What will weigh more when a chemical change is complete? The reactants before the chemical reaction, or the product after the reaction is complete?

The product always weighs more than the reactant

The reactant will weigh more than the product

They both will loose mass after the reaction

Suppose a reaction were to happen in an open container in a lab. During the reaction, the scientist observes the chemicals bubble, and produce a gas. During the analysis the scientist notices that the reactants weighed 20 g when he started, and the product weighed 18 g. Explain what happened.

The gas that was produced was not able to be weighed since the container was open.

His chemical reaction defied the law of conservation of mass

The product destroyed mass during the reaction

The reactants created matter during the reaction

Law of Conservation of Matter

8th Grade

•

18 Qs

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Law of Conservation of Matter

Quiz

•

Chemistry

•

8th Grade

•

Practice Problem

•

Medium

•

NGSS

MS-PS1-5, MS-PS1-1, MS-PS1-2

Standards-aligned

Susan Tobiasson

Used 78+ times

FREE Resource

18 questions

Show all answers

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Fill in the blank:
The law of conservation of mass states that matter cannot be created nor __________________.

destroyed

rearranged

transferred

changed

Tags

NGSS.MS-PS1-5

MULTIPLE CHOICE QUESTION

1 min • 1 pt

In a closed system, a chemical reaction takes place. The mass of the reactants in the beginning of the reaction is 25g. What does the mass have to be in the end of the reaction in order to follow the law of conservation of mass?

25g

You can't tell with the given information.

30g

15g

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The following chemical reaction occurs:
2S + 3O₂ -> 2SO₃_{How many atoms of oxygen are there in the reactant?}

2 atoms of oxygen

3 atoms of oxygen

6 atoms of oxygen

1 atom of oxygen

Tags

NGSS.MS-PS1-1

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

There are two reactants in a chemical equation, and one product. The mass of the product is 30g. The mass of the first reactant is 17g. What must the mass of the second reactant be, if the equation is to follow the law of conservation of mass?

47g

13g

23g

You cant tell with the given information

Tags

NGSS.MS-PS1-5

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Students complete a reaction with baking soda & vinegar.
Which of the following would provide evidence that the number of atoms present before a chemical reaction is equal to the number of atoms present after the chemical reaction?

The mass of the plastic bag, baking soda, and vinegar before the reaction was equal to the mass after the reaction.

Bubbles were produced during the reaction, which meant that a gas was being produced.

The plastic bag did not change in any way, indicating that it was not involved in the reaction.

The mass of the baking soda was exactly equal to the mass of the vinegar used to create the chemical reaction.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In a reaction A + B ----> C, reactant A has 5g and product C has 9g. How many grams does reactant B should have?

14g

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

MULTIPLE CHOICE QUESTION

30 sec • 12 pts

If reaction starts with 20g of reactants it should produce

a total of 40g of products

a total of 10g of products

a total of 80 g of products

a total of 20g of products

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

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Law of Conservation of Matter

18 questions

Fill in the blank:
The law of conservation of mass states that matter cannot be created nor __________________.

In a closed system, a chemical reaction takes place. The mass of the reactants in the beginning of the reaction is 25g. What does the mass have to be in the end of the reaction in order to follow the law of conservation of mass?

The following chemical reaction occurs:
2S + 3O₂ -> 2SO₃_{How many atoms of oxygen are there in the reactant?}

There are two reactants in a chemical equation, and one product. The mass of the product is 30g. The mass of the first reactant is 17g. What must the mass of the second reactant be, if the equation is to follow the law of conservation of mass?

Students complete a reaction with baking soda & vinegar.
Which of the following would provide evidence that the number of atoms present before a chemical reaction is equal to the number of atoms present after the chemical reaction?

In a reaction A + B ----> C, reactant A has 5g and product C has 9g. How many grams does reactant B should have?

If reaction starts with 20g of reactants it should produce

Ca + O₂ --> CaO
What coefficient goes in front of CaO?

Is this equation balanced?

Is this equation balanced?

Create a free account and access millions of resources

Similar Resources on Wayground

Popular Resources on Wayground

Discover more resources for Chemistry

Law of Conservation of Matter

18 questions

Fill in the blank:The law of conservation of mass states that matter cannot be created nor __________________.

In a closed system, a chemical reaction takes place. The mass of the reactants in the beginning of the reaction is 25g. What does the mass have to be in the end of the reaction in order to follow the law of conservation of mass?

The following chemical reaction occurs:2S + 3O2 -> 2SO3How many atoms of oxygen are there in the reactant?

There are two reactants in a chemical equation, and one product. The mass of the product is 30g. The mass of the first reactant is 17g. What must the mass of the second reactant be, if the equation is to follow the law of conservation of mass?

Students complete a reaction with baking soda & vinegar. Which of the following would provide evidence that the number of atoms present before a chemical reaction is equal to the number of atoms present after the chemical reaction?

In a reaction A + B ----> C, reactant A has 5g and product C has 9g. How many grams does reactant B should have?

If reaction starts with 20g of reactants it should produce

Ca + O2 --> CaOWhat coefficient goes in front of CaO?

Is this equation balanced?

Is this equation balanced?

Create a free account and access millions of resources

Similar Resources on Wayground

Popular Resources on Wayground

Discover more resources for Chemistry

Fill in the blank:
The law of conservation of mass states that matter cannot be created nor __________________.

The following chemical reaction occurs:
2S + 3O₂ -> 2SO₃_{How many atoms of oxygen are there in the reactant?}

Students complete a reaction with baking soda & vinegar.
Which of the following would provide evidence that the number of atoms present before a chemical reaction is equal to the number of atoms present after the chemical reaction?

Ca + O₂ --> CaO
What coefficient goes in front of CaO?