What causes the release of calcium from the terminal cisternae.

Answer:

False

Explanation:

Brainliest Please :D

Answer:

1440

Explanation:

32 cans/bundle and there are 45 bundles 32 x 45 = 1440

Answer: Thus, the number of moles of aluminum chloride could be produced from 27.0 g of aluminum is 1.0 mol.

Explanation:

Answer:

those things that looks like cristals

If more \(H_{2}\) and \(N_{2}\) are added to the reaction 3\(H_{2}\) + N2 → 2\(NH_{3}\) after it reaches equilibrium, two events will occur Shift in Equilibrium and Increased Yield of \(NH_{3}\)

1. Shift in Equilibrium: According to Le Chatelier's principle, when additional reactants are added, the equilibrium will shift in the forward direction to consume the added reactants and establish a new equilibrium. In this case, more \(NH_{3}\) will be produced to counteract the increase in \(H_{2}\) and \(N_{2}\).

2. Increased Yield of \(NH_{3}\): The shift in equilibrium towards the forward reaction will result in an increased yield of \(NH_{3}\). As more \(H_{2}\) and \(N_{2}\) are added, the reaction will favor the production of \(NH_{3}\) to maintain equilibrium. This will lead to an increase in the concentration of \(NH_{3}\) compared to the initial equilibrium state.

It is important to note that the equilibrium position will ultimately depend on factors such as the concentrations of \(H_{2}\), \(N_{2}\), and \(NH_{3}\), as well as the temperature and pressure of the system. By adding more reactants, the equilibrium will adjust to achieve a new balance, favoring the formation of more \(NH_{3}\).

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If Chicago had experienced its average highest temperature in August, the longest day remains the same and that is the 21st of June.

The effect of temperature induces the combination of more direct rays of the sunlight as the result of the tilting of the earth's hemisphere towards the sun to receive more solar energy and possess a warmer temperature.

But the temperature of a particular region also depends on the humidity and other abiotic parameters. So, if Chicago had experienced its average highest temperature in August, it does not mean that the longest day is in the month of August. It will remain, as usual, i.e 21 June.

Therefore, if Chicago experienced its average highest temperature in August, the longest day remains the same and that is the 21st of June.

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Answer:

Heat can travel from one place to another in three ways: Conduction, Convection and Radiation. Both conduction and convection require matter to transfer heat.

If there is a temperature difference between two systems heat will always find a way to transfer from the higher to lower system.

Answer:

B

Explanation:

I think it is B. That is because when you are falling, your just going to fall faster and faster.

I hope this helps!

Answer:

B

Explanation:

The third force the jumper experiences is a spring force due to the bungee cord. The amount that the bungee cord pulls back on the jumper depends on how far the cord has been stretched, i.e. the farther the jumper has fallen, the more the cord pulls back on him or her.

Answer:

is cool is cool goodcripopo

Acetic acid is a weak acid present in commercial vinegar that can be used to create a buffer solution.

A buffer solution is a solution that can resist changes in pH when small amounts of acid or base are added to it. A buffer solution is made up of a weak acid and its corresponding conjugate base (or a weak base and its corresponding conjugate acid). Acetic acid is a weak acid that is present in commercial vinegar, and it can be used to create a buffer solution when combined with a salt of its conjugate base (such as sodium acetate).

Acetic acid has a pKa value of approximately 4.76, which means that it is a weak acid that does not dissociate completely in water. This property allows acetic acid to act as a buffer in a solution, helping to maintain a relatively constant pH even when small amounts of acid or base are added.

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Answer:

Both of them are polluting the environment. Industrial pollution is the pollution caused from industries and it can be in different forms such as water waster or air pollution. Agricultural pollution is caused from plants or crops that are grown by the farmers. For example, pesticides that may ruin the soil and is dangerous for our environment.

Explanation:

Answer:

A. 4 cm, 40 mm

B. 5.5 cm, 50 mm

C. 8.8cm, 80 mm

D. 8.2 cm, 82 mm

E. 9.5cm, 95 mm

Explanation:

NB: 1 cm = 10 mm

Electron are the orbiting particles, by which an atom is surrounded by.

Unattached or attached to an atom, an electron is a negatively charged subatomic particle (not bound). One of the three main types of particles inside an atom, along with protons and neutrons, is an electron that is linked to the atom.

An atom's nucleus is made up of electrons, protons, and neutrons. The positive charge of a proton balances out the negative charge of an electron. An atom is in a neutral state if its protons and electrons are equal in number.

They have a mass that is considerably lower, exist outside of the nucleus, and display both wave- and particle-like properties. Since an electron is also a fundamental particle, it is unreinforced and unbroken.

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The correct balanced molecular equation for the reaction between potassium iodide (KI) as well as silver nitrate (AgNO₃) is; KI(aq) + AgNO₃(aq) → AgI(s) + KNO₃(aq).

This equation shows that when KI and AgNO₃ are mixed, they react to form solid silver iodide (AgI) and aqueous potassium nitrate (KNO₃).

