3 What does litmus do when it is put into sodium hydroxide?​

What Jane should have done differently next time is to show appreciation.

This is referred to the feeling of being grateful for any help rendered. It should be done regardless of being okay with the outcome or not.

In this scenario, Erin gave a polite feedback which Jane wasn't okay with. She should have still shown appreciation rather instead of frowning.

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Answer:

The answer is Yes

Explanation:

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Your classmate says that the farther the two atoms are apart in a bond, the larger the dipole moment will be, this statement is correct.

An enduring attraction between atoms or ions known as a chemical bond is what allows molecules and crystals to form. The bond may be created by the sharing of electrons in covalent bonds or by the electrostatic attraction of two oppositely charged ions, as in ionic bonds.

Chemical bonds are formed when the atoms in a compound's molecule are brought together and kept together by a powerful combining force. Ionic and covalent bonds are the two different kinds of chemical bonding.

Atoms trade or exchange valence electrons to create bonds. The electrons at an atom's outermost energy level, known as valence electrons, have the potential to interact chemically. All chemical bonds are built on valence electrons.

Thus,  the farther the two atoms are apart in a bond, the larger the dipole moment will be, this statement is correct.

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Answer:

option d in all direction

Explanation:

Answer:

Explanations:

The formula for calculating the pH of the solution is given as:

Given that the pH is 2, then;

Hence the concentration of the hydronium ion is 0.01M

Since the pH of the solution is less than 7, hence the solution is acidic

A solution that has many ions in solution and turns pH paper orange is likely to be an acidic solution with a pH between 3 and 5.

The presence of many ions in solution indicates that the solution is likely to be a strong electrolyte, meaning that it contains a high concentration of ions that dissociate completely in water.

This could be due to the presence of a strong acid or a strong salt in the solution. The orange color on the pH paper indicates that the solution has a pH in the acidic range, which is consistent with the high concentration of H+ ions in an acidic solution.

Therefore, the solution can be classified as a strong acidic solution.

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Answer:

How far away the objects are from each other

Answer:

Number of protons

Explanation:

Elements are arranged in the periodic table in an order of increasing number of protons. It's called the proton number or atomic number.

Polysaccharide is a type of carbohydrate (such as glycogen, cellulose, or starch) whose molecules are made up of many sugar molecules bound together.

What purpose does the polysaccharide serve?

In general, polysaccharides serve one of two purposes: they either store energy or sustain structural integrity. Highly compact polymers like starch and glycogen are employed to store energy. In plants and animals, cellulose and chitin, two linear polymers, provide structural support.

What is plant polysaccharide?

More than half of the carbs we consume come from starch, which is the most significant source of carbohydrates in the human diet. Granules of it can be found in plants. Amylose and amylopectin, two polymers, are combined to form starch. 10%–30% amylose and 70%–90% amylopectin make up natural starches.

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Robert A. Millikan's notable contribution to the understanding of electrons was his famous oil drop experiment, conducted between 1909 and 1913.

The experiment allowed him to determine the charge and mass of an individual electron, thereby providing crucial information about the fundamental properties of electrons.

In the oil drop experiment, Millikan observed tiny oil droplets suspended between two charged plates. By applying an electric field and measuring the droplets' motion, he was able to determine the charge on each droplet.

Millikan realized that the charges on the droplets were quantized, meaning they were always multiples of a fundamental unit of charge. This led him to conclude that the fundamental unit of charge was associated with the electron.

Additionally, by carefully measuring the rate at which the droplets fell or rose under the influence of gravity and the electric field, Millikan could determine the mass of the droplets.

By comparing the known properties of the oil used and the measured mass-to-charge ratios, he deduced the mass of an individual electron.

Overall, Millikan's oil drop experiment provided precise measurements of the charge and mass of the electron, which significantly contributed to the understanding of electrons as fundamental particles with specific properties.

His work helped confirm the existence of subatomic particles and provided key insights into the nature of electricity and atomic structure.

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According to the molar concentration, the molarity of the solution before dilution  is 5.5 M.

