all compounds that have a plane of symmetry are known as meso compounds question 3 options: true false

Answer:

it has  a huge surface-to-volume ratio, very high porosity and completely different physiochemical properties.

Explanation:

idk if the answer is good  !

sorry

To summarize, at absolute zero, the energy needed for diffusion to occur is completely absent, and the molecules are completely frozen. So diffusion does not take place.

Diffusion is a process of net movement of molecules from an area of high concentration to an area of low concentration. The process of diffusion requires some form of energy, and at absolute zero, the energy is completely eliminated. This means that there would be no potential for molecules to move from a region of higher concentration to one of lower concentration. Therefore, diffusion does not occur at absolute zero.  At absolute zero, molecules stop vibrating and the atoms cease all motion. All molecular motion is frozen and stopped, so diffusion is not possible. Diffusion requires energy to move molecules, which is not available at absolute zero. The energy needed to drive molecules to move is not present, so molecules cannot move.

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Answer:

you an see the answer at the pic

There is a golden role of solubility, polar solute dissolve in polar solvent and non polar solute dissolve in non polar solvent. Therefore, the solution to be saturated the mass of salt must be greater than 36.0 g.

Solutions are a homogeneous mixture of two or more substances. A solution is a homogeneous mixture of solvent and solute molecules. Solvent is a substance that is in large amount in solution. solute is the substance which is in small amount in a solution.

The solubility of sodium chloride in water is 36.0 g per 100 g of water. which means that sodium chloride solution will contain 36.0 g of dissolved salt for every 100g of water. The solution will be unsaturated because of the less potassium nitrate. The solution to be saturated the mass of salt must be greater than  36.0 g.

Therefore, the solution to be saturated the mass of salt must be greater than  36.0 g.

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Answer Explanation:

Cane preparation (cutting and shredding cane to prepare it for juice extraction) Juice extraction (two technologies are in common use; milling or diffusion) Juice clarification (remove suspended solids from the juice, typically mud, waxes, fibres)

To prepare 0.194 M potassium acetate, add 2.379895 g of potassium acetate to a 125 mL volumetric flask and fill with water to the mark.

Molarity (M) is the amount of a substance in a certain volume of solution. Molarity is defined as the moles of a solute per litres of a solution.

The following data were obtained from the question:

Molarity of potassium acetate = 0.194 M

Volume of solution = 125 mL

Mass of potassium acetate =?

Next, we shall convert 125 mL to L. This can be obtained as follow:

1000 mL = 1 L

Therefore,

125 mL = 0.125 L

Thus, 125 mL is equivalent to 0.125 L.

Next, we shall determine the number of moles of potassium acetate in the solution. This can be obtained as follow:

Molarity of potassium acetate = 0.194 M

Volume of solution = 0.125 L

Moles of potassium acetate =?

Molarity = \(\frac{mole}{Volume}\)

Cross multiply

Mole of potassium acetate = 0.194 M × 0.125

Mole of potassium acetate = 0.02425 mole

Finally, we shall determine the mass of potassium acetate

Molar mass of potassium acetate= 98.14 g/mol

Mass of potassium acetate =?

Mole = \(\frac{mass}{Molar mass}\)

Mass of potassium acetate =0.02425  × 98.14

Mass of potassium acetate = 2.379895 g

Thus, to prepare 0.194 M potassium acetate, add 2.379895 g of potassium acetate to a 125 mL volumetric flask and fill with water to the mark.

