Concentratia procentuală.Atomul.Simbol chimic

Concentratia procentuală.Atomul.Simbol chimic

7th Grade

26 Qs

quiz-placeholder

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Concentratia procentuală.Atomul.Simbol chimic

Concentratia procentuală.Atomul.Simbol chimic

Assessment

Quiz

Chemistry

7th Grade

Medium

Created by

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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