscript r end cell equals cell 342 space gram space mol to the power of negative sign 1 end exponent end cell end table 

Jadi italic M subscript italic r dari zat nonelektrolit tersebut adalah bold 342 bold space bold gram bold space bold mol to the power of bold minus sign bold 1 end exponent.

Oleh karena itu, jawaban yang benar adalah E.space 

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