What directions do periods go on a periodic table

Answer:

I believe it is Mercury (II) oxide

hope this helps

The specific heat of the metal is approximately 0.169 J/g·°C.

To determine the specific heat of the metal, we can use the formula:

q = m * c * ΔT

where q is the heat energy absorbed by the metal, m is the mass of the metal, c is the specific heat of the metal, and ΔT is the change in temperature.

In this case, we have a mass of 25.0 g, a temperature change of 6.1 °C, and an energy input of 259 J.

Rearranging the formula, we can solve for c:

c = q / (m * ΔT)

Substituting the given values:

c = 259 J / (25.0 g * 6.1 °C)

c ≈ 0.169 J/g·°C

This value indicates that the metal requires 0.169 Joules of energy to raise the temperature of 1 gram of the metal by 1 degree Celsius. The specific heat value is a characteristic property of the metal and can be used to identify the metal or compare it to known values for different metals.

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Using the given partial derivatives at (2,1), the estimated temperature at (2.03, 0.96) is approximately 139.5°C based on first-order approximation.

To estimate the temperature at the point (2.03, 0.96), we can use a first-order approximation based on the given information. The first step is to use the partial derivatives of temperature, T_x and T_y, at the point (2,1). These derivatives provide the rate of change of temperature with respect to the x and y coordinates.

Given T_x(2,1) = 16 and T_y(2,1) = -15, we can use these values to estimate the change in temperature for small changes in x and y around the point (2,1). Since we want to estimate the temperature at (2.03, 0.96), which is a small change from (2,1), we can approximate the change in temperature as follows:

ΔT = T_x(2,1) * Δx + T_y(2,1) * Δy

Here, Δx = 2.03 - 2 = 0.03 and Δy = 0.96 - 1 = -0.04 (as we are subtracting the coordinates of (2,1) from (2.03, 0.96)).

Substituting the values, we have:

ΔT = 16 * 0.03 + (-15) * (-0.04)

   = 0.48 + 0.6

   = 1.08

Since T(2,1) = 140, we can estimate T(2.03, 0.96) by adding the change in temperature to the initial temperature:

T(2.03, 0.96) ≈ 140 + 1.08

                   = 141.08

Rounding this to the nearest tenth, the estimated temperature at (2.03, 0.96) is approximately 139.5°C.

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Answer:

The shortest wavelength of visible light is 380 nm. Its frequency is 7.89x1014Hz. That will be visible light’s highest frequency.

Explanation:

The equation that represents a single replacement reaction given the various options is 2Al(s) + 6HCl -> 2AlCl₃(aq) + 3H₂O(g) (option 2)

A single replacement reaction, also known as single displacement reaction is a reaction in which elements higher in the electro-chemical series displace or replace elements lower in the electro-chemical series displace from a solution.

The following example illustrates single replacement reaction:

A + BC -> AC + B

From the above reaction, we can see that A has replace/displace B to from AC.

With the above information, we can determine the equation that represents single replacement reaction. Details below:

Equation from the questions:

From the above, we can see that only 2Al(s) + 6HCl -> 2AlCl₃(aq) + 3H₂O(g) conform to single replacement reaction.

Thus, the correct answer to the question is: 2Al(s) + 6HCl -> 2AlCl₃(aq) + 3H₂O(g) (option 2)

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Molarity (M) is a unit of concentration used in chemistry. It is defined as the number of moles of solute dissolved in one liter (L) of solution. The unit of molarity is expressed as moles per liter (mol/L) or M.

Molarity is commonly used to describe the concentration of solutions. It is particularly useful in performing calculations involving chemical reactions, dilutions, and stoichiometry.

Given information,

Moles of solute = 0.6 mol

The volume of solution = 0.250L

The formula of molarity is:

Molarity (M) = Moles of solute / Volume of solution

Molarity (M) = 0.6/0.250

Molarity (M) = 2.4 M

Therefore, the molarity of the solution is 2.4 M.

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the nurse will administer approximately 1 teaspoon (tsp) of the medication.1 teaspoon (tsp) is approximately equal to 5 mL.

To determine the number of teaspoons the nurse should administer, we need to calculate the equivalent volume of 30 mEq of KCL using the provided concentration of 60 mEq/10 mL.

First, we'll find the ratio of milliequivalents (mEq) to milliliters (mL) in the given concentration:

60 mEq / 10 mL = 6 mEq/mL

Next, we can set up a proportion to find the volume (in mL) that corresponds to 30 mEq:

6 mEq/mL = 30 mEq / X mL

To solve for X, we can cross-multiply:

6X = 30 * 1

6X = 30

X = 30 / 6

X = 5 mL

Since the medication cup is marked in teaspoons, we need to convert 5 mL to teaspoons.

