I need help and 25 points and brainliest

Answer:

(CH3)3C--I+H2O

Explanation:

I hope I helped

The halogen or halogen-containing compound is typically used as a form of topical antisepsis will be "iodophor".

Iodine will be employed as an antiseptic in the manner of a tincture of iodine, essentially an alcoholic solution.

Iodophor would be an iodine-containing solution that also contains a solubilizing agent, like povidone or a surfactant. Iodophor would be a common sanitizer in the dairy but also brewing sectors. Generally, a high molecular weight carrier, commonly a polymer, has been polymerized with iodine.

Therefore, the halogen or halogen-containing compound is typically used as a form of topical antisepsis will be "iodophor".

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The correct order of the increasing polarity of the analyte functional group isEthers < Esters.

The given statement is "Polarities of analyte functional group increase in the order of hydrocarbon ethers < esters."  The order of polarities of functional groups is the order of their increasing polarity (i.e., less polar to more polar) based on their electron-donating or withdrawing ability from the rest of the molecule.Polarity of analyte: The analyte's polarity is directly proportional to the dipole moment of the functional group, which is associated with a difference in electronegativity between the atoms that make up the functional group.The electronegativity of an element is its ability to attract electrons towards itself. The greater the difference in electronegativity between two atoms, the more polar their bond, and hence the greater the polarity of the molecule.

To find the correct order of the increasing polarity of the analyte functional group, let's first compare the two groups: hydrocarbon ethers and esters. Here, esters have a carbonyl group while ethers have an oxygen atom with two alkyl or aryl groups. The carbonyl group has more electronegative oxygen, which pulls electrons away from the carbon atom, resulting in a polar molecule. On the other hand, ethers have a less polar oxygen atom with two alkyl or aryl groups, making them less polar than esters. Therefore, the correct order of the increasing polarity of the analyte functional group isEthers < Esters.

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Most chlorine atoms contain 18 neutrons as mole ratio of chlorine-35 and chlorine-37 is more than 1.

An atom is defined as the smallest unit of matter which forms an element. Every form of matter whether solid,liquid , gas consists of atoms . Each atom has a nucleus which is composed of protons and neutrons and shells in which the electrons revolve.

The protons are positively charged and neutrons are neutral and hence the nucleus is positively charged. The electrons which revolve around the nucleus are negatively charged and hence the atom as a whole is neutral and stable due to presence of oppositely charged particles.

let the moles of chlorine-35 is n1 and chlorine-37 is n2

now we will use the formula of average atomic mass

M=n₁M₁+n₂M₂/n₁+n₂

let say, n₁/n₂=x

substitution gives,35.45=x(35)+37/x+1 which on solving gives x=3.44

since mole ratio is more than 1, that's why most chlorine atoms have 18 neutrons.

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Answer:

27. Element (Because it contains all same atoms)

28. Compound (It contains atoms held together through chemical bonds)

29. Element (it contains all same atoms)

33. Mixture (It contains different atoms but they are not held together through chemical means)

34. Compound (Different atoms held together through chemical means)

35. Mixture (Mixture of elements and compounds)

30. Element (it contains all same atoms)

31. Mixture (Mixture of elements and compounds)

32. Element (Contain all same atoms although held together through chemical means they are not compounds)

The lines in a line graph aid in the fairly early detection of trends, allowing the viewer to make predictions about the data that has not yet been recorded.These are appropriate for illustrating the data points since, given one variable, the other is simple to ascertain.

A line graph, often known as a line chart, is a visual representation of data that is continuously changing over time.

There are two axes. in a line graph, the occurrences and categories being compared throughout time are shown on the x-axis (abscissa), and the scale, which is a group of integers that reflects the data and is divided into equal intervals, is shown on the y-axis (ordinate).

Depending on the data, the graph's lines may either decline or ascend. It is practical to plot time graphs along the x/y axis since it shows the rise and fall of data points in great detail.

