what pressure would a gas mixture in a 10.0 l tank exert if it were composed of 48.5 g he and 94.6 g co 2 at 398 k?
A. 7.02 atm
B. 39.6 atm
C. 58.7 atm
D. 32.6 atm
E. 46.6 atm

Sucrose has the molecular  C₁₂H₂₂O₁₁ . if a sucrose sample contains 9.0x10²⁴ atoms of hydrogen, There are 1.4370 x10²⁶ molecules of sucrose are present in the sample.

Sucrose C₁₂H₂₂O₁₁ contain  C₁₂H₂₂O₁₁  Hydrogen

First we should how how many percentage of hydrogen in sucrose

The following formula will be used to determine the percentage of elements present in a molecule:

(Mass of Element / Mass of Molecule) / 100 equals the percentage of an element.

Sucrose's molecular weight is.

= (12)12 + (1)22 + (16)11, 

where 12 is the mass of an atom of carbon.

Hydrogen's atomic mass is 1, thus.

16 = Oxygen Atomic Mass

mass sucrose = 144 + 22 + 176

mass sucrose = 342 g/mol

% of H  =  (22 / 342) ×100    =  6.43 %

to calculate how many molecules sucrose are present we can compare percentage of hydrogen to % sucrose

 % hydrogen         =         % sucrose            

atom hydrogen           molecules of sucrose

6.43 %        =              100%              

9.0x10²⁴          molecules of sucrose    

molecules of sucrose    = 1.4370 x10²⁶ molecules

Therefore,  There are 1.4370 x10²⁶ molecules of sucrose are present in the sample.

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Answer:

The pH of a solution is a measure of its concentration of hydrogen ions. The higher the concentration of H + ions in an acidic solution, the lower the pH. A pH of 1 represents a hydrogen ion concentration of 0.1 mol/dm 3.

...

pH and hydrogen ion concentration.

Concentration pH

0.001 mol/dm 3 3

0.0001 mol/dm 3 4

Explanation:

Answer:

0.0001

That the answer your welcom

Each reaction's Lewis acid and Lewis base are as follows:

AlCl3 is the Lewis acid in the reaction, whereas Cl- is the Lewis base. F- is the Lewis base and BF3 is the Lewis acid in the reaction Cl- + AlCl3 --> AlCl4- BF3 + F- --> BF4-

The Lewis base in this reaction is NH3, and the Lewis acid is H+. NH3 + H+ --> NH4+

Explanation: A Lewis acid acts as an electron pair acceptor in a Lewis acid-base reaction, whereas a Lewis base acts as an electron pair donor. In the initial reaction, Cl- provides AlCl3 with a pair of electrons, which AlCl3 accepts to produce AlCl4-. As a result, AlCl3 is the Lewis acid and Cl- is the Lewis base. In the subsequent response, F- provides two pairs. BF3 takes the electrons and transforms them into BF4-. Hence, the Lewis bases are F- and BF3, respectively. In the third reaction, H+ absorbs a pair of electrons from NH3 and forms NH4+ as a result. As a result, the Lewis bases are NH3 and H+.

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The statement "Isotopes with an even number of both protons and neutrons are generally stable" is TRUE.

Isotopes with an even number of protons and neutrons are known as isotopes. A single element can have a different number of neutrons; such elements are known as isotopes. A nucleus containing a different number of neutrons will have a different mass number than the element's standard atomic number since the mass number is equal to the number of neutrons plus the number of protons in the nucleus.

There are 275 isotopes recognized for 81 stable elements, while there are 50 isotopes for elements that are radioactive and occur naturally.

Isotopes with an even number of both protons and neutrons tend to be more stable, as the strong nuclear force and the electromagnetic force in a nucleus cancel out, causing a more stable nucleus. The vast majority of stable elements have a nearly equal number of neutrons and protons, though there are some exceptions, such as beryllium-8 and helium-3.

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Answer:

The Valence electrons in S

Explanation:

Sulphur has highest effective nuclear charge as in a period there is increase in effective nuclear charge from left to right.Sulphur is in the end in a period leaving Mg and Al in left side.

Hope this helps....

Good luck on your assignment...

