Answer : Option A) 24.0 g
Explanation : From the given choices the correct measurement using the full precision available for this balance will be 24.0 g as precision shows how close all of taken measurements are to each other. Therefore, measurements can have precision but not very close accuracy. Hence, 24.0 g confirms the criteria of being the most precise measurement amongst the given options. It will depend on how many times you weigh the same product and get the same value. This will decide the precision.
The chemical equilibrium can take place in a close system and can not be affected by catalyst and is a reversible reaction.
The term "chemical equilibrium" describes a situation in which a chemical reaction's forward reaction rate and reverse reaction rate are equal. In other words, throughout time, the reactant and product concentrations in the reaction mixture do not change. Even if the individual reactions may still be in progress, there is no net change in the reactant or product concentrations at the point of chemical equilibrium. This occurs as a result of the equalisation of the rates at which molecules react to create products and molecules disintegrate into reactants. Even though the reaction is still taking place at the molecular level, the system is in equilibrium and it appears to have stopped.
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B. nuclear separation.
C. nuclear fission.
D. nuclear fusion.
Answer is: C. nuclear fission.
Nuclear fission is a nuclear reaction or a radioactive decay where nucleus of atom split into smaller ligher nuclei.
Nuclear fission is exothermic reaction which release large amounts of energy (electromagnetic radiation or as kinetic energy, which heat reactors where fission reaction take place).
Answer: The process of splitting of an atom into two lighter atoms is called is called nuclear fission.
Explanation:
There are two types of nuclear decay reactions:
Hence, the process of splitting of an atom into two lighter atoms is called is called nuclear fission.
Answer:
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Explanation:
Which equation represents the oxidation half reaction?
(1) Zn(s) + 2e– → Zn2+(aq)
(2) Zn(s) → Zn2+(aq) + 2e–
(3) Cu2+(aq) → Cu(s) + 2e–
(4) Cu2+(aq) + 2e– → Cu(s)
Answer: Option (2) is the correct answer.
Explanation:
Oxidation is the process in which there is loss of electrons or increase in oxidation number of the element.
Whereas reduction is the process in which there is gain of electrons or decrease in oxidation number of the element.
For example,
Oxidation-half reaction:
Reduction-half reaction:
Thus, we can conclude that the given equation Zn(s) → Zn2+(aq) + 2e– represents the oxidation half reaction.
The equation that represents the oxidation half reaction is Zn(s) → Zn2+(aq) + 2e–
Oxidation reaction is the process in which there is loss of electrons or increase in oxidation number of the element.
From all the given half reaction, there is only one reaction with increase in oxidation number;
Zn(s) → Zn2+(aq) + 2e–
Thus, there is increase in oxidation number of 0 to + 2.
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To produce 100.0 L of NH3 at STP, 62.4 grams of N2 are required.
The balanced equation for the reaction is:
N2(g) + 3H2(g) → 2NH3(g)
According to the balanced equation, one mole of N2 reacts with three moles of H2 to produce two moles of NH3. From this information, we can use stoichiometry to determine the mass of N2 required to produce 100.0 L of NH3 at STP.
First, we need to convert liters of NH3 to moles using the ideal gas law and the molar volume of a gas at STP (~22.4 L/mol). Once we have the moles of NH3, we can use the mole ratio from the balanced equation to calculate the moles of N2. Finally, we can use the molar mass of N2 to convert moles to grams.
Let's calculate:
Therefore, 62.4 grams of N2 are required to produce 100.0 liters of NH3 at STP.
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Moles are the base unit of atoms, molecules, ions, or any other substance. It is exactly 6.022 × 10²³ entities of any substance. The mole is equal to the ratio of the given mass to the molar mass.
Given that:
Magnesium atoms =
1 mole of a substance =
Now, calculating the moles of magnesium in the given entity:
Mole =
Mole = 0.05 moles.
Thus, the moles are defined as the base unit of any substance. It was discovered by the scientist Avogadro and is also known as Avogadro's number ().
Therefore, the mole in atoms of Magnesium will be 0.05.
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