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Answer:

Explanation:

A. Tabular form of the formation of the compound formed between X and Y (carbon and oxygen):

| Element | Electronic Configuration |

|---------|-------------------------|

| X       | 1s² 2s² 2p⁶ 3s²        |

| Y       | 1s² 2s² 2p⁶ 3s² 3p⁵   |

B. Formation of the compound:

The compound formed between X and Y is carbon dioxide (CO2). Carbon (X) has an electronic configuration of 1s² 2s² 2p⁶ 3s², and oxygen (Y) has an electronic configuration of 1s² 2s² 2p⁶ 3s² 3p⁵.

Carbon has 4 valence electrons in its outermost energy level, while oxygen has 6 valence electrons in its outermost energy level. In order to achieve stability, carbon needs to gain 4 electrons, while oxygen needs to gain 2 electrons.

To form the compound CO2, carbon will share electrons with two oxygen atoms. Carbon will share 2 electrons with each oxygen atom, resulting in a double bond between carbon and each oxygen atom.

The formation of the compound can be represented as follows:

O = C = O

2. Drawing the formation of the compound:

In text format, the formation of the compound CO2 can be represented as:

     O

    //

   C

    \\

     O

Here, the central carbon atom (C) is bonded to two oxygen atoms (O) through double bonds. The structure of carbon dioxide is linear, with the carbon atom in the center and the oxygen atoms on either side.

Answer:

another name for groups of elements is family.

Answer: The Periodic Table of Elements

Explanation: The Periodic Table of Elements is a table with different elements arranged in an order, usually in vertical rows of two.

Answer:

the Coriolis effect

Explanation:

the Coriolis effect is a pattern of deflection responsible for this pattern of movement. since the earth rotates on it's axis, circulating air is deflected.

Answer: The Coriolis effect (make the other guy brainlyest he said it first)

Explanation:

The volume of 0.182 M NaOH solution required to neutralize 26.1 mL of 0.278 M HClO4 solution is 40 mL.

To calculate the volume of 0.182 M sodium hydroxide solution required to neutralize 26.1 mL of 0.278 M perchloric acid solution, we need to use the concept of acid-base titration.

The balanced chemical equation for the reaction between NaOH and HClO4 is:

NaOH + HClO₄ → NaClO₄ + H₂O

We can see from the equation that one mole of NaOH reacts with one mole of HClO₄. Thus, the number of moles of HClO₄ in 26.1 mL of 0.278 M HClO₄solution is given by:

moles of HClO₄ = Molarity × Volume (in L)

moles of HClO₄ = 0.278 mol/L × 26.1 mL/1000 mL/L

moles of HClO₄  = 0.0072618 mol

Now, we can calculate the volume of 0.182 M NaOH solution required to neutralize 0.0072618 mol of HClO₄. Again, using the mole ratio from the balanced chemical equation, we have:

moles of NaOH = moles of HClO₄

moles of NaOH = 0.0072618 mol

Volume (in L) of 0.182 M NaOH solution = moles of NaOH / Molarity of NaOH

Volume (in L) of 0.182 M NaOH solution = 0.0072618 mol / 0.182 mol/L

Volume (in L) of 0.182 M NaOH solution = 0.04 L or 40 mL

Therefore, the volume of 0.182 M NaOH  is 40 mL.

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The actual free energy (∆G) of ATP hydrolysis in the cell differs from the standard free energy (∆G'°) due to variations in concentration, pH, temperature, and coupling to other reactions in the cellular environment.

The actual free energy (∆G) of hydrolysis of ATP in the cell is different from the standard free energy (∆G'°) due to several factors.

1. Concentration of reactants and products: ∆G'° is measured under standard conditions, with all reactants and products at 1M concentrations. However, in the cell, the concentrations of ATP, ADP, and inorganic phosphate (Pi) are different from these standard concentrations, which affects the actual ∆G.

2. pH and temperature: The standard free energy change (∆G'°) is measured at a specific pH (usually 7) and temperature (usually 25°C). In the cell, the pH and temperature may vary from these standard conditions, which can influence the actual free energy change (∆G).

