Balance the Chemical Equation
Pb(OH)2 + HCl ---> H2O + PbCl2

Please help

Explanation:

Potassium oxide is an ionic compound formed by combining potassium and oxygen. It carries the chemical formula K2O. Potassium cannot be found free because it is too reactive. It has valency +1 and combines readily with oxygen atoms forming K2O.

Answer:

The Correct answer is

K+O2------>K2O

balancing it will be

4K+O2----->2K2O

Based on the given information about the hydrolysis of SbCl2 in the lab manual, the correct answer would be: Equilibrium shifts in the reverse direction. Adding HCl decreases the amount of SbCl2 in solution. To establish equilibrium, more reactants are formed. The correct option is option (a).

When HCl is added, it reacts with the water in the solution to form H3O+ and Cl-. The increased concentration of H3O+ ions causes a shift in the equilibrium towards the reverse direction, which means more SbCl2 reacts with H2O to form SbOCl and 2HCl.

This is because the hydrolysis reaction is an acid-base reaction and the addition of more acid (H3O+) will push the equilibrium towards the reactants side to counteract the increase in H+ concentration. Therefore, the equilibrium shifts in the reverse direction.

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In the first structure, the red methyl substituent (CH3) is in the equatorial position.

In the second structure, the red methyl substituent is in the axial position.

In the third structure, the red methyl substituent is in the trans-3 position.

In the fourth structure, the red methyl substituent is in the axial position.

In the fifth structure, the red methyl substituent is in the equatorial position.

In cyclohexane, the ring flip can change the position of the substituents from axial to equatorial and vice versa. The stability of the cyclohexane conformation depends on the position of the substituents, the equatorial position is more stable than the axial position due to fewer steric interactions. In the given structures, the red methyl substituents are in different positions, and the position is described as axial or equatorial.

The position of the substituents in cyclohexane can be trans or cis, and it affects the stability of the conformation.

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Answer:

B and C which are the same

Explanation:

neutral ph which ranges about from 0 to 7 it is about where water is

Answer:

63/16

Explanation:

tanE=  

adjacent

opposite

​  

=  

16

63

​

Answer:

63/16

Explanation:

this for delta math?

Although complete combustion of hydrocarbons produce oxygen and water but its incomplete combustion produces carbon monoxide and carbon but water is still created.

Depending on the amount of oxygen present, hydrocarbon fuels can burn completely or only partially. Complete combustion occurs when there is a sufficient amount of air available. The exothermic interaction between the carbon and hydrogen atoms in the hydrocarbon fuel and the oxygen results in the production of carbon dioxide and water.Energy is released .A contaminant of the atmosphere is carbon dioxide. Other pollutants are produced by incomplete combustion.

Incomplete combustion is when there is insufficient air or oxygen present, incomplete combustion occurs. Carbon monooxide and carbon are created, water is still produced. The amount of energy released is lower than during full combustion.

For instance, the following equation could be used to describe the incomplete combustion of propane:

C₃H₈ + 3O₂ → C + 2CO + 4H₂O

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Answer

Procedure

Considering the following chemical equation, which is already balanced

C₃H₈ + 5O₂ → 3CO₂ + 4H₂O

We assume there is enough oxygen to react with all propane and thus, propane is the limiting reactant

Therefore we use the equation to determine the amount of propane

189.68g CO₂ /

doAnswer:

Explanation:

i  don¨t lf it rigtht but i thnk it C3h8 an a thank u

To calculate the equilibrium constant (K_eq) for the reaction at 298.0 K, we can use the relationship between the standard Gibbs free energy change (∆G°) and the equilibrium constant.

∆G° = -RT ln(K_eq) Where:

∆G° is the standard Gibbs free energy change (-17.09 kJ/mol)

R is the gas constant (8.314 J/(mol·K)) (note the units)

T is the temperature in Kelvin (298.0 K)

ln denotes the natural logarithm

First, we need to convert the given ∆G° value from kJ/mol to J/mol:

∆G° = -17.09 kJ/mol × 1000 J/kJ = -17090 J/mol

Now we can calculate the equilibrium constant:

∆G° = -RT ln(K_eq)

K_eq = e^(-∆G° / (RT))

Plugging in the values:  K_eq = e^(-(-17090 J/mol) / ((8.314 J/(mol·K)) × 298.0 K))

K_eq = e^(17090 / (8.314 × 298.0))

Calculating the expression inside the exponent:

K_eq = e^(72.718)

K_eq ≈ 1.689 × 10^31

Therefore, the equilibrium constant (K_eq) for the given reaction at 298.0 K is approximately 1.689 × 10^31.

