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Related Questions
16. Matching.
Answer the questions about this reaction:
Mg(s) + HCI- MgCl₂(aq) + H₂(g)
Write the oxidation and reduction half-reactions:
Oxidation half-reaction:
Reduction half-reaction:
Based on the table of relative strengths of oxidizing and reducing agents (B-18), would these reactants form these products?
Write the balanced equation:
Answers
The products would be formed by these reactants. Because Mg is a more powerful reducing agent than H₂, it can reduce H⁺ ions to form H₂ gas.
What is oxidized in Mg + 2HCl → MgCl2 + H2?Because it oxidizes magnesium to magnesium cations while being reduced, hydrochloric acid, the compound that delivers hydrogen ions to the reaction, acts as an oxidation agent.
What is the distinction between oxidation and reduction half-reactions?When a reactant loses electrons during the reaction, this is referred to as oxidation. When a reactant gains electrons during the reaction, this is referred to as reduction. This is common when metals react with acid.
What exactly is a half reaction?A half reaction is the component of a redox reaction that is either the oxidation or reduction reaction. By taking into account the change in oxidation states of the individual substances involved in the redox reaction, a half reaction is obtained.
Oxidation half-reaction: Mg(s) → Mg²⁺(aq) + 2e⁻
Reduction half-reaction: 2H⁺(aq) + 2e⁻ → H₂(g)
The balanced equation is:
Mg(s) + 2HCl(aq) → MgCl₂(aq) + H₂(g)
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what is possible mass number of a sodium atom, Na?
Answers
Answer:
The possible mass of the number of sodium is 23amu
2H2O -> 2H2 + O2
How many moles of Hy are produced from 72.16 g of H2O?
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Answer:
4moles
Explanation:
2moles produces 2moles of H2
then 4moles (72g) produces 8 grams H2
For this question, choose THREE answers. A student adds two chemicals together in lab and observes a succe
ssful reaction. Which of the following can be assumed about the reactants they used?
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Answer is Answer
Explanation:
The three correct answers about the reactants they used for a successful reaction are:
They successfully collided with each other.They had the minimum activation energy.They were oriented in the correct direction.What is the collision theory?The collision theory states that successful chemical reactions occur when reactant particles collide with each other with sufficient energy and proper orientation.
Based on the collision theory, for a successful reaction to occur, the reactants must collide with each other with sufficient energy (activation energy) and in the correct orientation.
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Complete question:
For this question, choose THREE answers. A student adds two chemicals together in lab and observes a successful reaction. Which of the following can be assumed about the reactants they used?
They had the minimum activation energy.
They did not have the minimum activation energy.
They were not oriented in the correct direction.
They were oriented in the correct direction.
They did not successfully collide with each other.
They successfully collided with each other.
Electrons help create bonds between elements as they lie on the outside of an
atom.
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Define matrer?
a)Electrical conductivity
b)Anything that takes Iness and space
c) Something that doesn't take up space.
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Answer:
if you are asking matter then
Explanation:
Matter is defined as anything that has mass and takes up space (it has volume).
If 0.25 moles of H2O are produced, then how many moles of oxygen gas were consumed?
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Answer:
it doesn't the molces stay the same
Explanation:
Define exothermic and endothermic. What are the mathematical signs of the internal energy and enthalpy when a process is exothermic?
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Exothermic refers to chemical interactions that aerobic respiration. Combustion reactions release higher energy. Endothermic refers to atoms and molecules that either use or absorb reactive power.
What is an exothermic explanation?A chemical process known as an endothermic releases energy as heat or light. It is an endothermic reaction's opposite. Chemical equation expressed as reactants + products + energy. An reaction mechanism is one in which electricity is given off as light or warmth.
Exothermic example: What is it?A response is deemed to be exothermic if it produces heat while also undergoing a net decrease in basic enthalpy change. Samples include those type of combustion, iron rust, including water froze. Exothermic processes are those that discharge heat and energy into the surroundings.
