Complete the following statemnts: a. When determining the data for the equilibrium constant, I will use ____ KSCN solution to prepare reaction mixtures, but when determining data for the standard curve, I will use _____ M KSCN b. When determining the data for the standard curve, I will dilute the Fe(NO3)3 solution from M ___ to ___ M before preparing reaction to mixtures, but when determining data for the equilibrium constant I will use the ___ M Fe(NO3)3 solution directly.

Conversion of Ethyne into Ethanol:

The ethanal can be prepared by the ethyne by treating the ethyne with mercuric sulphate in presence of acid. First the mercury attacks on the reactant ethyne and forms a cyclic structure. Then water attacks on this cyclic structure forming a mercury cation. Then by the removal of hydride alcohol forms.

Hydration of Ethyne:

Alkynes readily combine with water in the presence of acid (usually sulfuric acid) and mercury(II) salts (usually the sulfate is used) to form carbonyl compounds, in a process known as Kucherov's reaction. In the case of acetylene (ethyne) the product is acetaldehyde (ethanal), while other alkynes form ketones.

Answer:

C.

Explanation:

Both protons and neutrons are 1 amu while electrons are 1/2000 amu

Explanation:

i found this hope it helps

1) The substances present before the reaction has occurred.

2) The substances formed after the reaction has occurred.

3) A negatively charged ion, typically non-metal, that gains electrons to become stable.

4) A positively charged ion, typically metal, that losses electrons to become stable.

5) A chemical reaction in which the reactants absorb heat energy from the surroundings to form products.

6) A chemical reaction in which the reactants release heat energy into the surroundings to form products.

We should add approximately 600 mg of magnesium sulfate to the one-liter IV solution to achieve the desired concentration.

The first step to convert mEq to milligrams is to know the atomic weight of magnesium, which is 24.3. To get 10 mEq of magnesium ion per liter, we need to add 1,203 milligrams of magnesium sulfate (10 x 24.3 x 2 x 1000 / 1) to a one liter IV solution. Therefore, the answer is 1,203 milligrams of magnesium sulfate should be added to the IV solution. Remember to always round to the nearest whole number in this case, so the answer would be 1,203. The MEW of MgSO₄ is its molecular weight (120) divided by the valence of Mg²⁺ (2). Thus, MEW = 120 / 2 = 60. Next, multiply the desired milliequivalents (10 mEq) by the MEW (60) to obtain the required amount in milligrams: 10 mEq x 60 mg/mEq = 600 mg. Therefore, you should add approximately 600 mg of magnesium sulfate to the one-liter IV solution to achieve the desired concentration.

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The mass of carbon dioxide produced upon the complete combustion of 23.7 L of propane is  44.0352 kg.

The balanced equation for the combustion reaction of propane is: C3H8 + 5O2 → 3CO2 + 4H2O

To find the mass of CO2 produced, we first need to find the mass of propane in the tank. We can do this using the density of liquid propane and the volume of the tank:
mass of propane = density × volume
mass of propane = 0.621 g/mL × 23.7 L × 1000 mL/L
mass of propane = 14717.7 g

Next, we can use the balanced equation to find the moles of propane and carbon dioxide:
moles of propane = mass of propane / molar mass of propane
moles of propane = 14717.7 g / 44.1 g/mol
moles of propane = 333.6 mol

moles of carbon dioxide = moles of propane × (3 mol CO2 / 1 mol C3H8)
moles of carbon dioxide = 333.6 mol × 3 mol CO2 / 1 mol C3H8
moles of carbon dioxide = 1000.8 mol

Finally, we can use the molar mass of carbon dioxide to find the mass of carbon dioxide produced:
mass of carbon dioxide = moles of carbon dioxide × molar mass of carbon dioxide
mass of carbon dioxide = 1000.8 mol × 44.0 g/mol
mass of carbon dioxide = 44035.2 g

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Answer:

diamonds

Explanation:

Diamond does not conduct electricity.  

• A form of carbon in which each of the atom of carbon is joined to four other atoms of carbon, giving rise to a giant covalent composition is a diamond.  

• Due to this, diamond is very robust and exhibits high melting point. Thus, is used to cut tools.  

• Diamond does not conduct electricity, due to the absence of delocalized electrons in the structure.  

Thus, diamond does not conduct electricity. Option d is correct.

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Answer:

the answer is A

Explanation:

I took the test

Salinity of water is the total concentration of the salts present in unit volume of water. Ocean water in regions with high levels of precipitation has higher salinity. Hence option c is correct.

