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
kap26 [50]
3 years ago
5

Does adding coefficients to a chemical equation disobey the law of definite proportions? Explain your answer.

Chemistry
1 answer:
Temka [501]3 years ago
3 0

Answer:   No

Explanation:

- Law of definite proportions is a case from the Law of conservation of energy (matter) which states that "mass can neither be created nor destroyed, but changed from one form to another."

-  Adding coefficients to a chemical equation confirms that there is the same number of atoms on both sides of a reaction; therefore, matter has not been created or destroyed but reorganized to give new substrates.

Example :             2 Mg + O2 → 2 MgO              

In the balanced equation above, 2 moles of Mg reacts with 1 mole of O2 to produce 2 moles of MgO.

mass of 2 moles of Mg  = 24×2= 48 grams

mass of 1 mole of O2 = 16+16 = 32 grams

total mass of reactants = 48 + 32 = 80 grams


mass of 2 moles of MgO = (24+16) ×2 = 80 grams  

total mass of products = 80 grams

It is clear that the number of grams of matter before and after the reaction is the same and  equals to 80 grams, so obeys the law of definite proportions..


You might be interested in
What is concentration in science​
alexandr1967 [171]

The amount of something that you have in a liquid (most commonly)

7 0
3 years ago
Read 2 more answers
2 HI(g) ⇄ H2(g) + I2(g) Kc = 0.0156 at 400ºC 0.550 moles of HI are placed in a 2.00 L container and the system is allowed to rea
Alex_Xolod [135]

<u>Answer:</u> The concentration of hydrogen gas at equilibrium is 0.0275 M

<u>Explanation:</u>

Molarity is calculated by using the equation:

\text{Molarity}=\frac{\text{Number of moles}}{\text{Volume of solution (in L)}}

Moles of HI = 0.550 moles

Volume of container = 2.00 L

\text{Initial concentration of HI}=\frac{0.550}{2}=0.275M

For the given chemical equation:

                          2HI(g)\rightleftharpoons H_2(g)+I_2(g)

<u>Initial:</u>                  0.275

<u>At eqllm:</u>           0.275-2x      x         x

The expression of K_c for above equation follows:

K_c=\frac{[H_2][I_2]}{[HI]^2}

We are given:

K_c=0.0156

Putting values in above expression, we get:

0.0156=\frac{x\times x}{(0.275-2x)^2}\\\\x=-0.0458,0.0275

Neglecting the negative value of 'x' because concentration cannot be negative

So, equilibrium concentration of hydrogen gas = x = 0.0275 M

Hence, the concentration of hydrogen gas at equilibrium is 0.0275 M

4 0
3 years ago
Asap worth 20 points
Olegator [25]
You forgot to attach the question…
5 0
2 years ago
The abbreviation for refrigerants containing chlorine fluorine carbon and hydrogen is
slega [8]
<span>The answer is CFCs. The abbreviation stands for Chlorofluorocarbons. They are made by fully halogenating paraffin hydrocarbon. These compounds are known to cause climate change damaging the ozone layer. It is, therefore, advisable to properly dispose off of refrigerators, solvents and propellants</span>




5 0
3 years ago
Over long time scales the solubility-temperature feedback (below), can affect climate. An increase in atmospheric CO2 concentrat
Mars2501 [29]

The fact that CO2 is released from oceans due to further rise in temperature is an example of a negative feedback.

A negative feedback is one in which the process that produces the feedback is interrupted. That is, the process is stopped as a result of the feedback received.

In this case, CO2  which leads to global warming dissolves in the ocean which serves a large sink for the gas. However, as the increase in ocean temperatures causes decrease in solubility of CO2, more CO2 is released leading to further temperature rise. This is an example of a negative feedback loop.

Learn more: brainly.com/question/13440572

5 0
2 years ago
Other questions:
  • The ΔG°f of atomic oxygen is 230.1 kJ/mol. Find ΔG° for the following dissociation reactionO2 (g) &lt;--&gt; 2O (g)then calculat
    12·1 answer
  • Which part of the water cycle would follow step C in the diagram shown?
    14·1 answer
  • A 10.0 g sample of propane, C3H8, was combusted in a constant-volume bomb calorimeter. The total heat capacity of the bomb calor
    11·1 answer
  • What’s the difference between the three scales used to measure seismic waves
    10·1 answer
  • Which best describes the effect of J. J. Thomson’s discovery?
    14·1 answer
  • If the evidence you collect during experiments does not support your hypothesis, what should happen to that hypothesis.
    15·1 answer
  • Can someone please explain me the difference between physical changes and physical properties and of chemical changes and chemic
    15·1 answer
  • What is the distinction between the caus and the manner of death
    10·1 answer
  • Examples of the skills used in science include _____ and _____.
    9·1 answer
  • A student combines a clear, dark blue solution with a clear, colorless solution and agitates the test tube. The combination resu
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!