A Z isomer has its highest priority substituents on {{c1::the same side}} of the double bond

Answer:

Insulator

Explanation:

An eraser can't conduct electricity, which makes it an insulator.

Answer:

In solid the molecules are soo close so tht cant move and also have bonds but in liquid molecules are far and move so thats y liquid don has its own shape

Answer:

In solid the molecules are soo close so tht cant move and also have bonds but in liquid molecules are far and move so thats y liquid don has its own shape

Explanation:

Answer: The answer is 18.01528.

I assume you are converting between grams H2O and mole.1 grams H2O is equal to 0.055508435061792 mole.

Explanation:

Answer:

In biology and medical research, the term "titre" refers to the concentration of a substance in a solution, usually expressed as the highest dilution or concentration at which a specific reaction occurs.

The term "consistent titres" generally refers to the reproducibility of titration results. It means that when a substance is repeatedly tested using the same method, the resulting titres are very similar or identical.

Consistent titres are important in many areas of biology and medicine, particularly in the diagnosis and monitoring of diseases. For example, when testing for antibodies against a particular virus or bacterium in a patient's blood sample, consistent titres over time can help indicate the progress of the disease or the effectiveness of treatment.

Overall, consistent titres are an important aspect of accurate and reliable experimental results, and they can provide valuable information in various fields of research.

Answer:

18.01528 g/mol

Explanation:

Using the equation to figure this out

Answer:

18.01528 g/mol

The valur of energy of formation ΔGf of H₂O is -228.6 kJ/mol.

ΔG of any reaction will be calculated as:

ΔG = Sum of ΔG of products - Sum of ΔG of reactants

Given chemical reaction is:

4NH₃(g) + 5O₂(g) → 4NO(g) + 6H₂O(g)

For this reaction, ΔG will be calculated as:

ΔG = [ΔGf 4(NO) + ΔGf 6(H₂O)] - [ΔGf 4(NH₃) + ΔGf 5(O₂)]

Given that:

ΔG = -957.9 kJ

ΔGf of NH₃ = -16.66 kJ/mol

ΔGf of NO = 86.71 kJ/mol

ΔGf of O₂ = 0 (because it is present in elemental form)

ΔGf of H₂O = let x (to find)

On putting all these values on the above equation, we get

-957.9 = [4(86.71) + 6(x)] - [4(-16.66) + 5(0)]

-957.9 = 346.84 + 6x + 66.64

6x = -957.9 - 346.84 - 66.64

6x = -1,371.38

x = -228.56 = -228.6 kJ/mol

Hence, correct option is (1) i.e. -228.6 kJ/mol.

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Answer:

A) -228.6 kJ/mol

Explanation:

EDGE 2022

The SL-3 components of the M240B medium machine gun are used for barrel replacement and maintenance.

The SL-3 components of the M240B consist of a spare barrel and a barrel bag. The spare barrel is an essential component for sustained firing and allows for the replacement of a hot or worn-out barrel during extended periods of continuous use. When the barrel becomes overheated, it can negatively impact the weapon's accuracy and potentially cause malfunctions. The spare barrel is designed to be quickly swapped with the hot barrel to ensure optimal performance and prevent damage to the weapon.

The barrel bag is used to safely store the hot or dirty barrel after it has been replaced. It serves as a protective cover to prevent accidental contact and potential burns while the barrel is still hot. Additionally, the bag helps contain any carbon or residue that may be present on the barrel, preventing it from spreading and contaminating other equipment or personnel. The barrel bag is an essential part of the maintenance process, ensuring safe handling and transportation of the replaced barrel until it can be properly cleaned and inspected.

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Explanation:

Electromagnetic waves are waves which can travel through the vacuum of outer space. Electromagnetic waves are created by the vibration of an electric charge. This vibration creates a wave which has both an electric and a magnetic component.

Answer: To me i think it’s “A” because one of the geological processes is

hydrothermal process which I think is also cooling down

Answer:

d = 11400 kg/m³

Explanation:

The density of lead is 11.4 g/cm³

We need to convert the density in kg/m³ in scientific notation.

