If straight hair (S) is dominant over curly hair (s), can two horses with straight hair produce an offspring with curly hair? Explain your answer.

Answer: C. A child shivering in the cold

Explanation:

Did the test. :)

Answer:

Acid - A compound that increases hydrogen ions (H+) when it is dissolved in a solution

pH - A value from 0 to 14 that is used to specify how acidic or basic a compound is when it is dissolved in water

Base - A compound that increases hydroxide ions (OH−) when it is dissolved in a solution

Litmus paper - Used to measure the pH of substances by determining their hydrogen ion concentration

Answer:

Acid - A compound that increases hydrogen ions (H+) when it is dissolved in a solution

pH - A value from 0 to 14 that is used to specify how acidic or basic a compound is when it is dissolved in water

Base - A compound that increases hydroxide ions (OH−) when it is dissolved in a solution

Litmus paper - Used to measure the pH of substances by determining their hydrogen ion concentration

Explanation:

Answer:

He has a deep respect for the horse,so he treats him with care

Answer:

It's C

Explanation:

Good luck on the test.

An Arrhenius acid is a substance that dissociates in water to form hydrogen ions or protons.

An Arrhenius acid increases the number of\(H^+\) ions in the water.

According to the Arrhenius theory, a substance which has hydrogen atom and can easily give hydrogen ion or proton in its aqueous solution is called as Arrhenius acid.

For example, when hydrochloric acid is dissolved in water, it forms chloride ion (\(Cl^-\)) and hydronium ion (\(H_3O^+\)).

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Answer:

B

Explanation:

To solve this we must be knowing each and every concept related to cell. Therefore, the correct option is option B among all the given options.

Cells are the fundamental building elements of all life. Trillions of cells make up the human body. They support the body's structure, absorb nutrients from meals, transform those calories into energy, and perform specific activities.

Cells are made up of many different elements, each of which serves a specific purpose. Some of these sections, known as organelles, have specialized structures that carry out specific functions within the cell. Molecules of the gas pass between the phospholipids of the cell membrane explains how a cell gets rid of carbon dioxide gas.

Therefore, the correct option is option B.

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Answer:True i believe

Explanation:

Answer:

B) 22 atoms

Explanation:

Aluminum Acetate has a formula of C6H9AlO6, meaning that it has 6 Carbon atoms, 9 Hydrogen atoms, 1 Aluminum atom, and 6 Oxygen atoms.

In total there are: 6+9+1+6 atoms, or a total of 22 atoms.

Hope this helps!

Answer:

The molecular or chemical formula of Aluminium Acetate is C6H9AlO6.

6-carbon atoms

9-hydrogen atoms

6-oxygen atoms

1-aluminium atom

b. 22 is the right answer

The melting of glaciers at the poles during the summer months has the potential to lower the salinity of the surrounding ocean water. Option A is correct.

This is because glaciers are formed from frozen freshwater, which has a lower salt concentration than seawater. As the glaciers melt, they release freshwater into the ocean, which mixes with the saltwater and dilutes the overall salt concentration, resulting in a lower salinity.

It's worth noting that the impact of glacial melting on ocean salinity is not uniform throughout the ocean, as the mixing and circulation of ocean currents can cause variations in salt concentration.

Additionally, factors such as evaporation, precipitation, and the influx of saltwater from rivers and streams can also affect ocean salinity.

Hence, A. lowers salinity is the correct option.

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Nitinol, a shape memory alloy, is unique in its response to temperature compared to other metals.

Nitinol is composed of a nickel-titanium (Ni-Ti) alloy and exhibits a phenomenon called shape memory effect and superelasticity. These properties arise from the unique crystal structure and phase transitions of the alloy.

One key characteristic of Nitinol is its ability to undergo a reversible transformation between two crystal structures, known as austenite and martensite, in response to temperature changes. The transition temperature at which this transformation occurs is called the martensitic transformation temperature.

At temperatures below its martensitic transformation temperature, Nitinol exhibits a soft and easily deformable martensitic phase. However, when heated above its transformation temperature, Nitinol rapidly reverts to its rigid and predefined shape of the austenitic phase.

This temperature-dependent behavior of Nitinol is in contrast to other metals that do not exhibit such reversible shape memory effects or superelasticity. While most metals undergo gradual changes in their physical properties with temperature, Nitinol's unique alloy composition allows it to exhibit significant and reversible changes in shape and mechanical properties based on temperature fluctuations.

The distinct response of Nitinol to temperature makes it a valuable material in various applications, including biomedical devices, aerospace engineering, and robotics.

