Law of Conservation of Math

Antonio conducts an investigation by adding reactants in a sealed container, as shown in the illustration. One of the reactants is 19g and the other reactant is 5g. After the reaction, Antonio can predict the total mass of the products of this reaction to be which of the following?

• 5g

• 14g

• 19g

• 24g

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NGSS.MS-PS1-2

NGSS.MS-PS1-5

A chemical reaction can be defined as an interaction of chemicals that produces new chemicals. An illustration of a chemical reaction is provided. Taking into account the law of conservation of mass, the most reasonable conclusion is that the missing product from the reaction illustrated here would consist of what?

• One oxygen atom and one hydrogen atom

• One chlorine atom and two hydrogen atoms

• One oxygen atom and three hydrogen atoms

• Two chlorine atoms and three hydrogen atoms

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NGSS.MS-PS1-2

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Which of the following best describes the Law of Conservation of Mass?

• Mass can be created or destroyed in a chemical reaction.

• Mass is conserved and cannot be created or destroyed in a chemical reaction.

• Mass is always lost in a chemical reaction.

• Mass is irrelevant in chemical reactions.

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NGSS.MS-PS1-2

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In a closed system, the mass of reactants is 50g. According to the Law of Conservation of Mass, what should be the mass of the products?

• 45g

• 50g

• 55g

• 60g

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NGSS.MS-PS1-5

Which experiment is most commonly associated with the Law of Conservation of Mass?

• Rutherford's gold foil experiment

• Lavoisier's combustion experiment

• Millikan's oil drop experiment

• Thomson's cathode ray experiment

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NGSS.MS-PS1-5

If 10g of hydrogen reacts with 80g of oxygen to form water, what is the total mass of water produced?

• 70g

• 80g

• 90g

• 100g

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NGSS.MS-PS1-5

Which equation represents the Law of Conservation of Mass?

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NGSS.MS-PS1-5

In a chemical reaction, 5g of substance A reacts with 15g of substance B. What is the total mass of the products?

• 10g

• 15g

• 20g

• 25g

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NGSS.MS-PS1-5

What is the significance of the Law of Conservation of Mass in chemical equations?

• It allows for the prediction of energy changes.

• It ensures that equations are balanced.

• It predicts the speed of reactions.

• It determines the color of compounds.

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NGSS.MS-PS1-5

Which of the following is a real-world application of the Law of Conservation of Mass?

• Balancing chemical equations in industrial processes

• Predicting weather patterns

• Designing electrical circuits

• Creating computer algorithms

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