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Calculate the ratio of the moles of produced to the moles of each of the reactants used. (Write two separate ratios.)
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Ratio of moles of NH₃ produced to moles of N₂ used: 2 moles of NH₃ / 1 mole of N₂
Ratio of moles of NH₃ produced to moles of H₂ used: 2 moles of NH₃ / 3 moles of H₂
What is the mole ratio of the reaction?From the balanced chemical equation:
N₂ + 3 H₂ ⟶ 2 NH₃
We can determine the ratio of moles of products to the moles of each reactant.
Ratio of moles of NH₃ produced to moles of N₂ used:
From the balanced equation, we can see that 1 mole of N₂ reacts to produce 2 moles of NH₃. Therefore, the ratio is:
2 moles of NH₃ / 1 mole of N₂
Ratio of moles of NH₃ produced to moles of H₂ used:
From the balanced equation, we can see that 3 moles of H₂ react to produce 2 moles of NH₃. Therefore, the ratio is:
2 moles of NH₃ / 3 moles of H₂
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Given the equation of reaction;
N₂ + 3 H₂ ---> 2 NH₃
Calculate the ratio of the moles of produced to the moles of each of the reactants used. (Write two separate ratios.)
4.3 moles of Ra(OH)2 to grams
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Ra(OH)2 = 260.0 g/mol
Now use this rule
n= m/M
m= nM = ( 4.3 mole)(260g/mol)
= 1118 g
Now sig fig
1100 g
Which aqueous solution below is the most acidic?
A.) 11.5 B.) 9.2 C.) 6.7 D.) 2.5
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HI is the aqueous solution which is the most acidic. Any aqueous solution in chemistry can be divided into one of three groups, including neutral, basic, or acidic solutions.
Any aqueous solution in chemistry can be divided into one of three groups, including neutral, basic, or acidic solutions. Any aqueous solution with a pH 7.0 ([H+] > 1.0 x 10-7 M) is considered an acidic solution.
Water serves as the solvent in an aqueous solution. Solutions that are acidic are sour, whereas alkaline solutions are soapy, thus it's rarely a good idea to try an unfamiliar solution. HI is the aqueous solution which is the most acidic.
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What is the electron configuration for magnesium (Mg)?
O A. 1s²2s²2p²356
B. 15²25²3s23p6
C. 3s²3p 3d
D. 1s²2s²2p63s²
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Answer:
D is correct.(1s22s22p63s2)
2 examples of metal’s catalytic reaction
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Answer:
Example 1
palladium(II) nitrate,
Example 2
Metal catalysts such as Fe, Ni, Mo, and Co are routinely used in the manufacture of CNMs.
Explanation
The three metals used in catalytic converters — rhodium, platinum and palladium — are part of a category known as platinum group metals, or PGMs, which are known for their catalytic properties.
Neuroscientist have found we have between 500 to 700 thoughts per day true or false 
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What is meant by the rate of a reaction? O A. How much energy the reaction requires B. How slow or fast a reaction progresses c. How far to completion the reaction goes D. How concentrated the final products are
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The rate of a reaction refers to how fast or slow a reaction progresses over time. Option B is correct.
It is a measure of the change in concentration of reactants or products per unit of time. The rate of a reaction can be expressed in different units, such as moles per liter per second or grams per second. Factors that can affect the rate of a reaction include the concentrations of the reactants, the temperature, the presence of a catalyst, and the surface area of the reactants.
The rate law equation, which expresses the dependence of the reaction rate on the concentrations of the reactants, can also be used to determine the rate of a reaction under different conditions. The rate of a reaction is important for many applications, such as designing chemical reactions for industrial processes, optimizing reaction conditions in laboratories, and understanding biological processes that involve chemical reactions. Option B is correct.
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The struggle among organism for food, water and other needs is called what
A. Food chain
B. Food web
C. Competition
D. Predator
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Answer: C.)competition.
Explanation: the struggle between organisms for food, water, and other needs.