The reader may readily see changes in one group over time by choosing the appropriate scales for each axis (time on the x-axis and change is measured on the y-axis).

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To determine the number of moles of gas given its pressure, volume, and temperature, we can use the ideal gas law equation. The number of moles of gas is approximately 2.226 moles.

The ideal gas law equation, PV = nRT, relates the pressure (P), volume (V), number of moles (n), gas constant (R), and temperature (T) of a gas. In this case, we have the values of pressure (2.3 atm), volume (29 liters), and temperature (360 K), and we need to find the number of moles (n) of gas. Rearranging the equation to solve for n, we have n = PV / RT.

Plugging in the given values, we get n = (2.3 atm * 29 L) / (0.082057 L·atm/(mol·K) * 360 K). Simplifying the expression, we find that the number of moles of gas is approximately 2.226 moles.

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Cyclic AMP, cyclic GMP, inositol triphosphate, diacylglycerol, and calcium molecules are used as second messengers in signaling transduction pathways.

When a cell is exposed to extracellular signaling molecules, or first messengers, second messengers, or intracellular signaling molecules, are released by the cell. (Intercellular signals, a non-local form of cell signaling that includes both first and second messengers, are divided into four categories based on their range: autocrine, juxtacrine, paracrine, and endocrine.)

Second messengers cause physiological alterations at the cellular level, including depolarization, migration, apoptosis, differentiation, and proliferation. One of the catalysts for intracellular signal transduction cascades, they are: Cyclic AMP, cyclic GMP, inositol triphosphate, diacylglycerol, and calcium are examples of second messenger chemicals.

Extracellular components, frequently hormones or neurotransmitters like adrenaline, growth hormone, and serotonin, are the first messengers.

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At equilibrium, the concentration of [Cu2+] in the solution is 0.3 M. To calculate the concentration of Cu2+ ions at equilibrium, we need to understand the chemical reaction that occurs between NH3 and CuSO4.

The initial volume of the NH3 solution is 0.9 liters, and its concentration is 0.3 M. It is used to dissolve 2.5 grams of CuSO4. At equilibrium, the concentration of Cu2+ ions ([Cu2+]) can be determined. In the presence of NH3, CuSO4 undergoes a complexation reaction to form a complex ion, [Cu(NH3)4]2+.

CuSO4 + 4NH3 ⇌ [Cu(NH3)4]2+ + SO4^2-

Since the NH3 solution is in excess, we assume that all of the CuSO4 has reacted and formed the complex ion at equilibrium. Therefore, the concentration of [Cu(NH3)4]2+ at equilibrium is equal to the initial concentration of NH3.

Given that the initial concentration of NH3 is 0.3 M, the concentration of [Cu(NH3)4]2+ (which is equivalent to [Cu2+]) at equilibrium is 0.3 M.

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Answer:

Phrase

Explanation:

Phrases don't have both, but clauses do.

ANSWER

= 238.09cm³

IF THE ANSWER IS RIGHT PLEASE MARK AS BRAINLIEST

The wavelength of the emitted photon is approximately 2.44 μm.

The wavelength of the emitted photon can be determined using the Rydberg formula as follow

\(\frac{1}{\lambda}=R_H\left(\frac{1}{n_1^2}-\frac{1}{n_2^2}\right)\)

where: lambda is the wavelength of the emitted photon,

\(R_H=1.0974\times10^7\text{m}^{-1} ,$n_1=19 n_2=5 :\frac{1}\)

\({\lambda}=R_H\left(\frac{1}{19^2}-\frac{1}{5^2}\right) \frac{1}\\\\\\{lambda}=1.0974\times10^7\text{m}^{-1}\left(\frac{1}{361}-\frac{1}{25}\right) \frac{1}\\{\lambda}=1.0974\times10^7\text{m}^{-1}\left(0.002709-0.04\right) \frac{1}\\{\lambda}=1.0974\times10^7\text{m}^{-1}\times(-0.037291) \frac{1}{\lambda}=-409446.34\text{m}^{-1} \lambda=-\frac{1}{409446.34\text{m}^{-1}}=2.44\times10^{-6}\text{m}\)

Therefore, the wavelength of the emitted photon is approximately 2.44 μm.

