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
BigorU [14]
3 years ago
9

Theresa creates an experiment where she mixes two red-colored substances together in a container and observes the solution slowl

y changing from red to blue for the next eight minutes. The solution becomes completely blue after eight minutes. What does this represent about the type of change happening in the container?
Chemistry
1 answer:
vlada-n [284]3 years ago
7 0

Complete Question:

Theresa creates an experiment where she mixes two red-colored substances together in a container and observes the solution slowly changing from red to blue for the next eight minutes. The solution becomes completely blue after eight minutes. What does this represent about the type of change happening in the container?

Group of answer choices

A. A chemical change started immediately and finished at eight minutes.

B. A non-chemical change started immediately and finished at eight minutes.

C. A chemical change occurred at four minutes.

D. A non-chemical change occurred at four minutes.

Answer:

A. A chemical change started immediately and finished at eight minutes.

Explanation:

A chemical reaction can be defined as the chemical process which typically involves the reaction between two or more chemical elements (substances) to form a new compound, through the rearrangement of the ionic or molecular structure of each chemical element.

This ultimately implies that, a chemical reaction is a chemical change that immediately starts when two or more molecules of a chemical element (substance) known as reactants are combined together to form a new product (compound).

In this scenario, Theresa creates an experiment where she mixes two red-colored substances together in a container and observes the solution slowly changing from red to blue for the next eight minutes. The solution becomes completely blue after eight minutes. Thus, what this represent about the type of change happening in the container is that, a chemical change (from red to blue) started immediately and finished at eight minutes.

You might be interested in
Convert 4 x 10^-3 dL to cm^3 <br><br> Please give the work and the answer in scientific notation.
Serhud [2]

4 x  10^{-3 in dL will be 4 x  10^{-1}  cm^3

<h3>Conversion from dL to cm^3</h3>

Recall that:

Deci = 10^{-1}

Centi = 10^{-2}

Thus, 1 dl = 100 ml

This means that converting from dl to  cm^3 requires multiplying by 10^2.

Applying this principle, 4 x 10^{-3 in dL to  cm^3 will be:

4 x 10^{-3 x  10^2 cm^3 = 4 x  10^{-1}  cm^3

Therefore,  4 x 10^{-3 dl will be 4 x  10^{-1}  cm^3

More on volume conversion can be found here:

#SPJ1

3 0
2 years ago
When weather starts to average out in a pattern over many years, like 30 years, scientists can calculate the average weather con
meriva

Answer:

the earth is different in all places

Explanation:

6 0
3 years ago
Hi how has your day been
Lady bird [3.3K]

Answer:

good man thanks

Explanation:

8 0
3 years ago
Read 2 more answers
Describe briefly the changes from the control values in the MEAN values for volume, specific gravity and NaCl after drinking pur
Yuri [45]

Answer:

As specific gravity is defined as weight per unit volume,so urine is the less dense fluid,so urine will be in hyperosmotic category.

8 0
4 years ago
An imaginary planet was just discovered that has a similar environment to our planet Earth. All the chemistry is similar except
Lena [83]

Answer: \Delta H_{rxn}=-4652 kJ/mol

Explanation: In a reaction, a bond of a molecule can break or rearrange itself. When it happens, it absorb or release energy.

<u>Bond</u> <u>Energy</u> is the energy necessary to break or to make a particular bond, producing gaseous fragments at atmospheric temperature. This type of energy can be used to show how stable a compound is or how easy a bond can break.

<u>Enthalpy</u> <u>of</u> <u>Reaction</u> is the energy absorption or release at a constant temperature resulting from a chemical reaction.

To calculate the Enthalpy using bond energy, you have:

1) Write the balanced equation with all the all the reactants and products in gaseous form:

C_{5}H_{12}_{(g)}+8O_{2}_{(g)} ⇒ 5CO_{2}_{(g)}+6H_{2}O_{(g)}

2) Count each bond of each molecule from both sides, including double or triple bonding, if they exists:

Reactants:

C_{5}H_{12} : 12 C-H

            4 C-C

O₂ : 1 O=O

Products:

CO₂ : 2 C=O

H₂O : 2 H-O

3) From the balanced reaction, we there are 8 moles of oxygen gas, 5 moles of carbon dioxide and 6 moles of water, which has to be included when adding each side.

\Sigma H_{reactants}= 12.257 + 4.370 + 8.490 = 8484

\Sigma H_{products}= 5.2.740 + 6.2.478 = 13136

4) Calculate Enthalpy of Reaction by:

\Delta H_{rxn}= \Sigma H_{reactants}-\Sigma H_{products}

\Delta H_{rxn}=8484-13136

\Delta H_{rxn}=-4652

The enthalpy of reaction for the combustion of 1 mole of pentane on a just discovered imaginary planet is an exothermic process of magnitude \Delta H_{rxn}= - 4652kJ/mol

8 0
3 years ago
Other questions:
  • Which atoms in the cfc molecule can destroy thousands of ozone molecules in the upper atmosphere?
    9·2 answers
  • Exosolar planets were discovered by observing their _____ wobble back and forth
    8·2 answers
  • The frequency factors for these two reactions are very close to each other in value. Assuming that they are the same, compute th
    9·1 answer
  • A mammoth skeleton has a carbon-14 decay rate of 0.49 disintegrations per minute per gram of carbon (0.49 dis/min⋅gC ). You may
    10·1 answer
  • 1) The crystal of potassium chloride is composed of A) potassium chloride molecules B) potassium atoms and chlorine atoms C) pot
    15·1 answer
  • 9. If purple flowers are dominant to white flowers and
    8·2 answers
  • How much heat must absorbed by the reaction system to convert 100g of NaNO3 into NaHSO4(s)?
    7·1 answer
  • The mass of 25 cm 3 of brass is 210 g calculate the density of brass​
    12·2 answers
  • Which of the following molecules has the same empirical formula as glucose (C6H1206)
    6·2 answers
  • The fastest train in the world can travel 1,500 kilometers in 3 hours. What is its speed?
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!