Complete and balance the following half-reaction in acidic solution. Be sure to include the proper phases for all species within the reaction. MnO4 (aq) → MnO2(s) 4- 13 3- 12 2+ 13+ 4+ ] 2. 1 ] 4 1. 5 6 7 8 o 1 02 ó 3 . O 06 U O: O, 8 0. _ 10 + ( ) 11 (s) (1) D (g) (aq) H e- H+ H3O+ Mn OH H20

Answer:

one valence electron

Lithium has a single electron in the second principal energy level and so we say that lithium has one valence electron. Beryllium has two valence electrons.

- Lumen Learning

Answer:

one

Explanation:

because lithium is the third element with a total of 3 electrons.

ANSWER

Temperature will remain the same

EXPLANATION

When water reaches it boiling point at 100 degrees Celcius, the molecules of water will start moving independently and collide with each other.

At 100 degrees Celcius, it has attained an equilibrium between the liquid and vapor phase. Therefore, when energy is added to it, the temperature will remain the same and there will be a phase change.

Hence, the temperature will remain the same.

To solve this we must know the concept of chemical reaction. The correct option is option D that is forming or breaking of bonds.  There are so many types of chemical reaction reaction like combination reaction, double displacement reaction.

Chemical reaction is a process in which two or more than two molecules collide in right orientation and energy to form a new chemical compound. The mass of the overall reaction should be conserved.

Chemical reaction is a reaction in which the breaking of old bond from the reactant take place while on the product side, formation of new bond take place to form product.

Therefore, the correct option is option D that is Forming or breaking of bonds take place during chemical reaction.

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Answer:

here are the answers edge2020

Explanation:

Answer:

Here is 2/5 and the next slide answers too!

Explanation:

Hope it helps!!

The molarity of the base used in the experiment, which was determined based on the recovered NaCl and the volumes of hydrochloric acid and sodium hydroxide, was approximately 1.15 M.

To determine the molarity of the base used in the experiment, we need to use the stoichiometry of the balanced chemical equation and the given data.

The balanced chemical equation for the reaction between hydrochloric acid (HCl) and sodium hydroxide (NaOH) is:

HCl + NaOH → NaCl + H2O

First, we need to find the number of moles of NaCl produced. We can do this by using the given mass of NaCl (2.22 g) and its molar mass (58.44 g/mol):

moles of NaCl = mass of NaCl / molar mass of NaCl

moles of NaCl = 2.22 g / 58.44 g/mol

moles of NaCl = 0.038 moles

Next, we can use the stoichiometry of the balanced equation to determine the number of moles of NaOH that reacted. Since the mole ratio between NaCl and NaOH is 1:1, the number of moles of NaOH is also 0.038 moles.

Now, we can calculate the molarity of the base (sodium hydroxide) using the given volume of sodium hydroxide solution (0.033 L):

Molarity of NaOH = moles of NaOH / volume of NaOH solution

Molarity of NaOH = 0.038 moles / 0.033 L

Molarity of NaOH ≈ 1.15 M

Therefore, the molarity of the base used in the experiment is approximately 1.15 M.

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Explanation:

the colour change will be from orange to pink

The color change of the methyl orange indicator at the end-point will show orange to pink.

In an acidic or basic medium, an indicator is just a material that changes color. Indicators are termed indicators because they show one color in an acidic media and different colors in a basic medium. Indicators come in a variety of shapes and sizes: Natural indicators are indicators acquired from natural sources.

It is a just a acid base reaction in which methyl orange acts as a indicator.

In this reaction, when  sodium hydroxide solution and dilute sulfuric acid are reacts with each other then after using( indicator)methyl orange the color will be change form orange to pink which indicates the nature of solution will be acidic.

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The basic code structure for many SQL statements and objects can be found in the "Object Explorer" section of the SQL Server Management Studio. This section allows users to view and manage database objects, including tables, views, stored procedures, and functions, and also provides the ability to generate basic code for these objects.

To view the code for an object in SQL Server Management Studio, you can expand the Object Explorer tree view until you find the object you are interested in. Then, you can right-click on the object and select the "Script [Object] as" option, where [Object] is the type of object you are viewing (e.g., table, view, stored procedure).

Additionally, the "Query Editor" section of the SQL Server Management Studio can be used to create and execute SQL statements, including basic code for creating, modifying, and querying database objects.

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The basic code structure for many SQL statements and objects can be found in the "Object Explorer" section of the SQL Server Management Studio.

SQL can be used to store information about chemical compounds, including their names, formulas, molecular structures, and physical and chemical properties. This information can be organized into relational databases, which can then be queried using SQL to retrieve specific data sets or to perform complex calculations and analyses.

SQL can also be used to track and manage laboratory data, such as experimental results, analytical data, and instrumentation data. This can facilitate data sharing and collaboration within the scientific community, as well as improve the reproducibility and reliability of experimental results.