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Answer:

(C) Both of these

Explanation:

A beam of electrons has both of these Wave properties and Particle properties.

Explanation:

It suggests that the extranuclear part consists of electrons in specific spherical orbits around the nucleus.

Answer:

Electrolytes, particularly sodium, help the body maintain normal fluid levels in the fluid compartments because the amount of fluid a compartment contains depends on the amount (concentration) of electrolytes in it. If the electrolyte concentration is high, fluid moves into that compartment (a process called osmosis).

Explanation:

Answer:

Electrolytes are minerals in your body that have an electric charge. They are in your blood, urine, tissues, and other body fluids. Electrolytes are important because they help

Balance the amount of water in your body

Balance your body's acid/base (pH) level

Move nutrients into your cells

Move wastes out of your cells

Make sure that your nerves, muscles, the heart, and the brain work the way they should

Sodium, calcium, potassium, chloride, phosphate, and magnesium are all electrolytes. You get them from the foods you eat and the fluids you drink.

The levels of electrolytes in your body can become too low or too high. This can happen when the amount of water in your body changes. The amount of water that you take in should equal the amount you lose. If something upsets this balance, you may have too little water (dehydration) or too much water (overhydration). Some medicines, vomiting, diarrhea, sweating, and liver or kidney problems can all upset your water balance.

Treatment helps you to manage the imbalance. It also involves identifying and treating what caused the imbalance.

You would need roughly 202 ml of water to dissolve 72 grams of salt at 25 degrees Celsius.

The solubility of the compound, salt in water at 25 degrees Celsius is stated to be 357 grams per liter (g/L).

Then we can say that 357 grams of salt can be dissolved in 1 liter (1000 milliliters) of water.

To find out how much water you need to dissolve 72 grams of salt, solve the ratio as

357 g : 1000 mL = 72 g : x mL

Solving for x gives:

x = (72 g × 1000 mL) / 357 g

x = 201.681 mL

If we approximate this value it becomes 202ml

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The hydrogen in heavy water different from hydrogen in normal water as the hydrogen atoms in heavy water have a neutron in the nucleus doubling the mass. Therefore, option A is correct.

The nucleus of each of its two hydrogen atoms contains not only a proton but also a neutron, so-called "heavy water" (D₂O) weighs more. Known as deuterium.

The heavy hydrogen causes subtle differences in heavy water from small increases in boiling and freezing points to a roughly 10% increase in density.

Deuterium differs from the hydrogen found in water known as protium in that each atom of deuterium contains a proton and a neutron, whereas most hydrogen contains only a proton.

Thus, option A is correct.

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The priority should be given to the stat orders, which typically indicate that the tests are urgent and require immediate attention.

The tube that will be drawn first depends on the specific requirements of the tests being performed and the order of priority set by the healthcare facility. In the given options, the tubes commonly associated with the listed tests are:

a. Blue - This tube is typically used for coagulation studies, such as prothrombin time (PT) and activated partial thromboplastin time (aPTT).

b. Green - This tube is commonly used for chemistry tests, including basic metabolic panel (BMP) and liver function tests (LFTs).

c. Lavender - This tube is typically used for complete blood count (CBC) tests, including white blood cell count, red blood cell count, and hemoglobin.

d. Red - This tube is commonly used for serum chemistry tests, including lipid profile and glucose.

To determine which tube should be drawn first, the priority of the requested tests should be considered. In a typical scenario, the order of priority would be:

Blood type and hold (may require a specific tube or blood banking procedures)

CBC

Chemistry panel

Therefore, the tube to be drawn first would be the one associated with the blood type and hold, which is not specified in the options provided.

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The final temperature of the water in heat transfer comes out to be 82°C, between two systems.

To solve this problem, we can use the formula:

Q = m x c x ΔT

where Q is the heat transferred, m is the mass of the water, c is the specific heat capacity of water, and ΔT is the change in temperature.

First, let's calculate the heat transferred from the hotter water to the cooler water:

Q = m x c x ΔT

Q = 100.0 g x 4.184 J/g·°C x (54.0 °C - 100.0 °C)

Q = -19,938.72 J (negative because heat is transferred from the hotter water to the cooler water). The negative sign means that cold water absorbs heat while hot water loses it.

