Answered

IDNStudy.com, kung saan ang mga eksperto at komunidad ay nagtutulungan para sagutin ang iyong mga tanong. Ang aming mga eksperto ay handang magbigay ng malalim na sagot at praktikal na solusyon sa lahat ng iyong mga tanong.

A solution for disinfecting clinical thermometers was prepared by dissolving 22.5 g of ethyl alcohol in 58.0
g of water. What is the percentage by mass of ethyl alcohol in the solution?
a. 0.2795 % b. 0.280 %
c. 0.28 %
d. 0.3%

Sagot :

Indrawboyidn

The percentage by mass of ethyl alcohol in the solution : 27.95%

Further explanation  

The concentration of a substance can be expressed in several quantities such as moles, percent (%) weight / volume,), molarity, molality, parts per million (ppm) or mole fraction. The concentration shows the amount of solute in a unit of the amount of solvent.  

So the concentration of a solution can be expressed as a percent which is the ratio of solute to solution. Can be expressed in percent of mass (m / m) or volume percent (v / v)  

[tex]\tt \%mass=\dfrac{mass~solute}{mass~solution}\times 100\%[/tex]

Solution = Solute + Solvent  

The solute is the substance that is dissolved usually in smaller amounts when compared to solvents  

Given

22.5 g of ethyl alcohol

58.0  g of water

Required

the percentage by mass

Solution

mass solute = 22.5 g

mass solvent = 58 g

mass solution :

= mass solute +  mass solvent

= 22.5 g + 58 g

= 80.5 g

% mass :

[tex]\tt =\dfrac{22.5}{80.5}\times 100\%\\\\=\boxed{\bold{27.95\%}}[/tex]

Learn more  

the mass in grams of 3.5 mol of the element gold.  

https://brainly.ph/question/1373453  

the mass percent  

https://brainly.ph/question/242314  

https://brainly.ph/question/241424  

#LetsStudy  

Pinahahalagahan namin ang bawat tanong at sagot na iyong ibinabahagi. Huwag kalimutang bumalik at magtanong ng mga bagong bagay. Ang iyong kaalaman ay mahalaga sa ating komunidad. Para sa mga de-kalidad na sagot, piliin ang IDNStudy.com. Salamat at bumalik ka ulit sa aming site.