Example: When two prides(lions group) both need food they will fight each other for it.(Cra*p example xD)
~ItsOniiSama ❤
Hope this helps
characteristics. of. rusting
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Answer: metal turn orange and weaker as it gets oxidised
Explanation:
Are two atoms of the same element identical?
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Answer: No, two atoms belonging to the same chemical element are not necessarily identical.
Explanation:
I hope that was helpful
In the winter, a heated home in the Northeast might be maintained at a temperature of 67 °F. What is this
temperature on the Celsius and Kelvin scales?
(Round your answer to the nearest whole number.)
°C
K
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Kelvin: 292.59
Researchers investigated the influence of environmental pH on the activity of peroxidase, an enzyme that catalyzes the conversion of hydrogen peroxide to water and oxygen gas. In an experiment, the researchers added a hydrogen peroxide solution containing guaiacol to several identical test tubes and adjusted the solution in each test tube to a different pH . The researchers included the guaiacol because it caused the solutions to change color as the reactions proceeded, which the researchers relied on for measuring reaction rates. Finally, the researchers added the same amount of peroxidase to each test tube and measured the rate of each reaction at 23°C . The results of the experiment are represented in Figure 1.
Based on Figure 1, which of the following statements best predicts the effect that a change from a moderately acidic environment ( pH near 6) to a basic environment will have on peroxidase activity?
answer choices
Peroxidase activity will decrease.
Peroxidase activity will increase.
Peroxidase activity will stay the same.
Peroxidase activity will increase at first and then decrease.
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From the given graph, if we change from a moderately acidic environment ( pH near 6) to a basic environment, the peroxidase activity will decrease. Therefore, option (A) is correct.
What is pH?pH can be described as the negative logarithm of hydrogen ion (H⁺) concentration. Mathematically, pH is generally inversely proportional to the concentration of hydrogen ions (H⁺).
pH = -log ([H⁺])
In chemistry, pH is a scale used to determine the acidity or basicity of an aqueous solution. Acidic solutions are calculated to have lower pH values than basic or alkaline solutions.
The pH scale possesses ranges from 0 to 14 while pH 7.0 is neutral. A low pH (about 1 or 2) is acidic and a high pH (12 or 14) is basic.
When we change the moderately acidic environment to a basic environment. We actually increase the pH value in the graph showing the peroxidase activity decreases when pH increases more than 6.
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In the following reaction, what element is gaining mass?
Mg(s) + CuSO4(aq) -> MgSO4(aq) + Cu(s)
A. Mg
B. None of these
C. Cu
D. O
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Mg gained mass because it went from being a single element (on the reactant side) to being a molecule (on the product side).
Mg element is gaining mass. Hence, option A is correct.
What is a chemical equation?A chemical reaction is a representation of symbols of the elements to indicate the number of substances and moles of reactant and product.
Mg gained mass because it went from being a single element (on the reactant side) to being a molecule (on the product side).
Hence, option A is correct.
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which 2 criteria are the most important of engineers to consider when developing a procsses to produce
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Two key criteria that engineers must prioritize are efficiency and safety. By emphasizing efficiency and safety during process development, engineers can create robust and reliable processes that not only maximize productivity but also prioritize the well-being of personnel and the environment.
When developing a process, engineers need to consider several important criteria. Two key criteria that engineers must prioritize are efficiency and safety.
Efficiency is crucial in process development to ensure optimal use of resources, time, and energy. Engineers strive to design processes that maximize productivity, minimize waste, and reduce costs. This involves optimizing reaction conditions, streamlining workflow, and implementing automation where possible. Efficiency considerations also extend to energy consumption, raw material utilization, and overall process sustainability.
Safety is another critical aspect that engineers must prioritize. They need to identify and mitigate potential hazards associated with the process, ensuring the safety of both personnel and the environment. This involves conducting thorough risk assessments, implementing safety protocols, and designing equipment and systems with safety features. Engineers must also consider the safe handling and storage of materials, as well as potential risks during transportation and disposal.