As silver iodide is a yellow-colored solid, the student should be able to see a reaction occurring in the test tube, in the form of a yellow precipitate.

Silver iodide (AgI) is a chemical compound made up of the elements silver (Ag) and iodine (I). It is a yellow-colored solid which is insoluble in water. Silver iodide is widely used in various applications, such as photography, cloud seeding, and as a laboratory reagent. In photography, it is used as a light-sensitive material in the production of photographic films and papers.

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Answer:

Presence of an Electrolyte

Metal Surface

Oxygen or Other Oxidizing Agent

Difference in Potential

Electrochemical Pathway

Explanation:

The better choice of compound to add to the sidewalk to prevent ice would be the 55 g/mol salt with an n value of 3.

A higher n value will result in a greater freezing point depression, which means that the solution will have a lower freezing point. In other words, the 55 g/mol salt will lower the freezing point of water more than the 40 g/mol compound, making it a more effective ice melter.

It is important to note that the amount of salt or other ice melter that you need to use will depend on the conditions. For example, you will need to use more salt in colder weather. You should also be careful not to use too much salt, as this can be harmful to plants and animals.

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The molar mass of a compound is the sum of the atomic masses of all the atoms present in one molecule of the compound. the molar mass of manganese hydroxide is 88.94 g/mol.

To calculate the molar mass of manganese hydroxide, we need to find the atomic masses of each of the elements and add them up in the correct proportions.

The atomic mass of manganese (Mn) is 54.94 g/mol.

The atomic mass of hydrogen (H) is 1.01 g/mol, and the atomic mass of oxygen (O) is 16.00 g/mol.

The formula for manganese hydroxide is Mn(OH)₂, which means there are two hydroxide ions (OH⁻) present for every one manganese atom.

To calculate the molar mass of manganese hydroxide, we add up the atomic masses of all the atoms present in one molecule of the compound: Molar mass of Mn(OH)₂ = (atomic mass of Mn) + 2(atomic mass of O) + 2(atomic mass of H) = 54.94 g/mol + 2(16.00 g/mol) + 2(1.01 g/mol) = 88.94 g/mol

Therefore, the molar mass of manganese hydroxide is 88.94 g/mol.

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There are 1.81 × 10²⁴ molecules of sucrose in the given sample.

To calculate the number of molecules of sucrose in the given sample, we need to first determine the number of moles of carbon atoms present in the sample, and then use the molecular formula of sucrose to calculate the number of molecules.

Calculate the number of moles of carbon atoms in the sample:

We know that the sample contains 3.6 × 10²⁴ atoms of carbon. The molar mass of carbon is approximately 12 g/mol.

Therefore, the mass of carbon in the sample can be calculated as follows:

mass of carbon = number of atoms of carbon × molar mass of carbon

= 3.6 × 10²⁴ × 12 g/mol

= 4.32 × 10²⁵ g

To calculate the number of moles of carbon in the sample, we divide the mass of carbon by the molar mass of carbon:

number of moles of carbon = mass of carbon / molar mass of carbon

= 4.32 × 10²⁵ g / 12 g/mol

= 3.6 × 10²⁴ mol

Calculate the number of molecules of sucrose in the sample:

To calculate the number of molecules of sucrose in the sample, we can use the following formula:

number of molecules of sucrose = (number of moles of carbon / 12) × Avogadro's number

where;

Substituting the values, we get:

number of molecules of sucrose = (3.6 × 10²⁴ mol / 12) × 6.02 × 10²³ molecules/mol

= 1.81 × 10²⁴ molecules

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There are two types of chemical compound one is covalent compound and another is ionic compound in chemistry. In ionic bonds, electrons are completely transferred. The correct option is option C.

Chemical Compound is a combination of molecule, Molecule forms by combination of element and element forms by combination of atoms in fixed proportion.

Covalent compounds are formed by covalent bond and ionic compounds are formed by ionic bond. Covalent bond is formed by sharing of electron and ionic bond are formed by complete transfer of electron. Ionic bonds are stronger than covalent bonds. The melting and boiling points are higher in ionic compounds.

Ionic bonds are formed by elements whose electronegativity difference is very large. Since K has high electronegativity among all given elements so K is most likely to react with Br.

Therefore, the correct option is option C.

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Answer:

Gas

Explanation:

The atoms, ions, or molecules that make up the gas are further apart and move freely at high speeds and is can easily be compressible.

Answer:

Gas

Explanation:

A gas is a substance or matter in a state in which it will expand freely to fill the whole of a container' having no shape like a solid and no fixed volume like a liquid.

According to the electronic configuration of atoms the valence electrons are should be present in the inner and outer shell.

What is valence electrons?

The term "valence electrons" refers to the electrons that make up an atom's outermost energy level or shell. Oxygen has six valence electrons, two of which are in the 2s subshell and four of which are in the 2p subshell. The oxygen valence electrons have the configuration 2s22p4.

What is electrons?