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Hence, the probability that the mean cholesterol level of the sample will be greater than 217 is 0.034. Answer: 0.034.According to the given statement, we have the following data.

mean (μ) = 205 mg/dLstandard deviation

(σ) = 35 mg/dLsample size

(n) = 46(a) Probability that the mean cholesterol level of the sample will be no more than 205.To find this, we will use the z-score formula.z

= (x - μ) / (σ/√n)Here,

x = 205

μ = 205

σ =

35n

= 46Plugging in these values, we get,

z = (205 - 205) / (35/√46)

z = 0Hence, the probability that the mean cholesterol level of the sample will be no more than 205 is 0.5. Answer: 0.5

(b) Probability that the mean cholesterol level of the sample will be between 200 and 210:

To find this, we need to standardize the values and use the z-table.P(z < (210 - 205) / (35/√46)) - P(z < (200 - 205) / (35/√46))P(z < 1.65) - P(z < -1.65) = 0.4495 - 0.0505

= 0.3990Hence, the probability that the mean cholesterol level of the sample will be between 200 and 210 is 0.3990. Answer: 0.3990

(c) Probability that the mean cholesterol level of the sample will be less than 195: To find this, we need to standardize the values and use the z-table.P(z < (195 - 205) / (35/√46))P(z < -2.91) = 0.002Hence, the probability that the mean cholesterol level of the sample will be less than 195 is 0.002. Answer: 0.002

(d) Probability that the mean cholesterol level of the sample will be greater than 217: To find this, we need to standardize the values and use the z-table.P(z > (217 - 205) / (35/√46))P(z > 1.82) = 0.034 Answer: 0.034.

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In the correct significant figures, the solutions to the given problems are;

The term significant figures refers to the number of important single digits in the coefficient of an expression in scientific notation.

61.2 m + 9.35 m + 8.6 m = 79.15 m

9.44 m – 2.11 m = 7.33  m

1.36 m + 10.17 m = 11.53 m

34.61 m – 17.3 m = 17.31 m

Thus, in the correct significant figures, the solutions to the given problems are;

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Answer:

They may have different phenotypes because of differences in their environments, such as nutrition and healthcare. Why might genetically identical twins have different phenotypes?  Any genes on the same chromosome could be linked genes, whereas only genes on sex chromosomes can be sex-linked genes.

Explanation:

Due to the effects of the environment, genetically identical twins might have different phenotype.

The qualities or visible characteristics of an organism are its phenotype. It depends on how the environment and the genotype, or genetic code, of the organism interact.

Although human monozygotic twins as well as other genetically identical species may share startling physical similarities, they frequently differ in key characteristics, such as complicated diseases. The effects of the environment have generally been blamed for this variance across organisms with essentially identical chromosomal DNA sequences.

Therefore, due to the effects of the environment, genetically identical twins might have different phenotype.

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Answer:

c

Explanation:

a p e x :)

The charge an element would have if it lost or gained electrons. Hence, option C is correct.

Oxidation: The loss of electrons

Reduction: The gain of electrons

Oxidation number: the charge based on the number of electrons assigned to an atom as compared to the neutral atom.

Hence, the charge an element would have if it lost or gained electrons is the oxidation number.

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Taking into account the reaction stoichiometry, 0.2066 grams of CO₂ are formed from 0.500 grams of iron oxide and an excess of carbon.

In first place, the balanced reaction is:

2 Fe₂O₃ + 3 C → 4 Fe + 3 CO₂

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:

The molar mass of the compounds is:

Then, by reaction stoichiometry, the following mass quantities of each compound participate in the reaction:

The following rule of three can be applied: if by reaction stoichiometry 319.4 grams of Fe₂O₃ form 132 grams of CO₂, 0.500 grams of Fe₂O₃ form how much mass of CO₂?

\(mass of CO_{2} =\frac{0.500 grams of Fe_{2}O_{3}x132 grams of CO_{2} }{319.4 grams of Fe_{2}O_{3}}\)

mass of CO₂= 0.2066 grams

Then, 0.2066 grams of CO₂ are formed from 0.500 grams of iron oxide and an excess of carbon.

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Answer:

The right answer is "236.53 g".