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When a nitrile is treated with LiAIH4, followed by water, an amine is obtained.

A nitrile is a functional group that consists of a carbon triple bond to a nitrogen atom (-C≡N), which can be converted to an amine group (-NH2) via reduction using a strong reducing agent, lithium aluminum hydride (LiAIH4), and subsequent hydrolysis with water. The reaction is shown below:

RC≡N + 4[H] ⟶ RCH2NH2

When a nitrile is reduced with LiAIH4, it produces the corresponding imine, which is then hydrolyzed with water to form the corresponding primary amine. The mechanism of the reaction involves the transfer of a hydride ion (H-) from LiAIH4 to the nitrile carbon, followed by the addition of a water molecule to the imine carbon, and finally protonation of the intermediate to give the corresponding primary amine.

Therefore, the correct option is An amine is obtained when a nitrile is treated with LiAIH4, followed by water.

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The student should take the average of the results from all four trials to obtain the highest level of accuracy.

Chemistry's definition of accuracy is how closely a measurement resembles the actual value.

Three categories of accuracy exist:

1) Point accuracy signifies that accuracy is present only at that scale point.

It provides no details regarding the instrument's accuracy.

2)Percentage of true value - The accuracy is assessed by identifying the instrument's accuracy and contrasting it with the true value that was measured.

3)Percentage of scale range – The accuracy is what determines the measurement's accuracy.

Up to 0.5 percent of instrument accuracy is disregarded. By taking multiple measurements and accounting for human error, measurement accuracy can be improved.

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This is because side reactions and unwanted byproducts are often favored at higher temperatures.

To avoid the formation of a side product in this experiment, the best approach would be to keep the reaction at a low temperature and avoid overheating the product during distillation. This is because side reactions and unwanted byproducts are often favored at higher temperatures. By maintaining a low temperature, the reaction can be controlled to favor the desired product and minimize the formation of side products.

Drying the aqueous layer, using pure sodium iodide, using pure silver nitrate, and venting the gases out of the separatory funnel are not specifically related to preventing the formation of side products in this context. They may be relevant for other aspects of the experiment, but they would not directly address the formation of side products.

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Answer:0

Explanation: zero because it is the most stable form of oxygen in its standard state

Answer:

A.) 0.43 g

Explanation:

Before you can calculate the mass, you need to find the moles. You can do this by using Avogadro's Law:

V₁ / n₁ = V₂ / n₂

In this equation, "V₁" and "n₁" represent the first balloon's volume and mole value. "V₂" and "n₂" represent the second balloon's volume and mole value. Since you are searching for the first balloon's mole value, you can plug the other values into the equation and simplify to find n₁.

V₁ = 1.54 L                         V₂ = 0.72 L

n₁ = ? moles                      n₂ = 0.100 moles

V₁ / n₁ = V₂ / n₂                                               <----- Avogadro's Law

1.54 L / n₁ = 0.72 L / 0.100 moles                 <----- Insert values

1.54 L / n₁ = 7.2                                              <----- Simplify right side

1.54 L = 7.2 x n₁                                              <----- Multiply both sides by n₁

0.214 = n₁                                                       <----- Divide both sides by 7.2

Now, you can find the mass using the molar mass of the gas. Remember, hydrogen exists as a diatomic molecule.

Atomic Mass (H₂): 2(1.008 g/mol)

Molar Mass (H₂): 2.016 g/mol

0.214 moles He            2.016 g
--------------------------  x  -----------------  =  0.43 g H₂
                                       1 mole

Answer:

Water is a remarkable substance, and its unique properties are largely due to the presence of polar covalent bonds and hydrogen bonds in its structure. These characteristics play a crucial role in the physical and chemical properties of water, making it essential for life as we know it.

Explanation:

The polar covalent bonds in water arise from the unequal sharing of electrons between oxygen and hydrogen atoms. This results in the oxygen atom having a partial negative charge (δ-) and the hydrogen atoms having partial positive charges (δ+). These charges create polarity within the water molecule, leading to the formation of hydrogen bonds.

Hydrogen bonds occur when the partially positive hydrogen atom of one water molecule is attracted to the partially negative oxygen atom of another water molecule. These hydrogen bonds are relatively weak individually, but when present in large numbers, they contribute to the cohesion, surface tension, and high boiling point of water.

The importance of these bonds is manifold. The cohesion between water molecules due to hydrogen bonding enables water to form droplets, have a high surface tension, and flow freely, facilitating transport within organisms and in the environment. Additionally, hydrogen bonding leads to the high specific heat capacity and heat of vaporization of water, making it an effective regulator of temperature in living organisms and ensuring stable environmental conditions.

