A substance that allows heat, light, sound, or an electric charge to run through it is called a/n

Nuclear modifications are alterations that take place inside an atom's nucleus. The amount of protons and neutrons in the nucleus may change, and this is the most fundamental degree of change that can take place in a material.

The atom is considered to have experienced a nuclear transition and is now a distinct atom when the number of protons or neutrons changes. This is thus because the element is determined by the number of protons, and the element changes if the number of protons varies.

If an atom of uranium contains 92 protons, for instance, it is uranium; nevertheless, if it has 91 protons, it is protactinium. This nuclear shift produces a distinct atom with different properties.

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Answer:

iron #26, Cu #29, and mercury #80 are transition metals

Explanation:

MULTIPLE CHOICE

Question 3

ed

Which elements are transition metals?

Select all that apply.

A

iron

B.

magnesium

с

copper

D

mercury

look at a periodic table

columns 1,2,13,14,15,16, 17, and 18 are the "representative elements'

columns 3-12 are the transition metals

iron #26, Cu #29, and mercury #80 are transition metals

The equilibrium concentration of NO₂ at this temperature is approximately 0.219 M.

To determine the equilibrium concentration of NO₂, we can use the equilibrium constant expression (Kc) and the given equilibrium concentrations of NO and O₂. The equilibrium constant expression for the given reaction is:

Kc = ([NO₂]²) / ([NO]²[O₂])

We are given the equilibrium concentrations of NO and O₂ as [NO] = 0.31 M and [O₂] = 1.10 M, respectively. We need to find the equilibrium concentration of NO₂, denoted as [NO₂].

Using the given equilibrium concentrations and the equilibrium constant expression, we can rearrange the equation and solve for [NO₂]:

Kc = ([NO₂]²) / ([NO]²[O₂])

0.50 = ([NO₂]²) / ((0.31 M)²(1.10 M))

0.50 = ([NO₂]²) / (0.0961 M³)

Multiplying both sides by 0.0961 M³, we have:

0.04805 M³ = [NO₂]²

Taking the square root of both sides, we find:

[NO₂] = √(0.04805 M³)

[NO₂] ≈ 0.219 M

Therefore, the equilibrium concentration of NO₂ at this temperature is approximately 0.219 M.

It's important to note that the units of concentration (M) were used throughout the calculations, and the answer is rounded to three significant figures based on the given data.

Additionally, the negative sign of the enthalpy change (AH) indicates an exothermic reaction, and the equilibrium constant (K) of 0.50 suggests that the reaction favors the products, as the concentration of NO₂ is greater at equilibrium.

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Cells cannot be as large as a cube because the surface area to volume ratio decreases as cell size increases.

What are cells?

The cell is the fundamental structural and functional unit of all living things. Every cell is made up of cytoplasm surrounded by a membrane that includes several biomolecules such as proteins and nucleic acids.

Cells cannot be as large as a cube because the surface area to volume ratio decreases as cell size increases. As a result, if the cell develops beyond a certain point, the cell contents will be unable to cross the cellular membrane as quickly in order to accommodate the increased cellular volume.

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In this letter, express gratitude to your uncle, a university professor, for his invitation and congratulate him on his achievements.

Here are the steps to be followed:

By following these steps, you can write a thoughtful and appreciative letter to your uncle, expressing your gratitude for his invitation and congratulating him on his achievements.

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Answer:

true

Explanation:

Answer:

Nonmetallic elements form ions by gaining valence electrons to complete their outer shell.

The more valence electrons an element has in its outer shell, the easier it is to complete.

The fewer electron shells an element has, the easier it is to fill its outermost shell.

Reactivity in nonmetals increases as you go from left to right in a group, and

decreases as you go from top to bottom.

Explanation:

Nonmetallic elements form ions by gaining valence electrons to complete

their outer shell.

The more valence electrons an element has in its outer shell, the easier it is to complete.

The fewer electron shells an element has, the easier it is to fill its outermost shell.

Reactivity in nonmetals increases as you go from left to right in a group, and decreases as you go from top to bottom.

When there are more valence electrons then it makes it easy for the element

to complete its outermost shell as against if it was less as it would be harder

due to a bigger number of electrons needed.

