Predict the effect of a mutation which limits the production of pigment in hair

Salt and sugar have strong attractive forces whereas oil has weak attractive forces between particles.

The attractive forces between particles in the salt and sugar substances have strong because of its solid state while on the other hand, the attractive force between particles of oil is weak because of its liquid state.

So we can conclude that salt and sugar have strong attractive forces whereas oil has weak attractive forces between particles.

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The strength of the attractive forces between the molecule of oil, sugar and salt increases from oil to sugar to salt.

The melting point of a substance is the temperature at which the solid substance melts.

The melting point of a substance is a constant for a pure substance.

The higher the attractive forces between the molecules of a substance, the higher the melting point will be.

Between the three substances, oil has the lowest melting point while salt has the highest melting point.

Therefore, the strength of the attractive forces between the molecule of oil, sugar and salt increases from oil to sugar to salt.

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The set of coefficients that will balance the chemical equation are: B.) 1, 2, 2, 1

Chemical reactions are processes that cause one set of chemical elements to change into another set of chemical elements. During chemical reaction, atoms are rearranged, bonds between atoms are broken and formed and then new compounds or molecules are produced.

Chemical reactions can be represented using the chemical equations, that show reactants and products.

The balanced chemical equation for the given reaction is: H₂SO₄ (aq) + 2NH₄OH (aq) ---> 2H₂O (l) + (NH₄)2SO₄ (aq)

Therefore, the set of coefficients that will balance the chemical equation are: 1, 2, 2, 1.

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Answer:

How many moles of each element are in one mole of Be (OH)2? 1 mole of beryllium, 1 mole of oxygen, 2 moles of hydrogen 1 mole of beryllium, 2 moles of oxygen, 2 moles of hydrogen CORRECT ANSWER 2 moles of beryllium, 2 moles of oxygen, 2 moles of hydrogen

Explanation:

Mole measure the number of elementary entities of a given substance that are present in a given sample. Therefore, 1 moles of beryllium,  2 moles of hydrogen and 2 moles of oxygen  are in one mole of Be(OH)\(_2\).

The SI unit of amount of substance in chemistry is mole. The mole is used to measure the quantity or amount of substance. We know one mole of any element contains 6.022×10²³ atoms which is also called Avogadro number.

Mathematically, the formula for mole is given as

number of moles of element=given mass of element÷ molar mass of element

1 moles of beryllium, 2 moles of hydrogen and 2 moles of oxygen  are in one mole of Be(OH)\(_2\).

Therefore, 1 moles of beryllium,  2 moles of hydrogen and 2 moles of oxygen  are in one mole of Be(OH)\(_2\).

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Pairs of molecules that have the same electron groups but different geometries include SO2 and CO2.

Both SO2 (sulfur dioxide) and CO2 (carbon dioxide) have the same electron groups, as they both possess three electron groups around the central atom.

However, their geometries differ due to the presence of lone pairs.

In SO2, there is one lone pair on the sulfur atom, resulting in a bent geometry.

In CO2, there are no lone pairs on the carbon atom, resulting in a linear geometry.

Summary: SO2 and CO2 are examples of molecules with the same electron groups but different geometries due to the presence or absence of lone pairs.

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Answer: high temperatures

Explanation:

It varies.

It is the simplest whole number ratio of elements in a compound. Molecular formula is n times the empirical formula where n is integers 1,2,...The empirical formula is S₂O4.

Empirical formula gives the proportion of the element that is present in a compound. It does not give information about the actual number or the arrangements of the atoms.

The relation between emperical formula and molecular formula is given as

n=Molar mass ÷empirical formula molar mass    (1)

Where n= integers 1,2,3.....

Molar mass =128 g/mol

Empirical formula molar mass of SO₂=molar Mass of sulphur+2×Molar mass of oxygen                                                                                             (2)

Molar mass of sulfur= 32g/mol

molar mass of oxygen = 16g/mol

substituting the values in equation 2 we get

Empirical formula molar mass of SO₂=32g/mol+2× 16g/mol= 64g/mol

Substituting the values in equation (1) we get

n=128 g/mol÷ 64g/mol

n=  2

Molecular formula= n× empirical formula

                                = 2×SO₂

                                = S₂O4

Thus the molecular formula is S₂O4.

