What is the condensed formula for 2-pentyne??

Answer:

B the atmosphere it's not on earth and I'm pretty sure  the atmosphere doesn't have water in

Explanation:

Answer:

5.47 x 10^23 atoms in Ag (sliver)

Explanation:

0.909 mol of Ag x 6.02 x 10^23 atoms of Ag/ 1 mol of Ag

Answer:

Q = 30 calories

Explanation:

We have,

The specific heat of ice is 0.5 calories/gram.

The heat require to raise the temperature is given by :

\(Q=mc\Delta T\)

m = 60 grams, c = 0.5 calories/gram °C, \(\Delta T=1\ C\)

So,

\(Q=60\times 0.5\times 1\\\\Q=30\ \text{calories}\)

So, 30 calories of heat is required to raise the temperature by 1 C.

To calculate the moles of anhydrous salt, divide the molar mass by the molar mass of the anhydrous salt.

The molar mass of an anhydrous salt is the sum of the molar mass of each of its components.

To determine the smallest whole number ratio of moles of water to moles of anhydrous salt, divide the number of moles of water by the number of moles of anhydrous salt.

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Answer:

why

xy=gh

Explanation:

common science

In organic chemistry, an aldol condensation is a condensation reaction in which an enol or enolate ion combines with a carbonyl chemical to produce a -hydroxyaldehyde or -hydroxyketone, which is then dehydrated to produce a conjugated enone.

Aldol condensations are significant in the synthesis of organic compounds because they offer a reliable method for forming carbon-carbon bonds. Aldol condensation, for instance, occurs during the Robinson annulation reaction sequence, and the Wieland-Miescher ketone product is a crucial building block in numerous chemical syntheses. Aldol condensations are frequently studied as a useful bond-forming reaction that exemplifies significant reaction mechanisms in university-level organic chemistry coursework. in the standard form.

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Answer: what question?

Explanation:

Answer:

theirs no question

Explanation:

no question or picture

Answer:

Study Island:

The answer is...

C.  The test variable (independent variable) and outcome variable (dependent variable) have no affect on each other.

Explanation:

The test variable (independent variable) and the outcome variable (dependent variable) have no effect on each other. Hence, option C is correct.

The independent variable can be altered, manipulated and changed in an experimental study.

Researchers often measure independent and dependent variables in studies to test cause-and-effect relationships.

The independent variable is the reason or cause. Its value is independent of other variables.

The dependent variable is the outcome whose values depend on changes in the independent variable.

Hence, option C is correct.

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This peptide is positively charged at physiological pH. In conclusion, SDEKAINVKWQLA and SDEKAINVKWQHA are neutral at physiological pH, SEERAINVAWQHA is negatively charged, and SDEK is positively charged.A peptide is a short chain of amino acids that are joined together with peptide bonds.

The nature of a peptide's charge depends on the overall charges of the amino acids in the sequence. At physiological pH, amino acids will either be positively charged, negatively charged, or neutral, depending on their side chains. Let's examine the peptides provided to determine their charges at physiological pH:SDEKAINVKWQLA: This peptide contains a mix of amino acids with positively charged, negatively charged, and neutral side chains. However, the positively charged amino acid (lysine) and the negatively charged amino acid (aspartic acid) are present in equal amounts.

Therefore, this peptide is considered neutral at physiological pH.SDEKAINVKWQHA: This peptide is similar to the first one but has one less amino acid (alanine instead of leucine at the end). It contains the same number of positively charged and negatively charged amino acids, and so it is also neutral at physiological pH.SEERAINVAWQHA: This peptide contains three negatively charged amino acids (aspartic acid and glutamic acid) and only one positively charged amino acid (lysine). Therefore, the peptide overall is negatively charged at physiological pH.SDEK: This peptide contains both positively charged (lysine) and negatively charged (aspartic acid) amino acids. However, there are more positively charged amino acids in the peptide than negatively charged ones.

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Answer: 2.07 x 10^3 kPa

Explanation:

Answer:

2.07 x 10^3 kPa

Explanation:

Answer: compound thing(picture attached)

Bronze is an alloy made by combining copper and tin. The exact composition of bronze can vary depending on the desired properties, but generally, bronze contains anywhere from 5% to 25% tin.

The reasons why the first humans experimented with making bronze are not fully known, but it is believed that they discovered that adding tin to copper improved its properties, making it harder, more durable, and easier to cast. This would have made it more suitable for weapons, tools, and other objects.

Bronze provided several benefits to early humans. Firstly, bronze tools and weapons were much more durable than those made of pure copper or stone. This made it easier for early humans to hunt, farm, and build, and allowed them to produce more sophisticated and efficient tools. Additionally, bronze objects were more aesthetically pleasing and could be used for decorative purposes. Bronze also played an important role in early trade, as it could be used as a form of currency and was highly valued by many cultures.

In summary, bronze was an important technological advancement in early human history, and its discovery and use played a significant role in the development of human civilization.

Explanation:

15.63 moles of HgO are needed to produce 250. 0 grams of Oxygen.

Moles of any substance can be calculated as:

n =W/M, where

W = given mass

M = molar mass

Given chemical reaction is:

2HgO → 2Hg + O₂

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

2 mole of HgO = produce 1 mole of O₂

Given mass of O₂ = 250 grams

Molar mass of O₂ = 32 g/mole

Mole of produced O₂ = 250g / 32g/mole = 7.81 moles

Now, 7.81 moles of O₂ = produced by 2×7.81 = 15.63 moles of HgO

Hence, option (3) is correct i.e. 15.63 moles is the required moles.

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Ionic compounds are formed when there is a significant difference in electronegativity between the elements involved in the bond. The compound most likely to be ionic among the options given is \(SrBr_2\)(option b).

In \(SrBr_2\), strontium (Sr) is a metal, and bromine (Br) is a nonmetal. Metals tend to lose electrons and form cations, while nonmetals tend to gain electrons and form anions.  In \(SrBr_2\), strontium loses two electrons and forms a 2+ cation (\(Sr^{2+}\)), while bromine gains one electron from each strontium atom and forms a 1- anion (Br-). The resulting compound, SrBr2, consists of positively charged strontium ions (\(Sr^2+\)) and negatively charged bromide ions (Br-), held together by ionic bonds. The other compounds listed, GaAs, \(NO_2, CBr_4\), and H2O, do not exhibit the same characteristics as \(SrBr_2\). GaAs (option a) is a compound formed between a metal (Ga) and a nonmetal (As), but it is a covalent compound rather than an ionic compound. \(NO_2\)(option c), \(CBr_4\)(option d), and H2O (option e) are all covalent compounds formed by sharing electrons between atoms. Therefore, among the options given, \(SrBr_2\)is the compound most likely to be ionic due to the significant difference in electronegativity between strontium and bromine.

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C/ If Fe is greater than Fg, the negatively charged oil droplet will move freely toward the negatively charged plate.

In the Millikan oil droplet experiment, the negatively charged oil droplets are subjected to an electric field created by the charged plates. The electric force (Fe) acts on the oil droplet in a direction opposite to the gravitational force (Fg). When Fe is greater than Fg, the electric force overcomes the gravitational force, causing the negatively charged oil droplet to experience an upward force. As a result, the oil droplet moves freely upward toward the negatively charged plate.

Option B is incorrect because if Fe is equal to Fg, the forces balance each other, resulting in a stationary droplet. However, the question states that Fe is increased until it is greater than Fg, implying that the droplet is no longer stationary but moves in response to the electric force.

Therefore, option C is the correct answer, as it describes the effect of an electric field on the motion of a negatively charged oil droplet in the Millikan oil droplet experiment.

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Answer:

B B B B B B B B B B B B B B B B B B B B B B B B

b is not cell theory

Answer:the liquid

Explanation: its harmful

The mass balance equation is 0.15 M = [H₃PO₄] + [H₂PO₄⁻] + [HPO₄²⁻] + [PO₄³⁻] and the charge balance equation is [H₃O⁺] + [K⁺] + [Na⁺] = [H₂PO₄⁻] + 2 × [HPO₄²⁻] + 3× [PO₄³⁻] + [OH⁻]  for a solution containing 0.10 m KH2PO4 and 0.050 m Na2HPO4.