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Answer: When we represent a chemical reaction in terms of words, we write a word equation. For example, when hydrogen gas reacts with oxygen gas to form water, we can write a word equation for the reaction as follows: hydrogen + oxygen→ water To the left of the arrow, we have the 'before' situation.

Explanation:

The main function of using a virtual spectrometer in order to analyze astronomical bodies in space is to find the chemical composition of planets and stars.

This refers to the instrument that is used to observe the color separation of light in a controlled experiment.

Hence, we can see that another reason for the use of a virtual spectrometer to make an analysis of astronomical bodies is to indicate the speed and direction of a star or galaxy as it spreads incoming beams of light into different spectrums.

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Answer:

2 waves

Explanation:

If Frank creates 20 waves every second then the way you solve is turn it into a proportion 20 waves/10 secs = x/1 sec which then turns into the equation of 10x=20 where x=2 hence Franks creates 2 waves every second.

Antoine Lavoisier discovered in 1789 that mass is neither created nor destroyed in chemical reactions, which led to the formulation of the Law of Conservation of Mass.

Thus, That is to say, the mass of any one element at the start of a reaction will be equal to that element's mass at the conclusion of the reaction.

The overall mass will remain constant over time in any closed system if we take into account all reactants and products in a chemical reaction. Lavoisier's discovery transformed science and served as the cornerstone for contemporary chemistry.

Because naturally occurring elements are extremely stable under the circumstances present on the Earth's surface, the Law of Conservation of Mass is valid.

Thus, Antoine Lavoisier discovered in 1789 that mass is neither created nor destroyed in chemical reactions, which led to the formulation of the Law of Conservation of Mass.

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Answer:

Explanation:

My guess is option c

A decomposition reaction is a chemical reaction in which one reactant breaks down into two or more products.

A metathesis reaction is a chemical reaction in which the positive ions and negative ions present in the reactants appear to exchange partners.

Answer:

it means that things people come up with can be tested and they can turn it into the truth or in another sense figure out if its true or not

Explanation:they can figure out if its real or not and or turn it into the facts from what people make up and or think so and so is this or that and they can find out the truth

Answer:

E - Atomic mass is calculated by weighted atomic average using all the isotope data available.

G - Mass number is equal to the sum of protons and electrons in an atom.

Explanation:

Take an element

\(\\ \bull\sf\longmapsto _{25}Mg^{12}\)

To calculate the pH change of a solution with an initial concentration of HC2H3O2 (acetic acid) and NaC2H3O2 (sodium acetate),

follow these steps:

1. Identify the initial concentrations of HC2H3O2 and NaC2H3O2 given in the problem.
2. Determine the Ka value of HC2H3O2 (acetic acid) from a reference source, which is 1.8 x 10^(-5).
3. Calculate the initial pH of the solution using the formula: pH = -log([H+]), where [H+] is the concentration of hydrogen ions in the solution.
4. Since NaC2H3O2 is the conjugate base of HC2H3O2, use the Henderson-Hasselbalch equation to calculate the new pH after adding NaC2H3O2: pH = pKa + log([A-]/[HA]), where pKa = -log(Ka), [A-] is the concentration of the conjugate base (NaC2H3O2), and [HA] is the concentration of the weak acid (HC2H3O2).
5. Calculate the pH change by subtracting the initial pH from the new pH.

By following these steps, you can determine the pH change when the initial concentrations of HC2H3O2 and NaC2H3O2 are given.

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Chefs measure the number of ingredients they need before preparing foods for accuracy, consistency, and balancing flavors.

Measurements ensure accuracy and consistency in recipes. Cooking is a precise process, and precise measurements of ingredients are crucial for achieving the desired taste, texture, and overall outcome of a dish. By measuring ingredients, chefs can replicate their recipes consistently, ensuring that each dish turns out as intended.

Certain ingredients, such as spices, seasonings, and acids, can greatly impact the taste of a dish. By carefully measuring these ingredients, chefs can maintain a precise balance of flavors.

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Fresh air contains approximately 300 ppm CO2, whereas the breath of an intoxicated person contains about 3 percent CO2. The amount of CO2 in the breath of an intoxicated person is 100 times the amount of CO2 in fresh air.

How many times the amount of CO2 is in the breath of an intoxicated person as compared to fresh air? The amount of CO2 in the breath of an intoxicated person is 100 times the amount of CO2 in fresh air. Key Points Carbon dioxide concentration in fresh air is approximately 300 ppm. The carbon dioxide concentration in the breath of an intoxicated person is roughly 3 percent of the total volume of exhaled air. Calculation: We are given that the concentration of carbon dioxide in fresh air is roughly 300 ppm.