Molar concentration is defined as a measure by which concentration of chemical substances present in a solution are determined. It is defined in particular reference to solute concentration in a solution . Most commonly used unit for molar concentration is moles/liter.

The molar concentration depends on change in volume of the solution which is mainly due to thermal expansion. Molar concentration is calculated by the formula, molar concentration=mass/ molar mass ×1/volume of solution in liters.

In terms of moles, it's formula is given as molar concentration= number of moles /volume of solution in liters.Substitution in formula M₁V₁=M₂V₂ gives M₁= 0.55×250/25=5.5 M.

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Answer:

Indium

Explanation:

That is Indium (In) which is in same group as Al

1. The concentration of the hydronium ion, [H₃O⁺] is 3.02×10⁻¹⁰ M

2. The concentration of the hydroxide ion, [OH⁻] is 3.31×10⁻⁵ M

The concentration of the hydronium ion, [H₃O⁺], can be obtained as follow:

pH of a solution is given by the following formula:

pH = -Log [H₃O⁺]

Inputting the various parameters, we have

9.52 = -Log [H₃O⁺]

Multiply through by -1

-9.52 = Log [H₃O⁺]

Take the anti-log of -9.52

[H₃O⁺] = Anti-log -9.52

[H₃O⁺] = 3.02×10⁻¹⁰ M

The value of the the hydroxide ion, [OH⁻], can be obtained as follow:

[H₃O⁺] × [OH⁻] = 10¯¹⁴

3.02×10⁻¹⁰ × [OH⁻] = 10¯¹⁴

Divide both side by 3.02×10⁻¹⁰

[OH⁻] = 10¯¹⁴ / 3.02×10⁻¹⁰

[OH⁻] = 3.31×10⁻⁵ M

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The answer is B - The properties of atoms of the same element can be different. This is not a part of Dalton's atomic theory. According to Dalton's atomic theory, all matter is composed of indivisible atoms, compounds form when atoms combine in whole number ratios, and an atom can neither be created nor destroyed.
Your answer: B - The properties of atoms of the same element can be different.

This statement is not a part of Dalton's atomic theory, as according to his theory, atoms of the same element have the same properties.

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Answer: 2.5 moles of Argon, Ar contains 15.055 x 10^23 particles. ✅

Explanation:

To find the number of particles in 2.5 moles of Argon, we can use the Avogadro's number. Avogadro's number is the number of atoms, ions or molecules in one mole of a substance. It is defined as 6.022 x 10^23 particles per mole.

To convert moles to particles, we can multiply the number of moles by Avogadro's number.

2.5 moles x 6.022 x 10^23 particles/mole = 15.055 x 10^23 particles

So, 2.5 moles of Argon, Ar contains 15.055 x 10^23 particles.

Answer:

Compounds are substances composed of two or more elements chemically combined that can be separated into simpler substances only by chemical means. Water, for example, is a compound because pure water is composed of only H2O molecules.

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ANSWER

They are positively charged and move toward an anode

Option C

EXPLANATION

In electrochemical reaction, cation are positively charged. Since they are positively charged, they move toward negatively charged anode

There are two types of reaction which are oxidation and reduction reaction. At oxidation, the positively charged cations move towards the negatively charged anode.

Recall, that like charges attract and unlike charges repel.

Therefore, the correct answer is option C

Approximately\(18.64 mL of 0.550 M\) NaOH is required to completely neutralize 25.00 mL of 0.410 M HCl.

To calculate the volume of \(0.550 M NaOH (aq)\) required to completely neutralize\(25.00 mL of 0.410 M HCl (aq),\) we can use the following equation:
\(M1V1 = M2V2\)

Where M1 is the molarity of the \(NaOH\)solution, V1 is the volume of the \(NaOH\)solution we need to find, \(M2\) is the molarity of the HCl solution, and V2 is the volume of the HCl solution we are given\((25.00 mL).\)
Plugging in the given values, we get:

\((0.550 M) V1 = (0.410 M) (25.00 mL)\)

Solving for V1, we get:

\(V1 = (0.410 M) (25.00 mL) / (0.550 M)\\\)

\(V1 = 19.09 mL\)

Therefore, the volume of \(0.550 M NaOH (aq)\)required to completely neutralize \(25.00 mL of 0.410 M HCl (aq) is 19.09 mL\)(rounded to two decimal places).