3. Coupling to other reactions: In the cell, ATP hydrolysis is often coupled to other reactions, either directly or through enzyme-mediated processes. This coupling can cause the actual free energy change of ATP hydrolysis to be different from the standard free energy change.

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The correct statements are that a rock is considered an ore when it contains at least one metallic mineral in sufficient amounts to be extracted profitably and when it contains fluorite or sulfur minerals in sufficient amounts to be extracted profitably.

When it contains at least one metallic mineral in sufficient amounts to be extracted profitably.

When it contains fluorite or sulfur minerals in sufficient amounts to be extracted profitably.

Step-by-step explanation:

When it occurs in sufficient amounts to be used to build roads and buildings: This statement is incorrect. Rocks that are used for construction purposes, such as limestone or sandstone, are not considered ores unless they also contain economically valuable minerals.

Only when it contains lead: This statement is incorrect. Ores are not limited to containing only lead. Ores can contain various metallic minerals, not just lead.

When it contains at least one metallic mineral in sufficient amounts to be extracted profitably: This statement is correct. Ores are rocks that contain valuable metallic minerals in concentrations that make extraction economically feasible. These minerals can include gold, silver, copper, aluminum, zinc, and many others.

Only when it contains iron: This statement is incorrect. While iron ores are commonly known and widely used, ores are not limited to containing only iron. There are numerous other metallic minerals that can be extracted profitably from rocks.

When it contains fluorite or sulfur minerals in sufficient amounts to be extracted profitably: This statement is correct. Fluorite and sulfur are examples of non-metallic minerals that can be extracted profitably from rocks, and if a rock contains these minerals in sufficient quantities, it can be considered an ore.

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Answer:

it will dilute to its natrual state. so c

Explanation:

If we know how many moles of hypochlorite were initially present, we may calculate how much hypochlorite was present in the bleach sample. When the reaction is finished, the amount of thiosulfate added equals double that amount. \($ \mathrm{I}_2+2 \mathrm{~S}_2 \mathrm{O}_3^{2-}- > 2 \mathrm{I}^{-}+\mathrm{S}_4 \mathrm{O}_6^{2-}\)

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The molar concentration of a 12% sodium chloride solution is approximately 2.05 M.

To determine the molar concentration of a 12% sodium chloride solution, we need to convert the given percentage concentration into molarity.

First, we need to understand that the percentage concentration refers to the mass of the solute (sodium chloride) relative to the total mass of the solution.

In this case, a 12% sodium chloride solution means that there are 12 grams of sodium chloride in 100 grams of the solution.

To convert this into molar concentration, we need to consider the molar mass of sodium chloride, which is 58.5 g/mol.

We can start by calculating the number of moles of sodium chloride in 12 grams:

Moles of sodium chloride = mass of sodium chloride / molar mass of sodium chloride

Moles of sodium chloride = 12 g / 58.5 g/mol = 0.205 moles

Next, we calculate the volume of the solution in liters using the density of the solution. Since the density is not provided, we assume a density of 1 g/mL for simplicity:

Volume of solution = mass of solution / density

Volume of solution = 100 g / 1 g/mL = 100 mL = 0.1 L

Finally, we calculate the molar concentration (Molarity) by dividing the number of moles by the volume in liters:

Molar concentration = moles of solute / volume of solution

Molar concentration = 0.205 moles / 0.1 L = 2.05 M

Therefore, the molar concentration of a 12% sodium chloride solution is approximately 2.05 M.


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The time taken for the decay rate to fall to 2.5×10³, given that the sample has a half-life of 1.83 hours is

We'll begin by obtaining the number of half lives that has passed during the decay. Details below

2ⁿ = A₀ / A

2ⁿ = 1.5×10⁵ / 2.5×10³

2ⁿ = 60

Take the log of both sides

Log 2ⁿ = log 60

nLog2 = log 60

Divide both sides by log 2

n = log 60 / log 2

n = 5.907

Finally, we shall determine the time taken. Details below

n = t / t½

5.907 = t / 1.83

Cross multiply

t = 5.907 × 1.83

t = 10.81 hours

Thus, the time taken is 10.81 hours

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To create this solution, 0.450 moles of sodium hydroxide are required.

