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
MaRussiya [10]
2 years ago
10

Which of these involves the formation of a new chemical substance?

Chemistry
1 answer:
Len [333]2 years ago
4 0

Which of these involves the formation of a new chemical substance?

a. evaporation of gasoline

b. mixing salt and pepper

c. dissolving sugar in tea

d. rusting of an iron chain

\\

<h2><u>Answer:</u></h2>
  • D. Rusting of an iron chain

__________

<u>A. Evaporation of gasoline</u>

  • It does not form any chemical substance. Evaporation, is part of a physical change. Physical change only changes in its physical characteristics. Evaporation changes from liquid, to gas. Therefore, it is a physical change.

<u>B. Mixing salt and pepper</u>

  • No new substance formed. It does not form any chemical substance nor chemical change. When you mix salt and pepper, it only is a mixture wherein no new material can be form. Therefore, this is physical change as well.

<u>C. Dissolving sugar in tea</u>

  • When you dissolve sugar in your tea, it only changes the taste of the tea to sweet. Taste is part of the characteristic of physical change. It does not form any chemical substance nor chemical change. Therefore, this is physical change.

<u>D. Rusting of an iron chain</u>

  • Rusting is one of the common examples of chemical change in our daily lives. Rust is the new substance formed. However, this is considered as chemical change because this is irreversible or cannot be returned to its original substance/material. Finally, rusting of an iron chain involves the formation of new chemical substance.

<em><u>Hence, the answer is D. Rusting of an iron chain.</u></em>

You might be interested in
Two jars are placed on a counter with a McDonald's French Fry inside, one has a lid, the other does not. They are left alone to
Agata [3.3K]

Answer: days

Explanation: controlled variable is that they put it in 2 jars for 2 days one with a lid and one with no lid. dependent is how long it was there (2) days. Independent is you left it in one place for the whole 2 days. i think.

7 0
3 years ago
*
Nana76 [90]

Answer:

Therefore, when an atom becomes a positive ion is pulls its electrons closer, decreasing is radius moreover, when it becomes a negative ion, it pulls its electrons closer and decreases the radius.

5 0
2 years ago
What is the relationship between Force and Velocity?
PIT_PIT [208]

Answer:

Cause/ effect relationship.

Explanation:

because the force is the cause of energy that is present and velocity is the effect (speed) that is present.

7 0
2 years ago
How many moles are there in 990 grams of sugar, C12H22011? (Sig Figs, do not
Nitella [24]

Answer:

Number of moles = 2.89 mol

Explanation:

Given data:

Number of moles of sugar  = ?

Mass of sugar = 990 g

Solution:

Formula:

Number of moles = mass/molar mass

Molar mass of C₁₂H₂₂O₁₁:

12× 12 + 22×1.008 + 16×11 = 342.2 g/mol

Number of moles = 990 g / 342.2 g/mol

Number of moles = 2.89 mol

6 0
3 years ago
15.1 L N2 at 25 °C and 125 kPa and 44.3 L O2 at 25 °C and 125 kPa were transferred to a tank with a volume of 6.25 L. What is th
Y_Kistochka [10]

Answer:

The total pressure of the mixture in the tank of volume 6.25 litres at 51°C  is 1291.85 kPa.

Explanation:

For N2,

                Pressure(P₁)=125 kPa

                  Volume(V₁)=15·1 L

                Temperature (T₁)=25°C=25+273 K=298 K

Similarly, for Oxygen,

                   Pressure(P₂)= 125 kPa

                   Volume(V₂)= 44.3 L

                  Temperature(T₂)=25°C= 298 K

Then, for the mixture,

              Volumeof the mixture( V)= 6.25 L

                                     Pressure(P)=?

                Temperature (T)= 51°C = 51+273 K=324 K

Then, By Combined gas laws,

                                 \frac{P_{1} V_{1} }{T_{1} } +\frac{P_{2} V_{2} }{T_{2} } =\frac{PV}{T}

                      or, \frac{15.1*125}{298} +\frac{44.3*125}{298} =\frac{P*6.25}{324}

                     or, 6.34+18.58=\frac{P*6.25}{324}

                     or, P=\frac{24.92*324}{6.25}

                        ∴P=1291.85 kPa

So the total pressure of the mixture in the tank of volume 6.25 litres at 51°C  is 1291.85 kPa.

3 0
3 years ago
Other questions:
  • Calculate the boiling point of a 2.00 molal solution of magnesium perchlorate, mg(clo4)2, in water.
    9·1 answer
  • For the following aqueous reaction, complete and balance the molecular equation and write a net ionic equation, making sure to i
    12·1 answer
  • How are each of these seeds most likely spread from place to place
    6·1 answer
  • How does the percent of salt and sand from the beginning compared to the same percentage after performing the experiment?​
    9·1 answer
  • BRAINLIEST ANSWER!
    11·1 answer
  • Find the percentage compositions<br> CaCl2<br> Ca:<br> CI:
    7·1 answer
  • How many milliliters of a 0.40%(w/v) solution of nalorphine must be injected to obtain a dose of 1.5 mg?
    7·1 answer
  • 17. Which of the following represent the correct net ionic equations from the double replacement reaction of
    13·1 answer
  • I'll mark you the brainlest just answer the question
    9·1 answer
  • Find the atomic numbers of the as yet undiscovered next two members of the series.
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!