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The function y = |x| - 3 is translated 3 units downward from the parent function.

The parent function of y = |x| is the absolute value function. The function y = |x| - 3 is obtained by subtracting 3 from the parent function.

we make a comparison in order to determine the translation of the function, it to the parent function.

In the question,  the translation is in the vertical direction and because  we subtract 3 from the parent function, the graph of y = |x| - 3 is shifted downward by 3 units compared to the parent function y = |x|.

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The nuclear equation for the alpha decay of Uus-294 is

\(^{294}{117} Uus\) →\(^{4}{2}He + ^{290}_{115}Mc\)

To complete the nuclear equation for the alpha decay of Uus-294, we need to determine the missing product.

During alpha decay, the emission of an alpha particle, composed of two protons and two neutrons, leads to the formation of a new nucleus.

The balanced nuclear equation for the alpha decay of Uus-294 can be represented as follows:

\(^{294}{117} Uus\) → \(^{4}{2}He +\)_____(missing product)

In this equation, the atomic number of the missing product must be two less than the atomic number of Uus-294 (117 - 2 = 115), and the mass number of the missing product must be four less than the mass number of Uus-294 (294 - 4 = 290).

Based on this information, the missing product can be identified as:

\(^{290}_{115}Mc\)

Mc stands for Moscovium, which has an atomic number of 115. By subtracting two from the atomic number of Uus, we obtain the atomic number of Mc. The mass number of Mc-290 is obtained by subtracting four from the mass number of Uus-294.

Therefore, the  nuclear equation for the alpha decay of Uus-294 is:

\(^{294}{117} Uus\)→ \(^{4}{2}He + ^{290}_{115}Mc\)

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The complete question is :

Complete this nuclear equation for the alpha decay of Uus-294 by writing a

notation for the missing product:

\(^{204} {117} Uns\)→\(^{4} _{2} He +\)_____

Fluorine (F) is the most reactive nonmetal in period 2. The correct answer is "Fluorine."

Period 2 of the periodic table consists of 8 elements which include Lithium (Li), Beryllium (Be), Boron (B), Carbon (C), Nitrogen (N), Oxygen (O), Fluorine (F), and Neon (Ne).Fluorine is the most electronegative element on the periodic table. Its electronic configuration is 1s2 2s2 2p5.

                                     It has 7 valence electrons which enable it to easily gain 1 electron to form a stable noble gas configuration.Fluorine reacts with almost all other elements to form fluorides because of its high reactivity. Fluorine reacts with all the other elements in Period 2, but it is the most reactive nonmetal.

                                           The other nonmetals in Period 2 are nitrogen, oxygen, and neon. However, their reactivity is not comparable to that of fluorine.

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Answer: The value of \(\Delta H\) is -163 kJZ

Explanation:

The number of moles is defined as the ratio of the mass of a substance to its molar mass. The equation used is:

\(\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}\) ......(1)

We are given:

Given mass of water = 72.0 g

Molar mass of water = 18 g/mol

Putting values in equation 1, we get:

\(\text{Moles of water}=\frac{72.0g}{18g/mol}\\\\\text{Moles of water}=4mol\)

Calculating the heat released for the condensation process:

\(\Delta H=n\times \Delta H_{(vap)}\) ......(2)

where,

\(\Delta H\) = amount of heat released

n = number of moles of water = 4 moles

\(\Delta H_{(vap)}\) = specific heat of vaporization = -40.7 kJ/mol

Negative sign represents the amount of heat released.

Putting values in equation 2:

\(\Delta H=4mol\times (-40.7kJ/mol)=-163kJ\)

Hence, the value of \(\Delta H\) is -163 kJ

The element that forms coordinate bonds with central metals in complex ions is carbon. Coordinate bonds, also known as dative bonds, are formed when one atom donates a pair of electrons to another atom that lacks a complete valence shell.