Rounded to two decimal places, this value is equal to 2.45 μm. Thus, the correct option is A) 2.45μm.

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The standard enthalpy change for reaction (3) is 117.1 kJ.

The standard enthalpy change for reaction (3) can be calculated by using the enthalpy changes of reactions (1) and (2) and applying Hess's Law.

To do this, we need to manipulate the given equations so that the desired reaction (3) can be obtained.

First, we reverse reaction (1) to get the formation of C2H4(g) from C2H6(g):

C2H4(g)C2H6(g) ΔH° = -52.3 kJ

Next, we multiply reaction (2) by 2 and reverse it to obtain 2 moles of C2H6(g) reacting to form 3 moles of H2(g):

2C2H6(g)2C(s) + 3H2(g) ΔH° = 169.4 kJ

Now, we add the two modified equations together:

C2H4(g)C2H6(g) ΔH° = -52.3 kJ
2C2H6(g)2C(s) + 3H2(g) ΔH° = 169.4 kJ

When adding these equations, the C2H6(g) on the left side cancels out with the C2H6(g) on the right side, leaving us with the desired reaction (3):

C2H4(g) + H2(g)C2H6(g) ΔH° = -52.3 kJ + 169.4 kJ = 117.1 kJ

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Answer:

A bee sting has a ph of 5, and is therefore an acid. Litmus paper goes red (or stays red) in acidic solutions.

Answer:

The Blue Litmus Paper should turn red

Explanation:

Bee venom has a pH of 5.5, which means it is mildly acidic which in turn should make the Litmus paper turn Red. Hope this helps!

Answer:

2 grams.

Explanation:

H2 + O2 --->  H2O2

Using molar masses:

2*1 g hydrogen   reacts with 2*16  g oxygen.

so 2g H2 reacts with 32 g O2.

Answer:yes but yes

Explanation:yes

Answer:

The correct option is;

a. HIPAA

Explanation:

The federal law which safeguards Personal Health Information (PHI) is the health Insurance Portability and Accountability (HIPAA) Act of 1996 with rules regarding the security, privacy and transmission (electronically) of medical health data, was passed to improve the ease healthcare movement  between healthcare providers has also added new limitations on PHI disclosure

The HIPAA restricts with whom, when, how and where PHI can be disclosed including physically (direct in person or writing) or electronically (online, over the phone)

Therefore, Jamal had violated HIPAA.

Amount of tin in the sample is 2.2837 gm and its mass percentage in the rock is 22.837%

I₃⁻ (aq) +  Sn⁺² (aq) →  Sn⁺⁴ (aq) + 3I⁻

1 mol         1 mol

mol of NaI₃   = 34.60 mL × 1 L / 1000 mL × 0.5560 mol / L

                    = 19.2376 × 10⁻³ mol

∵ 1 mol of Sn²⁺ = 1 mol of I₃⁻

∴ mol of Sn²⁺ = 19.2376 × 10⁻³

∴ mass of Sn in sample = mol of  Sn²⁺ × molar mass

                                       = ( 19.2376 × 10⁻³ mol ) × 118.71 gm/mol

                                       = 2.28369 gm

                                       = 2.2837 gm

∴ % of tin in sample = (mass of tin) / (mass of sample ) × 100

The mass percent of a solution is defined as the ratio of the mass of solute that is present in a solution, relative to the mass of the solution

                                 = 2.2837/10 × 100

                                 = 22.837 %

Thus we can conclude that amount of tin in the sample is 2.2837 gm and its mass percentage in the rock is 22.837%

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Particulates that absorb water vapor around them are said to be hygroscopic.