Furthermore, hydrogen bonds play a crucial role in the unique properties of water as a solvent. The polar nature of water allows it to dissolve a wide range of substances, including ionic compounds and polar molecules, facilitating various biological processes such as nutrient transport and chemical reactions in cells.

Based on these characteristics, the chemical compound described could potentially be sodium carbonate (Na2CO3). Sodium carbonate is a white crystalline solid, soluble in water, and has a pH around 8.

To identify a chemical composition based on the given characteristics, we can consider the properties and reactions described:

White, crystal solid, dry: This indicates that the compound is a solid substance with a white color and a crystalline structure when in a dry state.

Soluble: This suggests that the compound can dissolve in a solvent, indicating it is likely an ionic compound or a polar covalent compound.

pH ≈ 8: The pH value around 8 indicates that the compound is slightly basic.

Forms a gas when reacted with sulfuric acid and lit: This observation suggests that the compound reacts with sulfuric acid to produce a gas. It could potentially be an acid or a carbonate compound.

Forms a pasty precipitate when reacted with NaOH: The formation of a pasty precipitate indicates that the compound reacts with sodium hydroxide, likely forming an insoluble hydroxide compound.

When reacted with sulfite, it gives a holographic look and smells like chlorine: This characteristic suggests that the compound reacts with sulfite to produce chlorine gas, which exhibits a distinct odor.

Based on these characteristics, the chemical compound described could potentially be sodium carbonate (Na2CO3). Sodium carbonate is a white crystalline solid, soluble in water, and has a pH around 8. It reacts with sulfuric acid to produce carbon dioxide gas and water. It forms a pasty precipitate of sodium hydroxide when reacted with NaOH. When reacted with sulfite, it produces chlorine gas, which can give a holographic appearance and smell like chlorine. However, it is important to conduct further tests and confirmatory experiments to accurately identify the compound.

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Answer:

makwe me brainliest pls hope it helps;)

Explanation:

Neutrons are electrically neutral, but contribute to the mass of a nucleus to nearly the same extent as the protons. Neutrons can explain the phenomenon of isotopes (same atomic number with different atomic mass). The main role of neutrons is to reduce electrostatic repulsion inside the nucleus

The gravity force on an object from the Earth is the same regardless of whether the object is surrounded by air .

the Earth has an average gravitational force. Different locations on Earth have gravitational forces that are larger or smaller than average. This is because each location has more or less mass than the average

The following sets of elements have the same number of valence electrons : B, Al, Ga because they are in the same group

In an atom, there are levels of energy in the shell and subshell  

This energy level is expressed in the form of electron configurations.  

Valence electrons are electrons used in a chemical bond , and in an atom's outermost energy level  

The periodic system of elements is an arrangement of elements classified based on similar properties and their atomic number order.  

The periodic system is divided into groups (vertical order) and periods (horizontal order)  

Tn the periodic system

In one group will have the same number of valence electrons (except the He element in group VIIIA and the elements in the transition group), while in one period will have the same number of shells

B, Al, Ga because they are in the same group

Electron configuration :

₅B = 2 3

₁₃Al = 2 8 3

₃₁Ga = 2 8 18 3

₄₉In = 2 8 18 18 3

₈₁Tl = 2 8 18 32 18 8 3

The configuration above shows that the valence electrons from group 3 are the same, i.e. 3 electrons

The sets of elements have the same number of valence electrons is Boron, aluminum and galium.

Those electrons which are present on the outer most shell of an atom will known as valence electrons.

In the periodic table elements are arranged in the increasing order of their atomic number and arranged in different periods and groups. Elements of the same group will have the same number of valence electrons. Boron, aluminum and galium are belongs from the same group i.e. 13th group of the p-block elements and will have same valence electrons.

Hence option (2) is correct.

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The electronegativity of hydrogen is 2.0, while that of oxygen is 3.5.

Electronegativity is a chemical property that describes an atom's or functional group's tendency to attract electrons toward itself. An atom's electronegativity is affected by both its atomic number and the distance between its valence electrons and the charged nuclei.

It governs the distribution of shared electrons between two atoms in a bond. The greater an atom's electronegativity, the more strongly it attracts electrons in its bonds. The electronegativity of hydrogen is 2.0, while that of oxygen is 3.5. Because the difference in electronegativities is 1.5, water is a polar covalent molecule. This means that electrons are strongly attracted to the more electronegative element, but the atoms are not ionized.

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Answer:

A

Explanation:

In a cold front set-up, the boundary between the cold and warm air masses is relatively steep, typically causing the warm air in front of it to rise rapidly.