In the case of complex ions, the central metal ion typically lacks a complete valence shell and can form coordinate bonds with other atoms or ions. Carbon has a unique ability to donate a pair of electrons to the central metal ion, forming a stable complex ion. This ability is due to the electronic configuration of carbon, which has four valence electrons and can donate two of them to form a double bond. This process is commonly observed in coordination chemistry, where the coordination of carbon in complex ions can greatly affect the properties and reactivity of the overall molecule.

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The negatively charged electron in the plum pudding model, however, is smaller than an atom and is negatively charged.

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The downward pressure on the hg in barometer is the same as the pressure of the atmosphere.

The atmospheric pressure or barometric pressure is the force exerted by the air in the atmosphere on the earth's surface.

The atmospheric pressure is caused by air molecules colliding with the surface. The atmospheric pressure at sea level is about 101 kPa and at the cruising altitude of a passenger plane it is 27 kPa.

The atmospheric pressure decrease as the height of a surface above ground level increases.

A barometer is a measuring instrument used to measure the atmospheric pressure or weight of the air, which is useful for making weather predictions.

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A Toxicity Characteristic Leaching Procedure (TCLP) rating indicates that a lamp has successfully passed specific tests concerning its toxicity levels.

These tests are designed to determine whether a particular waste material, such as a lamp, exhibits hazardous characteristics based on the presence and concentration of certain toxic elements, such as mercury, lead, or cadmium.

The TCLP tests involve a simulation of leaching conditions, mimicking the potential release of hazardous elements from the lamp when it is disposed of in a landfill. The procedure includes extracting a sample from the lamp, followed by an analysis of the extract to quantify the concentrations of the target toxic elements.

If the concentrations of these elements are below the established regulatory limits, the lamp receives a TCLP rating, signifying that it is not considered hazardous waste under the Resource Conservation and Recovery Act (RCRA). This classification allows for more straightforward disposal procedures and reduces the environmental risks associated with disposing of the lamp.

In summary, a TCLP rating means that the lamp has passed stringent tests regarding its toxicity levels, ensuring that it poses minimal environmental and health risks when properly disposed.

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Yes, Iron reacts with O2 to give an iron oxide.

When iron comes in contact with oxygen in presence of water it gives ferric oxide, Also known as rust is formed.

The balanced chemical reaction of above is given as follows,

4Fe + 3O2 + x. H2O → 2Fe2O3.xH2O.

A redox commerce between oxygen and iron in a water-rich terrain, similar as largely sticky air, results in the conformation of rust. The rusting of iron is characterised by the conformation of a subcaste of a red, short substance that readily breaks into greasepaint. The rusting process can be stopped or braked down with a fleece of oil painting. A high- quality makeup will also help to decelerate down rusting by keeping humidity from getting to the essence.

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One approach to stop wind erosion is for construction workers to moisten the ground before driving on it or digging.

Wind has the power to transfer little sand grains and other debris kilometres from their original site. It may also remove layers of sediment and dirt off the top of a landscape. By scraping against the surface or shattering into smaller pieces as they travel, the materials carried by the wind degrade the soil while they are deposited in new areas.

Impacts. Economic, health, and environmental costs associated with wind erosion include soil loss, high cleaning costs, absenteeism, transportation delays, sand-blasted crops, and retail losses.

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Answer: It is the number in the upper left (atomic number).

Explanation: The atomic number is normally the number of protons. I hope this helps.

Answer:

The area of a star's atmosphere between its photosphere and corona, such as that of the sun, is referred to as its chromospheric region

3.125g

Explanation

2.4 minutes = 1 half life

so 12 minutes = 5 half lives (12/2.4)

100g/2 = 50g (1 half life)

50g/2 = 25g (2 half lives)

25g/2 = 12.5g (3 half lives)

12.5g/2 = 6.25g (4 half lives)

6.25g/2 = 3.125g (5 half lives)