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Answer:

d) Mass = 460 g      

Explanation:

Given data:

Mass of N₂O₄ produced = ?

Number of moles of NO₂ consumed = 10 mol

Solution:

2NO₂     →        N₂O₄

Now we will compare the moles of NO₂  and   N₂O₄.

                          NO₂         :             N₂O₄

                            2            :                1

                           10            :            1/2×10 = 5 mol

Mass of  N₂O₄ produced:

Mass =  number of moles × molar mass

Mass = 5 mol × 92 g/mol

Mass = 460 g            

Answer:

benefits

1. easier to use

2. save to use

3. saves money

4. helps you picture things in your mind

limitations

1. cannot include all the details

2. models do not behave exactly like the things they represent

Part 1: This diagram depicts an endothermic reaction. Because the products have a higher potential energy than the reactants, energy is absorbed during the reaction.

Furthermore, the energy level of the products is greater than the reaction's activation energy, showing that energy must be given to the system for the reaction to occur.

Part 2: To calculate the total enthalpy change (H) from the diagram, subtract the energy of the reactants from the energy of the products. Because the energy of the products is greater than the energy of the reactants in an endothermic reaction, H will be positive.

To calculate the activation energy (Ea) from the diagram, subtract the energy of the reactants from the energy of the transition state. The activation energy is the smallest amount of energy required for the reaction to occur, hence it is the difference in energy between the reactants and the highest point on the diagram.

Ea will be positive in this situation because energy must be added to the system to achieve the transition state.

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In the reaction \(\text{NO(g)} + \text{CO}_2(\text{g}) \rightarrow \text{NO}_2(\text{g}) + \text{CO}(\text{g})\), nitrogen loses two electrons, and carbon gains four electrons. Therefore, a total of 2 moles of electrons are transferred.

To determine the number of moles of electrons transferred in a reaction, we need to examine the changes in the oxidation states of the elements involved.

In the given reaction: \(\text{NO(g)} + \text{CO}_2(\text{g}) \rightarrow \text{NO}_2(\text{g}) + \text{CO}(\text{g})\)

The oxidation state of nitrogen (N) in NO is +2, and in \(NO_2\), it is +4. Therefore, nitrogen undergoes a change in oxidation state by losing two electrons.

The oxidation state of carbon (C) in \(CO_2\) is +4, and in CO, it is 0. Therefore, carbon undergoes a change in oxidation state by gaining four electrons. Since each mole of electrons corresponds to Avogadro's number (\(6.022 \times 10^{23\)) of electrons, we can conclude that:

Two moles of electrons are lost (transferred) from nitrogen. Four moles of electrons are gained (transferred) to carbon. Hence, in the given reaction, a total of 2 moles of electrons are transferred (lost and gained).

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The order of the steps of glucose utilization by anaerobic metabolism as they occur in the body is as follows:

1, 5, 4, 3 and 2.

Liver releases glucose into the bloodstream or uses it to make glycogen. When oxygen is not present, muscle cells metabolize glucose to pyruvate. Pyruvate is converted to lactic acid which produces a small amount of ATP. Lactic acid accumulates in muscles, and accumulated lactic acid converts to lactate. Liver removes lactate from the blood and can convert it to glucose.

When oxygen is not present in muscle cells, glucose is metabolized by anaerobic metabolism. The steps of glucose utilization by anaerobic metabolism in the body occur in the following order, from bottom to top:

Step 1: Liver releases glucose into the bloodstream or uses it to make glycogen.

Step 2: When oxygen is not present, muscle cells metabolize glucose to pyruvate.

Step 3: Pyruvate is converted to lactic acid which produces a small amount of ATP.

Step 4: Lactic acid accumulates in muscles, and accumulated lactic acid converts to lactate.

Step 5: Liver removes lactate from the blood and can convert it to glucose.

In summary, glucose utilization by anaerobic metabolism occurs when there is a lack of oxygen in the muscle cells. The liver plays a critical role in this process by releasing glucose into the bloodstream, removing lactate from the blood, and converting lactate to glucose. The conversion of pyruvate to lactic acid produces a small amount of ATP, which can provide energy for the body in the absence of oxygen. These steps enable the body to continue functioning even when oxygen is not available.

