When
2.0M
aqueous solutions of sodium bicarbonate and hydrochloric acid react, it produces carbon dioxide, water and sodium chloride. Calculate the number of moles of carbon dioxide formed if
31.6 mL
of sodium bicarbonate reacts with excess hydrochloric acid.
15.8 moles CO 2
​
0.0632 moles CO 2
​
32.4 moles CO 2
​
0.0648 moles CO 2
​
​

The atom has 21 protons because it is neutral and has the same number of protons as electrons. It also has 22 neutrons, which we calculated by subtracting the number of protons from the mass number.

The mass number of an atom represents the total number of protons and neutrons in its nucleus. Since the atom is neutral, it means it has the same number of protons as electrons.

Given that the atom has a mass number of 43, this means it has a total of 43 protons and neutrons. We can determine the number of protons by subtracting the number of neutrons from the mass number.

To find the number of neutrons, we subtract the number of protons from the mass number. Since the atom is neutral and has 21 electrons, which is also equal to the number of protons, we can conclude that it has 21 protons.

Therefore, to determine the number of neutrons, we subtract 21 (number of protons) from 43 (mass number). This gives us 22 neutrons.

In summary, the atom has 21 protons because it is neutral and has the same number of protons as electrons. It also has 22 neutrons, which we calculated by subtracting the number of protons from the mass number.

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Answer: Citation generators are programs that turn information about a source into a citation that the writer can use in a project.

Explanation:

An ACS citation generator is an online tool that creates citations in the American Chemical Society (ACS) citation style. It does this automatically by taking in a key identifier for an article or document, such as a URL for websites, ISBN for books, or ISSN for journal articles.

Programs known as "citation generators" transform information about a source into a citation that the author can use in a project. Although there are numerous citation generators, the majority operate in the same way generally: Information about a source is given to the generator.

Citefast is an online citation generator that advertises itself as both a quick and free tool. Citefast can create citations for you using many sources, including ISBNs and web page URLs. You can enter the data on your own by typing.

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Lewis symbols are diagrams that show the valence electrons of an atom. They are also known as Lewis dot diagrams or electron dot diagrams.

Thus, Lewis structures are diagrams that show the valence electrons of atoms within a molecule. They are often referred to as Lewis dot structures or electron dot structures.

The valence electrons of atoms and molecules, whether they reside as lone pairs or within bonds, can be seen using these Lewis symbols and structures.

A positively charged nucleus and negatively charged electrons make up an atom. The electrons are "bound" to the nucleus and remain a specific distance away from it thanks to the electrostatic attraction between them.

Thus, Lewis symbols are diagrams that show the valence electrons of an atom. They are also known as Lewis dot diagrams or electron dot diagrams.

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Answer:

c

Explanation:

the rest are chemical properties

A star evolves off the main sequence when helium is exhausted in the stellar core.Our solar system’s gas giant planets (and those of other solar systems) did not become stars because they are not massive enough to generate the high temperatures and pressures necessary to start hydrogen fusion in the core.

Stars evolve off the main sequence when the nuclear fusion in their cores is no longer capable of supplying sufficient energy to maintain the gravitational energy, causing it to contract and the outer layers to expand and cool. When hydrogen runs out in the core of a star, the core shrinks and heats up and the outer layers expand, resulting in a red giant. However, when helium is consumed in the core, the core collapses and heats up, causing the outer envelope to get expelled, and the core evolves into a white dwarf.

A gas giant planet's temperature and pressure aren't high enough to generate fusion. They aren't dense enough to generate the heat required for nuclear fusion. Therefore, gas giant planets do not generate their own light and heat in the same way as stars. They can emit more energy than they obtain from the sun if they have a significant atmosphere. The planets in the solar system, such as Jupiter and Saturn, are examples of gas giants.

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Answer: the total mass number of the reactants should equal the total mass number of the products

Explanation:

I took the quick check

The equation is correctly written if the total mass number of the reactants should equal the total mass number of the products.

This is defined as written representation of the process that occurs during a chemical reaction and consists of the reactant and product parts.

An equation correctly written if it's balanced and it involves the total mass number of the reactants being equal the total mass number of the products.

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Answer:

Increasing the temperature increases reaction rates because of the disproportionately large increase in the number of high energy collisions.

