Covalent compounds are generally not very hard. Justify the statement.

Answer:

Reflection

Explanation:

Very smooth surfaces such as mirrors reflect almost all incident light.

\(\underline\mathtt\colorbox{gold}{Reflection}\)

Explanation:

Bouncing back of light from a surface is called reflection.

Answer:

I was about t ask the same question lol

Explanation:

Answer:

For flocabulary read and reaspond weather and erosion the answer is : C , i got the answer cause i got it wrong and i answered b so it is c

Explanation:

C is the correct answer

Answer:

Alternative C would be the correct choice.

Explanation:

The other three choices are not related to the given circumstances. So that option C would be the appropriate choice.

A contraption that swiftly prepares food is run by infrared rays. Microwaves employ infrared rays to heat meals by warming any water that may be present.

Numerous food production processes, including drying, boiling, heating, peeling, polyphenol recovery, freeze-drying, antioxidant recovery, microbiological inhibition, sterilizing grains, baking bread, roasting food, making juices, and cooking food, all use infrared technology.

Infrared radiation has the ability to ease or release muscle tension and encourage local blood circulation in the body. Infrared radiation has been used in conventional and modern medicine to treat conditions including autoimmune diseases and issues with wound healing in addition to relieving muscle pain and tension.

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Explanation:

You are suppose to use sig figs.

Sound can move through solids, liquids, and gases. Sound is a mechanical wave that propagates through a medium by causing vibrations or oscillations of particles within that medium.

Solids: Sound can efficiently travel through solids due to the tightly packed arrangement of particles. An example is when tapping one end of a long metal rod and hearing the sound transmitted through the rod.

Liquids: Sound can also move through liquids. For instance, on making sounds near a swimming pool, one can hear the sound underwater.

Gases: Sound can propagate through gases as well. An example is when speaking and hearing in a room.

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Answer:

Physical, Inorganic, Biochemistry, Analytical, and Organic

Physical chemistry deals with applying physics to the study of matter. It's also probably the most important branch. Inorganic chemistry deals with stuff that is chemically composed of elements other than carbon. The branch of Biochemistry concerns itself with living things. Analytical chemistry deals with analyzing and finding out what substances are present in a particular material and how much of each substance is present. Finally, organic chemistry deals with substances that are compounds of carbon.

Explanation:

Answer:

10.66  grams

Explanation:

Answer:

Its a punnet square

Explanation:

Explanation:

Observe the units of all of the prameters to solve this problem

m  *  (28.5-21.5)C  * .450 J/(gC)  = 67.5 J

m * 7 * .450 = 67.5

m = 67.5/(7 * .450) = 21.4 grams

The pressure exerted by a confined gas is the result of Option b. gas particles colliding with the walls of the container.

The pressure exerted by a confined gas is the result of gas particles colliding with the walls of the container. When a gas is confined within a container, the gas particles are in constant motion, moving in random directions with varying speeds. As these gas particles move, they collide with each other and with the walls of the container.

When a gas particle collides with the walls of the container, it exerts a force on the surface. The collective effect of numerous gas particle collisions leads to a net force being exerted on the walls of the container. This force per unit area is what we call pressure.

The more frequently and vigorously the gas particles collide with the walls, the higher the pressure of the gas. Factors that influence gas pressure include the number of gas particles present, their average speed, and the volume of the container. Therefore, Option b is correct.

The question was incomplete. find the full content below:

The pressure exerted by a confined gas is the result of

a. gas particles colliding with each other

b. gas particles colliding with the walls of the container

c. nobody knows, it just is

d. gas particles taking up space in the container.

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Answer:

a liquid

Explanation:

For this section:

(d) To determine which acid would be completely dissociated when dissolved in water, consider the strength of the acid and its ability to ionize completely. Strong acids are those that ionize completely in water, while weak acids only partially dissociate.

Among the given options:

(H O)₂SO is sulfuric acid (H₂SO₄), which is a strong acid and completely dissociates in water.

(H O)IO₃ is iodic acid (HIO₃), which is also a strong acid and completely dissociates in water.

(H O)₂SO₂ is not a known acid and cannot be evaluated for dissociation.

HCO₂H is formic acid (HCOOH), which is a weak acid and only partially dissociates in water.

Therefore, the acids that would be completely dissociated when dissolved in water are (H O)₂SO and (H O)IO₃.

