
Concentratia procentuală.Atomul.Simbol chimic
Quiz
•
Chemistry
•
7th Grade
•
Medium

DIANA PRIHOANCA
Used 4+ times
FREE Resource
26 questions
Show all answers
1.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
Este adevarata afirmatia:
Concentratia procentuala reprezinta cantitatea de substanta dizolvata in 1000 grame solutie;
Masa solutie se noteaza cu md
md reprezinta masa dizolvantului
Concentratia procentuala are urmatoarea relatie de calcul:
c% = md*100/ms
2.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
In functie de masa dizolvatului masa solutiei poate fi scrisa ca fiind suma dintre :
md + m apa
ms + m apa
md + ms
3.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
Soluţiile sunt amestecuri omogene formate din 2 sau mai multe substanţe între care………….fenomene chimice
Au loc
Nu au loc
4.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
Calculeaza concentratia procentuala obtinuta prin dizolvarea a 65 g zahar in 135 g apa.
3,25%
65%
32,5%
5.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
Calculeaza masa de substanta dizolvata necesara pentru a obtine 500 g solutie de concentratie 50 %.
250g
25g
0,25Kg
2,5 kg
6.
FILL IN THE BLANK QUESTION
30 sec • 1 pt
Sa se calculeze concentratia unei solutii obtinute prin amestecarea 65 g solutie de concentratie 28%, cu 115 g solutie de concentratie 68%.
7.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
Concentraţia procentuală este:
Cantitatea de soluţie din 100g
Cantitatea de substanţă dizolvată în 100g soluţie
Cantitatea de substanţă transformată in 100g
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