Explanation:

Hope this helps :)

Explanation:

hope the picture above helps u to understand:)

In 1 lb there are 450 grams (Rounded upto  2 - Significant figures).

We have a weight gain of 1.0 lb.

We have to convert it into grams.

I lb = 453.592 grams

According to the question -

A = 1 lb

Converting it into grams, we get -

1 lb = 1 x 453,592 = 453.592 grams

Rounding up to 2 - Significant figures, we get -

1 lb = 450 grams

Hence, in 1 lb there are 450 grams (Rounded upto  2 - Significant figures).

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Starting with solid argon at room temperature, we need to cool it to -189.2 c to convert it into the liquid state.

Then, we need to heat it slightly till it reaches a temperature of -185.7 c. At this temperature, the liquid argon will convert into gaseous argon.

There are three states of matter i.e, solid state, liquid state, and gaseous state. These states are interconvertible which means that we can convert a substance from one state to another.

The conversion from solid to liquid and then gas or vice versa happens at specific temperatures that are known as boiling point, melting point, freezing point, etc.

The melting point is the temperature at which a solid gets converted into a liquid.

The boiling point is the temperature at which a liquid gets converted into a gas.

The melting and boiling points of Argon are -189.2 °C and -185.7 °C respectively.

Thus, starting with solid argon at room temperature, we need to cool it to   -189.2 °C to convert it into the liquid state.

Then, we need to heat it slightly till it reaches a temperature of -185.7 °C. At this temperature, the liquid argon will convert into gaseous argon.

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Answer:

19-24 cm

Explanation:

Answer:

the answer is 19-24 cm

Explanation:

i did the study island

MC1R or melanocortin 1 receptor is a transmembrane G-protein-coupled receptor that is involved in the regulation of melanin production in melanocytes, which is responsible for skin pigmentation.

The MC1R signaling pathway plays a key role in the regulation of skin and hair color, and genetic variations in MC1R have been linked to various skin and hair disorders, including melanoma, basal cell carcinoma, and red hair color.

The MC1R signaling pathway is activated by binding of the ligand α-melanocyte-stimulating hormone (α-MSH) to the receptor, which leads to the activation of adenylate cyclase, production of cyclic AMP (cAMP), and activation of protein kinase A (PKA).

PKA then phosphorylates and activates CREB, a transcription factor that binds to the promoter region of target genes, including the melanogenic enzymes tyrosinase, tyrosinase-related protein 1 (TRP1), and dopachrome tautomerase (DCT), which are involved in the synthesis of melanin.

MC1R signaling can also be modulated by other ligands, including agouti signaling protein (ASP), which inhibits α-MSH binding and MC1R activation, and β-defensins, which activate MC1R independently of α-MSH and stimulate melanin production.

In addition, MC1R signaling can be regulated by downstream effectors, such as MITF (microphthalmia-associated transcription factor), a transcription factor that regulates the expression of melanogenic genes, and SOX10 (SRY-related HMG-box 10), a transcription factor that is involved in the differentiation and survival of melanocytes.

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False. The distance between molecules decreases for all solids when they turn into liquids.

When a solid turns into a liquid, the distances between molecules generally decrease, rather than increase.

In a solid, molecules are typically arranged in a regular, ordered pattern and are closely packed together. As the solid is heated and melts, the molecules gain kinetic energy, causing them to vibrate and move more rapidly.

This increase in motion allows the molecules to break free of their ordered positions and slide past one another, resulting in a decrease in intermolecular distances and a transition from a solid to a liquid state.

There are some exceptions to this general trend, such as in cases where the solid structure is more porous and loosely packed than the liquid, but in most cases, the statement is false.

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Answer:

response I believe

Explanation:

i'm pretty sure it's a response cause it's the animal responding to needing water and being thirsty

hope this helps! :)

The acid hydrogen fluoride can be dissolved in pure water. The pH of the solution will be acidic.

When hydrogen fluoride (HF) dissolves in water, it undergoes partial dissociation to produce hydronium ions (H₃O⁺) and fluoride ions (F⁻). The resulting solution becomes acidic.

HF(aq) + H₂O(l) ⇌ H₃O⁺(aq) + F⁻(aq)

The pH of the solution can be determined by calculating the concentration of hydronium ions (H₃O⁺). Since HF is a weak acid, it does not dissociate completely in water.