By emphasizing efficiency and safety during process development, engineers can create robust and reliable processes that not only maximize productivity but also prioritize the well-being of personnel and the environment.
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when electric current is applied externally, which of the following produces a redox reaction: A wood. B. electrolytic C. Solid
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Answer:
the answer is a
Explanation:
Pewter is a solidified solution of tin and lead or tin and zinc. In both cases, tin is the main component. Which metal would you classify as the solute in each type of pewter?
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i don’t know how to set up it up, pls help with explanation!!!! im very lost
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The answer is d. 2
Put the value in 'n' and determine the molar mass. It will match with what is given in question,i.e., 46.00 g/mol.
how many grams were dissolved to make 2.0 L of a 0.4 M KNO3 solution
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Answer:80.8g
Explanation:
= . / ()
The irreversible isomerization A
B was carried out in a batch reactor and the following concentration time data were obtained:
Time vs Concentration data in a Batch reactor
t 0 3 5 8 10 12 15 7.5
mol/h 4 2.89 2.25 1.45 1.0 0.65 0.25 0.07
Determine the reaction order,
, and the specific reaction a rate constant, k, using any method of your choice.
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The reaction order and specific reaction rate constant can be determined by performing the kinetics experiment on irreversible polymerization A. Kinetic experiments can be used to investigate the rate and mechanism of chemical reactions. Chemical kinetics is the study of chemical reactions' speed and pathway.
The term "kinetics" refers to the study of reaction rates, which are determined by measuring the concentration of reactants and products as a function of time.Kinetics experiments can be used to determine the reaction rate and order of reaction. A chemical reaction's rate is defined as the change in the concentration of a reactant or product per unit time. The order of a reaction refers to the number of molecules that must react to produce a product. The order of reaction can be determined by measuring the initial rate of the reaction as a function of concentration.Methods for determining the reaction rate order include the initial rate method, the half-life method, and the integrated rate method. The initial rate method determines the reaction order by measuring the initial rate of the reaction at different reactant concentrations. The half-life method determines the reaction order by measuring the time it takes for the reactant concentration to decrease by half.The integrated rate method determines the reaction order by measuring the concentration of the reactant or product at different times.The specific rate constant can be determined by using the Arrhenius equation, which relates the rate constant to the activation energy, temperature, and frequency factor. The frequency factor can be determined by measuring the rate constant at different temperatures.For such more question on polymerization
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A biology class wanted to study the effect of different materials on the melting rate of ice. They placed pieces of ice, each with a mass of 10g, onto trays. Group 1 was covered in plastic, group 2 was covered in paper, group 3 was covered in aluminum, and group 4 remained uncovered.
Each piece of ice was allowed to melt for 15 minutes. Then final mass of the ice, minus the melted water, was recorded at the end of the experiment.
What is the independent variable in this experiment?
Choose 1 answer:
Choose 1 answer:
(Choice A)
A
The type of covering material
(Choice B)
B
The amount of melting time
(Choice C)
C
The starting mass of the ice
(Choice D)
D
The final mass of the ice
Answers
The Independent variable in the experiment is the type of covering material.
What is an experiment?An experiment is the only way by which we are able to decode cause and effect relationships. Since science is empirical, every tentative explanation if a phenomenon is subjected to controlled tests. These controlled tests are what we call an experiment. There must be an independent variable and there must be dependent variable. The independent variable is the variable that is manipulated in the experiment while the dependent variable is the variable that changes as we manipulate the independendent variable.
Now, if we look at the experiment, we can see that we are manipulating the type of covering in order to determine the impact that it has on the time that it taking for cooling to occur.
Hence the Independent variable in the experiment is the type of covering material. The type of the covering was being changed and then the impact of the change of the covering material on the cooling time is studied.
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Please i really need help it's due today
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Answer:
there is your answer hope it helped :3
what is the litosphere made of
Answers
Answer:
brittle crust and top is made of upper mantel