Consider the two‑step synthesis of 2‑hydroxy‑2,4‑dimethylpentanoic acid using the reagents provided

Answer:

D

Explanation:

because if a flea is on a dog that is a parisite to host relashionship

Answer:

for number 3 is D

Explanation:

but i am not 100% sure of that

Since iron is more reactive than copper, when steel wopl is placed in a solution of copper (II) sulfate solution into a small beaker, it dissolves and copper metal is produced.

A displacement reaction is one in which a more reactive element displaces another from its compound.

Reactive metals displace less reactive metals from their solutions.

Iron is a more reactive metal than copper and will displace copper from a solution of its salt.

Therefore, when steel wool is placed in a solution of copper (II) sulfate solution into a small beaker, the iron dissolves and copper metal is produced.

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Answer:

right answer is A bcz

Explanation:

In the case of water, hydrogen bonds form between neighboring hydrogen and oxygen atoms of adjacent water molecules. The attraction between individual water molecules creates a bond known as a hydrogen bond.

Answer:

oxygen and hydrogen indifferent molecules

The mass of hydrogen atoms in the compound would be 2 grams.

The carbon atoms in the compound have a mass of 24 grams.

One carbon atom has a mass of 12 grams. Thus, there are two (12 x 2 = 24) carbon atoms in the compound.

This means that there are also two hydrogen atoms in the compound. One hydrogen atom weighs 1 gram. Hence, the mass of the hydrogen atoms in the compound will be 2 grams.

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The chemical elements and compounds that are present in a grocery item such as mayonnaise include:

A product label can be defined as a paper document which contains information about the nutrients, chemical elements, and other compounds that are present in a product such as a battery, food or an edible material.

This ultimately implies that, a product label is a paper document which is used by manufactures to specify the nutrients, chemical elements, and other compounds that were used to make a particular product.

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Non-combustible

eg:-glass,water,stone, Portland cement etc ...

Answer:

Noncombustible

Explanation:

So

Some examples are ,glass ,stone

Answer:

0.258 moles of Oxygen.

Explanation:

Hope this helps! Please let me know if you need more help or think my answer is incorrect. Brainliest would be MUCH appreciated. Have a wonderful day!

Answer:

At the equivalence point, equal amounts of H+ and OH– ions will combine to form H2O, resulting in a pH of 7.0 (neutral). The pH at the equivalence point for this titration will always be 7.0, note that this is true only for titrations of strong acid with strong base.

Explanation:

The volume of the 0.15 M LiOH solution required to react with 50 mL of 0.4 M HCOOH to the equivalence point is 133.3 mL

HCOOH + LiOH —> HCOOLi + H₂O

From the balanced equation above,

The mole ratio of the acid, HCOOH (nA) = 1

The mole ratio of the base, LiOH (nB) = 1

MaVa / MbVb = nA / nB

(0.4 × 50) / (0.15 × Vb) = 1

20 / (0.15 × Vb) = 1

Cross multiply

0.15 × Vb = 20

Divide both side by 0.15

Vb = 20 / 0.15

Vb = 133.3 mL

Thus, the volume of the LiOH solution needed is 133.3 mL

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Answer:

The Equation for this reaction is as follow,

                               2 Cr(ClO₃)₃    →    2 CrCl₃  +  9 O₂

According to eq,

      604.68 g (2mole) of Cr(ClO₃)₃ produces  =  288 g (9 moles) of O₂

So,

                 146.5 g of Cr(ClO₃)₃ will produce  =  X g of O₂

Solving for X,

                             X  = (146.5 g × 288 g) ÷ 604.68 g

                    X  =  69.77 g of O₂

Night vision Goggle's help human to see light in the infrared range of the electromagnetic spectrum.

Night-vision device Goggle is an optical device that is use to view images and allows images to be produced or refracted at different levels of lnfrared light approaching from electromagnetic spectrum.

Therefore, Night vision Goggle's help human to see light in the infrared range of the electromagnetic spectrum

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It's sunny in new york, but it is cool, we will expect to find lizard under a rock or in a hole in the ground.

Lizards are not comfortable in the cold season as they are cold blooded animal, so their body will gets slow in the winter season.

During the winter season or in the cool weather, lizards will go to the places where they faces less cooling. And these places be like inside the rocks, under a hole, under the ground, in the trunks of trees, etc.

Hence, options (1) and (4) are correct.

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The percent yield of H₂O, if 87.0 g of H₂O is produced by combining 95.0 g of O₂ and 11.0 g of H₂ is 87.87%.

Mass of any substance will be calculated by using their moles as:

n = W/M, where

W = given or required mass

M = molar mass

Moles of 95g of Oxygen (O₂) = 95g / 32g/mol = 2.96 moles

Moles of 11g of hydrogen (H₂) = 11g / 2g/mol = 5.5 moles

Given chemical reaction is:
2H₂ + O₂ → 2H₂O

From the stoichiometry of the reaction, it is clear that:

1 moles of O₂ = reacts with 2 moles of H₂

2.96 moles of O₂ = reacts with 2×2.96=5.92 moles of H₂

Here hydrogen is the limiting reagent as it has lower moles and formation of water depends on this only.

2 moles of H₂ = produces 2 moles of water

5.5 moles of H₂ = produces 5.5 moles of water

Mass of 5.5 moles of water will be calculated as:

W = (5.5mol)(18g/mol) = 99g

Given theoretical yield of water = 87g

% yield of water will be calculated as:
% yield = (87 / 99)×100 = 87.87%

Hence required value is 87.87%.