We are also told that the concentration of carbon dioxide in the breath of an intoxicated person is roughly 3 percent of the total volume of exhaled air. To calculate the answer, we can use the fact that 1 percent is the same as 1/100 or 0.01. As a result, we can convert the percent value to a decimal by dividing by 100.Therefore, 3 percent of the total volume of exhaled air is 0.03. Next, we can compare this value to the concentration of carbon dioxide in fresh air, which is roughly 300 ppm.

To do so, we will divide the concentration of CO2 in the breath of an intoxicated person by the concentration of CO2 in fresh air:0.03 / (300 ppm) = 0.0001 or 1/10000.1/10000 is the same as 1/1000 x 1/10. So, 1/10 is the same as 10/100. Therefore,1/1000 x 10/100 = 10/1,000= 1/100 times or0.1 times

In conclusion, the amount of CO2 in the breath of an intoxicated person is 100 times the amount of CO2 in fresh air.

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Answer:

H+ contains 1 proton, 0 neutrons, 0 electrons.

Explanation:

Answer:

The answer is the layer of the sun that radiates energy outwards from the sun core

Explanation:

the reason why that is becuase the convection zone is a layers which is unstable to convection. And energy is primarily or partially transported by convection

Answer:

D

Explanation:

Answer:

The formation of double and triple bonds is not as widespread among the atoms of the periodic table as one might expect. At least one of the atoms involved in a multiple bond is almost always C, N, or O, and in most cases both atoms are members of this trio

Covalent bonding occurs when electrons are shared between atoms. Double and triple covalent bonds occur when four or six electrons are shared between two atoms, and they are indicated in Lewis structures by drawing two or three lines connecting one atom to another.

Explanation:

The phase diagram represents the different phase transitions that occur in matter. The arrow labeled "1" represents the transition from a solid to a liquid state, which is commonly known as melting or fusion.

When a substance undergoes melting, it absorbs a specific amount of energy known as the latent heat of fusion. To identify the arrow that most likely represents a phase change involving the same amount of energy as arrow 1, we need to consider the specific phase transitions and their associated energy changes. The phase transition directly opposite to melting on the phase diagram is the transition from a liquid to a solid state, known as freezing or solidification. This transition involves the release of the same amount of energy that was absorbed during melting.

Hence, the arrow that most likely represents the phase change involving the same amount of energy as arrow 1 is arrow "6," which signifies the transition from a liquid to a solid state. Both melting and freezing involve the same amount of energy exchange, as they are reversible processes occurring at the same temperature.

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Answer: 68 and liquid

Explanation:

68 because the room temperature is balanced with the fish bowl and liquid because milk can flow and doesn’t have a fixed volume

Answer:

Moving blood through your body

Explanation:

Thats the job of vascular system IE heart arteries and veins.

By performing the necessary calculations and comparing the Q/K ratios, we can determine whether calcite or dolomite would form first in the given water sample with [Mg2+]∼0.10 mmol/L.

To determine which mineral, calcite or dolomite, would form first in the given water sample with [Mg2+]∼0.10 mmol/L, we need to calculate the saturation index (SI) for each mineral by comparing the Q/K ratios. The mineral with the higher SI will be more likely to precipitate first.

The saturation index (SI) is calculated by comparing the ion activity product (Q) with the equilibrium constant (K) for a particular mineral. In this case, we have the equilibrium reaction: CaMg(CO3​)2​⇌Ca2++Mg2++2CO3​2−.

For calcite, the Q/K ratio can be calculated using the concentration of Ca2+ and CO3​2− ions in the water sample. Since dolomite contains both Ca2+ and Mg2+ ions, we need to consider the concentration of Mg2+ as well.

By comparing the Q/K ratios for calcite and dolomite, we can determine which mineral has a higher saturation index (SI). The mineral with the higher SI will be more likely to precipitate first.

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To calculate the heat energy absorbed by the water, we can use the formula:

Q = mcΔT

Where Q is the heat energy absorbed, m is the mass of the water, c is the specific heat capacity of water, and ΔT is the change in temperature.

First, we need to calculate the mass of the water in the top 1 cm of the area:

Volume of top 1 cm of water = 1 cm x 100 km x 100 km = 1 x 10⁸ m³

Density of water = 1000 kg/m³

Mass of water = Volume x Density = 1 x 10⁸ m x 1000 kg/m³ = 1 x 10¹¹ kg

Next, we can calculate the heat energy absorbed using the specific heat capacity of water (4.184 J/g°C):

ΔT = 27°C - 25°C = 2°C

Q = (1 x 10¹¹ kg) x (4.184 J/g°C) x (2°C) = 8.368 x 10¹¹ J

Therefore, the water in the top 1 cm of the 100 km by 100 km area has absorbed approximately 8.368 x 10¹¹ joules of heat energy.

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Answer:

1)By adding solute to the solution

2)25g/40ml =5g/8ml

3)Because all soluble solutes dissolve in water