1 teaspoon (tsp) is approximately equal to 5 mL.

Therefore, the nurse will administer approximately 1 teaspoon (tsp) of the medication.

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Answer:

D

Explanation:

Erosion is when rocks or sediments are moved around by those means mentioned.

Answer:

ffff

Explanation:

The substance in the image above would be classified as a mixture of elements (option E).

A compound is a substance formed by chemical bonding of two or more elements in definite proportions by weight.

On the other hand, a mixture is made when two or more substances are combined, but they are not combined chemically.

According to this question, an image is shown with two different substances or elements as distinguished by coloration (white and purple). These elements are combined but not chemically bonded, hence, is a mixture.

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True.

The Mass Undergoes change only in ( Solid state to liquid state ) Ice Cube to Water .

Mass changes from mg to litre.

\(\huge\mathfrak\red{hope \: it \: helps}\)

Answer:

Atoms and molecules are matter

Explanation:

Matter is anything that have mass and occupies space

Answer:

V' = 1.75 L

Explanation:

glitterfairy9870

6 hours ago

Chemistry

High School

a balloon containing 1,000L of gas at 50. C and 760 mmHg rises to an altitude where the pressure is 380mmHg and the temperature is 10. C, what is the new volume of the balloon (in L)?

PV/T =P'V'/T'

380 XFIRST, ALWAYS ALWAYS, ALWAYS CHANGE TEMP IN C TO TEMP IN K

50C =50+273K =323K

10C= 10+273 =283

now PV/T =P'V'/T')

so

760 X 1/323 = 380 X V'/283

so

V' =760 X1 X283/(323X380)

V' = 1.75 L

L

Answer: The alkyne

Explanation:

Answer:

the alkyne

Explanation:

Hope it helps u

FOLLOW MY ACCOUNT PLS PLS

The specific heat of the metal is 19.99 J / g·°C

Given,

We are required to find the specific heat of the metal.

Specific Heat Formula

We know that the specific heat of a substance is defined as the amount of heat energy required to raise the temperature of 1 gram of that substance by 1° C.

It is denoted by “C.”From the problem, the heat gained by the water will be equal to the heat lost by the metal. This can be represented by the equation below:

q gained by the water = q lost by the metal where, q = m * C * ∆T

where, m is the mass of the substance , C is the specific heat of the substance , ∆T is the change in temperature of the substance

The heat gained by the water can be calculated as:

q gained by the water = m * C * ∆T= 50.00 g * 4.184 J/g·°C * (20.15 - 12.6)°C= 50.00 g * 4.184 J/g·°C * 7.55°C= 1576.78 J

The heat lost by the metal can be calculated as:

q lost by the metal = m * C * ∆T= 25.00 g * C * (99.0 - 20.15)°C= 25.00 g * C * 78.85°C= 1971.25 C * g * °C

The two equations can be equated to get:

C * 78.85°C = 1576.78 JC = 1576.78 J / 78.85°C= 19.99 J / g·°C

Therefore, the specific heat of the unknown metal is 19.99 J / g·°C.

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The function of a galvanic cell can be affected by the presence of a salt bridge. Salt bridge is important to maintain the electrical neutrality in the galvanic cell. It is a tube that is filled with an inert electrolyte solution that connects the half-cells of an electrochemical cell.

The main function of the salt bridge is to balance the electrical charge that builds up in the half-cells due to the transfer of electrons. The salt bridge usually contains a concentrated solution of a neutral salt such as potassium nitrate (KNO3) or sodium chloride (NaCl).How the function of the galvanic cell is affected if the salt bridge contained a very dilute solution of nano3(aq) is explained as follows:If the salt bridge contained a very dilute solution of nano3(aq), then it would affect the function of the galvanic cell because the electrical charge may not be balanced properly. A very dilute solution of nano3(aq) may not be able to provide enough ions to balance the charge that builds up in the half-cells. This can result in an imbalance of electrical charges in the galvanic cell.
This will lead to the transfer of more than one electron per ion and that would affect the voltage produced by the cell. Hence, the voltage produced by the cell will decrease. Thus, the efficiency of the cell would also decrease due to the insufficient supply of ions.