The mole is the amount of stuff in a system that has as many elementary entities as there are atoms in 0.012 kilogram of carbon 12; its symbol is "mol". A mole is the mass of a material containing 6.023 x 1023 particles of that substance. The mole is the SI unit of material quantity. It is represented by the symbol mol. 1 mol of carbon-12 has a mass of 12 grams and a carbon atom count of 6.022140857 x 1023. (to 10 significant figures).

Here,

To find the amount of sodium hydroxide needed to make a 1.8 M solution of 250 ml, we need to multiply the molarity (1.8 M) by the volume (250 ml) and convert the volume to liters.

1.8 M * 0.250 L = 0.450 mol

So, 0.450 moles of sodium hydroxide are needed to make this solution.

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Answer:

b

Explanation:

because the sun it's already the biggest planet

A compound that increases the number of hydronium ions when dissolved in water is known as an acid.

Acids are compounds that donate protons (H+) to water molecules, resulting in the formation of hydronium ions (\(H_3O^+\)). Acids have a sour taste, react with metals to produce hydrogen gas, turn blue litmus paper red, and have a pH lower than 7.The aqueous cation \(H_3O^+\), an oxonium ion type created by protonating water, is known as hydronium in common usage. As an Arrhenius acid dissolves in water, the surrounding water molecules receive a proton from the Arrhenius acid molecules, which is known as a positive hydrogen ion (H+). This is why it is frequently referred to as the positive ion present (\(H_2O\)).

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Answer:

there will a definite decrease in solute solution

Explanation:

acid reaction acting upon negative charge.

The correct abbreviation for each metric unit is:

Kilogram - kg, Milliliter - ml, Kilometer- Km, Meter- m, Millimeter - mm, Centimeter - cm, Gram - g,  Liter - L, and Milligram - mg.

The metric system can be described as a system of measurement that succeeded the decimalized system based on the meter.  Each of the fundamental dimensions can be expressed by a single base unit of measure.

For quantities derived from the base units of the system, units derived from the base units are used such as the square meter being the derived unit for the area, a quantity derived from length.

Metric units can be described as units based on the meter, gram, or second and decimal multiples or sub-multiples of these. The units of the International System of Units (SI). By extension, they involve units of electromagnetism from the CGS units and SI units systems.

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Explanation:

Remember, a hypothesis is an assumption that may only be accepted after been tested.

a. A formal question using chemistry language for this experiment could be;

Among plastic, foam, and paper, which has a better thermal insulating capacity?

b. Hypothesis: Plastic has a better thermal insulating capacity.

c. The Experimental variable is all the different kinds of materials used in cup production.

d. Three important control variables include;

e. Note in other to test your hypothesis, we need to measure the initial and final temperatures in all three kinds of cups.

Answer:

moles = no. of molecules / Avogadro's number

         = 2.26 x 10^33 / 6.022 x 10^23

         = 3752906011

Round to significant figures which is 3 = 3.75 x 10^9 mol

Explanation: The formula for finding how many moles of a substance when given the amount of molecules is: moles = number of molecules / Avogadro's number

The coordination number around the central metal atom in ammonium diaquabis(oxalato)nickelate(II) is 6.

In the given compound, ammonium diaquabis(oxalato)nickelate(II), the nickel (Ni) ion is the central metal atom. The coordination number refers to the number of ligands (atoms or molecules) that are directly bonded to the central metal atom. In this case, there are two oxalate ligands (C₂O₄²⁻) and two water ligands (H₂O) bonded to the nickel ion, resulting in a coordination number of 6.

Each oxalate ligand contributes two oxygen atoms, and each water ligand contributes one oxygen atom, giving a total of six ligands surrounding the central nickel atom.

Therefore, in the compound ammonium diaquabis(oxalato)nickelate(II), the central metal atom has a coordination number of 6.

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Answer:

126.86

Explanation:

Given parameters:

1x - percent abundance = 80%(0.8), mass = 127

2x - percent abundance = 17%(0.17), mass = 126

3x - percent abundance = 3%(0.03) , mass = 128

Unknown:

Average atomic mass = ?