The number of valence electron pairs in the outermost shell, as determined by the valence shell electron repulsion theory (VSEPR), determines the molecular shape.

By analyzing the repulsion between bond electron pairs in the outermost electron shell, a process known as the molecular shape can determine the shape of a molecule. Because most physical and chemical properties are influenced by molecular shape, it is crucial to study molecular shape or geometry.

The foundation of VSEPR is minimizing the strength of the electron-pair repulsion surrounding the central atom under consideration. The foundation of the VSEPR theory is the notion that the geometry (shape) of a molecule is primarily determined by the repulsion between the pairs of electrons surrounding a central atom.

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Answer: Wheat flour, edible oil, egg white, lettuce preservative, meat or poultry marinade, vegetable antibacterial wash.

Explanation:

hydrogen peroxide is used as a bleaching agent in some food

I hope this helped

Answer:

Incorrect in order to find Volume there must be a Density

Answer: The percent by volume of isopropyl alcohol in a solution made by mixing 120 mL of the alcohol with enough water to make 350 mL of solution is 25.5%.

Explanation:

Given: Volume of solute = 120 mL

Volume of solvent = 350 mL

Now, total volume of the solution is as follows.

\(V_{total} = V_{solute} + V_{solvent}\\= 120 mL + 350 mL\\= 470 mL\)

Let us assume that 100 mL of solution is taken and the amount of isopropyl alcohol present in it is as follows.

\(\frac{V_{solute}}{V_{total}} \times 100 mL\\\frac{120 mL}{470} \times 100 mL\\= 25.53 mL\)

Hence, there is 25.53 mL isopropyl alcohol is present in 100 mL of solution. Therefore, %v/v is calculated as follows.

\(Percent (v/v) = \frac{25.53 mL}{100 mL}\\= 25.5%\)

Thus, we can conclude that the percent by volume of isopropyl alcohol in a solution made by mixing 120 mL of the alcohol with enough water to make 350 mL of solution is 25.5%.

The high-energy bond associated with the succinyl-CoA synthetase reaction is A. acyl phosphate bond

Succinyl-CoA synthetase is an enzyme that catalyzes the conversion of succinyl-CoA to succinate, with the simultaneous synthesis of ATP or GTP from ADP or GDP, respectively. This reaction is an important step in the citric acid cycle, which is also known as the Krebs cycle or the tricarboxylic acid cycle.

The acyl phosphate bond in succinyl-CoA is a high-energy bond due to the resonance stabilization of the phosphate group, making it a favorable source of energy. When succinyl-CoA synthetase cleaves this bond, the energy released is used to phosphorylate the nucleoside diphosphate (ADP or GDP), forming a high-energy nucleoside triphosphate (ATP or GTP). Although options B, C, and D represent other types of high-energy bonds, they are not directly associated with the succinyl-CoA synthetase reaction. Therefore, the correct answer is A) acyl phosphate. So therefore the correct answer is A. Acyl phosphate bond, the high-energy bond associated with the succinyl-CoA synthetase reaction.

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The relative atomic mass of Mg is 24.3, the relative atomic mass of S is 32.1, and the relative atomic mass of O is 16.0.

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Answer:

The temperature is 298.5 K, which corresponds to 0.50°C.

A jacket would be appropriate clothing for this weather.

Explanation: Hope this helps:)

According to Charle's law, temperature outside the piston of a volume of 5 liters is -60.99 °C or 212.16 K. Appropriate clothing for the weather is woollen clothes.

Charles law is an experimental gas law  which provides description about the behavior of gases  which tend to expand on heating.It states that, at constant pressure, the temperature  is in direct proportion  with the volume that is,V∝T or V₁/T₁=V₂/T₂.The relation between volume and temperature is linear as the temperature increases volume also increases.

The graph of volume versus temperature is a straight line passing through the origin.

On substitution of values in the above formula,30/1273=5/T₂

∴T₂=1273×5/30=212.16 K or -60.99°C.

Thus ,the temperature of the gas at 5 liter volume is -60.99°C.

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A reaction between an acid and a base occurs when vinegar and baking soda are combined. Baking soda serves as the base, and vinegar is the acid. A gas known as carbon dioxide bubbles and foams as a result of this reaction between the two. Because there is nowhere else for this gas, it expands the balloon, resulting in the self-inflating balloon.