Let's next determine the water's final temperature. We might infer that the cold water absorbs the heat that the hot water loses, therefore:

\(Q_{hot} = -Q_{cold}\)

\(m_{hot} {\times} c {\times} (T_{final} - T_{hot) = -m_{cold} {\times} c {\times} (T_{final} - T_{cold})\)

\((100.0 g) {\times} 4.184 {\times} (T_{final} - 100.0) = -(39.0 g) {\times} 4.184 {\times} (T_{final} - 54.0)\)

\((418.4 {\times} T_{final} - 41840 J) = (-174.456 {\times} T_{final} + 6786.96 J)\)

\((592.856 {\times} T_{final} = 48627.96 J\)

\(T_{final}\) = 82.03 °C

Therefore, the final temperature of the water is 82.0 °C (rounded to 2 significant figures).

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T = 0 degrees Celsius

P = 1 atmosphere

At STP (Standard Temperature and Pressure), the values for temperature and pressure are defined as follows:

Temperature (T): The temperature at STP is 0 degrees Celsius. This is the standard reference temperature used in many scientific calculations.

Pressure (P): The pressure at STP is 1 atmosphere (atm). An atmosphere is a unit of pressure commonly used in the field of chemistry and physics. It is approximately equivalent to 101.3 kilopascals (kPa) or 760 millimeters of mercury (mmHg).

These standardized values of temperature and pressure at STP provide a consistent reference point for comparing and measuring various properties of substances and reactions.

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Answer:

Physical changes occur when the properties of a substance are retained and/or the materials can be recovered after the change. Chemical changes involve the formation of a new substance. Formation of a gas, solid, light, or heat are possible evidence of chemical change.

brainliest???

Answer:

Physical changes occur when the properties of a substance are retained and/or the materials can be recovered after the change.

Explanation:

Ch3ho has a concentration (m) of 1.589 mol/dm3 in a solution.

Given our parameters, 230 ml per liter of solution and a mole of solutes equal?

that: mass/molar mass = moles of solutes

mass = 11.7g.

thus the formula for CH3OH's molar mass is C(12)+H(1*3) +O(16)+1 =32g.

11.7g/32g Equals 0.365 moles of solutes.

Great, now that we have the moles, we can now enjoy the molarity (concentration)

Molarity is equal to 0.365mol/230*10-3, which is 0.365mol/0.230L, or 1.589mol/dm3.

The formula for calculating molarity is molarity = number of moles of solute. litres of the solution. Since the volume of the solution will be measured in litres and the quantity of moles of solute is measured in mol. So, mol L – 1 is the unit of molarity.

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A lithium and copper reagent complex, R2CuLi, where R is an alkyl or aryl, is referred to as a Gilman reagent.

The structure of organobromide or bromomethane is CH3Br. The structure is given above.

The production of carbon-carbon bonds in organic synthesis is accomplished using the Gilman reagent, also known as organocopper compounds. These substances are named after American scientist Henry Gilman, who first described them in the 1930s.

These chemicals are advantageous because they react with organic halides to exchange the halide group for a R group, unlike similar Grignard reagents and organolithium reagents.

Two steps can be used to manufacture the Gilman reagent: First, by mixing alkyl halide in pentane solvent with lithium metal powder. Secondly, by mixing alkyllithium in tetrahydrofuran at 78 °C with copper(I) bromide.

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Answer:

29:Mn,V,Sr

30:Ni,Pd,Cs

31:Cr, Mo, W

32:Sn,Pb,Ti

33:F, P, As

Sorry I was in a rush so it may not be right; so check with this picture to help you out.

The temperature at which the pressure will be equal to 1.75 atm, given that the tank has an initial pressure of 101325 Pa is 257.25 degrees celsius

First, we shall list out the given parameters from the question. This is shown below:

The final temperature can be obtain as follow:

P₁ / T₁ = P₂ / T₂

1 / 303 = 1.75 / T₂

Cross multiply

1 × T₂ = 303 × 1.75

T₂ = 530.25 K

Subtract 273 to obtain answer in degree celsius

T₂ = 530.25 – 273 K

T₂ = 257.25 degrees celsius

Thus, the temperature required is 257.25 degrees celsius

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oxygen, hydrogen, sulfur, iodine, iron, carbon, nitrogen, phosphorus, calcium.

are the answers

Answer:

Column A            \({}\)                                              Column B

1. CaS                   \({}\)                                              Calcium Sulfide

2. CaSO₄            \({}\)                                                Calcium sulfate

3. CaSO₃            \({}\)                                                 Calcium sulfite

Explanation:

1) Calcium sulfide is a compound formed between calcium, Ca, and sulfur, S, with a chemical formula of CaS. It forms cubic crystals similar to rock salt, and smells like rotten eggs

2) Calcium sulfate is a chemical compound consisting of calcium, Ca, and sulfate SO₄. It is found in nature in the hydrated form as the mineral gypsum

3)Calcium sulfite is a chemical compound formed between calcium, Ca and sulfite, SO₃ used to treat water and preserve food.