In conclusion, the function of the galvanic cell would be affected negatively if the salt bridge contains a very dilute solution of nano3(aq). The function of the galvanic cell can be affected if the salt bridge contained a very dilute solution of nano3(aq).

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The given reaction represents a combustion reaction.

In this reaction, the hydrocarbon compound C6H14 reacts with oxygen gas (O2) to form carbon dioxide gas (CO2) and water vapor (H2O). The reactants are a hydrocarbon and oxygen, and the products are carbon dioxide and water.

Combustion reactions are exothermic reactions that involve the reaction of a fuel with oxygen, resulting in the release of heat and light energy.

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Answer:

True

Explanation:

The reason why is because frost is a result of a chemical reaction

Answer:

C. having mass and taking up space

good luck, i hope this helps :)

Trans-1-benzyl-3-phenylcyclopentane is the IUPAC name for the given compound. It is a cyclic hydrocarbon containing a cyclopentane ring that is substituted with benzyl and phenyl groups. The trans isomer of this compound has the benzyl and phenyl groups on opposite sides of the cyclopentane ring.

The structural formula of trans-1-benzyl-3-phenylcyclopentane is as follows:
It can be seen from the structural formula that the benzyl group is attached to the first carbon atom of the cyclopentane ring, whereas the phenyl group is attached to the third carbon atom of the ring. The trans-configuration is indicated by the double bond between the second and third carbon atoms of the cyclopentane ring.

The structural formula can be further simplified as follows:

The structural formula shows that trans-1-benzyl-3-phenylcyclopentane contains a total of 15 carbon atoms and 14 hydrogen atoms.
The structural formula can be used to predict the physical and chemical properties of trans-1-benzyl-3-phenylcyclopentane, such as its melting and boiling points, solubility, reactivity, and so on.

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The peroxide to be 1 M, grams of H₂O₂ is in the 1 mL of hydrogen peroxide solution is 0.034 g.

Given that :

molarity of hydrogen peroxide , H₂O₂ =  1 M

volume of hydrogen peroxide . H₂O₂ = 1 mL = 0.001 L

The molarity expression is given as:

Molarity = number of moles / volumes in L

number of moles of H₂O₂ = molarity × volume

                                           = 1 × 0.001

                                            = 0.001 mol

now, the number of moles is given as :

number of moles = mass / molar mass

mass of H₂O₂ = number of moles × molar mass

                       =  0.001  × 34

                       = 0.034 g

Thus, The peroxide to be 1 M, grams of H₂O₂ is in the 1 mL of hydrogen peroxide solution is 0.034 g.

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A pigment that ran exactly with the solvent front would have no polarity and be the most non-polar of the pigments.

The process of chromatography is used to separate chloroplast pigments. It is a laboratory technique that involves separating a mixture into its individual components. The mixture is dissolved in a mobile phase, which is usually a liquid or gas, and is then passed through a stationary phase. The solvent used to separate chloroplast pigments has two polar groups. This means that it is polar in nature and can dissolve other polar substances.

As the solvent moves through the stationary phase, the individual pigments in the mixture are separated based on their polarity. The pigment that runs exactly with the solvent front would have no polarity and would be the most non-polar of the pigments. This is because it has the least attraction to the polar solvent. The other pigments, which are more polar, would be retained on the stationary phase and would not move as far as the non-polar pigment.

Therefore, the more polar the pigment, the less it will move with the solvent front.

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Answer:

(a) pH=4.0

(b) pH=8.3

Explanation:

Hello there!

In this case, since the pH is understood as the potential of the hydrogen in an aqueous solution, and we can calculate it is as follows:

\(pH=-log([H^+])\)

We simply need to plug in the concentrations on each question as shown below:

(a)

\(pH=-log(1x10^{-4})\\\\pH=4\)

(b)

\(pH=-log(5x10^{-9})\\\\pH=8.3\)

Regards!

The amount of heat released is 122.1 kJ.

To answer this question, we need to use the equation Q = mΔHvap, where Q is the amount of heat released, m is the mass of the steam, and ΔHvap is the heat of vaporization.
First, we need to convert the mass of steam from grams to moles. The molar mass of water is 18.015 g/mol, so 54.0 g of water is 3.00 moles.
Next, we can use the given ΔHvap of 40.7 kJ/mol to calculate the amount of heat released. Q = 3.00 mol x 40.7 kJ/mol = 122.1 kJ.
Therefore, when 54.0 g of steam condenses to a liquid at 100°C, 122.1 kJ of heat is released.
The amount of heat released is 122.1 kJ.

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The continuation of the electron configuration would be \(3p^6, 4S^2, 3d^3\).