The salinity of sea water is expressed as a salt (in g) to liter of water ratio. Each liter of sea water contains around 35 grams of dissolved salts. It is spelled 35. The usual range of ocean salinity is 33-37 g/L.

There is a lot of rain in some places of the ocean. Freshwater poured to the surface dilutes the seawater, reduces salinity, and hence makes the seawater less dense. Near land, where rivers provide freshwater, seawater may be less saline.

The seawater near Antarctica has a low salinity of little about 34 ppt, and it is as low as 30 ppt in some spots around the Arctic. Regions where, the precipitation is higher have higher salinity in oceans.

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The specific heat of the substance  : c = 0.235 J/g  °C

Given

Heat absorbed by substance = 419.7 J

m = mass = 23.5 g

Δt = Temperature difference : 76 °C

Required

The specific heat

Solution

Heat can be formulated

Q = m.c.Δt

Input the value :

419.7 = 23.5 x c x 76

c = 419.7 : (23.5 x 76)

c = 0.235 J/g  °C

The responding variable refers to the variable that changes as the independent variable is being manipulated. In this case, the responding variable is the number of paper clips attracted by the magnet.

An experiment must include a dependent (responding) variable and an independent variable. As the independent variable is manipulated during the experiment, the dependent (responding) variable changes accordingly.

In this case; the independent variable is temperature while the dependent (responding) variable is the number of paper clips attracted by the magnet.

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The molecular formula of Ascorbic acid is C6H8O6 having the molar mass of 176.14 g/ mole.

Ascorbic acid is known as the chemical name for Vitamin C. Ascorbic acid is commonly found in high concentrations in citrus fruit. This acid is also found in tomatoes, broccoli, and many other fruits and vegetables. Vitamin C is a nutrient of the body needs to form blood vessels, cartilage, muscle and collagen in bones. This vitamin is also vital to the body's healing process.

A molecular formula is defined as a chemical formula of a molecular compound that shows the kinds and numbers of atoms present in a molecule of the compound. This is a way of presenting information about the chemical proportions of atoms that constitute a particular chemical compound or molecule using chemical element symbols and numbers.

A molecule of the ascorbic acid will have a mass of 176.124 atomic mass units.

This is determined by adding 6 X 12.011 for carbon + 8 X 1.008 for hydrogen + 6 X 15.999 for oxygen.

This is equals to the 72.066 for carbon + 8.064 for hydrogen + 95.994 for oxygen. Added together, these equal 176.124 molecular mass.

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Answer: Scientists work independently to form theories about the Earth without sharing d

Scientists work independently to form theories about the Earth without sharing data.

Solar system is defined as the grouping of the eight planets and their moons in orbit around the sun, as well as other smaller bodies like comets, asteroids, and meteoroids.

It can also be defined as the Sun's orbiting objects are confined by gravity to one system.

An orbiting collection of planets, meteors, or other celestial bodies is referred to as a star system.
The Sun, an ordinary star, the planets Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, and Pluto make up our solar system.

Our solar system is referred to as the "solar system" because our Sun is called Sol after the Latin word for Sun, "solis," and because anything related to the Sun is termed "solar."

Thus, scientists work independently to form theories about the Earth without sharing data.

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This is an exothermic reaction because energy is released during the reaction process as 108 kJ of energy are evolved when 1 mole reacts to form product.

When 1 mole reacts to form product according to the given equation, 108 kJ of energy are evolved, which means that energy is being released by the reaction. This release of energy indicates an exothermic reaction as exothermic reaction is a chemical reaction that involves the release of energy.

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Based on the fact that energy is being evolved, this reaction is exothermic.

This reaction is exothermic because energy is released (or "evolved") during the reaction. In exothermic reactions, energy is given off as the reactants transform into products, while in endothermic reactions, energy is absorbed from the surroundings. Since 108 kJ of energy is evolved in this case, it confirms that the reaction is exothermic.

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Answer:

Fuel and oxygen

Explanation: Carbon in the fuel and the oxygen from the air burns.

Answer:

b. combustion reaction

c. displacement reaction

e. Decomposition reaction

f. redox reactions

g. combination reaction

I'm not fully sure about part c but the rest are correct

I hope it helped

Answer:

Atomic weight is weighted average over all naturally occurring isotopes of the element.

In the beta oxidation pathway, which of these is produced when ATP is consumed is CH₃(CH₂)n-₄COCH₂CO-COA

Option A is correct .

Each round of mitochondrial beta-oxidation produces one acetyl CoA molecule, one FAD(2H) molecule, one NADH molecule, and four ATP equivalents. Specific enzymes are required for the metabolism of fatty acids during beta oxidation.

Due to their higher H+ concentration, saturated fats do indeed contain more gross energy. Nonetheless, unsaturated fats are more edible and have higher ingestion rate, and in this manner the metabolizable energy that unsaturated fats give is higher than that given by soaked fats.

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Answer:

The remaining gas is a mixture of argon, neon, krypton, and xenon. Because these elements are chemically very unreactive, chemical means cannot be used to separate them.

Explanation:

Answer:

They're in Group 0 as they have full outer shells meaning they are chemically unreactive as they already have full outer shells meaning they don't want to lose or gain any electrons. Thus, they can't separate during the separation of gases in the air.

Oxygen (O) has a higher first ionization energy than Nitrogen (N).

The first ionization energy is the energy required to remove one electron from an atom in its neutral state. The reason for Oxygen having a higher first ionization energy is that it has one more proton in its nucleus than Nitrogen. This means that the electrons in its outer shell are held more tightly due to the stronger electrostatic attraction between the positively charged nucleus and the negatively charged electrons.

Nitrogen has the electronic configuration of 1s² 2s² 2p³, which means that it has five electrons in its outermost shell. The first ionization energy of nitrogen is 1402.3 kJ/mol. On the other hand, Oxygen has the electronic configuration of 1s² 2s² 2p⁴, which means it has six electrons in its outermost shell. The extra electron in the outer shell of oxygen increases the electrostatic attraction between the positively charged nucleus and negatively charged electrons, making it more difficult to remove an electron from the atom. The first ionization energy of oxygen is 1313.9 kJ/mol, which is higher than that of nitrogen.

Therefore, Oxygen has a higher first ionization energy than Nitrogen due to its greater nuclear charge, resulting in stronger electrostatic attraction between its nucleus and outer electrons.

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The proper order is Na > Mg > Si > P > Ar. As a result of the valence electrons' low nucleostatic attraction, sodium (Na) has the biggest atomic radius.

The electrons' orbitals get bigger and bigger as we go from top to bottom, increasing the atomic size.S and Ar are hence real. S is the largest element on the periodic table since it is on the left. Na has the most atoms of any of the other elements mentioned. Due to its position to the right of silicon, phosphorus will have a lower atomic radius for an uncharged atom than silicon. Due to its position to the right of silicon, phosphorus will have a lower atomic radius for an uncharged atom than silicon. The atomic radius grows in a group from top to bottom and decreases across a period, as seen in the figures below. The smallest element is therefore helium, whereas the largest is francium.

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The amino acid that is not glucogenic among the options provided is leucine (option e). Leucine is one of the branched-chain amino acids (BCAAs) and is primarily ketogenic, meaning it is metabolized to produce ketone bodies rather than glucose.

The remaining options (alanine, aspartate, glutamate, and glycine) are all glucogenic amino acids, meaning they can be converted into intermediates of glucose metabolism.

Among the amino acids you listed, leucine (option e) is the only one that is not glucogenic. Leucine is a branched-chain amino acid (BCAA) that undergoes primarily ketogenic metabolism, meaning it is primarily converted into acetyl-CoA and acetoacetate, leading to the production of ketone bodies. It does not contribute significantly to glucose production.

On the other hand, alanine (option a), aspartate (option b), glutamate (option c), and glycine (option d) are all glucogenic amino acids. They can be converted into intermediates of glucose metabolism, such as pyruvate, oxaloacetate, and glyceraldehyde-3-phosphate, which can enter the gluconeogenic pathway to produce glucose.

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Answer:

The outer shells of non metal atoms gain electrons when they form ions this result in the formation of negative ions

Answer:

used in irrigation to transfer water over a barrier

Explanation:

I think its boron because boron is no. 5 on the periodic table, and it has a two energy levels with three valence electrons

Boron is the element which has three valence electrons and  two energy levels.

Electrons present in an atom revolve in different orbits which are stationary states and are also called as energy levels. The energy levels are numbered as integers which are also called as principal quantum numbers.

Energy of the stationary state is given as E= -R

1/n² where R

is the Rydberg's constant. When an electron is excited, and it moves from lower to higher energy levels there is absorption of energy, while when it moves from higher energy level to lower energy level it radiates or gives out energy in the form of radiation.