SCIENCE: Carbon dioxide is a gas produced when baking soda and vinegar are combined. The gas starts to extend in the jug and begins to expand the inflatable. The balloon will expand in size the more gas produced.

Because their particles travel at high speeds in all directions, gases expand quickly. Since the carbon dioxide gas has nowhere else to go, it begins to fill the balloon as it fills the bottle. The balloon expands as the carbon dioxide gas fills it.

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Answer:

as mass and the square of speed is directly proportional to the the kinetic enegry so, more there will be mass and speed there will be more kinetic enegry.

The 25 mL is the calibration of this Erlenmeyer flask. so, option (b) is correct.

What is calibration ?

The process of calibrating a measurement instrument involves comparing it to a traceable reference device and documenting the comparison. A "calibrator" is another name for the reference standard. It stands to reason that the reference is more accurate than the calibration instrument.

What is  Erlenmeyer flask?

Erlenmeyer flasks are used to mix, heat, cool, incubate, filter, store, and perform various liquid-handling operations on liquids. For titrations and boiling liquids, their sloping sides and narrow necks enable the contents to be blended by swirling without the risk of spillage.

Therefore, 25 mL is the calibration of this Erlenmeyer flask.

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Acetylcholinesterase is an enzyme that breaks down the neurotransmitter acetylcholine into choline and acetate. This process is called hydrolysis and terminates the action of acetylcholine in the nervous system.

Acetylcholinesterase is found in the synaptic cleft, which is the narrow gap between nerve cells where neurotransmitters are released and received. It is also found in other tissues, including the neuromuscular junction, red blood cells, and the central nervous system. In the neuromuscular junction, acetylcholinesterase plays a critical role in terminating the action of acetylcholine, which is necessary for proper muscle function. The proper functioning of acetylcholinesterase is important for normal nervous system function and various biological processes, including cognition, memory, muscle movement, and other bodily functions. Dysfunction of acetylcholinesterase has been linked to various medical conditions, including Alzheimer's disease, myasthenia gravis, and organophosphate poisoning.

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Answer:

The physical principle known as Charles' law states that the volume of a gas equals a constant value multiplied by its temperature as measured on the Kelvin scale (zero Kelvin corresponds to -273.15 degrees Celsius

Explanation:

When you add wind power to the electric power grid, you are most likely to help address the issue of sulfur oxide (SO and SO2) emissions from coal-fired power plants in the U.S.

Coal-fired power plants are a significant source of electricity in the United States, but they also produce a large amount of air pollution, including sulfur oxide emissions. When sulfur oxides are released into the air, they can react with other chemicals to form acid rain, which can have harmful effects on the environment and human health.

By adding wind power to the electric grid, we can reduce the amount of electricity that is generated by burning coal, which can help to reduce sulfur oxide emissions from power plants. Wind power is a clean, renewable source of energy that does not produce any harmful air pollutants, making it a more environmentally friendly alternative to coal-fired power.

Overall, wind power can help to address the issue of sulfur oxide emissions from coal-fired power plants and can help to promote a cleaner and more sustainable energy future in the United States.

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Answer:

d

Explanation:

it is called the solvent. let me know if this is wrong.

Answer:

d

Explanation:

the solvent is the liquid that the salt is dissolved in(the water) the solute is what is dissolved in the solvent(the salt) the solution is the outcome of the experiment.

Answer:

Elements are distinguished from one another by their atomic numbers. No two elements have the same atomic number. It is the atomic number, and therefore the number of protons in its atomic nuclei, that define an element.

In order to answer the question first we must write the atomic number of each element:

Zirconium (Zr): 40

Cadmium (Cd): 48

Iridium (Ir): 77

Iron (Fe): 26

Then, we have to complete the distribution of electrons in each orbital for each atom:

The first 4 levels have the following distribution:

Level1: 1s

Number of electrones: 2

Level 2: 2s, 2p

Number of electrones 8 (2 in the s orbital and 6 in the p orbitals).

