The internal energy of 10 moles of helium (a monatomic gas) is 15 kJ. What is the rms speed of the molecules? (The molar mass of helium is 4.00 g/mole.)

Answer:

Answer: II and IV

Explanation: Flammability and the ability to rust are chemical properties because they change an object. I, III, and V are physical properties because it doesn't change the object's composition. This includes weight, the change in matter (solid to liquid), or change in volume.

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Explanation:

Answer:

Answer: II and IV

Explanation:

Explanation: Flammability and the ability to rust are chemical properties because they change an object. I, III, and V are physical properties because it doesn't change the object's composition. This includes weight, the change in matter (solid to liquid), or change in volume.

Answer:

Biology is based on organisms interactions

Explanation:

Not sure....if wrong pls correct me

Answer:

organisms

Explanation:

Biology is based on organisms interactions.

Answer:

Organic chemistry is what people call a 'branch' of chemistry that studies the structure, properties, and reactions of organic compounds. These contain carbon in covalent bonding.

Answer:

Explanation:

In the measurement of 16.50 , the measuring scale is capable of measuring upto the depth of 1 / 100th of one mL . But In the measurement of 8.0 , the measuring scale is capable of measuring upto the depth of 1 / 10th of one mL

So the former is more precise because the second scale the measurement beyond 1/ 10 th is made by guesswork which may be faulty . So the former is more precise .

Answer: his lab partner is more precise

Explanation: If the lab partner carefully measured the measurements and the other guy just determined it the lab partner's measurements should be more exact. HOPE THIS HELPS.

Answer:

The product would have more acidity than Diethyl malonate

Explanation:

For this question, first, we have to start with the structure of the bromination reaction.  The bromination would add a "Br" atom in the middle carbon between the ester groups. Therefore, the molecule produced would be diethyl 2-bromomalonate and the formula of this compound fits with the reported by the question: [tex]C_7H_1_1BrO_4[/tex]

Now, if we have to analyze the acidity we have to check the most acidic hydrogen. In this case, is the "H" in the middle carbon (red hydrogen). In the Diethyl malonate, we have an inductive effect caused by the carbonyl groups on each side of the middle carbon. In the diethyl 2-bromomalonate, we have this same inductive effect plus the Br atom bonded to the same carbon. Therefore, would be easier to remove the hydrogen. So, diethyl 2-bromomalonate would ba more acidity than Diethyl malonate.

See figure 1

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Answer:

115 g

Explanation:

Step 1: Given data

Step 2: Calculate the moles of glucose

The molarity is equal to the moles of solute divided by the liters of solution.

M = moles of glucose / liters of solution

moles of glucose = M × liters of solution

moles of glucose = 0.318 mol/L × 2.00 L

moles of glucose = 0.636 mol

Step 3: Calculate the mass corresponding to 0.636 moles of glucose

0.636 mol × 180.2 g/mol = 115 g

Answer:

Amino acids, along with glucose, are reabsorbed in the glomerular system with a passive or active mechanism as the fluid travels through the entire renal tubular system and enters the circulation again.

Active mechanisms are those that require expenditure of energy, that is, expenditure of the energy currency, while the passive ones do not, they occur through spontaneous non-energy processes such as osmosis, the osmotic gradient and the difference in concentrations in different compartments.

Explanation:

Glomerular filtration is the regulator of the excretion of metabolites and toxic molecules or not necessary for our body. That is why if the amino acid values ​​are high as well as those of glucose in urine, we will be facing a pathology.

If glucose is increased, it is because there is a glycemic peak in blood volume, hence possible diabetes.

And if the amino acids are increased, we could be facing an autoimmune or proteolytic pathology where a large amount of body proteins such as muscle proteins would be breaking down and releasing the amino acids that make it up, this phenomenon usually appears in those people who suffer from rhabdomyolysis in expenses very intense energy sources not appropriate.

On the other hand, glomerular filtration occurs in the kidney and is carried out by the nephron, which is the functional unit of the kidney, within it there is a specific tubular system in collection, absorption and reabsorption, added to the presence of Bowman's capsule.

Answer:

D) sodium t-butoxide + bromomethane

Explanation:

The alkoxide ion is a strong nucleophile, that unlike alcohols, will react with primary alkyl halides to form ether. This general reaction is known as the Williamson synthesis, and is a SN₂ displacement. The alkyl halide must be primary so the back side attack is not hindered, and the alkoxide ion must be formed with the most hindered group.

The mechanism can be seen in the attachment.