We know that,

1 kg = 1000 g

1 cm = (1/100) m = 0.01 m

Density,

\(d=11.4\ \dfrac{g}{cm^3}\\\\=11.4\times \dfrac{(\dfrac{1}{1000})\ kg}{(0.01\ m)^3}\\\\=11400\ kg/m^3\)

So, the density of the lead is 11400 kg/m³.

The question is incomplete, the complete question is;

Arrange the following ionic compounds in order of decreasing amount of energy released in lattice formation: NaF, MgS, TlN, and CsI.

Answer:

TlN> MgS > NaF > CsI

Explanation:

Recall that lattice energy is the energy evolved when a crystal lattice is formed from its component ions.

The lattice energy depends on the size of the ions. The smaller the sizes of the ions, the larger the lattice energy.

The order of energy released in lattice formation for these compounds is;

TlN> MgS > NaF > CsI

Answer:

Li2SO4+H2CO3

Explanation:

put d equation this way

negative ions to positive ions

Answer:

it can be increased by the number of atoms on each side

Ranking order of speed of sound is; Steel >Water > Air.

Speed of sound in normal air is 340 m/s, in water the speed is 1,430 m/s and in steel the speed is 5920 m/s.

The speed of sound is the distance travelled per unit of time by a sound wave as it propagates through an elastic medium. The speed of sound in an ideal gas depends only on its temperature and composition. The speed of sound in mathematical notation is conventionally represented by 'c'. The speed of sound is variable and depends on the properties of the substance through which the wave is travelling.

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Answer:

When observing how thallium reacts with the air of the earth's atmosphere, its hardness or resistance resembled sodium, it was not investigated further to classify it correctly

Explanation:

Now it is known that they contain different numbers of valence electrons and that thallium is a heavy metal like lead and that they have similar characteristics except for their melting point where thallium is higher.

Mendeleev might have grouped thallium in the same group as lithium and sodium due to many reasons:

Now it is known that they contain different numbers of valence electrons and that thallium is a heavy metal like lead and that they have similar characteristics except for their melting point where thallium is higher.

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(1a) 3-Chlorophenol is more acidic than cyclopentanol (chlorine atom electron-withdrawal). (1b) Cyclohexanecarboxylic acid is more acidic than cyclohexanol (stronger carboxylic acid group).

(2a) Propan-2-ol is more soluble in water than butan-1-ol and pentan-1-ol (hydrogen bonding ability). (2b) Cyclohexanol is more soluble in water than chlorocyclohexane (hydroxyl group enables hydrogen bonding).

Part 1: Comparing Acidic Strength

a) 3-chlorophenol is more acidic than cyclopentanol. This is because the presence of a chlorine atom in 3-chlorophenol can stabilize the negative charge on the phenoxide ion through inductive and resonance effects, making it more stable and easier to form.

b) Cyclohexanecarboxylic acid is more acidic than cyclohexanol. The carboxylic acid group (-COOH) is a stronger acid functional group compared to the hydroxyl group (-OH) present in cyclohexanol.

c) 2,2-dichlorobutan-1-ol is more acidic than butan-1-ol. The presence of the electron-withdrawing chlorine atoms in 2,2-dichlorobutan-1-ol enhances the acidity by stabilizing the negative charge on the alkoxide ion formed upon deprotonation.

d) Cyclohexanecarboxylic acid is more acidic than cyclohexanol. The carboxylic acid group (-COOH) is a stronger acid functional group compared to the hydroxyl group (-OH) present in cyclohexanol.

Part 2: Comparing Solubility in Water

a) Propan-2-ol is more soluble in water than butan-1-ol and pentan-1-ol. Propan-2-ol has a hydroxyl group (-OH) that can form hydrogen bonds with water molecules, increasing its solubility.

b) Cyclohexanol is more soluble in water than chlorocyclohexane. The presence of the hydroxyl group in cyclohexanol allows for hydrogen bonding with water molecules, enhancing its solubility. Chlorocyclohexane, on the other hand, is nonpolar and lacks the ability to form significant hydrogen bonds with water.

c) Cyclohexanol is more soluble in water than phenol and 4-methylcyclohexanol. Both cyclohexanol and phenol can form hydrogen bonds with water, but phenol's aromatic ring reduces its solubility. 4-methylcyclohexanol is also less soluble than cyclohexanol due to the steric hindrance from the methyl group, which disrupts hydrogen bonding.