Level3: 3s, 3p, 3d

Number of electrones 18 (2 in the s orbital, 6 in the p orbital and 10 in the d orbitals)

Level 4: 4s, 4p, 4d, 4f

Number of electrones 32 (2 in the s orbital, 6 in the p orbitals, 10 in the d orbitals and 14 in the f orbitals)

The order in which the orbitlas are completed depends on the energy of each level. For example the 4s orbitals will be completed before the 3d orbitals because their energy is lower.

The order is as follows:

1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s, 4d, 5p...

Now, knowing the atomic number we can answer the question:

For Zirconium (total 40 electrones):

2 electrones are predicted in the 4d orbital

For Cadmium (total 48 electrones):

10 electrones are predicted in the 4d orbital

For iridium, as it has an atomic number higher than Cadmium we can predict tha it also complets the 4d orbital, then it has also 10 electrones in it.

For iron (total 26 electrones)

Iron has no electrones in the 4d orbitals

Answer:

CH³–C=CH——CH³–CH=CH²

Explanation:

THIS IS PROPYNE TO PROPENE

The magnitude of change in the freezing point of 1.00 L of water when one mole of NaCl is added is 1.86°C.

The magnitude of change in the freezing point of 1.00 L of water when two moles of NaCl is added is 3.72°C.

When one mole of NaCl is added to 1.00 L of water, the magnitude of change in the freezing point is calculated as follows:

Change in freezing point = Kf × molality of solute

For water, the value of the freezing point depression constant (Kf) is 1.86°C/m. Since we are dealing with one mole of NaCl in 1.00 L of water, the molality of the solution can be calculated as follows:

Molality (m) = Number of moles of solute (n) / Mass of solvent (kg)

Since we have 1 mole of NaCl in 1.00 L of water, the mass of water is 1.00 kg. Therefore, the molality is:

Molality (m) = 1 mole / 1.00 kg = 1 mol/kg

Now we can calculate the change in freezing point:

Change in freezing point = Kf × molality of solute = 1.86°C/m × 1 mol/kg = 1.86°C

Different calculations will be performed when two moles of NaCl are added. The calculation will be similar to the above mentioned except the number of moles of NaCl will change from 1 to 2. The molality of the solution can be calculated as follows:

Molality (m) = Number of moles of solute (n) / Mass of solvent (kg)

Molality (m) = 2 mole / 1.00 kg = 2 mol/kg

Therefore, the change in freezing point will be:

Change in freezing point = Kf × molality of solute = 1.86°C/m × 2 mol/kg = 3.72°C

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we can use this principle law of conservation of mass: 25 g + 26 g = 17 g + x g, where x represents the mass of d produced. Solving for x, we find that x = 34 g, so 34 g of d are produced.

The law of conservation of mass states that mass is conserved in a chemical reaction, meaning that the total mass of reactants must equal the total mass of products.

In a chemical reaction, the law of conservation of mass states that the total mass of reactants must equal the total mass of products. Using this principle, we can solve for the unknown mass of a product in a reaction. In this hypothetical reaction, 25 g of a and 26 g of b react to produce 17 g of c and some amount of d. We can write an equation to represent the relationship between the masses of reactants and products: 25 g + 26 g = 17 g + x g, where x represents the mass of d produced. To find the value of x, we can solve the equation: 25 g + 26 g = 17 g + x g, so x = 25 g + 26 g - 17 g = 34 g. Therefore, 34 g of d are produced in this reaction.

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Answer:

Gold

Hope it helps

have a good day

A body fossil preserves the physical remains of an organism, while a trace fossil preserves indirect evidence of the organism's activities or behavior. Both types of fossils contribute valuable information to our understanding of past life on Earth.

A fossil represents the preserved remains or traces of ancient organisms. The key difference between a body fossil and a trace fossil lies in the nature of the preserved evidence.

Body Fossil: A body fossil refers to the preserved remains of an organism's body parts, such as bones, teeth, shells, or plant structures. These fossils provide direct evidence of the organism's physical characteristics and are typically formed through processes like mineralization or petrification.

Trace Fossil: A trace fossil, also known as an ichnofossil, represents indirect evidence of ancient organisms' activities rather than their physical remains. Trace fossils include tracks, burrows, footprints, nests, and other trace marks left behind by organisms. These fossils provide insights into the behavior, movement, and ecological interactions of organisms rather than their anatomy.

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