To find out the mass balance and the charge equation

Let's record all the reactions that result in the formation of the solutions and the equilibria that exist within them to aid in our ability to identify the ions that are there. Two soluble salts are dissolving in these reactions.

KH₂PO₄(s) → K⁺ (aq) + H₂PO₄⁻ (aq)

Na₂HPO₄  →  2Na⁺ + HPO₄²⁻

and the processes of acid-base dissociation for H₂PO₄⁻ , HPO₄²⁻ and H₂O

H₂PO₄⁻ + H2O  →   H3O⁺ + HPO₄²⁻

H₂PO₄- + H2O  →  OH⁻ + H₃PO₄

HPO₄²⁻ + H₂O  →   H3O⁺ + PO₄³⁻

2H2O  → H₃O⁺ + OH⁻

Please take note that the base dissociation reaction for HPO4 2⁻  was left out because its byproduct, H2PO4 ⁻, was previously taken into consideration in another reaction. Simple mass balance equations exist for K+ and Na+.

[K⁺] = 0.1M   [Na⁺] = 0.1M

However, the mass balance equation for phosphate requires some consideration. The same ions are produced in solution by H2PO4 and HPO4.

As a result, we can consider that the solution originally contains 0.15 M KH2PO4, which results in the mass balance equation shown below.

0.15 M = [H₃PO₄] + [H₂PO₄⁻] + [HPO₄²⁻] + [PO₄³⁻]

Hence final charge balance equation is

[H₃O⁺] + [K⁺] + [Na⁺] = [H₂PO₄⁻] + 2 × [HPO₄²⁻] + 3× [PO₄³⁻] + [OH⁻]

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Answer:

this is right because carbon and oxygen complete its octet

Answer:

5

Explanation:

Protons are depicted in this picture as +, and the no. of protons are always equal to the no. of electrons (unless it's an ion).

Over here, there are 5 protons therefore there should also be 5 electrons.

The ring rolls slower than the disk when both objects are at rest and roll down a hill together. Option B is correct.

When a ring and a disk roll down a hill together, the ring will roll slower than the disk. This is because the distribution of mass in a ring is different from that of a disk. In a ring, the mass is concentrated towards the outer circumference, while in a disk, the mass is evenly distributed throughout.

As the objects roll down the hill, they convert potential energy into kinetic energy. The rotational kinetic energy of a rolling object depends on its moment of inertia, which is influenced by the mass distribution. Since the mass is concentrated towards the outer circumference of the ring, it has a larger moment of inertia compared to the disk. This higher moment of inertia results in a slower rotation and, therefore, a slower rolling speed for the ring compared to the disk.

Hence, B. is the correct option.

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--The given question is incomplete, the complete question is

"A ring and a disk both at rest roll down a hill together. Which rolls slower? A) disk B) ring C) both roll at the same speed D) not enough information to answer the question."--

The formula below can be used to determine how many radioactive isotopes are left after a specific number of half-lives:

N = N0 x (1/2)^nwhere N0 is the starting number of radioactive isotopes and N is the number of radioactive isotopes left after n half-lives.In this instance, there are 400 radioactive isotopes at the start, and we're interested in finding out how many remain after three half-lives.The quantity of radioactive isotopes left after one half-life is:N1 = N0 x (1/2)^1 = 400 x (1/2) = 200The quantity of radioactive isotopes left after two half-lives is:N2 = N0 x (1/2)^2 = 400 x (1/2)^2 = 100quantity of radioactive isotopes left after three half-lives is:N3 = N0 x (1/2)^3 = 400 x (1/2)^3 = 50Consequently, the response is The formula below can be used to determine how many radioactive isotopes are left after a specific number of half-lives:N = N0 x (1/2)^nwhere N0 is the starting number of radioactive isotopes and N is the number of radioactive isotopes left after n half-lives.In this instance, there are 400 radioactive isotopes at the start, and we're interested in finding out how many remain after three half-lives.The quantity of radioactive isotopes left after two half-lives is:N2 = N0 x (1/2)^2 = 400 x (1/2)^2 = 100The quantity of radioactive isotopes left after three half-lives is:N3 = N0 x (1/2)^3 = 400 x (1/2)^3 = 50As a result, the response is (A) 50. Out of the original 400 radioactive isotopes, 50 are still radioactive after three half-lives.