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To create 50 grams of sodium sulfate, 28.16 grams of sodium hydroxide are needed.

The International System of Units (SI) defines the gram as a unit of mass that is one thousandth of a kilogram. Another concept connected to mass is the gram.

The amount of matter that makes up a substance or an object is truly measured by its mass. The kilogram (kg) is the fundamental SI unit for mass, but lesser quantities are typically measured in grams (g). You would use a balance or perhaps a scale to measure mass.

According to the answer to the previous question, 80 grams of sodium hydroxide and 142 grams of sulfuric acid react to form sodium sulfate. So the amount of sodium hydroxide needed to make 50 grams of sodium sulfate is as follows:

80 × 50 / 142  = 28.16 grams.

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Geometric isomers have profound effects on the physical properties properties of compounds. one physical property affected by this geometry is the melting point.

The physical property that will affected by the geometrical isomers are the melting point. let us take an example to understand the effect :

the isomers of 1,2 - dichloromethane is the cis 1,2 - dichloromethane and the trans 1,2 - dichloromethane. the table for the melting point and the boiling point is given below as :

isomers              melting point              boiling point

cis                            -80 °C                         60 °C

trans                           - 50 °C                         48 °C

it can easily be concluded from the table that :

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1. 12.992 L

2. 2.42 moles

3. 275.52 L

4. 567.844 g

Given

moles and volume at STP

Required

mass, volume and moles

Solution

Conditions at T 0 ° C and P 1 atm are stated by STP (Standard Temperature and Pressure). At STP, Vm is 22.4 liters / mol.

1. 0.58 moles ammonia :

Volume = 0.58 moles x 22.4 L = 12.992 L

2. 77.5 grams of O₂ :

Moles = 77.5 grams x (1 mol/32 grams) = 2.42

3. 12.3 mole of Bromine gas :

Volume = 12.3 mole   x (22.4 L/1 mole) = 275.52 L

4. 4.8 moles iron(II)chloride :

Mass = 4.48 moles x molar mass ( 126,751 g/mol) = 567.844 g

Answer:

it is a perfectly covalent bond.

Explanation:

When bond is formed between identical atoms, it is a perfectly covalent bond.

Therefore, the 20g of C has more atoms than the 70g of Zn.

To determine which sample has the most atoms, we need to use Avogadro's number, which is the number of atoms in a mole. Avogadro's number is approximately 6.022 x 10^23 atoms/mole.

First, we need to determine how many moles of each substance we have. We can do this by dividing the given mass by the molar mass of the element. The molar mass of carbon (C) is approximately 12 g/mol, and the molar mass of zinc (Zn) is approximately 65 g/mol.

For 20g of C:

moles of C = 20 g / 12 g/mol ≈ 1.67 moles

For 70g of Zn:

moles of Zn = 70 g / 65 g/mol ≈ 1.08 moles

Now, to determine the number of atoms, we can multiply the number of moles by Avogadro's number.

For 20g of C:

number of atoms = 1.67 moles x 6.022 x 10^23 atoms/mole ≈ 1.00 x 10^24 atoms

For 70g of Zn:

number of atoms = 1.08 moles x 6.022 x 10^23 atoms/mole ≈ 6.50 x 10^23 atoms

Therefore, the 20g of C has more atoms than the 70g of Zn.

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The following formula must be used to determine the amount of sodium hypochlorite required to raise the free chlorine level in a 75,000-gallon pool:

Amount of sodium hypochlorite = (Target chlorine level - Current chlorine level) ₓ Pool volume / Sodium hypochlorite strength

For this situation, the objective chlorine level is 5.0 ppm, the ongoing chlorine level is 3.0 ppm, the pool volume is 75,000 gallons, and how about we expect the strength of the sodium hypochlorite to be 12.5%

Connecting these qualities to the recipe, we get:

Amount of sodium hypochlorite = (5.0 ppm - 3.0 ppm) ₓ 75,000 gallons / 12.5%

Simplifying the equation, we get:

Amount of sodium hypochlorite = 2.0 ppm ₓ 75,000 gallons / 12.5%

Amount of sodium hypochlorite = 12,000 fluid ounces

We divide by 128, as there are 128 fluid ounces in a gallon, to convert fluid ounces to gallons:

Amount of sodium hypochlorite = 12,000 fluid ounces / 128 fluid ounces/gallon

Amount of sodium hypochlorite = 93.75 gallons

As a result, in order to raise the free chlorine level in a pool that is 75,000 gallons in size from 3.0 ppm to 5.0 ppm, around 93.75 gallons of sodium hypochlorite would be required.