Non metals are elements which accepts valence electrons to complete its

outermost shell and becomes negatively charged when this happens.

When an element has fewer electron shells then filling the outermost shell

will be easier as the electron shells require a lesser number of electrons and

increases as the number of shells increases.

This is because the tendency to accept electrons increases from left to right

and decreases down the group.

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Answer:

The awnser is C. Hope that helps!!!

The birth weight of cats at the 90th percentile would be approximately 3.7 ounces. b. The birth weight of cats at the 10th percentile would be approximately 2.3 ounces.

There are three main methods of calculating weight:

1. Balance Beam Scale: A balance beam scale is an example of a mechanical weighing system. It uses a set of calibrated weights to measure the weight of an object.

2. Digital Scale: A digital scale uses an electronic or digital readout to display the weight of an object.

3. Calipers: Calipers are devices used to measure the distance between two points, such as thickness or diameter. They come in various sizes and shapes, depending on the type of measurement the user wants to take.

Birth weight is the weight of a baby at the time of birth. It is usually measured soon after delivery, with a special baby scale, though sometimes the baby's weight is estimated. The normal range of birth weight is anywhere between 5 lbs 8 oz and 10 lbs, though preterm or premature babies may be significantly lighter. A baby's birth weight is important because it can provide a clue to the baby's overall health. High birth weights may indicate an underlying medical condition, and low birth weights can be a sign of premature or difficult delivery and health risks associated with such a delivery.

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Answer:

I think it just h sur rn of sb

The equilibrium constant for the system at this temperature is\(1.17 × 10^-31 mol^2/L^2\).

For the chemical equation:

N2(g) + O2(g) ⇌ 2NO(g)

The equilibrium mixture at a temperature of 1500 K is determined to contain 6.4 × 10^-3 mol/L of N2,\(1.7 × 10^-3\)mol/L of O2 and 1.1 × 10^-5 mol/L of NO.  First, we need to calculate the concentration of N2 and O2 required to produce

1.1 × 10^-5 mol/L of NO:

2NO(g) = N2(g) + O2(g)

Given that there are 1.1 × 10^-5 mol/L of NO, the number of moles of N2 and O2 are equal since the stoichiometric ratio is 1:1. Therefore:

\(1.1 × 10^-5 mol/L\) = [N2][O2]Kc = \(([NO]^2)/([N2][O2])Kc\)= \((1.1 × 10^-5 mol/L)^2/(6.4 × 10^-3 mol/L)(1.7 × 10^-3 mol/L)Kc\) =

1.17 × 10^-31 mol^2/L^2.

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Answer:

Xylitol

Please give me the brainliest if you found this helpful

The sample containing 1.00 mg of iodine-129 would have an activity of 1900 disintegrations per second.

The first step in solving this problem is to determine the number of iodine-129 atoms present in 1.00 mg of the sample. We can use the Avogadro's number (6.022 × 10^23 atoms per mole) and the molar mass of iodine-129 (129 g/mol) to calculate this:

Number of iodine-129 atoms = (1.00 mg / 129 g/mol) x (6.022 × 10^23 atoms/mol)

= 4.66 × 10^16 atoms

Next, we can use the half-life of iodine-129 (1.7 × 10^7 years) to calculate the decay constant (λ) using the following equation:

λ = ln(2) / half-life

λ = ln(2) / 1.7 × 10^7 years

= 4.09 × 10^-8 per year

Now, we can use the decay constant and the number of iodine-129 atoms to calculate the activity (A) in disintegrations per second (Bq):

A = λ x N

A = (4.09 × 10^-8 per year) x (4.66 × 10^16 atoms)

= 1900 Bq

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Answer: almost 7g

Explanation: 25 grams of carbon dioxide contains 6.818 grams of carbon.

The reaction is:  2NO2(g) + F2 (g) =2NO2F (g)

Let us consider the order of the reaction i.e., a and b with respect to NO2 and F2.

So, the rate Law is: Rate = K [NO2] a [F2] b                                       ------- (i)

Where, K is the rate law constant

Now, for experiment no. 1

Rate = 0.026 = K (0.100) a (0.100) b                                       ----------(ii)

for experiment no. 2

Rate = 0.051 = K (0.200) a (0.100) b                                       ----------(iii)

for experiment no. 3

Rate = 0.103 = K (0.200) a (0.200) b                                       ----------(iv)

for experiment no. 4

Rate = 0.411 = K (0.400) a (0.400) b                                       ----------(v)

Now, dividing equation no. – (ii) by (i), we get

0.026/0.051 = {K (0.100) a (0.100)b} / K (0.200) a (0.100) b

1/2 = (1/2) a

a = 1

Now, dividing equation no. – (iii) by (ii), we get

0.051/0.103 = {K (0.200) a (0.100) b} / K (0.200) a (0.200) b

1/2 = (1/2) b

b = 1

Hence, the rate law expression is –

Rate = K [NO2]1 [F2]1

Rate = K [NO2] [F2]

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Approximately 1.167 grams of the 25% (m/m) NaCl solution would contain 0.250 moles of sodium chloride.

To determine the mass of a 25% (m/m) sodium chloride (NaCl) solution containing 0.250 moles of sodium chloride, we need to consider the concentration and molar mass of NaCl.

The percentage (m/m) concentration indicates the mass of solute (NaCl) present per 100 grams of the solution. Therefore, a 25% (m/m) NaCl solution contains 25 grams of NaCl per 100 grams of the solution.

First, we calculate the mass of NaCl in the given solution:

Mass of NaCl = (25% / 100%) x Mass of solution

= (25 / 100) x Mass of solution

Next, we can determine the mass of the solution required to have 0.250 moles of NaCl using the molar mass of NaCl, which is approximately 58.44 g/mol.

Mass of NaCl = Moles x Molar mass

Mass of solution x (25 / 100) = 0.250 moles x 58.44 g/mol

Now, we can solve for the mass of the solution:

Mass of solution = (0.250 moles x 58.44 g/mol) / (25 / 100)

= 1.167 g

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The word "symptom" refers to a specific manifestation or indication of a condition, disease, or disorder that is experienced or observed by an individual.

Symptoms are subjective or objective changes in the body's normal functioning that may be recognized as abnormal, uncomfortable, or problematic. Symptoms can manifest in various ways depending on the nature of the underlying condition. They can be physical, such as pain, rash, cough, fever, or fatigue, indicating an illness or injury affecting the body. Symptoms can also be psychological, such as anxiety, depression, or confusion, reflecting disturbances in mental health.

Symptoms serve as important clues for medical professionals to identify and diagnose diseases or disorders. They provide valuable information about the nature, severity, and progression of an illness, helping healthcare providers formulate appropriate treatment plans. Additionally, symptoms may also be important for individuals to self-assess their own health status and seek appropriate medical attention.

It is essential to note that symptoms alone may not provide a definitive diagnosis, as they can overlap across different conditions. Further evaluation, including medical tests and examinations, is often necessary to confirm a diagnosis and determine the appropriate course of action.

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The grams of magnesium hydroxide needed to yield 8.00 moles of magnesium chlorate is approximately 466.64 g. None of the options provided match the calculated value of 466.64 g.

To determine the grams of magnesium hydroxide (Mg(OH)2) needed to yield 8.00 moles of magnesium chlorate (Mg(ClO3)2), we need to consider the balanced chemical equation for the reaction between magnesium hydroxide and chlorine.

The balanced equation is as follows:

2 Mg(OH)2 + 6 Cl2 → 2 Mg(ClO3)2 + 2 H2O

From the balanced equation, we can see that 2 moles of Mg(OH)2 react with 6 moles of Cl2 to produce 2 moles of Mg(ClO3)2.

Therefore, the stoichiometric ratio is 2 moles of Mg(OH)2 : 2 moles of Mg(ClO3)2.

To calculate the grams of Mg(OH)2 needed, we can use the stoichiometric ratio and the given moles of Mg(ClO3)2.

Given:

Moles of Mg(ClO3)2 = 8.00 moles

Using the stoichiometric ratio, we have:

8.00 moles Mg(ClO3)2 × (2 moles Mg(OH)2 / 2 moles Mg(ClO3)2) = 8.00 moles Mg(OH)2

To convert moles to grams, we need to multiply by the molar mass of Mg(OH)2.

The molar mass of Mg(OH)2 = (24.31 g/mol) + (2 * 16.00 g/mol) = 58.33 g/mol

Grams of Mg(OH)2 = 8.00 moles Mg(OH)2 × 58.33 g/mol = 466.64 g

Therefore, the grams of magnesium hydroxide needed to yield 8.00 moles of magnesium chlorate is approximately 466.64 g.

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Answer:

C

Explanation:

According to the activity series, Li can displace Zn to give LiCO3

Height of a mountain is 5348.9 meter.

1 kilometer is equal to 1000 meter.

The meter, symbol m, is the primary unit of period in the international system of gadgets, although its prefixed paperwork also are used relatively regularly.

A meter is a general metric unit identical to about three feet 3 inches. This means that a meter is part of the metric gadget of dimension. Guitars, baseball bats, and backyard sticks are examples of items which might be approximately one meter lengthy. Meters also are used to measure distances in races, inclusive of strolling and swimming.

Meter readings tell power suppliers how a lot gasoline and energy you are the use of. In case you do not give your provider meter readings they may have to guess your usage. You typically turn out to be paying too much or too little while this occurs.

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Answer:

changes like leaves turning color in the fall are chemical changes. They involve chemical reactions. Bonds break in chemicals and new bonds form. Substances change into new chemical compounds.

Explanation:

Sodium carbonate, also known as washing soda or soda ash, has a wide range of applications. Sodium carbonate can be naturally occurring or synthetically produced through various methods, including the Solvay process, which is the most common method of industrial production.

Sodium carbonate, also known as washing soda or soda ash, has many uses, including:

1) Cleaning agent: Sodium carbonate is an effective cleaning agent due to its alkaline nature. It is used in laundry detergents and household cleaners to remove stains and grease from clothes and surfaces.

2) Industrial applications: Sodium carbonate is used in a variety of industrial applications. It is used in the production of glass, pulp and paper, and soaps and detergents. It is also used as a water softener and pH regulator in chemical processes.

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The total kilojoules in two tablespoons is  836.8 kJ.

To determine the total kilojoules in two tablespoons of a substance, we need to know the specific substance and its energy content per tablespoon. Different substances have different energy values, so without this information, it is not possible to provide an accurate calculation.

The energy content of food or substances is typically measured in kilocalories (kcal) or kilojoules (kJ). 1 kilocalorie is equal to 4.184 kilojoules. The energy content of a substance is often listed on food labels or in nutritional databases.

For example, if we have the energy content of a substance as 100 kilocalories (kcal) per tablespoon, we can convert it to kilojoules by multiplying it by 4.184:

100 kcal * 4.184 kJ/kcal = 418.4 kJ

So, if we have two tablespoons of this substance, the total energy would be:

418.4 kJ/tablespoon * 2 tablespoons = 836.8 kJ

It's important to note that the energy content of a substance can vary depending on its composition, density, and other factors. Therefore, it is always recommended to refer to reliable sources such as food labels, nutritional databases, or consult a qualified professional to obtain accurate information regarding the energy content of specific substances.

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Answer:

Explanation:

Here, we want to get the number of moles in the given number of molecules

Mathematically, we have that as follows:

The number of moles in the given number of molecules would be:

Never mind, I did the problem wrong, I deeply apologize.

There are 0.2514 moles present in 40.0 grams of Cu2S.

The molar mass of Cu2S (copper(II) sulfide) can be calculated by adding the atomic masses of its constituent elements:

Molar mass of Cu2S = 2 * Atomic mass of Cu + 1 * Atomic mass of S

= 2 * 63.55 g/mol + 32.07 g/mol

= 159.17 g/mol

Now, using the given mass and the molar mass, you can calculate the number of moles:

Number of moles = Given mass / Molar mass

= 40.0 g / 159.17 g/mol

= 0.2514 moles

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Holonium and Gadolinium has the highest number of neutrons in the nucleus.

Looking at the atoms listed;

Then,

Number of neutrons = Mass number - number of protons

157 - 66 = 91 neutrons

162 - 67 = 95 neutrons

149 - 60 = 89 neutrons

148 - 63 = 85 neutrons

159 - 64 = 95 neutrons

Hence, Holonium and Gadolinium has the highest number of neutrons in the nucleus.

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