What is one of the main postulates of Dalton’s atomic theory?
Quiz Dalton's Atomic Theory and Supporting Laws

Quiz
•
Chemistry
•
9th - 12th Grade
•
Easy

ARMANDO VIEIRA
Used 1+ times
FREE Resource
20 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Atoms are destroyed during chemical reactions.
Atoms combine in fixed, whole-number ratios to form compounds.
Atoms are always visible under a microscope.
Atoms are created during chemical reactions.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What does the Law of Conservation of Mass state?
Mass is destroyed in a chemical reaction.
Mass can only increase during chemical reactions.
Mass is neither created nor destroyed during chemical reactions.
Mass depends on the volume of the reactants.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the Law of Definite Proportions?
Compounds are made of elements in random proportions.
Compounds always contain the same elements in the same mass ratio.
Elements combine in any ratio to form compounds.
Elements always react to form identical masses.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which statement best describes the Law of Multiple Proportions?
Elements combine in any ratio to form compounds.
When elements form more than one compound, the masses of one element combine with a fixed mass of the other in whole-number ratios.
Atoms in compounds are always identical.
Compounds always have the same number of atoms of each element.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Sample Problem: Law of Conservation of Mass In a reaction, 12.5 grams of calcium reacts with 19.8 grams of chlorine to form calcium chloride. What is the total mass of calcium chloride produced?
32.3 grams
30.0 grams
20.0 grams
34.5 grams
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Sample Problem: Law of Definite Proportions Two samples of water are analyzed. Sample 1: 2.00 grams of hydrogen combine with 16.00 grams of oxygen. Sample 2: 4.00 grams of hydrogen combine with 32.00 grams of oxygen. What do these results show?
Water always contains hydrogen and oxygen in a fixed ratio by mass.
Water contains hydrogen and oxygen in random proportions.
Water’s composition changes depending on the source.
Water’s mass ratio depends on the temperature.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Sample Problem: Law of Multiple Proportions Two compounds made of nitrogen and oxygen are analyzed. Compound A: 2.80 grams of nitrogen combine with 1.60 grams of oxygen. Compound B: 2.80 grams of nitrogen combine with 3.20 grams of oxygen. What is the ratio of oxygen in Compound A to Compound B?
1:1
1:2
2:1
3:2
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