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The true statement among the following options is: The average rate of a reaction over a period of time can be expressed by dividing the concentration change of any reactant or product by the elapsed time.

The rate of reaction is the speed with which a reactant is consumed or a product is produced in a chemical reaction. It's typically expressed in units of concentration per time. The average rate of a reaction over a period of time can be expressed by dividing the concentration change of any reactant or product by the elapsed time. This is the true statement.

To determine the average rate of the reaction, one can use the formula as given below:

Average Rate of Reaction=Δ Concentration / Δ Time. Where,

Δ is the symbol for "change in." For example, if the concentration of a reactant decreases from 0.10 M to 0.05 M over the course of 10 seconds, the average rate of the reaction would be:-0.05 M / 10 s = -0.005 M/s.

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To infuse the loading dose of magnesium sulfate supplied as 4g in 250mL LR over 20 minutes, you would set the IV pump to an infusion rate of 750 mL/hr.

To calculate the mL/hr rate for infusing a loading dose of magnesium sulfate supplied as 4g in 250mL of LR (Lactated Ringer's) solution over 20 minutes, we need to convert the infusion time to hours and then determine the infusion rate.

First, let's convert the infusion time of 20 minutes to hours:

20 minutes = 20/60 hours = 1/3 hours (since there are 60 minutes in an hour).

Next, we can calculate the mL/hr rate using the following formula:

Infusion rate (mL/hr) = Total volume (mL) / Infusion time (hours)

In this case, the total volume is 250mL, and the infusion time is 1/3 hours.

Infusion rate (mL/hr) = 250mL / (1/3) hours

To divide by a fraction, we can multiply by the reciprocal of the fraction:

Infusion rate (mL/hr) = 250mL * (3/1) hours

Calculating the product:

Infusion rate (mL/hr) = 750mL/hr.

Therefore, to infuse the loading dose of magnesium sulfate supplied as 4g in 250mL LR over 20 minutes, you would set the IV pump to an infusion rate of 750 mL/hr.

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To make 150 mL of 0.5 M sucrose, you need to add 75 grams of sucrose.

This is calculated by multiplying the volume (150 mL) by the molarity (0.5) and then multiplying that by the molecular weight of sucrose (342.3 g/mol). The equation looks like this:

150 mL × 0.5 M × 342.3 g/mol = 75 g sucrose

This is calculated by multiplying the volume of sucrose (150 mL) by the concentration (0.5 M) to get the total moles of sucrose needed, which is then multiplied by the molecular weight of sucrose (342 g/mol) to get the total grams of sucrose needed.

Therefore, 75 grams of sucrose is required to make 150 mL of 0.5 M sucrose.

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Answer:

Atomic mass is never an integer number for several reasons

The statement that correctly describes one of the bulk elements necessary for life is: 3. Carbon (C) has 4 valence electrons and is likely to form covalent bonds.

Carbon is a crucial element for life as it forms the backbone of organic molecules, which are the building blocks of living organisms. In its atomic structure, carbon has six electrons, with four of them located in its outermost energy level, known as the valence electrons. These valence electrons determine how carbon interacts with other atoms to form chemical bonds.

Carbon is unique in that it can form strong covalent bonds with other carbon atoms, creating long chains or rings, which serve as the basis for complex organic molecules. The four valence electrons of carbon allow it to share electrons with other atoms, leading to the formation of stable covalent bonds. These covalent bonds involve the sharing of electron pairs between carbon and other atoms, such as hydrogen, oxygen, nitrogen, and many others.

This ability of carbon to form covalent bonds with a variety of elements is the foundation of organic chemistry, which is the chemistry of life. Carbon-based compounds, also known as organic compounds, include essential molecules like carbohydrates, lipids, proteins, and nucleic acids, which are vital for biological processes.

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Answer: WERE IS THE QUESTION

Explanation: