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
pychu [463]
4 years ago
5

Why do most sidewalks have cracks in them every few feet?

Chemistry
2 answers:
Licemer1 [7]4 years ago
8 0
This is actually a really good question! The lines are actually called "contraction joints." When the sidewalk is being made, the concrete used shrinks as it dries. This shrinking can cause cracks to form in the sidewalk, so to prevent the cracks from forming randomly, the builders make thin lines. Any cracks that form should follow the path of the line, since this is where the concrete is thinnest.

Hope this helps! :)
Elodia [21]4 years ago
7 0
It's because of the landscape, it changes over time.
You might be interested in
Variable changed by the scientists what is being tested
Gnoma [55]

Answer:

Hope this is helpful to you!

The independent variable is the one that is changed by the scientist. To insure a fair test, a good experiment has only ONE independent variable. As the scientist changes the independent variable, he or she records the data that they collect.

6 0
3 years ago
Read 2 more answers
Look at the periodic table.
zhuklara [117]

Answer:

Mg^{+2}

Explanation:

The oxidation state of S is (-2) and that of Mg is (+2) since Mg loses two electrons to S

5 0
3 years ago
Cis-platin is a chlorine-containing chemotherapy agent with the formula pt(nh3)2cl2. What is the mass of one mole of cis-platin?
marishachu [46]

Cis-platin is a chemotherapy agent used to treat and kill cancerous cells in patients. One mole of cis-platin has a mass of 300.06 grams/mol. Thus, option B is correct.

<h3>What is a chemotherapy agent?</h3>

A chemotherapy agent is an alkylating agent that is used to treat cancer and is given to reduce the infection or to relieve the symptoms. Cis-platin (Pt(NH₃)₂Cl₂) is one of the chemotherapy agents that treat lung, ovarian, and neck cancer, etc.

The mass of one mole of Cis-platin is calculated as,

Moles = mass ÷ molar mass

Where,

Moles = 1 mole

The molar mass of (Pt(NH₃)₂Cl₂) is calculated as,

195.06 g/mole + 2(17g/mole) + (35.5)2 = 300.06 grams

Substituting values to calculate mass:

Mass = Molar mass × moles

= 300. 06  × 1

= 300.06 grams/mol

Therefore, option B. 300.06 gm/mol is the mass of Cis-platin.

Learn more about chemotherapy agents here:

brainly.com/question/14260402

#SPJ4

Your question is incomplete, but most probably your full question was, Cis-platin is a chlorine-containing chemotherapy agent with the formula pt(nh3)2cl2. What is the mass of one mole of cis-platin?

  • 488.91 g/mol
  • 300.06 g/mol
  • 492.37 g/mol
  • 283.02 g/mol
  • 2860.5 g/mol
8 0
2 years ago
At the beginning of the experiment, the aspirin pill contains 325 mg of acetylsalicylic acid and weighs 400 mg. at the end of ex
Feliz [49]

That would be (110/ 325)  * 100

= 33.85 %

8 0
3 years ago
Which of these compounds would you expect
Veseljchak [2.6K]
ClBr, two nonmetals





Hope this helps you
6 0
2 years ago
Other questions:
  • When a clean iron nail is placed in an aqueous solution of copper(ii) sulfate, the nail becomes coated with a brownish black mat
    5·1 answer
  • Which of the following is not have kinetic energy
    7·1 answer
  • Pls help me out!! lol
    14·1 answer
  • Are single called bacteria
    5·2 answers
  • What is the best name for this molecule? Explain your naming process.
    6·1 answer
  • Choose all the answers that apply.
    8·2 answers
  • How much more acidic is a person’s blood if it has a pH of 7.3 compared to its preferred 7.4? How much more alkaline is a person
    15·1 answer
  • In a 1.0×10−6 M solution of KOH(aq) at 25 °C, arrange the species by their relative molar amounts in solution.
    6·1 answer
  • The endomembrane system and ribosomes work together to perform what function?
    6·2 answers
  • Beta particles are identical to Multiple Choice protons. helium atoms. hydrogen atoms. helium nuclei.
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!