1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
e-lub [12.9K]
3 years ago
5

Aurelia dropped a piece of metal into a beaker, and then she added acid to it. She saw colorless bubbles rising from the metal.

The metal began to turn black. What type of change did Aurelia see?
Chemistry
2 answers:
Andrew [12]3 years ago
5 0

Answer:

chemical, because a new gas was formed

Explanation:

that was the answer on study island :/

timofeeve [1]3 years ago
4 0

Answer:

Chemical change

Explanation:

From all indicators, Aurelia is seeing a chemical change occurring in the reaction here.

A chemical change is a change in which new substances are produced. For every chemical change:

  • they are not easily reversible
  • they lead to production of new kinds of substances
  • involves mass change
  • require considerable amount of energy.

We start off and end with:

         Metal   +     Acid →     Black metal     +    rising gaseous bubbles

Clearly, it is shown that new products are formed and this reaction is impossible to reverse in order to get the reactants back.

This is a typical chemical change.

You might be interested in
Dinitrogen trisulfide symbol
notka56 [123]
The symbol for dinitrogen trisulfide is N2S3
4 0
3 years ago
Read 2 more answers
Which of the following is a reason that a scientist would want to use a model to study DNA? A. DNA may not really exist
Otrada [13]

I think it is D but i'm not sure

hope I helped :)

7 0
2 years ago
Draw the curved arrow mechanism for the formation of an acetal from acidic methanol and 4-methylpentan-2-one in the fewest steps
morpeh [17]

Answer:

See explanation below

Explanation:

This reaction is known as Ketone hydrolisis in acid medium. This involves the formation of an hemi cetal, and then, the acetal. This is often used to convert ketones or aldehydes in ethers.

The first step involves the reaction with the acid. The carbonile reacts with the acid and forms an alcohol there. The next step is the reaction of the alcohol, in this case, the methanol to form the hemi cetal. Then in the third step, we repeat the first step, using acid to turn the OH group into a great leaving group such water. Then the water leaves the molecule, leaving the space wide open in the next step for methanol, and the acetal is formed.

See picture for the curved arrow mechanism

7 0
3 years ago
Identify the following example as a physical or chemical change. Moisture in the air forms beads of water on a cold window pane.
denis23 [38]

<u>Answer:</u> The given example is a physical change.

<u>Explanation:</u>

A chemical change is defined as the change in which chemical composition of a substance changes and results in the formation of a new substance. These are usually irreversible process.

A physical change is defined as the change in which only the shape and size of the substance changes and no new substance is formed. Only phase change occurs in these processes. These are usually considered as a reversible change.

For the given example: Moisture in the air forms beads of water on a cold window pane.

This is a physical change because water was initially present in the gaseous state (Moisture in the air) and when it is coming in contact with the cold window pane, the gaseous state of water gets converted into a liquid state.

Hence, the given example is a physical change.

6 0
3 years ago
Which symbol in a chemical equation separates the reactants from the products ?
Lana71 [14]

Answer:

Explanation:

The arrow symbol in a chemical equation separates the reactants from products. A chemical reaction is process in which chemical changes leads to the formation of products from reactants.

4 0
3 years ago
Read 2 more answers
Other questions:
  • What depends on public opinion and support? A. regulations at a local level B. enforcement of laws C. success of a policy D. rev
    11·1 answer
  • The formula for chlorine dioxide
    15·2 answers
  • A solution of potassium cyanide, KCN, is made by dissolving 3.2 g of KCN in water. When this solution reacts with excess hydroch
    13·2 answers
  • Which two elements have properties that are the most similar?
    8·1 answer
  • NaOH has a molarity of 2.5 M and a volume of 4 Liters, how many moles are in<br> the solution?
    14·1 answer
  • This dipeptide is designated as: there is a structure for h3nchcnhchco with ch2oh group attached to the first (from left to righ
    14·1 answer
  • Select the answer that CANNOT be used to fill in the blank in the following sentence:
    11·1 answer
  • 12) A 17.92 g sample of copper was submerged in water, and the volume reading rose by 2.00 mL. What is the density of the copper
    12·1 answer
  • Calculate the heat (in calories) released when 115 g of CHCl3 changes from a liquid to a solid at
    7·1 answer
  • Which of these statements describes a physical property of hydrogen? Group of answer choices it is found in acids. it is less de
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!