(e) To estimate the pH of the given solutions formed by titration, compare the moles of the acid and base used in the reaction.

(i) For the titration of 25.0 mL of 0.10 M aqueous NaOH with 25.0 mL of 0.10 M aqueous HCl, the reaction between a strong acid (HCl) and a strong base (NaOH) forms a neutral salt (NaCl) and water. The resulting solution would have a pH of 7, indicating neutrality.

(ii) For the titration of 25.0 mL of 0.10 M aqueous NaOH with 25.0 mL of 0.10 M aqueous acetic acid, consider the ionization of acetic acid and the formation of its conjugate base. The pKa of acetic acid is given as 4.76.

Since the volumes and concentrations of the acid and base are equal, we have a 1:1 mole ratio between them. This means that half of the acetic acid will be neutralized, and the remaining half will be in the form of the conjugate base (acetate ion, CH₃COO-). The resulting solution will be a buffer solution with a pH close to the pKa of acetic acid, which is 4.76.

(f) To predict the products formed from mixing the given reagents, we need to consider the reactions and the possible chemical reactions that occur.

(i) 3I₂ + PBr₃: This reaction involves the combination of iodine (I₂) with phosphorus tribromide (PBr₃). The balanced equation is:

3I₂ + 2PBr₃ → 6IBr + P₂

(ii) 4LiH + GaCl₃: This reaction involves the combination of lithium hydride (LiH) with gallium trichloride (GaCl₃). The balanced equation is:

4LiH + GaCl₃ → 4LiCl + GaH₃

(iii) NH₃ + BCl₃: This reaction involves the combination of ammonia (NH₃) with boron trichloride (BCl₃). The balanced equation is:

NH₃ + BCl₃ → NH₃BCl₃

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Answer:

in short weight

Explanation:

weight is mass x gravitational pull on an object

Answer:

+4

Explanation:

Treatment of the ammonium metavanadate with hot hydrochloric acid partly reduces the vanadium to the +4 oxidation state in the form of the VO2+ ion.

In vanadium oxide we increase both sides by 4. And we discover that x is equal to five. The vanadium's oxidation number is + 5.

Loss of electron is called as oxidation. and addition of oxygen molecule is also the oxidation.

When an object comes into touch with oxygen or another oxidizer, a chemical reaction occurs. Rust and the brown color of a sliced apple are both examples of oxidation.

Antoine Lavoisier used the term "oxidation" to describe the reaction of a material with oxygen. The meaning was later expanded to cover additional reactions in which electrons are lost, regardless of whether oxygen was present, after it was realized that the substance loses electrons when it is oxidized.

Thus,  the oxidation number of vanadium in V₂O₅ is + 5.

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Answer:

Answer is D, None of the above :)

Explanation:

There are 0.84 moles of aluminum ions (Al3+) present in 0.42 mol of Al2(SO4)3.

To determine the number of moles of aluminum ions (Al3+) present in 0.42 mol of Al2(SO4)3, we need to consider the stoichiometry of the compound.

The formula of aluminum sulfate (Al2(SO4)3) indicates that for every 1 mole of the compound, there are 2 moles of aluminum ions (Al3+). This means that the mole ratio of Al3+ to Al2(SO4)3 is 2:1.

Given that we have 0.42 mol of Al2(SO4)3, we can calculate the moles of Al3+ as follows:

Moles of Al3+ = 0.42 mol Al2(SO4)3 x (2 mol Al3+ / 1 mol Al2(SO4)3)

Moles of Al3+ = 0.42 mol Al2(SO4)3 x 2

Moles of Al3+ = 0.84 mol Al3+

Therefore, there are 0.84 moles of aluminum ions (Al3+) present in 0.42 mol of Al2(SO4)3.

It's important to note that the stoichiometry of the compound determines the mole ratio between the different species involved in the chemical formula. In this case, the 2:1 ratio of Al3+ to Al2(SO4)3 allows us to determine the number of moles of Al3+ based on the given amount of Al2(SO4)3.

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Answer:

4-methly-2-pentyne

Explanation:

Answer:

Answer is explained in the explanation section below.

Explanation:

This question is requires the diagram, which I have drawn and it is attached in the attachment below. Please for this answer, refer to the diagram attached in the attachment below.

Referring to the diagram, attached. As we know that, Allylic secondary carbocations are more stable than Allylic tertiary carbocations.