Explanation:

The given values are:

P = 1.09 atm

V = 186 liters

The reaction will be:

⇒  \(KClO_3 (s)\rightarrow 2Kcl(s)+3O_2(g)\)

The moles of O₂ will be:

=  \(\frac{PV}{RT}\)

On substituting the values, we get

=  \(\frac{1.09\times 186}{0.0821\times 850}\)

=  \(\frac{202.47}{69.785}\)

=  \(2.90 \ moles\)

Now,

1 mole O₂ is produced from

= \(\frac{2}{3} \ mol \ KClO_3\)

then,

2.90 mole O₂ is produced from 2 mol KClO₃

= \(\frac{2}{3}\times 2.90\)

= \(1.93 \ mol \ KClO_3\)

hence,

The number of grans of solid in the engine will be:

= \(1.93\times 122.55\)

= \(236.53 \ g\)

Answer:

The reaction is nutride-cullic and sees all math about our lives.

Explanation:

The flaw in the representation is likely the absence of an external source of energy, as indicated in (option C). The electrolytic cell requires an external energy supply to drive the thermodynamically unfavorable decomposition of NaCl into Na and Cl₂.

The flaw in the representation can be identified by analyzing the given options:

A. Oxidation is occurring at the anode.

This statement is correct in terms of the electrolytic cell setup. Oxidation does occur at the anode, where chloride ions (Cl-) are oxidized to form chlorine gas (Cl₂).

B. Molten Na is shown at the cathode.

This statement is also correct. In the electrolytic cell, sodium ions (Na+) are reduced at the cathode, resulting in the formation of molten sodium (Na).

C. An external source of energy is not shown.

This statement is the most likely flaw in the representation. The decomposition of NaCl into Na and Cl₂ is an endothermic process, meaning it requires an input of energy from an external source for the reaction to proceed. The representation should include an external power supply or energy source to drive the electrolytic cell.

D. The direction of the electron flow in the wires is incorrect.

Without more specific information or visual representation, it is difficult to determine if the direction of electron flow in the wires is incorrect. This option cannot be confirmed as a flaw based solely on the information provided.

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Answer:

\(2.47x10^{25}atoms\)

Explanation:

Hello,

In this case, since the mineral torbernite has one copper atom, two uranium atoms, twenty oxygen atoms (2x2+4x2+8), two phosphorous atoms and sixteen hydrogen atoms (12x2) and therefore forty one in total, by using the Avogadro's number one is able to compute the total number of atoms in one formula unit or one mole:

\(Atoms=1molCu(UO_2)_2(PO_4)_2\dot \ 8H_2O*\frac{41mol\ of \ atoms}{1molCu(UO_2)_2(PO_4)_2\dot \ 8H_2O}*\frac{6.022x10^{23}atoms}{1mol\ of \ atoms} \\\\=2.47x10^{25}atoms\)

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A temperature reversal is a layer in the air where air temperature increments with level. The lower part of a cap has an inversion. The cap is a layer of relatively warm air above. In the winter, a long, clear night is ideal for temperature inversion.

It ensures that the heat that escapes is greater than the heat that enters. Nevertheless, air should not be mixed vertically at lower levels. The earth is cooler than the air above it in the early morning hours because the day's heat is reflected off during the night. Temperature inversion is typical over polar regions.

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Answer:

physical properties are the physical things that can be seen touch or felt

The H2 (H-H) bond has a much weaker bond strength than the F2 (F-F) bond. This is due to the fact that the hydrogen atoms in the H2 molecule have a much smaller atomic radius than the fluorine atoms in the F2 molecule.

As a result, the H2 molecule has a much shorter bond length than the F2 molecule. This shorter bond length leads to a weaker bond strength between the two hydrogen atoms. Additionally, the F2 molecule has a stronger bond energy than the H2 molecule due to its larger atomic radius.

The larger atomic radius of the fluorine atoms allows more electrons to be shared between them, creating a stronger bond. As a result, the F2 molecule has a much stronger bond energy than the H2 molecule.

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• The balanced equation for the reaction is given by:

• From the above reaction we can see that:

1 mole of ethanol (CH3Ch2OH) produces 1 mol of acetic acid(CH3COOH)

so . x mole of ethanol will produce 0.9mol of acetic acid ....(cross multiply)

xmol ethanol * 1mol acetic = 1mol ethamol* 0.9molacetic

∴ xmol ethanol = 1*0.9 /1

= 0.90 mol

• This means that, 0.90 mol of ethanol, is needed to produce 0.9mol acetic acid,.

