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
wolverine [178]
3 years ago
8

Justin mixed two clear liquids together during an experiment and made the following observations: The mixed liquids decreased in

temperature without any refrigeration or other action to change the temperature. The color of the liquid changed to blue. Which statement best describes Justin’s experiment? A. A physical change occurred, and this caused the liquid’s chemical properties to change. B. A chemical change occurred, and this caused the liquid’s physical properties to change. C. A physical change occurred, so only physical properties changed. D. A chemical change occurred, so only chemical properties changed.
Chemistry
1 answer:
kvasek [131]3 years ago
5 0

Answer:

B

Explanation:

A chemical change occurred, and this caused the liquid’s physical properties to change.

when we read her experiment we can see that color changed to blue, it is because new products are formed. And the temperature cause this.

You might be interested in
Which type of system must exist for chemical equilibrium
larisa86 [58]

Answer: closed system.

Explanation:

4 0
3 years ago
The British gold sovereign coin is an alloy of gold and copper having a total mass of 7.988 g, and is 22-karat gold.
azamat

Answer:

(a) m_{gold}=7.322g

(b)

V_{gold}=0.379cm^3

V_{copper}=0.122cm^3

(c) \rho _{coin}=15.94g/cm^3

Explanation:

Hello,

(a) In this case, with the given formula we easily compute the mass of gold contained in the sovereign  as shown below:

m_{gold}=\frac{m_{tota}*karats}{24}=\frac{7.988g*22}{24}=7.322g

(b) Now, by knowing the density of gold and copper, 19.32 and 8.94 g/cm³ respectively, we compute each volume, by also knowing that the rest of the coin contains copper:

V_{gold}=\frac{m_{gold}}{\rho_{gold}} =\frac{7.322g}{19.32g/cm^3}=0.379cm^3

m_{copper}=7.988g-7.322g=1.09g\\V_{copper}=\frac{m_{copper}}{\rho_{copper}}=\frac{1.09g}{8.94g/cm^3}  \\\\V_{copper}=0.122cm^3

(c) Finally, the volume is computed by dividing the total mass over the total volume containing both gold and copper:

\rho _{coin}=\frac{m_{total}}{V_{gold}+V_{copper}}=\frac{7.988 g}{0.379cm^3+0.122cm^3}\\  \\\rho _{coin}=15.94g/cm^3

Best regards.

3 0
3 years ago
Read 2 more answers
Which of the following are examples of physical properties
Natali [406]

Answer:

The answer is maybe reactivity

5 0
3 years ago
What dangerous element does Feista Wear contain
strojnjashka [21]

uranium oxide

Hope This Helps!       Have A Nice Day!!

3 0
3 years ago
Read 2 more answers
When carbon is burned in air, it reacts with oxygen to form carbon dioxide. When 14.4 g of carbon were burned in the presence of
Yanka [14]

Answer:

Mass of carbon dioxide produced = 52.8 g

Explanation:

Given data:

Mass of carbon react = 14.4 g

Mass of oxygen = 56.5 g

Mass of oxygen left = 18.1 g

Mass of carbon dioxide produced = ?

Solution:

C + O₂     →      CO₂

Number of moles of C:

Number of moles = mass/ molar mass

Number of moles = 14.4 g/ 12 g/mol

Number of moles = 1.2 mol

18.1 g of oxygen left it means carbon is limiting reactant.

Now we will compare the moles of C with CO₂.

                       C             :         CO₂

                        1             :          1

                      1.2           :          1.2

Mass of CO₂:

Mass = number of moles × molar mass

Mass = 1.2  mol × 44 g/mol

Mass = 52.8 g

8 0
2 years ago
Other questions:
  • What is the similarity between chalk, wood, candle and cotton?
    10·1 answer
  • Carlos is looking at a picture of a convergent boundary on which a volcanic arc and a trench are identified. Which type of conve
    14·1 answer
  • Enough energy is added to matter in the liquid state, it will change into a different state.
    5·1 answer
  • what is the substance called,that reaches Earthes surface and is made up of molten rock ,gasses and minerals
    9·2 answers
  • Could the other molecules in this simulation (argon, oxygen, and water) be considered pure substances? Explain your thinking.
    14·1 answer
  • What is the definition of force meter
    13·1 answer
  • How would you be able to use the spectrum of each gas to establish its identity
    13·1 answer
  • Which bond is most polar?
    5·1 answer
  • The flow of matter through the carbon and nitrogen cycle can be disrupted! The video clip explained an example in both the carbo
    13·1 answer
  • Enzymes are essential to cells because they are responsible to either making or breaking other molecules the cells need. True or
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!