We can make a general statement that the pH of the solution will be less than 7, indicating acidity. This is because HF is a weak acid that partially dissociates, forming hydronium ions.

So, the pH of the solution after dissolving hydrogen fluoride in pure water will be acidic.

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The compound that will undergo Friedel-Crafts alkylation most rapidly with (CH3)3CCl, AlCl3 is acetophenone.

Friedel-Crafts alkylation is a reaction in which an alkyl group is added to an aromatic ring using a Lewis acid catalyst such as AlCl3. In this case, the alkylating agent is (CH3)3CCl, also known as tert-butyl chloride. Among the given options, acetophenone is the most reactive towards Friedel-Crafts alkylation due to its electron-withdrawing carbonyl group.

The carbonyl group in acetophenone activates the aromatic ring towards electrophilic aromatic substitution reactions, such as Friedel-Crafts alkylation. The presence of the electron-withdrawing carbonyl group enhances the electrophilicity of the ring, making it more susceptible to attack by the tert-butyl carbocation formed in the presence of AlCl3. Therefore, acetophenone will undergo Friedel-Crafts alkylation most rapidly compared to the other compounds given.

Among the given compounds, acetophenone will undergo Friedel-Crafts alkylation most rapidly with (CH3)3CCl, AlCl3 due to the presence of the electron-withdrawing carbonyl group, which activates the aromatic ring towards electrophilic aromatic substitution reactions.

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Atoms combine in the initial manner by transferring electrons among themselves because their particular nuclei are attracted to the electrons from other atoms. When the compounds being produced are at a lower energy than the original atoms, atoms combine to form compounds. The chemicals inside the reactants interact throughout hydrolysis reaction to create new substances.

Atoms create new substances by swapping electrons with each other rather than by gaining neutrons from each other. When two or more atoms share at least one pair of electrons, this is known as a covalent connection. Ionic bonds form when positive and negative bonds are attracted to each other and share a proton as a result .

element with one another in order to build a comprehensive electron shell, which increases stability. Subatomic particles may fill up the sell of electrons and then become permanent by sharing their topmost (valence) electrons.

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The correct answers are option B. Currents occur at the surface of and deep within the ocean, C. The Coriolis effect contributes to the direction of current flow, E. Wind direction, the spin of Earth, and differences in temperature contribute to currents.

Ocean currents are continuous movements of ocean water driven by a variety of factors, including wind, temperature, salinity, and the rotation of the Earth. These currents can be either surface or deep, and they play a vital role in regulating global climate by distributing heat and nutrients throughout the oceans. Surface currents are driven primarily by wind, while deep currents are driven by differences in water density caused by variations in temperature and salinity. Some of the major ocean currents include the Gulf Stream, the Kuroshio Current, and the Antarctic Circumpolar Current.

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The full question is:

Which statement describes currents in the oceans? Check all that apply

A. El Nino is a current of water between Australia and North America

B. Currents occur at the surface of and deep within the ocean

C. The Coriolis effect contributes to the direction of current flow

D. Currents often change in unpredictable ways, causing climate change

E. Wind direction, the spin of Earth, and differences in temperature contribute to currents

Answer:

option B. less time than the other runners

hope it helps you

Track runners will all cover the same distance. The winner will take less time than the other runners. Therefore, the correct option is option B.

Despite the direction of something like the journey, distance is the overall path that an item in motion has traveled. Since just the length of the path travelled is calculated as well as the motion direction is ignored, distance is referred to as a scalar number.

Displacement is described as the overall alteration of an object's location and motion direction. Displacement is recognized as a vector quantity since it takes into consideration both the directions of the motion and the amount of the changing position. Track runners will all cover the same distance. The winner will take less time than the other runners.

Therefore, the correct option is option B.