Answer:

able to evaporate

Explanation:

gas is evaporated liquid...... the process cannot take place again

Density is defined as the mass of a substance per unit volume. In this case, the density of urine is given as 1.02 g/ml. This means that for every 1 ml of urine, there is 1.02 g of mass.

To find the mass of urine eliminated by the patient in one day, we need to multiply the volume of urine by its density. The volume of urine is given as 1250 ml.

Mass of urine = Volume of urine x Density of urine

Mass of urine = 1250 ml x 1.02 g/ml

Mass of urine = 1275 g

Therefore, the mass of urine eliminated by the patient in one day is 1275 g.

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Yes, the reaction of nitrogen gas and hydrogen gas to give ammonia is a redox reaction. Let us understand the concept of redox reactions to elaborate on the answer further. Redox reaction Redox reaction is a chemical reaction that involves the transfer of electrons between two chemical species.

Redox reactions are divided into two categories: oxidation and reduction. In oxidation, a chemical species loses one or more electrons, while in reduction, a chemical species gains one or more electrons. The term redox is derived from reduction-oxidation.

In redox reactions, one chemical species is oxidized while the other is reduced. In simpler terms, when one chemical loses electrons, the other chemical gains electrons. Thus, it is known as a redox reaction.Reaction of nitrogen gas and hydrogen gas to give ammonia: Nitrogen gas and hydrogen gas combine to give ammonia as per the following chemical equation

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Dehydrohalogenation is the elimination reaction in which alkene is formed as a product by the elimination of hydrogen halide.

This elimination response undergoes inside the presence of a robust base. in this response, each hydrogen and halogen cleaves in a single step.

Zaitsev’s rule:-

This rule states that, in the removal response, the product that is greater substituted is represented as a strong product.

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Properties of carbon that explain its presence as a basic element of organic compounds - Catenation and Tetravalent.

Carbon is a chemical element with the symbol C and atomic number 6 (it contains 6 protons in its nucleus). As a member of group 14 in the periodic table, it is non-metallic and tetravalent – ​​making four electrons available to form covalent chemical bonds.

The most common isotope of carbon has 6 protons and 6 neutrons and has an atomic mass of 12.0107 AMU. Its basic electronic configuration is 1s22s22p2.

Properties of carbon that explain its presence as a basic element of organic compounds -

Carbon has the ability to form very long chains of strong and stable interconnecting C-C bonds. This property, called catenation allows carbon to form an almost infinite number of compounds.

Carbon has an affinity for bonding with other small atoms, including other carbon atoms, through the formation of stable covalent bonds. Despite the fact that it is present in a huge number of compounds, carbon is weakly reactive compared to other elements under normal conditions.

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Direct contact between objects causes conduction or heat transfer. The heat is transferred inside the fluid during convection. Heat transfer in radiation happens by electromagnetic waves without the use of particles.

First, ascertain whether the two things are in contact. If they are, conduction is how heat is transferred between them. Determine whether there is a fluid medium, such as a liquid or gas, connecting the items if they are not in contact.

Evidence of heat transport is apparent. Convection is the phenomenon that causes the air to shimmer over radiators. Conduction is the phenomenon that causes you to feel warm when you place your hand on a spoon that has been sitting in a hot bowl of soup (radiation).

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The answers include the following:

Tendons are connective fibrous tissues that attaches muscle to bone and they have a bright white color together with a strong and smooth appearance which can be observed when studied.

Tendons are very important as they help in ensuring that the movement of parts of the body are easy due to its holding some structures such as ligaments in place. It is present in all bone joints due to its numerous functions in the musculoskeletal system of organisms.

The tendon is very flexible and binds the muscles in the body to other structures which is why it is referred to as a connective tissue and the above answers are the most appropriate.

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Answer:

four

Explanation:

There is four

CH 4    methane

O2      oxygen

CO2    carbon dioxide

H20    water