Answer:

the formula for calcium sulfite is CaSO3

the formula for calcium sulfate is CaSO4

the formula for calcium sulfide is CaS

Explanation:

A disadvantage of disposing of waste polymers through recycling is that

they must first be separated.

Recycling is the process of forming new polymers and compounds as against their disposal .

Recycling involves separating the items into various sections such as paper,

plastic , metal etc. This is because they both undergo different recycling

processes.

The disadvantage of this process is that it's time consuming and also

expensive as a great amount of time and man power is needed to

separate the waste items.

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Answer:

Unless they chemically react with each other, the individual gases in a mixture of gases do not affect each other’s pressure. Each individual gas in a mixture exerts the same pressure that it would exert if it were present alone in the container . The pressure exerted by each individual gas in a mixture is called its partial pressure.

Explanation:

TLC (Thin Layer Chromatography) is a commonly used analytical technique to separate a mixture into its individual components. Each of the solvents given should effectively separate one of the following mixtures by TLC.

Here's the appropriate solvent with the mixture that you would expect to separate well with that solvent:

1. 2-Phenylethanol and acetophenone Methylene chloride is an appropriate solvent for separating 2-phenylethanol and acetophenone.

2. Bromobenzene and p-xylene Hexane is an appropriate solvent for separating bromobenzene and p-xylene.

3. Benzoic acid, 2,4-dinitrobenzoic acid, and 2,4,6-trinitrobenzoic acid Acetone is an appropriate solvent for separating benzoic acid, 2,4-dinitrobenzoic acid, and 2,4,6-trinitrobenzoic acid. Thus, the appropriate solvents are: Mixture Solvent 2-Phenylethanol and acetophenone Methylene chloride Bromobenzene and p-xylene Hexane Benzoic acid, 2,4-dinitrobenzoic acid, and 2,4,6-trinitrobenzoic acid Acetone

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When cobalt(II) carbonate dissolves in water, the equilibrium concentrations of cobalt(II) and carbonate ions are low, and the solubility of cobalt(II) carbonate in water is low as well. Thus, the correct option is c in both cases.

Cobalt(II) carbonate is a chemical compound that is light pink in color. Cobalt(II) carbonate's chemical formula is CoCO₃. When exposed to air, this compound can be oxidized to form cobalt(II) oxide (CoO) and carbon dioxide (CO₂).

In an aqueous solution, cobalt(II) carbonate is slightly soluble. Cobalt(II) carbonate is one of the most important cobalt salts, and it is used in various applications including the manufacture of porcelain, in coloring glass, in electroplating, and as a catalyst.

If cobalt(II) carbonate is dissolved in water, the equilibrium concentrations of cobalt(II) and carbonate ions are low. This means that cobalt(II) carbonate is not very soluble in water, and very little of it dissociates into its component ions in water.

In other words, the amount of cobalt(II) and carbonate ions present in the water when cobalt(II) carbonate is dissolved is low.

On the other hand, the solubility of cobalt(II) carbonate in water is low as well. This means that only a small amount of cobalt(II) carbonate dissolves in water. Therefore, cobalt(II) carbonate is not very soluble in water. Thus, the correct option is c in both cases.

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Answer: A

Happens when familiar things are selectively ignored.

Answer:

302.8K

Explanation:

Using Charles law equation;

V1/T1 = V2/T2

Where;

V1 = initial volume (L)

V2 = final volume (L)

T1 = initial temperature (K)

T2 = final temperature (K)

According to the information provided in this question;

V1 = 545L

V2 = 550L

T1 = 27°C = 27 + 273 = 300K

T2 = ?

Using V1/T1 = V2/T2

545/300 = 550/T2

1.82 = 550/T2

Cross multiply

1.82 T2 = 550

T2 = 550/1.82

T2 = 302.8K