Hence,

C2 will have a more positive charge since a tertiary carbocation (C2) is more stable than a secondary carbocation (C4). Therefore, the resonance structure will favor the positive charge at C2.

The resonance structure formed for 2-methyl 1-3 penatdiene are allylic secondary and tertiary carbocation compounds.

Protonation is the addition of hydrogen or the protons to the carbon in an organic compound. The addition of hydrogen takes place at the carbon that forms the stable compound.

The protonation of 2-methyl-1,3 pentadiene is given in the image attached.

The expected carbocation in the structure with the positive charge is C-2, as it forms a more stable product than C-4 due to less repulsion.

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The  third quantum number of a 2p\(^{3}\) electron in phosphorus is ml= -1.

Quantum numbers are the set of numbers describe the position of electron and energy of electron in an atom.there are four types of quantum numbers.

Electronic configuration of phosphorus is 1s\(^{2}\) 2s\(^{2}\) 2p\(^{6}\) 3s\(^{2}\) 3p\(^{6}\)

Quantum numbers for 2p\(^{3}\)

1) Principal quantum number (n) = 2

2) Azimuthal quantum number (l) = (n-1) = 1

3) magnetic quantum number (ml) = -l to +l = -1 , 0 , +1

form the given option , ml = -1  for n= 2 , l = 1

Thus,The third quantum number of a 2p\(^{3}\) electron in phosphorus is m= -1

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Answer: A. m/= -1

Explanation:

Answer:

\(n_{O_2}=3.84molO_2\)

Explanation:

Hello!

In this case, since the combustion reaction of methanol is:

\(CH_3OH+\frac{3}{2} O_2\rightarrow CO_2+2H_2O\)

In such a way, since there is 1:3/2 mole ratio between methanol and oxygen, we can compute the moles of oxygen that are needed to burn 2.56 moles of methanol as shown below:

\(n_{O_2}=2.56molCH_3OH*\frac{\frac{3}{2}molO_2}{1molCH_3OH} \\\\n_{O_2}=3.84molO_2\)

Best regards!

Answer:

ooooo okkk

Explanation:

so if there was acid rain some problems would be like finding food and shelter. the world would go even weirder then it is now lol. but our food would be gone and we would need to adaot and find acid proof shelter. many people would be lost and ya our water would also get poisened ands such

Answer:

Contanimation of food and water sources; this is even more serious because all life is interconnected, and the negative effects of acid rain therefore spread throughout; respiratory problems could arise in people; negative effects on infrastructure (corrosion)

Answer:

gggggggggg

Explanation:

gggggggg

The tripeptide formed from threonine, glycine and alanine is neutral at the pH of 7.3. The carboxylic end is negative charged by donating its proton to form the NH₃⁺ group.

Peptides are protein units formed from two or more amino acids bonded through peptide bonds. There are essential and non-essential amino acids. Essential amino acids have to be uptake from food and non-essential amino acids are synthesized inside the body.

Threonine is an essential amino acid with a CH₃CHOH side group. Glycine has the simplest side group hydrogen and alanine has  CH₃ side chain. Both glycine and alanine are non-essential amino acids.

Each amino acids are represented with a three letter code or one letter symbol. Thus threonine is T,  G for glycine and A for alanine. At a pH of 7.3 the peptide formed from these amino-acids contains a negatively charged carboxylic end.

A positively charged amino end made by protonation from the acid group make the overall charge zero. The structure of the peptide is given in the uploaded image.

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From the question given above, the following data were obtained:

Oxygen = 45.2 Kg

Carbon = 12.6 Kg

Hydrogen = 7 Kg

Nitrogen = 2 Kg

Calcium = 1.3 Kg

Phosphorus = 0.78 Kg

Potassium = 0.25 Kg

Sulphur = 0.18 Kg

Others = 0.60 Kg

Total = 70 Kg

We can obtain the fraction of potassium of the mass of the body as follow:

Potassium = 0.25 Kg

Total = 70 Kg

Fraction of potassium = mass of potassium / Total

Fraction of potassium = 0.25 / 70

Therefore, the fraction of potassium in the body is 1/280

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Answer:

Where is the grahppppp?!!!!

Answer:

Explanation:

1/ I

2/ III

3/ V

4/ II

5/ IV

6/ 5

7/ 55