The reaction of sodium t-butoxide and bromomethane gives the higher yield. Thus, option D is correct.

For the production of t-butyl methyl ether in higher yield, there has been the Williamson ether synthesis. The synthesis has been carried out with the reaction of alkylhalide with the alkoxide, that results in the formation of an ether.

The Williamson reaction has been a SN2 reaction that has been carried out in two steps with the addition of nucleophile and removal of the halide for the formation of ether.

From the given reactants, the higher yield has been obtained with the reaction of alkoxide and alkyl halide. Thus, reaction of sodium t-butoxide and bromomethane gives the higher yield. Thus, option D is correct.

For more information about the Williamson synthesis, refer to the link:

https://brainly.com/question/14491871

Answer:

Ka  → 1.5×10⁻⁵

Option E. None of the above

Explanation:

We propose the reaction of equlibrium

Weak ac.H +  H₂O ⇄  Weak ac⁻  +  H₃O⁺

Initially we have 0.30 moles of acid in 1 L

In equilibrium we would have:

Weak ac.H +  H₂O ⇄  Weak ac⁻  +  H₃O⁺

0.30 - x                               x               x

We have the pH, where we can obtanined the x, the [H₃O⁺] in the equilibrium.

pH = - log [H₃O⁺] → [H₃O⁺] = 10^⁻(pH)

[H₃O⁺] = 10⁻²'⁶⁷ = 2.14×10⁻³

So let's determine the concentration of the acid, in the equilibrium

0.30 - 2.14×10⁻³ = 0.29786 → [Weak ac.H]

2.14×10⁻³ →  [H₃O⁺] = Conjugate base (Weak ac.⁻)

Let's make the expression for Ka

Ka = [Weak ac.⁻] .  [H₃O⁺]  / [Weak ac.H]

Ka = x² / 0.30 - x

Ka = (2.14×10⁻³)² / 0.29786 → 1.5×10⁻⁵

Answer:

Both of these phenomena is due to the ignition temperature.

Explanation:

Trees don't spontaneously catch fire because there is a temperature above which materials combust. This is called the "ignition temperature." This temperature must be reached before the trees will ignite, and the external condition does not always harbor such high temperature.

Fires don't stop immediately because, while some parts of the flame has cooled down sufficiently below the ignition temperature, other parts of the flame have not. It takes time for all the part of the flame to cool down below ignition temperature for the burning to stop.

These are all due to the ignition temperature.

The ignition temperature is defined as the temperature at which a substance begins to burn spontaneously.

The ignition temperature of a woody material is about 343 °C (650 °F). This ignition temperature is much higher than ambient temperature hence trees don't spontaneously catch fire and burn all the time.

Also, all the parts of the burning fire are not at the same temperature. Some parts may cool below the ignition temperature quicker than other parts of the flame hence  the fires don't stop immediately as soon as they start.

Learn more; https://brainly.com/question/13048470

Answer:

Anode

Explanation:

In the electrolysis of acidified water;

Anode half reaction;

4OH^-(aq)-----> 2H2O(l) + O2(g) + 4e

Cathode half reaction;

4H^+(aq) + 4e ----> 2H2(g)

Phenolphthalein has a pink colour in a neutral medium. A neutral medium in this electrolysis is one in which the hydroxide ion is reduced to water and oxygen and this occurs at the anode hence this is the electrode around which the solution will turn pink.

Answer:

B. False

Explanation:

The mass of a neutron is nearly the same mass of a proton whereas the electron is much less massive.

Exact masses are:

Neutron = 1.6749286x10²⁷ kg

Proton = 1.6726231x10⁻²⁷ kg

Electron = 9.1093897x10⁻³¹ kg

The mass of a proton plus the mass of an electron is:

1.6735340x10⁻²⁷ kg.

This mass is different to the mass of the neutron. Thus, the answer is:

Answer:

Zinc sulfide- more soluble in 0.10 M hydrochloric acid solution

Silver chloride- less soluble in 0.10 M hydrochloric acid solution

Lead iodide- same solubility in 0.10 M hydrochloric acid solution as in pure water

Silver hydroxide- same solubility in 0.10 M hydrochloric acid solution as in pure water

Explanation:

Solubility refers to the amount of a substance that dissolves in 1 dm^3 of solvent. Several factors influence the dissolution of solutes in a given solvent. Some substances dissolves at a low pH (in acid solutions) while other dissolve at a low pH (in basic solutions).

For Silver chloride, its solubility decreases in 0.10 M hydrochloric acid solution because of common ion effect when compared to its solubility in pure water.