They can also be defined as the distances between electron and nucleus of an atom . Electrons present in K energy level have least energy .Energy level diagrams are studied to understand nature of bonding , placement of electrons in orbits and and elemental behavior under certain conditions.

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Answer:

The volume of hydrogen gas produced is 0.104 L or 104 mL

Explanation:

In the electrolysis of dilute sulphuric acid, hydrogen gas is produced at the cathode while oxygen gas is given off at the anode in a ratio of 2:1.

At the cathode, the half reaction occurring is given as: 4H⁺(aq) + 4e⁻ ---> 2H₂(g)

From the equation of reaction, four moles of electrons are required to produce 2 moles of hydrogen gas at the cathode. Therefore, 2 moles of electrons will produce 1 mole of hydrogen gas.

1 mole of electron = 1 F = 96500 C

2 moles of electron = 193000 C

During the electrolysis experiment above, quantity of charged used, q = current(A) * time (s)

Q = 1 * 15 * 60 = 900 C

193000 C (2 moles of electron)of electricity produces 1 mole of hydrogen gas

900 C of electricity will produce 900 * 1 mole /193000 of hydrogen = 0.00466 moles of hydrogen

Molar volume of a gas at STP = 22.4 L

0.00466 moles of hydrogen occupies a volume of 0.00466 * 22.4 L = 0.104 L or 104 mL

Therefore, volume of hydrogen gas produced is 0.104 L or 104 mL

Approximately 0.183375 grams of O₂ will dissolve in 3.75 L of water in contact with pure O₂ at 1.00 atm, based on the solubility of O₂ in water and Henry's law.

To calculate the amount of O₂ that will dissolve in 3.75 L of water in contact with pure O₂ at 1.00 atm, we need to use Henry's law and the solubility of O₂ in water.

Henry's law states that the concentration of a gas dissolved in a liquid is directly proportional to the partial pressure of the gas above the liquid. Mathematically, it can be expressed as:

C = k * P

where C is the concentration of the dissolved gas, k is the Henry's law constant, and P is the partial pressure of the gas.

The solubility of O₂ in water at 1.00 atm is typically around 0.0489 g/L.

First, we need to calculate the concentration of O₂ in the water using Henry's law equation:

C = k * P

C = (0.0489 g/L*atm) * (1.00 atm) = 0.0489 g/L

Next, we multiply the concentration by the volume of water to find the amount of O₂ that will dissolve:

Amount of O₂ = Concentration * Volume

Amount of O₂ = 0.0489 g/L * 3.75 L = 0.183375 grams

Therefore, approximately 0.183375 grams of O₂ will dissolve in 3.75 L of H₂O that is in contact with pure O₂ at 1.00 atm.

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Answer:

I believe it is subclaim 1. If you think it through enough, it starts to make sense, that's how I got the answer. Have a nice day, God bless.

The boiling point point of the solution is 80.76 °C.

We know that the boiling point has to do with the temperature at which the liquid would turn to gas. It is the temperature at which the pressure in the system would become equal to the pressure in the atmosphere.

We have that;

ΔT = K m i

ΔT = change in the temperature

K = boiling constant

m = molality of the benzene

i = Vant Hoff factor.

Let us recall that the solute is molecular hence the Van't Hoff factor would have to be 1.

We now get to substitute the values and then we have;

ΔT = 2.65 °C/m * 0.250 m * 1

= 0.66  °C

Thus the boiling point of the solution would now be;

80.1 °C + 0.66  °C = 80.76 °C

The temperature at which we expect the solution to boil is 80.76 °C.

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Answer: 80.76

Explanation:

Acellus confirms ✅

To determine the boiling point of the solution, we use the boiling point elevation equation:

ΔT = Kb * m

Given:

Kb (benzene) = 2.65 °C/m

m = 0.250 m

Substituting the values into the equation:

ΔT = 2.65 °C/m * 0.250 m

ΔT = 0.6625 °C

To find the boiling point, we add the boiling point elevation to the boiling point of the pure solvent (benzene). The boiling point of benzene is 80.1 °C.

Boiling point = BP (benzene) + ΔT

Boiling point = 80.1 °C + 0.6625 °C

Boiling point = 80.7625 °C

Therefore, the boiling point of the 0.250 m solution of C3H8 in benzene is approximately 80.7625 °C.