The initial p orbital is partially filled. Hence, it has to be completely filled first in order to obey the orbital filling rule. Lower energy orbitals are first filled before higher energy orbitals.

After filling the p orbital with 2 electrons from the remaining 7 electrons, higher energy orbital 4s and 3d can then be filled.

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Answer:

3p^6 4s^2 3d^3

Explanation:

There are 5.66 moles of hydrogen in the sample of talc(hydrated magnesium silicate).

Given,

Talc formula is  \(Mg_{3} Si_4O_{10} (OH)_2\)

moles of magnesium = 8.5 moles

The stoichiometry of magnesium and hydrogen is 3 : 2,

So 3 moles of magnesium is equivalent to 2 moles of hydrogen.

Then 8.5 moles of magnesium is equivalent to \(\frac{2}{3} *8.5\)=5.6666 moles

Talc(hydrated magnesium silicate), often known as talcum, is a type of clay mineral made up of hydrated magnesium silicate, having the formula Mg3Si4O10(OH)2. Baby powder is made of powdered talc, frequently mixed with corn starch. This mineral serves as a lubricant and thickening agent. It serves as a component in paint, pottery, and roofing materials. It serves as a key component in many cosmetics. It can be found as foliated to fibrous aggregates and in a remarkably uncommon crystal form. It is foliated with a two-dimensional platy form, has a flawless basal cleavage, and an irregular flat fracture.

Talc(hydrated magnesium silicate), the softest mineral, is assigned a value of 1 on the Mohs scale of mineral hardness, which is based on scratch hardness comparisons.

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A compound forms a dense yellow precipitate when treated with iodine and sodium hydroxide. the compound must be: Acetophenone methyl ketone.

Sodium hydroxide is every now and then known as caustic soda or lye. it's by far a common ingredient in cleaners and soaps. At room temperature, sodium hydroxide is white, odorless strong. Liquid sodium hydroxide is colorless and has no odor. it could react violently with strong acids and with water.

Sodium hydroxide, also known as lye and caustic soda, is an inorganic compound with the formula NaOH. it is a white stable ionic compound that includes sodium cations Na⁺ and hydroxide anions OH⁻.

Manufacturers may additionally use sodium hydroxide to provide soaps, rayon, paper, products that explode, dyes, and petroleum merchandise. different obligations which can use sodium hydroxide include processing cotton cloth, steel cleaning and processing, oxide coating, electroplating, and electrolytic extraction.

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Answer:

kurissso pogosiposyoo

The statement a stable nucleus has a similar number of protons and neutrons is true about stable isotopes (Option D).

A radioactive isotope can be defined as a chemical element that emits energy in form of different types of radiation such as alpha radiation or beta radiation, which is due they are unstable in normal conditions.

Therefore, with this data, we can see that the radioactive isotopes are unstable and they can emit energy based on diverse types of radioactive emissions such as alpha rays and or beta rays.

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Ethyl alcohol is widely used as a sanitizing agent due to its ability to kill bacteria and viruses effectively.

Ethyl alcohol, also known as ethanol, is a commonly used compound in sanitizing agents due to its potent antimicrobial properties. It has the ability to effectively kill a wide range of bacteria and viruses, making it a valuable ingredient in various disinfectants, hand sanitizers, and surface cleaners.

One of the reasons why ethyl alcohol is widely used as a sanitizing agent is its ability to denature proteins. When applied to a surface or skin, ethyl alcohol disrupts the cell membranes of microorganisms, causing them to break apart and ultimately leading to their inactivation. This denaturing effect makes it an effective tool for sanitizing and disinfecting surfaces, tools, and even hands.

Moreover, ethyl alcohol evaporates quickly, which contributes to its effectiveness as a sanitizing agent. When applied to a surface, the alcohol evaporates rapidly, ensuring that the contact time between the alcohol and the microorganisms is sufficient to kill them. This quick evaporation also minimizes the residual moisture left on surfaces, reducing the risk of microbial growth.

However, it is important to note that pure ethyl alcohol is highly flammable, with a relatively low flash point and autoignition temperature. These properties make it crucial to handle and store ethyl alcohol-based sanitizers with care, keeping them away from open flames or heat sources that could potentially ignite the alcohol vapors.

In conclusion, ethyl alcohol is widely used in sanitizing agents due to its powerful antimicrobial properties, ability to denature proteins, and quick evaporation. However, it is crucial to be aware of its flammability and handle it with caution to ensure safety during its use.

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