Neoidn
Answered

IDNStudy.com, kung saan nagtatagpo ang mga tanong at sagot. Magtanong ng anumang bagay at makatanggap ng mga maalam na sagot mula sa aming komunidad ng mga propesyonal.

A salt has a mass of 20 grams placed in 250 grams of water. What is the percentage by mass? Please Give The Formula And The Solution Thanks:)

Sagot :

Bellalesseidn
I'm going to solve it using the GRESA form.

G : m solute = 20 grams; solvent = 250 grams

R : percent by mass

E : % bm = [tex] \frac{m solute}{m solution} [/tex] x 100; solution = solute + solvent

S : % bm = [tex] \frac{m solute}{m solution} [/tex] x 100
               = [tex] \frac{20}{250} x 100[/tex]
               = 0.08 x 100
               = 8

A : 8%
Jeremiaidn
Asked:  What is the percentage by mass? 

Percentage by Mass of Solute (salt) 

       =                       [tex] \frac{mass of solute}{mass of solution} [/tex]
          
       =                        [tex] \frac{20g}{20g + 250g} [/tex]
       =                        [tex] \frac{20g}{270g} [/tex]
      =                         7.40% (rounded off to the nearest hundredths)

Percentage by Mass of Solvent (water)

     =                           [tex] \frac{mass of solvent}{mass of solution} [/tex]
     =                           [tex] \frac{250g}{250g + 20g} [/tex]
     =                           [tex] \frac{250g}{270g} [/tex]
     =                           92. 60% (rounded off to the nearest hundredths)
Maraming salamat sa iyong kontribusyon. Huwag kalimutang bumalik at magtanong ng mga bagong bagay. Ang iyong kaalaman ay napakahalaga sa ating komunidad. Para sa mabilis at eksaktong mga solusyon, isipin ang IDNStudy.com. Salamat sa iyong pagbisita at sa muling pagkikita.