A cold front has been the transition zone that includes the replacement into the warmer zones. The cold air mass will be settled at the bottom and pushes the warm air to rise. Thus, option A is correct.

A cold front is said to be the bad weather conditions that are has been constituted by the cooler air mass. It is cold and dry air that moves from the "northwest to the southeast" direction. In an occluded front, the cold front meets the warm front.

When the cold air front meets the warm air front then, the cold air being denser settles at the bottom and results in pushing the warm air front in an upwards direction. The warm front has less dense air that rises in an upward direction.

Therefore, option A. the cold front moves the warm front in the upper direction.

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Answer:

The height of a column of ethanol is 13.1m

Explanation:

we begin by converting the density to SI unit= 0.789g/cm3* 1kg * \(100^{3}\)* \(cm^{3}\)

                                                                               cm * 1000g * \(1^{3}m^{3}\)

                                                            = 789kg/m3

converting pressure to SI unit= 1 atm =101325 Pa

hence P= hdg

g= 9.81 m/s2

making h the subject of the formula

h= P/dg

h= 101325Pa/ 789kg/m3 * 9.81 m/s2

h= 13.1m

70.9-gram sample of \(Cl_{2}\) gas will occupy Opton C. 22.4 liters at STP.

To determine the volume occupied by the sample of \(Cl_{2}\) (g) at STP, we can use the ideal gas law equation, PV = nRT

where P = pressure

V = volume

n = number of moles

R = ideal gas constant

T = temperature.

At STP (Standard Temperature and Pressure), the pressure is 1 atmosphere (atm) and the temperature is 273.15 Kelvin (K).

First, calculate the number of moles of \(Cl_{2}\) (g) using its molar mass. The molar mass  \(Cl_{2}\) is 70.9 grams/mol.

Number of moles (n) = mass (m) / molar mass (M)

n = 70.9 g / 70.9 g/mol

n = 1 mol

Now, we can calculate the volume using the ideal gas law:

V = (nRT) / P

V = (1 mol * 0.0821 L·atm/mol·K * 273.15 K) / 1 atm

V ≈ 22.4 L

Therefore, the correct answer is C. 22.4 L.

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The titration of the weak acid and strong acid solutions with NaOH will yield different results due to their differing acid strengths.

Then the weak acid only partially dissociates in water, meaning it has a lower concentration of H+ ions than a strong acid. As NaOH is added, the H+ ions react with the OH- ions to form water, which decreases the concentration of H+ ions and slows down the titration.

That the pH curve for the weak acid will be less steep compared to the strong acid due to the weaker dissociation. This means that the pH of the solution will change more slowly as NaOH is added, making it more difficult to accurately determine the equivalence point.

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When titrating a weak acid and a strong acid with NaOH solution of the same concentration, the weak acid will require a larger volume of NaOH to reach the equivalence point compared to the strong acid.

This difference is due to the nature of the acids being titrated. A strong acid completely dissociates in water, producing a higher concentration of H+ ions, which react with OH- ions from the NaOH solution.

A weak acid, on the other hand, only partially dissociates in water, producing a lower concentration of H+ ions. During titration, the NaOH solution reacts with both the H+ ions from the weak acid and the buffer system formed by the weak acid and its conjugate base. This means that a larger volume of NaOH is needed to consume the H+ ions and the buffer system to reach the equivalence point in the weak acid titration.
The volume of NaOH solution required to titrate a weak acid will be greater than the volume needed to titrate a strong acid of the same concentration, due to the presence of a buffer system in the weak acid solution.

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The number of moles present in 32.5 g of AICI3 is approximately 0.244 mol. The correct answer is A.

To determine the number of moles present in 32.5 g of AICI3, we need to use the molar mass of AICI3 and the given mass. The molar mass of AICI3 is calculated by adding the atomic masses of all the atoms in the compound:
Aluminum (Al) = 26.98 g/mol
Chlorine (Cl) = 35.45 g/mol
Therefore,
Aluminum (Al) = 26.98 g/mol
Chlorine (Cl) = 35.45 g/mol
3 Chlorine atoms (3 x 35.45 g/mol) = 106.35 g/mol
So, the molar mass of AICI3 is the sum of these values:
Molar mass of AICI3 = 26.98 g/mol + 106.35 g/mol
= 133.33 g/mol
Now, we can use the formula:
Number of moles = Mass / Molar mass
Substituting the given values, we get:
Number of moles = 32.5 g / 133.33 g/mol
= 0.24375 mol
Therefore, the number of moles present in 32.5 g of AICI3 is approximately 0.244 mol. The correct answer is A.

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