The drawing above shows a model developed to represent the chemical reaction of copper with acetic acid to form copper acetate. Based on the model, what is the atomic composition of copper acetate? Select the correct breakdown of atoms.

1 copper atom, 6 hydrogen atoms, 4 oxygen atoms, 4 carbon atoms

1 copper atom, 8 hydrogen atoms, 4 oxygen atoms, 4 carbon atoms

2 copper atoms, 16 hydrogen atoms, 8 oxygen atoms, 8 carbon atoms

1 copper atom, 5 hydrogen atoms, 5 oxygen atoms, 4 carbon atoms

Which model (the bottom options) represents the product of the reaction in the top model?

Model 1 is the accurate representaion. There were 24 hydrogen, 6 carbon, and 26 oxygen atoms in the reactants and the products.

Model 2 is the accurate representation of the products. The reactants have 54 atoms and so do the products.

Neither of the models are accurate because they do not show methane as a product.

Both models are acceptable models of the products.

Which change will produce a new substance, and why?

Burning a piece of bread in a toaster because burning is a chemical reaction with oxygen.

Dissolving cocoa mix in water because you get a substance that tastes different after the items are mixed.

Heating water until it evaporates; the salts that are left behind are evidence of a chemical reaction.

Cooling water until it freezes.

Your teacher gives you a clear liquid, a green powder, and a red powder. You and your partner have designed an investigation to see if, when mixed together, they will produce a chemical reaction. What evidence would you look for to determine whether a chemical reaction occurred? Select all that apply.

Temperature change (hotter or colder)

Bubbles as evidence of a gas forming

Change of color or a new solid formed

A change in any of the properites of the powders or liquid

When an electric current is run through water, the water separates into hydrogen and oxygen molecules. How do you know that electrolysis is not a phase change?

This is a chemical reaciton and not a phase change becuase new substances (or products), oxygen and hydrogen gases, were formed from the old substance (or reactant) which is water.

In a phase change, you still have the same substance. Electrolysis caused the water molecule to change into water vapor.

This was a phase chane because the liquid water changed to a gas.

This interaction could not have been a chemiocal reaction because a chemical reaction needs two or more reactants.

Ms. Hawk set up a demonstration to show what happens when the metal zinc is added to a test tube containing hydrochloric acid. Students noticed that the test tube felt warmer after adding the zinc and the zinc decreased in size even though it is not soluble in hydrochloric acid (see diagram below). Which of the following indicates a chemical reaction has taken place? Select all that apply.

The balloon filled with a gas which is a new substance.

The test tube feeling warmer is evidence of a chemical reaction.

The piece of zinc gets smaller over time but is not soluble in hydrochloric acid.

The students did not see any bubbles near the zince so there was no chemical reaction.

Mr. Lee poured two colorless liquids together at room temperature and a solid, yellow substance was formed. Which statement best explains why this demonstration was a chemical reaction?

A yellow substance formed - a precipate from the chemical reaction.

One of the liquids changed into a solid.

One liquid dissolved into the other liquid.

The color of the liquids changed.

A chemical reaction between two molecules of hydrogen gas 2H 2 and one molecule of oxygen gas O 2 forms two molecules of water 2H 2 O. Rosalie makes a model to represent this reaction, but it has an error. What can Rosalie do to correct her model?

Add another hydrogen atom to the product that only has one hydrogen atom.

Change the reactants to three molecules each with one hydrogen and one oxygen atom.

Change the product to one molecule of four hydrogen atoms.

Erase the extra hydrogen atom from one of the reactant molecules.

How Can I Make New Stuff From Old? Learning Set 2

Authored by Kevin DePeel

Science

6th - 8th Grade

NGSS covered

Used 13+ times

How Can I Make New Stuff From Old? Learning Set 2

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21 questions

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MULTIPLE CHOICE QUESTION

5 mins • 1 pt

What is the formula for density?

D=m/v

D=v/m

D=w/m

D=m/w

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Which of the following is a chemical reaction?

Burning paper

Chopping wood

Tearing paper

Smashing rocks

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

The reactants are on the ________ side of a chemical equation.

Right

Left

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

The products are on the ____________ side of a chemical equation.

Right

Left

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

What are the reactants in the following equation?
2H₂+ O₂→ 2H₂O

2H₂ + O₂

2H₂O

O₂

2H₂

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

What are the products in the following chemical equation?
Na + OH → NaOH

Na + OH

NaOH

Tags

NGSS.MS-PS1-1

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

How many atoms are in NaOH?

Tags

NGSS.MS-PS1-1

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How Can I Make New Stuff From Old? Learning Set 2

What is the formula for density?

Which of the following is a chemical reaction?

The reactants are on the ________ side of a chemical equation.

The products are on the ____________ side of a chemical equation.

What are the reactants in the following equation?
2H₂+ O₂→ 2H₂O

What are the products in the following chemical equation?
Na + OH → NaOH

How many atoms are in NaOH?

How many atoms are in 2H₂O₂?

Mya needs to find the volume of an unusual shaped rock. She uses the displacement method to find the volume of the rock. If her beaker has 200mL of water in it to start with and ends with 275mL after adding the rock, what is the volume of the rock?

Which of the following is a synthetic material?

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Similar Resources on Wayground

Popular Resources on Wayground

Discover more resources for Science

How Can I Make New Stuff From Old? Learning Set 2

What is the formula for density?

Which of the following is a chemical reaction?

The reactants are on the ________ side of a chemical equation.

The products are on the ____________ side of a chemical equation.

What are the reactants in the following equation?2H2 + O2 → 2H2O

What are the products in the following chemical equation?Na + OH → NaOH

How many atoms are in NaOH?

How many atoms are in 2H2O2?

Mya needs to find the volume of an unusual shaped rock. She uses the displacement method to find the volume of the rock. If her beaker has 200mL of water in it to start with and ends with 275mL after adding the rock, what is the volume of the rock?

Which of the following is a synthetic material?

Access all questions and much more by creating a free account

Similar Resources on Wayground

Popular Resources on Wayground

Discover more resources for Science

What are the reactants in the following equation?
2H₂+ O₂→ 2H₂O

What are the products in the following chemical equation?
Na + OH → NaOH

How many atoms are in 2H₂O₂?