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Kay [80]
3 years ago
11

Which of the following statement regarding convection is WRONG? Select one: a. Contribution due to random molecular motion reduc

es as the flow progresses in perpendicular direction from the surface b. Contribution due to advection reduces as the flow progresses in perpendicular direction from the surface c. Heat transfer is dominated by random molecular motion near the surface where fluid velocity is low d. Heat transfer occurs solely due to random molecular motion at the interface between fluid and surface where the fluid velocity is zero
Chemistry
1 answer:
Orlov [11]3 years ago
6 0

Answer: Option (d) is the correct answer.

Explanation:

Convection is defined as the process in which when heat is supplied to a fluid (liquid or gas) then denser substance (cooler) will sink at the bottom whereas less dense substance (hotter) will rise towards the top.

This intermixing of fluids leads to the generation of convection currents. This macroscopic motion of fluid particles is responsible for convection.

Also, contribution due to the random molecular motion reduces as the flow progresses in perpendicular direction from the surface. Heat transfer is dominated by random molecular motion near the surface where fluid velocity is low.

Thus, we can conclude that out of the given options wrong statement is heat transfer occurs solely due to random molecular motion at the interface between fluid and surface where the fluid velocity is zero.

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The half-life of tritium (h) is 12 years. How long does it take for 16. 0 ng of tritium to decay to the point where 2. 0 ng rema
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Answer:

36 years

Explanation:

2 =  16   *   (1/2)^n          where n is the number of half lives

2/16 = (1/2)^n

1/8 =  (1/2)^n

log (1/8)  = log (1/2^n)

log(1/8) =  n log (1/2)

log ( 1/8 ) / log(1/2) = n = 3  half lives

each half life is 12 years    so  3 * 12 = 36 years      

6 0
2 years ago
Consider the following equilibrium:
irga5000 [103]

Consider the following equilibrium:

4NH₃ (g) + 3O₂ (g) ⇄ 2N₂ (g) + 6H₂O (g) + 1531 kJ

The given statement is True, because

According to Le Ch's Principle:

Systems that have attained the state of chemical equilibrium will tend to maintain their equilibrium state.

External factors such as the addition of products and reactants result in the disruption of the equilibrium state.

we expect the system to shift to the direction that offsets the change in concentration.

This results in the state of chemical equilibrium to be reestablished.

Hence, The statement is true,

  • The addition of more ammonia (a reactant) would offset the state of equilibrium.
  • To restore chemical equilibrium, the system must consume the excess reactants to form more products.
  • A shift to favor the products side occurs.

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8 0
1 year ago
Why doesn’t the addition of an acid-base indicator affect the pH of the test solution?
elena-14-01-66 [18.8K]

The hydroxide ions keep decreasing and the hydrogen ions increase, pH decreases.

<h3>What is hydroxide?</h3>

Hydroxide is a diatomic anion with synthetic recipe OH⁻. It comprises of an oxygen and hydrogen particle kept intact by a solitary covalent bond, and conveys a negative electric charge. It is a significant yet generally minor constituent of water. It capabilities as a base, a ligand, a nucleophile, and an impetus. Hydroxide is a diatomic anion with chemical formula OH −. It consists of an oxygen and hydrogen atom held together by a single covalent bond, and carries a negative electric charge. It is an important but usually minor constituent of water. Hydroxide ions can act as a catalyst in different types of reactions. Hydroxide ions can function as base, ligand, nucleophile or a catalyst.

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7 0
2 years ago
What is the difference between endothermic and exothermic reaction (shortest answer)
max2010maxim [7]

Answer:

An exothermic process releases heat, causing the temperature of the immediate surroundings to rise. An ethothermic process absorbs heat and cools the surroundings. Hope this helped.

8 0
3 years ago
Read 2 more answers
In the laboratory, a student dilutes 13.5 mL of a 11.6 M hydroiodic acid solution to a total volume of 100.0 mL. What is the con
igomit [66]

Answer: The concentration of the diluted solution is 1.566M.

Explanation:

The dilution equation is presented as this: M_{s} V_{s} =M_{d} V_{d}.

·M= molarity (labeled as M)

·V= volume (labeled as L)

·s= stock solution (what you started with)

·d= diluted solution (what you have after)

Now that we know what each part of the formula symbolizes, we can plug in our data.

11.6M*13.5mL=M_{d} *100mL

We cannot leave it like this because the volumes must be in Liters, not milliliters. To convert this, we divide the milliliters by 1000.

13.5mL/1000=0.0135L     100mL/1000=0.1L

Now that we have the conversions, let's plug them into the equation.

11.6M*0.0135L=M_{d} *0.1L

The only thing that we need to do now is actually solving the answer.

M_{d} =\frac{11.6M*0.0135L}{0.1L}       M_{d} =1.566M

From the work shown above, the answer is 1.566M.

I hope this helps!! Pls mark brainliest :)

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1 year ago
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