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
Dmitrij [34]
3 years ago
7

Pure cement can be used as a building material in theory, but the most common application of cement is as a binder that holds ot

her materials together. Concrete is made by adding water to a mixture of cement (the binder) and sand, pebbles, and gravel (the aggregate), which cures to form a solid structure. Which reasons could explain why concrete is used to make structures rather than pure cement?
Chemistry
1 answer:
IrinaVladis [17]3 years ago
7 0
Concrete is used to make structure rather than cement, because

It is cheaper
It produces a more durable structure
It cures more quickly
You might be interested in
Is the speed of radio wave radiation higher or lower than infrared radiation
finlep [7]
<span>the speed of radio wave radiation is lower than infrared radiation</span>
5 0
3 years ago
What is this element?<br> 1s22s22p63s2<br> Magnesium<br> Aluminum<br> Potassium<br> Neon
valkas [14]

Answer:

It should be silicon... I even googled it to see if I was correct and that’s what it says so can someone figure out why silicon is not an answer

Explanation:

6 0
3 years ago
Read 2 more answers
Platinum is used to catalyze the hydrogenation of ethylene: H2(g)+CH2CH2(g)−⟶Pt(s)CH3CH3(g)H2(g)+CH2CH2(g)−⟶Pt(s)CH3CH3(g) Chlor
Dafna1 [17]

Explanation:

Homogeneous catalysis refers to catalytic reactions where the catalyst is in the same phase as the reactants.

Heterogeneous catalysis is the type of catalysis where the phase of the catalyst differs from the phase of the reactants or products.

Platinum is used to catalyze the hydrogenation of ethylene:

H2(g)+CH2CH2(g)− ⟶ Pt(s) CH3CH3(g)

In this reaction, the platinum is in the solid state. While the other species (reactants and products) are in their gaseous state.

This reaction is Heterogenous catalysis.

Chlorofluorocarbons (CFCs) catalyze the conversion of ozone (O3O3) to oxygen gas (O2O2):

2O3(g)− ⟶ CFC(g) 3O2(g)

The catalyst is in the same gaseous state as the reactant and product.

This reaction is Homogenous catalysis.

Magnesium catalyzes the disproportionation of hydrogen peroxide to produce water and oxygen:

2H2O2(aq)− ⟶ Mg(s) 2H2O(l) + O2(g)

In this reaction, the Magnesium is in the solid state. While the other species (reactants and products) are in their gaseous state.

This reaction is Heterogenous catalysis.

4 0
4 years ago
Describe the limitations of using models to represent atoms
morpeh [17]


Usually, a model is a depiction of a certain entity, never the real thing.  In times

past, many, many models look great on paper but are way off!

7 0
4 years ago
A science teacher has a supply of 20% saline solution and a supply of 50% saline solution. How much of each solution should the
lilavasa [31]

Answer:

<h2>B)</h2>

Explanation:

\text{Let}\\\\x-\text{a volume of}\ 20\%\ \text{saline solution}\\\\y-\text{a volume of }\ 50\%\ \text{saline solution}\\\\p\%=\dfrac{p}{100}\\\\20\%=\dfrac{20}{100}=\dfrac{2}{10}=0.2\\\\50\%=\dfrac{50}{100}=\dfrac{5}{10}=0.5\\\\0.2x-\text{a volume of salt in }\ 20\%\ \text{saline solution}\\0.5y-\text{a volume of salt in }\ 50\%\ \text{saline solution}\\\\60mL-\text{a volume of}\ 28\%\ \text{saline solution}\\\\28\%=\dfrac{28}{100}=0.28

0.28\cdot60mL=16.8mL-\text{a volume of salt in }\ 28\%\ \text{saline solution}\\\\\text{Equations}\\\\(1)\qquad x+y=60\\(2)\qquad0.2x+0.5y=16.8

\left\{\begin{array}{ccc}x+y=60\\0.2x+0.5y=168&\text{multiply both sides by 10}\end{array}\right\\\left\{\begin{array}{ccc}x+y=60&\text{multiply both sides by (-2)}\\2x+5y=168}\end{array}\right\\\underline{+\left\{\begin{array}{ccc}-2x-2y=-120\\2x+5y=168}\end{array}\right}\qquad\text{add both sides of the equations}\\.\qquad3y=48\qquad\text{divide both sides by 3}\\.\qquad y=16

\text{Put the value of}\ y\ \text{to the first equation:}\\\\x+16=60\qquad\text{subtract 16 from both sides}\\x=44

6 0
4 years ago
Other questions:
  • 2. The temperature of CO2 gas at 99.3 mmHg was measured at 455 K. What will be the new temperature if the
    7·1 answer
  • Consider the gas-phase reaction, Cl2(g) + Br2(g) &lt;=&gt; 2 BrCl(g), for which Kp = 32 at 500 K. If the mixture is analyzed and
    5·1 answer
  • Determine the mechanical energy of this object:
    9·2 answers
  • 17. Elements in the periodic table are arranged according to their.​
    7·1 answer
  • You wish to make a 0.299 M hydroiodic acid solution from a stock solution of 6.00 M hydroiodic acid. How much concentrated acid
    7·1 answer
  • Which lists the elements in order from most conductive to least conductive?
    6·2 answers
  • Which element is a halogen?<br><br> chlorine (Cl)<br> oxygen (O)<br> carbon (C)<br> radon (Rn)
    5·2 answers
  • Why is carbon monoxide produced when hydrocarbon fuel is burns in a car engine
    7·1 answer
  • An apple, potato, and onion all taste the same if you eat them with your nose plugged
    9·2 answers
  • A change in which property of light will have no effect on whether or not the photoelectric effect occurs?
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!