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
Rudik [331]
3 years ago
10

Is hot asphalt poured onto flat ground cools to from a solid road surface a physical or chemical change?

Chemistry
2 answers:
Phantasy [73]3 years ago
8 0

When hot asphalt is poured onto flat ground cools to form a solid road surface is a <em>chemical change.</em>

Asphalt is a plastic hydrocarbon ,when in liquid condition reacts with oxygen in air to react  to become a solid.

aliina [53]3 years ago
7 0
  1. ⇒<em><u>Tar is mainly made up of a collection of very heavy hydrocarbons, with rather high melting temperatures. Commonly, it is mixed with some stones or gravel to make a harder surface for roads. It is possible to heat this up to soften or melt this; you can try it yourself by heating it in a metal can over a stove (don't use a container that you plan to keep clean) or in a wood or coal fire.</u></em>
  2. <em><u>it is reversible</u></em>
You might be interested in
The mass of an object is 32g and its density is 17g /mL. what is its volume
guajiro [1.7K]

Explanation:

here,

Mass (m)= 32 g =0.32 kg

Density(d)= 17 g/ml

volume (v)=?

we know that,

d=m/v

17=0.32/v

v= 0.32/17

v=0.018<u> </u>

3 0
3 years ago
Read 2 more answers
What solution can you add to of the mixture of NH4 (aq) and Ca2 (aq) to precipitate one cation while keeping the other cation in
vekshin1

Answer:H2SO4

Explanation:calcium forms a precipitate in a sulfide compound of so4

7 0
4 years ago
Number of electrons present in 3.6mg of NH₄⁺?​
nata0808 [166]
0.0036g of NH4+ x 1mol of NH4+/18.04g of NH4+ x 6.02*10^23 electrons of NH4+/1mol of NH4+

= 1.20 x 10^20 electrons of NH4+
4 0
3 years ago
Question 2 (1 point)<br> Al + S8 = Al2S3<br> When balanced, what is the coefficient of Al?
gtnhenbr [62]

Answer:

16

Explanation:

FIRST AND FOREMOST, BALANCE YOUR EQUATION.

Al + S8 ➡️ Al2S3

Numbers of Al=1. ➡️ Numbers of Al = 2

Numbers of S =8. ➡️ Numbers of S. = 3

USE COEFFICIENT TO BALANCE THE EQUATION.

16Al + 3S8 ➡️ 8Al2S3

Now the Numbers of Al and S in both sides of eqn. is balanced

The Answer Is 16

3 0
3 years ago
Read 2 more answers
How many milliliters of 0.100 M NaOH are required to neutralize the following solutions?
gulaghasi [49]

Answers:

  • a.) 10.0 mL of 0.0500 M HCl: 5.00 ml
  • b.) 25.0 mL of 0.126 M HNO₃: 31.5 ml
  • c.) 50.0 mL of 0.215 M H₂SO4: 215. ml

Explanation:

All the reactions are the neutralization of strong acids with the same strong base.

At the neutralization point you have:

  • number of equivalents of the base = number of equivalent of the acid

And the number of equivalents (#EQ) may be calculated using the normality (N) concentration and the volume (V)

  • # EQ = N × V

Then, at the neutralization point:

  • # EQ acid = N acid × V acid

  • # EQ base = N base × V base

  • # EQ acid = # EQ base

  • N acid × V acid = N base × V base

Also, you can use the formula that relates normality with molarity

  • N = M × number of hydrogen or hydroxide ions

<u>a.) 10.0 mL of 0.0500 M HCl</u>

  • The number of hydrogen ions for HCl is 1 and the number of hydroxide ions for NaOH is 1.

  • 10.0 ml × 0.0500 M × 1 = V base × 0.100 M × 1

         ⇒ V base = 10.0 ml ×0.0500 M / 0.100 M = 5.00 ml

<u>b.) 25.0 mL of 0.126 M HNO₃</u>

  • The number of hydrogen ions for HNO₃ is 1 and the number of hydroxide ions for NaOH  is 1.

  • 25.0 ml × 0.126 M × 1 = V base × 0.100 M × 1

         ⇒ V base = 25.0 ml ×0.126 M / 0.100 M = 31.5 ml

<u>c.) 50.0 mL of 0.215 M H₂SO4</u>

  • The number of hydrogen ions for H₂SO4 is 2 and the number of hydroxide ions for NaOH  is 1.

  • 50.0 ml × 0.215 M × 2 = V base × 0.100 M × 1

         ⇒ V base = 50.0 ml ×0.215 M × 2 / 0.100 M = 215. ml

7 0
4 years ago
Other questions:
  • Choose the correct coefficients for the following reaction:
    9·1 answer
  • What is the reaction quotient?
    12·1 answer
  • Complete the mechanism for the reaction of 2-methylbutan-2-ol in sulfuric acid
    6·1 answer
  • A sample of a gas takes up 2.35L of space at room temperature (20.0ºC). What volume will the gas occupy at -5.00ºC? (Hint: Don’t
    8·1 answer
  • How do you read a data table?
    7·1 answer
  • If an Oreo cookie is 0.654 cm thick, how many Oreos does it take to reach the moon
    12·1 answer
  • Pure nitrobenzene freezes at 5.67 C. When 1.0g of ethanol (C2H6O) is mixed with 20.0g nitrobenzene, the freeze point drops to –0
    7·1 answer
  • How do landmasses impact the movement of air and water?
    14·1 answer
  • What type of disease is (IBS).
    10·1 answer
  • What is the name of a mixture that is easily seen and separated???
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!