Closed Chemistry

[Coleen Trinidad]

Patulong naman po dito:
A brass contains 70g of copper and 30g of zinc. Find the percentage of mass of each element.

 

[PHC-Hershey]

70+30 = 100
30/100 = 0.3 x 100 = 30% for zinc
70/100 = 0.7 x 100 = 70% for copper
Not sure haha

 

[Lightrash]

Check mo dito yun formula
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[LadyClare]

70+30 = 100
30/100 = 0.3 x 100 = 30% for zinc
70/100 = 0.7 x 100 = 70% for copper
Not sure haha

May kulang pa po.

 

[PHC-Hershey]

May kulang pa po.

haha kailangan ba kunin atomic mass ?

 

[LadyClare]

70g Cu *(1mol Cu/63.546 g Cu)=a
30g Zn *(1 mol Zn/65.38 g Zn)=b

Mass % of Cu= (a/(a+b))*100
Mass % of Zn= (b/(a+b))*100

 

[Coleen Trinidad]

70+30 = 100
30/100 = 0.3 x 100 = 30% for zinc
70/100 = 0.7 x 100 = 70% for copper
Not sure haha

Tama po mam haha. Yan po kasi yung tinuro samin. Nakalimutan lang haha ty po

 

[LadyClare]

Napaglumaan na yata ako hahaha. Sensya

 

[PHC-Hershey]

Tama po mam haha. Yan po kasi yung tinuro samin. Nakalimutan lang haha ty po

bakit parang ang basic, kung sabagay di naman given yung formula for brass

 

[ehiyehayant]

bakit parang ang basic, kung sabagay di naman given yung formula for brass

% mass lang naman. Simple lang.

 

[Dextroxe]

Andaya talaga ng mga teacher, pag example lang at sila ang sasagot o magpapaliwanag madali lang pag quiz o exam na mahirap na, wtf!

 

[ehiyehayant]

Haha. Kaya kailangan lang mag aral.

Andaya talaga ng mga teacher, pag example lang at sila ang sasagot o magpapaliwanag madali lang pag quiz o exam na mahirap na, wtf!