Solution:

The average atomic mass is the average of all isotopes of element. It can be calculated using the expression below;

RAM  = (mass x abundance of 1x) + (mass x abundance of 2x) + (mass x abundance of 3x)

Now insert the parameters and solve;

RAM = (127 x 0.8) + (126 x 0.17) + (128 x 0.03)  = 126.86

Answer:

4.70 grams of NH4Cl is needed to prepare 350 mL of a 0.25 M ammonium chloride solution.

We need approximately 4.68 grams of NH4Cl to prepare a 0.25 M ammonium chloride solution with a volume of 350 mL.

To determine the mass of NH4Cl needed to prepare the solution, we us use the formula:

m=M x V x MM ... (i)

where,

m= mass in grams

M=molarity of solution

MM= molar mass of compound

V= volume in litres

The number of moles of NH4Cl needed can be calculated using:

  Moles = Molarity x Volume ...(ii)

  Moles = 0.25 mol/L x 0.350 L

  Moles = 0.0875 mol

Hence we can replace M x V with number of moles in equation i.

The molar mass of NH4Cl is :

  Molar mass of NH4Cl = (1 x 14.01 g/mol) + (4 x 1.01 g/mol) + (1 x 35.45 g/mol)

  Molar mass of NH4Cl = 53.49 g/mol

We have all the variables

Putting them in equation i.

Hence,

  Mass (g) = Moles x Molar mass

  Mass (g) = 0.0875 mol x 53.49 g/mol

  Mass (g) = 4.68 g

Therefore, you would need approximately 4.68 grams of NH4Cl to prepare a 0.25 M ammonium chloride solution with a volume of 350 mL.

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The balanced equation would be \(16Cr(s) + 3S_8(s) --- > 8Cr_2S_3 (s)\).

A balanced chemical equation will have as many atoms of different elements in the products as in the reactants. In other words, a balanced chemical equation will obey the law of conservation of atoms.

According to the law of conservation of atoms, atoms can neither be created nor destroyed but can be converted from one form to another during the course of chemical reactions.

Following this law, the balanced equation for the reaction would be \(16Cr(s) + 3S_8(s) --- > 8Cr_2S_3 (s)\)

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Answer:

D. the starting subtances

:)

Answer: D. The starting substances !!

Explanation:

Answer:

Substances 1 and 2

Explanation:

an element only has 1 kind of atoms :3

Answer:

i have no clu but if u eat tide pods it will have a affect

Explanation:

all seriously i think it needs to be a diff substand not sodium chlotide

see wat i did with the joke cuz its chlotide-tide yk u get it heh heh

Answer: Magnet

Explanation:Using a magnet is the best separating technique to be deployed in this case. The nails are easily picked out by just holding a magnet over the sandbox.

The molar ratio of NaOH:\(KHC_{8}H_{4}O_{4}\) after titration is 1:1.

How to find the molar ratio of compounds during titration?

Potassium hydrogen phthalate (KHP, \(KHC_{8}H_{4}O_{4}\)) is also a good primary standard. 20 mL of NaOH was titrated with 0.600 M \(KHC_{8}H_{4}O_{4}\) solution. The data were graphed and the equivalence point was found when 15.5 mL of the standard 0.600 M KHP solution was added.

The reaction equation is:

NaOH (aq) + \(KHC_{8}H_{4}O_{4}\)(aq) --> \(KNaC_{8}H_{4}O_{4}\)(aq) + \(H_{2}O\)(l).

Let's find the moles of NaOH first.

Molarity = moles/volume

Moles = molarity x volume

Moles of NaOH = 0.6 mol/L × 0.02 L = 0.012 mol \(KHC_{8}H_{4}O_{4}\)

and NaOH are present in equal amounts according to the balanced equation.

i.e, Moles of NaOH = moles of \(KHC_{8}H_{4}O_{4}\)

0.012 mol of \(KHC_{8}H_{4}O_{4}\) was used in the titration since 15.5 mL of a 0.6 mol/L \(KHC_{8}H_{4}O_{4}\) solution was required to reach the equivalence point.

The molar ratio of NaOH: \(KHC_{8}H_{4}O_{4}\) is 1:1 since they are present in the same quantity in the reaction.

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Answer:

thermal energy is used to heat water, which is pumped through a system of pipes and radiators. a warm-air heating system burns fuel in a furnace to produce thermal energy.