Protons, neutrons, and the electron that is bound to the atom make up the three main types of particles that make up an atom.

A. The electronic configuration of O is:

1s^2*2s^2*2p^4

inner electrons = 2

outer electrons = valence electrons = 4.

B. The electronic configuration of Sn is

(Kr)4d^10*5s^2*5p^4

inner electrons = 46

outer electrons = valence electrons = 4.

C. The electronic configuration of Ca is:

(Ar)4s^2

inner electrons = 18

outer electrons = valence electrons = 2.

D. The electronic configuration of Fe is:

(Ar) 3d^6*4S^2

inner electrons = 24

outer electrons = valence electrons = 2.

E. The electronic configuration of Se is:

(Ar)3d^10*4s^2*4p^4

inner electrons = 28

outer electrons = valence electrons = 6.

Therefore, according to the electronic configuration of atoms the valence electrons are should be present in the inner and outer shell.

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Answer:

They make a rice Krispe gramcracker bar baby

Explanation:

Answer: When they meet they instantly fall in love, (lol) and have a baby.... They name the baby S'more because it has features from the graham cracker and the rice krispie.

Stay safe and have a Merry Christmas!!!!!!!! :D  

Maybe a S'more rice krispie.....

The pH of the 0.203 M HNO₃(aq) solution is approximately 0.693, indicating a highly acidic solution.

So, the correct answer is A.

To calculate the pH of a 0.203 M HNO₃(aq) solution, you need to understand that HNO₃ is a strong acid that completely dissociates in water.

The dissociation equation for HNO₃ is: HNO₃(aq) → H⁺(aq) + NO₃⁻(aq)

Since HNO₃ completely dissociates, the concentration of H⁺ ions will be equal to the concentration of HNO₃, which is 0.203 M.

The pH is calculated using the formula:

pH = -log₁₀[H⁺]

Plugging in the H⁺ concentration:

pH = -log₁₀(0.203) ≈ 0.693

Therefore, the correct answer is A) 0.693.

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Explanation:

A. Absorption. Both processes are relatod to the way drugs are absorbed into the system.

The information provided in the study guide found at the end of the chapter typically includes key concepts and terms, a summary of the chapter, and review questions or practice problems.

Study guides are collections of important information presented in an easy-to-understand way. This can help you study many different topics at once.

This information is meant to help you review and reinforce your understanding of the material covered in the chapter. Additionally, the study guide may also provide tips for studying or additional resources for further learning. It is important to review the study guide to better prepare for quizzes or exams on the material.

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Answer:

Acid rain is a stronger acid.

General Formulas and Concepts:
Acids/Bases

Explanation:

We are given that acid rain has a pH = 4.

We know that the lower the pH number, the more acidic it becomes. The higher the pH number, the more basic is becomes.

Therefore, the lower the pH scale number, the stronger the acid. Typically, the pH scale generally ranges from pH 1 to pH 14.

Comparing pH of 4 in the scale from 1 - 14, it would be a strong acid.

Topic: AP Chemistry

Unit: Acids/Bases

The reaction of methyl iodide with sodium azide, NaN₃, proceeds by an SN2 mechanism. The effect of doubling the concentration of NaN₃ on the rate of the reaction is the rate increases by a factor of 2. The correct answer is C.

The alkyl halide is attacked by the nucleophile as the SN2 mechanism. as a partial bond is formed involving the nucleophile and carbon atom. Halide and carbon's bond partially dissolves. A transition is created where there are five bonds around the carbon atom. The product is created when the leaving group, which is a halide, removes the electrons from the C-X link and departs the molecule.

R-X + Nu⁻ → Nu 

--R--X → Nu-R + X⁻ 

Since a transition state that contains both a nucleophile and a substrate is used for the nucleophilic substitution. It was discovered that the concentration of the substrate and the nucleophile both affect the rate of the reaction.

Rate = k [substrate] [nucleophile]

Since sodium azide is the nucleophilic species and methyl iodide is the substrate,

Rate = k[CH₃I][NaN₃]

both the reactants take part in the reaction and the rate law for the reaction. As a concentration of NaN₃ is doubled, the new rate becomes,

Rate' = k[CH₃I][2 NaN₃]

        = 2 k[CH₃I][NaN₃]

        = 2 Rate

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Answer:  410 nm

Explanation: Energy of a photon is E = hf = hc/λ. The smaller wavelength λ, the greater energy

When human activities release excessive amounts of carbon dioxide and other greenhouse gases into the atmosphere, then atmosphere is most greatly impacted.

Greenhouse gases are gases the in the atmosphere of Earth that trap heat.

The greenhouse gases trap heat in the atmosphere and contribute to the phenomenon of global warming, which has numerous negative effects on the climate and environment.

Excessive greenhouse gas emissions can cause rising global temperatures, more frequent and severe weather events, sea level rise, ocean acidification, and other environmental changes that have significant impacts on ecosystems, agriculture and human societies. Therefore, it is important to reduce greenhouse gas emissions to mitigate the impacts of the climate change.

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