Answer and Explanation:

The refractive index states that the incidence angle sine to refraction angle sign

Now, According to the given situation, the manner that the materials from the smallest refractive index to the largest refractive index is presented below:-

Air = 1

Water = 1.33

Glass = 1.52

Quartz = 1.46

Diamond = 2.42

From the above  we can find the sequence that is

[tex]Air<Water<Quartz<Glass<Diamond[/tex]

Answer:

I will need 49 grams of iron(II) chloride and 173 mL of water .

Explanation:

222 grams of 22.1 % FeCl₂ will require

222 x 0.221 gram of FeCl₂ and rest will be water .

49 gram of  FeCl₂ and 173 grams of water .

density of water is 1.00 g / mL

volume of water in mL = 173 / 1

= 173 mL

Hence I will need 49 grams of iron(II) chloride and 173 mL of water .

Answer:

same

Explanation:

confused

Answer:

Option 3: [tex]C_{n} H_{2n-2}[/tex]

Explanation:

Alkynes are of the homologous series of acyclic (alphatic) triple bonded carbon-carbon atoms. The could be branched or unbranched chain, but the triple bonded carbons are ether attached to hydrogen atoms or a single-bond with carbon.

Thus they carry the general formula [tex]C_{n} H_{2n-2}[/tex] across the series; where n is any integer greater than 1. The simplest forms of alkynes are acetylene molecules which have the formula [tex]C_{2} H_{2}[/tex].

I hope this explanation was resourceful and easy to understand.

Answer:

If you turn the lights on and off rapidly, then the bulb will burn out faster. It's some sort of prediction

Answer:

1. If I replace the battery in my car, then my car will get better gas mileage.

2. If I eat more vegetables, then I will lose weight faster.

3. If I add fertilizer to my garden, then my plants will grow faster.

4. If I brush my teeth every day, then I will not develop cavities.

5. If I take my vitamins every day, then I will not feel tired.

6. If 50 mL of water are added to my plants each day and they grow, then adding 100 mL of water each day will make them grow even more.

Explanation:

Answer: Option A.

high formalization

Explanation:

High formalization is not a reason organic structures promote innovation because formalization refers to written rules, regulations, policies or descriptions of organic structures and it is not a reason to promote innovation of organic structures because there will be continual manner of structure behavior and there will be reduced motivation.

Answer:

Meter.

Explanation:

Hello,

In this case, The SI unit of length equal to the distance light travels in a vacuum in 1/299 792 458 of a second is the meter as the physical standard used to establish such length.

Regards.

Answer:

A chemical compound can be described as substance composed of atoms from more than one element held together by chemical bonds in a fixed stoichiometric proportion. A compound has different physical and chemical properties from its constituent elements. Your welcome! =)

Explanation:

Answer:

The spin of the complex is 5.92 B.M

Explanation:

Please see the attachments below

Answer:

At 336.6K, the density of the liquid is 1.212g/cm³

Explanation:

The density change in a substance with the temperature. As general (But not always applicable) rule, the density decreases with the temperature.

A formula to find density of the liquid of the problem is:

[tex]D = \frac{1.246g/cm^3}{1+8.324x10^{-5}K^{-1}*T}[/tex]

Where D is density and T is absolute temperature (In K).

If we want a density of 1.212g/cm^3:

[tex]1.212g/cm^3 = \frac{1.246g/cm^3}{1+8.324x10^{-5}K^{-1}*T}\\1.212g/cm^3+1.01x10^{-4}g/cm^3K^{-1}*T = 1.246g/cm^3\\1.01x10^{-4}g/cm^3K^{-1}*T =0.034g/cm^3\\T = 336.6K[/tex]

Answer:

See explanation

Explanation:

In an octahedral crystal field, the metal is at the centre of an octahedron with ligands at the six corners of the octahedron. Approach of the ligand splits the orbitals into higher energy eg and lower energy t2g orbitals. The eg orbitals are 0.6∆o above the bari centre while the t2g orbitals are -0.4∆o below the bari centre.

In a tetrahedral crystal field, the tetrahedral crystal field splitting ∆t= 4/9∆o. In the tetrahedral crystal field, the t2 orbitals are at a higher energy and are +0.4∆t above the bari centre while the e orbitals are at a lower energy and are -0.6∆t below the bari center.

Explanation:

Mass = density * volume

Mass of wooden block = 2.58 * 13 = 33.54 g

Mass = density x volume  

Mass of wooden block = 2.58 x 13 = 33.54 g