When 50. milliliters of an HNO3 solution isexactly neutralized by 150 milliliters of a 0.50 M
solution of KOH, what is the concentration of
HNO3?
(1) 1.0 M (3) 3.0 M
(2) 1.5 M (4) 0.5 M
Answers
Answer : The correct option is, (2) 1.5 M
solution :
According to the neutralization law,
where,
= molarity of
solution = ?
= volume of
solution = 50 ml
= molarity of KOH solution = 0.50 M
= volume of KOH solution = 150 ml
Now put all the given values in the above law, we get the volume of solution.
Therefore, the concentration of is, 1.5 M
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(2) a decrease in activation energy and an increase in the reaction rate
(3) an increase in activation energy and a decrease in the reaction rate
(4) an increase in activation energy
Answers
Answer: Option (2) is the correct answer.
Explanation:
Activation energy is the minimum amount of energy required to start or initiate a chemical reaction.
Whereas a catalyst helps in increasing the energy of reactant molecules so that they can overcome activation energy barrier and actively participate in the reaction.
Hence, adding a catalyst to a chemical reaction results in a decrease in activation energy and an increase in the reaction rate.
Adding a catalyst to a chemical reaction results in a decrease in activation energy and an increase in the reaction rate, as catalysts speed up chemical reactions by lowering the required activation energy. The correct answer to the given question is option (2) a decrease in activation energy and an increase in the reaction rate
In the world of Chemistry, a catalyst is a substance that increases the speed of a chemical reaction without itself undergoing any permanent chemical change. It achieves this acceleration by lowering the activation energy required for the reaction to occur. Therefore, adding a catalyst to a chemical reaction results in a decrease in activation energy and an increase in the reaction rate (option 2).
The activation energy is the minimum amount o f energy required for a chemical reaction to proceed. By lowering this energy barrier, a catalyst allows the reaction to proceed more quickly, in other words, it increases the rate of the reaction.
The correct answer to the given question is option (2) a decrease in activation energy and an increase in the reaction rate
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Answers
Answer:
C6H12O6 + 6O2 -> 6CO2 + 6H2O + 38ATP
Explanation:
glucose + oxygen gas -> carbon dioxide + water + ATP
Answer:
C 6 H 12 O 6 + 6 O 2 --> 6 CO 2 + 6 H 2 O + ATP is the complete balanced chemical formula for cellular respiration.
Answers
Answer:
Theoretical yield = 31.8 g
Explanation:
The formula for the calculation of moles is shown below:
For
Mass of = 60.0 g
Molar mass of = 101.96128 g/mol
The formula for the calculation of moles is shown below:
Thus,
Given: For
Given mass = 30.0 g
Molar mass of = 12.0107 g/mol
The formula for the calculation of moles is shown below:
Thus,
According to the given reaction:
1 mole of aluminium oxide react with 3 moles of carbon
0.5885 mole of aluminium oxide react with moles of carbon
Moles of carbon = 1.7655 moles
Available moles of carbon = 2.4978 moles
Limiting reagent is the one which is present in small amount. Thus, aluminium oxide is limiting reagent.
The formation of the product is governed by the limiting reagent. So,
1 mole of aluminium oxide on reaction forms 2 moles of aluminium.
0.5885 mole of aluminium oxide on reaction forms moles of aluminium.
Moles of aluminium = 1.177 moles
Molar mass of aluminium = 26.981539 g/mol
Mass of sodium sulfate = Moles × Molar mass = 1.177 × 26.981539 g = 31.8 g
Theoretical yield = 31.8 g
Answers
1) The Universal gravitaional law, stated by Sir. Isaac Newton, states that the force of gravitational attraction between two objects is directly proportional to the product of their masses and inverse to the square of the distance that separates their centers.
2) Mathematically, it was expressed in this form:
F = G × m₁ × m₂ / d².
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3) Then, the answer is that the greatest for of gravitaional attraction is:
- that of the two objects for which the product of the masses is the greates (assumin same distance between them), or
- that of the two objects that are closer (assuming the product of the masses is the same).
Those requirements are met perfectly by a black hole.
Answers
Answer:
Explanation:
Catalysis is a process that accelerates chemical reactions due to molecules called catalysts, which provide ways to reach products that require less energy.
A catalyst intervenes in the reaction mechanism, but is not consumed. This means that the catalyst participates in some stage of the reaction, but then regenerates.
In addition, a catalyst is used in a small amount: a minimum mole percentage, with respect to reagents, is usually required to observe an increase in velocity.
There are three types of catalysis:
- Homogeneous: the catalyst is present in the same phase as the species that react.
- Heterogeneous: the catalyst and reagents are in a different phase.
- Enzyme: occurs only in living beings, and in these cases the catalysts are enzymes.
The absence of a catalyst can make the reaction so slow that it never occurs. Therefore, when the catalyst of a reaction is removed, the reaction may stop.
Answers
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The solar system is comprised of 9 planets with the nearest to the sun being mercury, and the farthest being Pluto. Earth is arranged as the third planet from the distance from the sun and is located between Venus and Mars.
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