Hygroscopic substances have the ability to attract and retain moisture from their surroundings. When exposed to humid air, these particulates can absorb water molecules through adsorption or absorption processes. This can lead to an increase in their size or weight as they become hydrated.

Hygroscopic substances are commonly used in various applications such as desiccants, humidity control agents, and in preserving moisture-sensitive materials. Examples of hygroscopic substances include certain salts, sugar, wood, and many organic compounds.

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President Abdel Fattah el-Sisi of Egyp

Answer:

Haile Selassie was the first chairman of OAU

Explanation:

To find the pH of a buffer consisting of 0.91 M HBrO and 0.49 M KBrO with a pKa of 8.64, you can use the Henderson-Hasselbalch equation. The equation is:

pH = pKa + log10([A-]/[HA])

Where:

- pH is the pH of the buffer solution

- pKa is the acid dissociation constant (8.64 in this case)

- [A-] is the concentration of the conjugate base (KBrO, 0.49 M)

- [HA] is the concentration of the weak acid (HBrO, 0.91 M)

Now, plug in the values into the equation:

pH = 8.64 + log10(0.49/0.91)

Calculate the log value:

pH = 8.64 + log10(0.5385)

pH = 8.64 + (-0.269)

Finally, add the pKa and the calculated log value:

pH = 8.64 - 0.269 = 8.371

Therefore, the pH of the buffer that consists of 0.91 M HBrO and 0.49 M KBrO with a pKa of 8.64 is approximately 8.37.

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Answer:

it is an endothermic reaction

Explanation:

This is because there is a rise in temperature from 20 to 46. this means that the reaction takes in heat from the suuroundings

Single displacement reactions replace a portion of another chemical species, which is the primary distinction between them and double displacement reactions.

The negative and positive ion of two ionic compounds swap positions during a double-replacement reaction to create two new compounds. A double-replacement reaction, also known as a double-displacement reaction, has the general formula AB+CDAD+CB.

When a portion of two ionic compounds is swapped, a double displacement reaction takes place, creating two new components. A twofold displacement reaction follows this pattern. In aqueous solutions, where ions precipitated and exchange occurs, double displacement processes are most common.

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A single displacement reaction occurs when one element replaces another in a chemical reaction, and a double displacement reaction occurs when two ionic species are swapped between two molecules in a chemical reaction.

One element in a compound is switched out for another in a single replacement reaction. In a double-replacement process, the anions or cations of two electrolytes are switched.

Chemical compounds known as ions are kept together by electrostatic interactions known as ionic bonding to form ionic compounds. Despite having both positively and negatively charged ions—known as cations and anions, respectively—the molecule is generally neutral.

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Answer:

Strontium, a group 2 element with an electron configuration of 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² , will form a +2 ion in a chemical bond.

Explanation:

An ionic bond is produced between metallic and non-metallic atoms, where electrons are completely transferred from one atom to another. During this process, one atom loses electrons and another one gains them, forming ions. Usually, the metal gives up its electrons forming a cation to the nonmetal element, which forms an anion.

So an ion is an atom or group of atoms that have an electric charge. A cation is an ion that has a positive charge.

The alkali metals in the earth (Elements IIA) lose two electrons to form a 2+ cation. Strontium is an alkali metal that loses the two electrons belonging to 5s², forming the +2 ion.

Answer:

+2

Explanation:

2 C4H10 + 13 O2 → 8 CO2 + 10 H2O.

Answer:

it's just like doing a test grade on children if you give them different tests they might not come up with the same results, the molecules need to be the same or else the experiment will be even.

Explanation:

whenever water is hot the molecules will bounce really fast in the bottle, whenever water is cold he will go really slow in the bottle

Answer: no

Explanation: theres a chance but generally no because there can be different substances in different amounts which can have similar volumes

Answer:

19.20 g. Explanation: ∵ mass % = [mass of solute/mass of solution] x 100