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Answer:

133.333333333 cm^3

Explanation:

Volume = Mass/Density

Answer:

Two design criteria for the design of the ammonia making process are;

1) Sustainable hydrogen production by renewable energy

2)  Sustainable use of the ammonia-water thermal absorption cycle to retrieve the ammonia present in the waster water

Explanation:

Ammonia is produced from natural gas in the following process;

H₂ + RSH → RH + H₂S

H₂S + ZnO → ZnS + H₂O (Waste water)

CH₄ + H₂O → CO + 3H₂

CO + H₂O → CO₂ + H₂

Ammonia is then produced by reacting the produced hydrogen with nitrogen in the presence of a catalyst in a process known as the Haber-Bosch process as follows;

3H₂ + N₂ → 2NH₃

The

The design criteria for the design of the ammonia making process therefore as follows;

1) Sustainable use of renewable energy to produce hydrogen gas from the electrolysis of water

2)  Use of the ammonia-water thermal absorption cycle to retrieve the ammonia present in the waster water.

The branch of science which deals with chemicals and their bond is called chemistry.

The two ways by which we can design ammonia making process is as follows:-

Two design criteria for the design of the ammonia making process are:-

The usage of ammonia is important in these ways:-

Hence, these are the design for the ammonia-making process.

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Answer:

\(ClO^-\\\\Sr^{2+}\)

Explanation:

Hello there!

In this case, according to the reaction between hypochlorous acid and strontium hydroxide which yields stontium hypochlorite and water as a neutralization reaction:

\(2HClO(aq)+Sr(OH)_2(aq)\rightarrow Sr(ClO)_2(aq)+2H_2O(l)\)

Thus, since HClO is a weak acid, it is not fully ionized so the complete ionic equation turns out to be:

\(2H^++2ClO^-+Sr^{2+}+2(OH)^-\rightarrow Sr^{2+}+2(ClO)^-+2H_2O(l)\)

Whereas the spectator ions, which remain the same at both sides of the equation, are:

\(ClO^-\\\\Sr^{2+}\)

Best regards!

0.1 M nitrous acid (HNO2) and 0.12 M sodium nitrite (NaNO2) are combined to create a buffer. (Ka=4.5x10-4) After 0.016 mol of NaOH has been added to 1.00 L of the buffer, determine the pH.

A buffer solution, sometimes referred to as a pH buffer or hydrogen ion buffer, is an aqueous combination of a weak acid and its conjugate base, or vice versa. The pH nitrous changes at all when a small amount of a strong acid or basic is added to it. Buffer solutions are used in a wide range of chemical processes to keep pH values almost constant. Buffering is used by many biological systems to regulate pH in the natural world. For instance, the bicarbonate buffering system regulates the pH of blood.

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The carbon atom reduced in the transformation of chloromethane to methyllithium.

The reaction between chloromethane  and lithium form methyllithium.

\(CH_{3} Cl+ 2Li\) → \(CH_{3} Li+ LiCl\)

In above reaction, methyllithium is formed by the dispersing of lithium metal and adding chloromethane  .

The carbon atom in chloromethane  is partial positive charge because chlorine is high electronegative atom. The carbon atom in methyllithium is partial negative charge because carbon is more electronegative than lithium.

So, in above reaction two lithium metal donate two electron ( each lithium donate one electron) to the carbon atom(having positive charge) of chloromethane and get negative charge in methyllithium .

The gain of electron is reduction. So,The carbon atom reduced in the transformation of chloromethane to methyllithium.

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Explanation:

The unequal sharing of electrons between the atoms and the unsymmetrical shape of the molecule means that a water molecule has two poles - a positive charge on the hydrogen pole (side) and a negative charge on the oxygen pole (side). We say that the water molecule is electrically polar.

Answer:

i beleive iron

Explanation:

Answer:

C. You have two times the number of particles that are in 12 grams of carbon-12.

Explanation:

Avogadro's number, 6.022 ×10^23, equals the number of particles in 12 grams of carbon-12.

This mean 1 mole of a substance will equals to the number of particles that are in 12 grams of carbon-12.

Therefore, 2 moles of a substance will equals to two times the number of particles that are in 12 grams of carbon-12.

Answer:

Biochemistry is the discipline that studies the chemistry of life, and its objective is to explain form and function based on chemical principles. Organic chemistry is the discipline devoted to the study of carbon-based chemistry, which is the foundation for the study of biomolecules and the discipline of biochemistry. Both biochemistry and organic chemistry are based on the concepts of general chemistry, some of which are presented in Fundamentals of Physics and Chemistry Important to Microbiology.

Explanation: