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
algol [13]
3 years ago
10

Why are salt solutions not used to treat the roads during snow events when the temperature is below -15 degrees Celsius? *

Chemistry
1 answer:
Marta_Voda [28]3 years ago
3 0

Answer:

i think thats c

Explanation:

You might be interested in
An endergonic reaction with a Δh and Δs can be changed into an exergonic reaction.
zheka24 [161]

Full question:

This question is incomplete, here it is completed:

An endergonic reaction with a ______ ∆H and a ______ ∆S can be changed into an exergonic reaction by decreasing the temperature.

Option A: negative, positive

Option B: negative, negative

Option C: positive, positive

Option D: positive, negative

Answer:

Option B: negative, negative

Explanation:

The change in free energy (ΔG) of a system for a constant-temperature process is

ΔG = ΔH - TΔS

free energy is the energy available to do work. Thus, if a particular reaction is accompanied by a release of usable energy (that is, <u>ΔG is negative</u><u>), it is said to be</u><u> exergonic</u>. On the other hand, if a reaction consumes energy (that is, <u>ΔG is positive</u><u>), it is said to be </u><u>endergonic</u>.

Looking at the equation, we can see that if ΔH is negative and ΔS is negative, then ΔG will be negative only when TΔS  is smaller in magnitude than ΔH. This condition is met when T is small.

ΔG = ΔH - TΔS

           -        -

This means that the reaction proceeds spontaneously at low temperatures. At high temperatures, the reverse reaction becomes spontaneous. An example of that would be the following reaction:

NH₃(g) + HCl(g) → NH₄Cl(s)

4 0
3 years ago
28.7 l of propane, c3h8, are consumed in a combustion reaction. how many grams of water are produced?
lora16 [44]
The chemical reaction would be:

C3H8 + 5O2 = 3CO2 + 4H2O

For this case, we assume that gas is ideal thus in every 1 mol the volume would be 22.41 L. We calculate as follows:

28.7 L C3H8 ( 1 mol / 22.41 L ) ( 4 mol H2O / 1 mol C3H8 ) ( 18.02 g / mol ) = 92.31 g H2O produced

Hope this answers the question.
7 0
3 years ago
. How many grams of NaOH would you need to make 450 mL of a 0.250 M NaOH solution
Stella [2.4K]
You have molarity and you have volume. Use the formula :
Molarity(M)= Moles(N)/Liter(L)            to get the solution. 
450 ml= .450 L
.250 = N/.450
N=.1125 moles of NaOH.
 And since you know the moles, use the molar mass to figure out the grams.
<span> (40g/mol NaOH) x (.1125 mol) =  
4.5g of NaOH.
</span>
Hope it helps. Good luck on chemistry.
7 0
3 years ago
Burning coal produces which type of gas?
vovikov84 [41]

Answer:

carbon dioxide

Explanation:

carbon dioxide is the primary greenhouse gas produced by burning fossil fuels like coal and oil

5 0
3 years ago
Read 2 more answers
A local farmer notices that the level of water in the pond behind his house has been going down. Temperatures have been very hig
nikitadnepr [17]

EVAPORATION OR THE ANIMALS ARE DRINKING THE WATER BECAUSE IT IS HOT

6 0
3 years ago
Other questions:
  • Convert 2.34x10^5 ms to cs
    13·1 answer
  • Convert mass to moles for both reactants. (Round to 2 significant figures.)
    13·2 answers
  • Consider the following reaction: 2 H2(g) + 2 NO(g) → 2 H2O(g) + N2(g) If the concentration of NO changed from 0.100 M to 0.025 M
    14·1 answer
  • All the molecules of a substance possess the "average kinetic energy" value.
    12·1 answer
  • How do you balance Na + MgF{2} Na + Mg?
    6·1 answer
  • Both pyrrole and pyridine are aromatic compounds, and undergo electrophilic aromatic substitution (EAS). Using a resonance argum
    11·1 answer
  • Explain how water might have two different densities​
    10·1 answer
  • Question 9(Multiple Choice Worth 1 points)
    10·2 answers
  • What are easy ways to<br>Study Chemistry ??​
    11·1 answer
  • Read image for instructions A heterogeneous mixture B moleculeC liquid D homogeneous mixture
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!