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Answer:

Please give me the Elements and I will help in the comments!

Explanation:

Hope I can help you!

:)

ANSWER:

What they said

Explanation:

The cultures of prehistoric humans are primarily known through the excavation of stone tools and other durable artifacts, such as the Oldowan and Acheulian tool traditions.

Stone tools and imperishable artifacts serve as key archaeological evidence for understanding prehistoric cultures. Through meticulous excavation and analysis, archaeologists have been able to piece together the lifestyles, technological advancements, and social behaviors of early human societies. The term "paleolithic" refers to the Old Stone Age, a time when humans relied on stone tools as their primary implements.

The Oldowan tool tradition is considered the earliest stone tool industry, dating back around 2.6 million years ago. It is characterized by simple tools, such as choppers and scrapers, which were crafted by flaking off pieces from larger stones. These tools were primarily used for basic activities like butchering and processing animal carcasses.

Later, the Acheulian tool tradition emerged around 1.76 million years ago, representing an advancement in stone tool technology. Acheulian tools, such as handaxes and cleavers, were more refined and standardized, showcasing an increased level of sophistication in tool-making techniques. These tools served a wide range of purposes, including hunting, woodworking, and shaping raw materials.

By studying the Oldowan and Acheulian tool traditions, researchers gain valuable insights into the cognitive abilities, cultural development, and technological progress of early humans. The examination of these artifacts provides evidence of their adaptability, problem-solving skills, and the gradual refinement of their tool-making techniques over time.

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Answer: it’s b)

Explanation: that’s the only difference that is listed

Answer:

I think it is B

Explanation:

B Answer:

Explanation:

Higher, 1020 mb +, rising pressure and temp are associated with clear skies and low precipitation

Answer:

A banana ripening is a chemical change not only because it results in the darkening of the bananas skin, which is a change in color, but also because it changes the texture and taste of the banana on the inside to be softer and sometimes even sweeter!

Explanation:

As a rule of thumb Chemical change: change in color, state (liquid to gas) or is ireversible like burning something. Physical change: Ripping a peice a paper or blowing a balloon up where it can be changed back and isnt permanent.

The Sun is composed of about 75% hydrogen, 25% helium, and trace amounts of heavier elements.

Our Sun is a star and it is the near star to planet Earth. The Sun is also the largest thing in our solar system and it contains most of the mass in the whole solar system. Because the Sun has the greatest mass it also has a substantial force of gravity in the solar system.

Without the Sun's heat and light, the Earth would be a lifeless ball of ice-cover rock. The Sun warms our seas, stirs our atmosphere, causes our weather patterns,

So we can conclude that  At its core, the Sun's temperature extends over 15 million K (27 million°F) and its pressure is over 200 billion times the pressure at Earth's surface.

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Answer:

Healthcare system is one of the most important in any country’s economy.

Health care system Inputs include Medication, patients, locations

Outputs: Treating injured or sick people, taking care of people's health

Side effects: Lack of medication/drugs or no right medication, wrong diagnosis or prescription.

Answer:

B and C

Explanation:

is it multiple choice question??

Van der Waals forces are the interaction between the molecules and the atoms. It increases with an increase in the molecular size and the number of electrons. Thus, options B and C are correct.

Van der Waals forces are the weak forces of attraction and repulsion present between the atoms and the molecules of the compounds. They are also called London Dispersion Forces and dipole-dipole forces.

An increase in the number of electrons and size of the molecule increases the surface area and the electron cloud which in turn, increases the Van der Waals force.

The intermolecular force increases as in large atoms or molecules the valence are held loosely as they are far from the nucleus or the center of the atom.

Therefore, the size and the electron increase the Van der Waals force.

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