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Answer:

D

Explanation:

Answer:

Cutting the supply of oxygen

Explanation:

We know that a thing need three things to burn

Co_2 stops oxygen supply so fire gets extinguished

A reagent is a compound that is used for the detection of the absence or presence of another substance.

Your information is incomplete as the available reagents aren't given. Therefore, an overview will be given.

Reagents are the integral part of a chemical reaction as they facilitate a reaction. A reagent is usually used tests.

Some typical examples of reagents include Tollens reagent, Fehling's reagent, Million's reagent, etc.

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The reagents that would be used to convert cyclohexanone to the following compound: hydrogen cyanide, potassium cyanide, and H₃O⁺, heat.

It is an organic compound with a chemical formula [tex]\rm (CH_2)_5 CO[/tex].

The cyclohexanone is used as Insecticides, paint and varnish remover, synthetic resins, etc.

It is not harmful to humans and animals, inhalation cause irritation.

Thus, the compound: hydrogen cyanide, potassium cyanide, and H₃O⁺, heat.

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Answer:

Current randomly flows around the circuitt

Answer:

B. Current always follows the path of least resistance.

Explanation:

A short circuit occurs when the current finds a way to bypass the appliance on a path that has little or no resistance. When one path through the circuit has 0 resistance (a short circuit), current follows the path of least resistance only.

Answer:

Sound does not travel at all in space. The vacuum of outer space has essentially zero air. Because sound is just vibrating air, space has no air to vibrate and therefore no sound.

rate brainliest!

Answer: I learned that almost every technology has radio waves that spread out from their sources.

Explanation:

Answer:

absorbed

Explanation:

Different colors of light can be reflected or absorbed and that determines color. For instance an object that absorbs every color but green will appear green to the human eye.

The statement 'whether people should take medicine or if they should seek alternative treatments' describes an ethical dilemma that drug designers face.

Drug development refers to all the processes from target drug identification to drug validation and commercialization.

Drug development involves different stages of development including preclinical and clinical trials.

Ethical dilemmas in drug development include the release of a drug that is ineffective when compared to parallel treatments.

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Answer:

A drug for blood pressure is absorbed in the colon. It is effective, but occasionally it can erode the colon walls.

Explanation:

i just took the test and got it right.... i hope this helps :)

The formal charge on each atom can be known by counting up the number of valence electrons that is present on each atom.

The term Lewis structure is the representation of a compound using its symbols and showing the valence electrons as dots. This question is incomplete as the Lewis structures were not shown.

If it is shown, we can know the formal charge on each atom by counting up the number of valence electrons that is present on each atom.

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Answer:

We use the following formula as given below Use the formula below to find the lone pair on the oxygen atom of the SO3 molecule. L.P (O) = V.E (O) – N.A (S-O) Lone pair on the terminal oxygen atom in SO3 = L.P (O)

Explanation:

It gets basic

ie ph>7 for basic solutions

Answer:

A reaction is second order with respect to a reactant.

Rate =k[A]

2

(i) If the concentration of the reactant is doubled, the rate of reaction becomes 4 times .

(ii) If the concentration of the reactant is reduced to half, the rate of reaction becomes one fourth.

Explanation:

If a reaction is second-order with respect to a particular reactant, when the concentration of that reactant is increased by a factor of 4, the reaction rate will increased by factor 16.

Rate of the second order reaction will depends on the concentrations of one second-order reactant or two first-order reactants as:
Rate(1) = k[A]²

If the concentration of reactant becomes 4 times the initial concentration then rate will be:

Rate = k[4A]²

Rate(2) = 16k[A]²

Rate(2) = 16Rate(1)

Hence rate will increased by 16 times.

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Answer:

Sample Respond: The nucleus maintains the integrity of genes and controls the activities of the cell by regulating gene expression—the nucleus is, therefore, the control center of the cell.

good luck

Explanation:

I got 100 mark as brainiest

Answer: here's the answer to your question

1.3 ×10¹ is the average reaction rate for O[tex]_2[/tex] in this reaction N2(g) + O2(g) ⟶ 2NO(g).

What is rate of reaction?

The pace during which a chemical response takes place is known as the reaction rate and rate of reaction. It is proportional to the rise in product concentration per unit time and the fall in reactant concentration per unit time. Response times can differ wildly.

For instance, cellulose burns in a fire in a matter of seconds as opposed to the sluggish, years-long oxidative corrosion of iron that occurs under Earth's atmosphere. For the majority of reactions, the rate gets slower as it goes along. By tracking the concentration changes over time, one can calculate the pace of a reaction.

concentration of N[tex]_2[/tex] =0.34/0.75=0.45M

concentration of O[tex]_2[/tex] =0.34/0.75=0.45M

concentration of NO=1.2/0.75=1.6

Kc = [NO]²/ [ N[tex]_2[/tex] ] × [ O[tex]_2[/tex] ]

    =  [0.45]²/ [ 0.45 ] × [ 1.6 ]

    = 1.3 ×10¹

Therefore, 1.3 ×10¹ is the reaction rate.

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Answer:

Explanation:

The volume of Hydrogen and Oxygen molecules are not the same but assuming that they are, the ratio in water which is H2O would be

(c) 2:1