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Answer:

28

Explanation:

Velocity ratio= Radius of wheel/radius of axle

Radius of wheel= 4.125 inches

Radius of axle= 0.125 inches

Velocity ratio = 4.125/0.125 = 33

Then;

Efficiency = mechanical advantage/velocity ratio × 100

Since the efficiency of the system = 85%

85 = mechanical advantage/33 × 100

Mechanical advantage = 85 × 33/100 = 28

The temperature would have to be raised to approximately 8.64 * n Kelvin.

The temperature to which the volume of oxygen must be raised to give a 2atm pressure can be calculated using the Ideal Gas Law:

PV = nRT

where:

P is the pressure (in atm),

V is the volume (in liters),

n is the number of moles of gas,

R is the gas constant (0.0821 Latm/molK),

T is the temperature (in Kelvin).

Given the initial pressure of 760 mmHg, we can convert it to atmospheres:

760 mmHg * 1 atm / 760 mmHg = 1 atm

And given the initial temperature of 15 degrees Celsius, we can convert it to Kelvin:

15°C + 273.15 = 288.15 K

Rearranging the Ideal Gas Law equation for T and solving for the temperature at 2atm:

T = (PV / nR)

T = (2 atm * 356 cm³) / (n * 0.0821 L * atm / mol * K)

T = (2 atm * 356 cm³ * 1 L / 1000 cm³) / (n * 0.0821 L * atm / mol * K)

T = (2 atm * 0.356 L) / (n * 0.0821 L * atm / mol * K)

T = (0.712 L * atm) / (n * 0.0821 L * atm / mol * K)

T = 8.64 * n K

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The atmosphere of Venus consists maximum of carbon dioxide. The correct option is B.

With extreme surface temperatures approaching 735 K and an atmospheric pressure 90 times that of Earth, Venus's conditions make water-based life as we know it on the planet's surface unlikely.

The atmosphere is also full of carbon dioxide which makes it impossible to sustain life.

Thus, the correct option is B.

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Answer:

reaction to cold pack: change in temperature

Evidence of a chemical reaction etc is change in composition

Explanation: composition is atoms changeing and etc, which is a chemical reacton i think. Change in temperture is alsoa  chemical reaction but cold packs

Answer:

Cold pack: absorbs heat (endothermic reaction)

Hot pack: releases heat ( exothermic reaction)

Explanation:

when a cold pack/hot pack is shaken, water mixes with the chemicals in the outer layer and reacts to release or absorb heat.

1. The answer is 217 K and the law is Charles law.

2. The law that is behind this is the Charles law. The temperature was increased and the volume increased accordingly.

Charles' Law, is a basic gas law in physics and chemistry that explains the relationship between the temperature and volume of a gas at constant pressure.

Charles' Law states that the volume of a gas is precisely proportional to its absolute temperature for a set quantity of gas under a constant pressure.

We know that;

V1/T1 = V2/T2

V1T2 = V2T1

T2 = 200 * 407/375

= 217 K

The law that is involved is Charles law

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Answer:

c

Explanation:

the map shows water near the factories go into moth lake so all of the waist will end up there

Explanation:

By Avagadro's Law,

V¹n¹ = V²n², where P and T are constant.

Therefore (4.00L)(0.200mol) = (3.25L)n²,

n² = 0.246mol. (3s.f.)

P.S. n² does not mean the square of n in this case, it is just a subscript.

Ideal gas law is valid only for ideal gas not for vanderwaal gas. Combined Boyle's and Charles' gas law is used here. Therefore, 0.246mol of gas remain if some of the gas is released and the new volume is 3.25 L.

Ideal gas equation is the mathematical expression that relates pressure volume and temperature.

Mathematically the relation between Pressure, volume and temperature can be given as

PV=nRT

where,

P = pressure of ideal gas

V= volume of ideal gas

n =number of moles of ideal gas

T =temperature of ideal gas

R = Gas constant = 0.0821 L.atm/K.mol

By Avagadro's Law,

V₁n₁= V₂n₂, where P and T are constant.

V₁×n₁= V₂×n₂,

(4.00L)(0.200mol) = (3.25L)n²

n₂ = 0.246mol.

Therefore, 0.246mol of gas remain if some of the gas is released and the new volume is 3.25 L.

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Answer:

The short general principle of solubility states that "like dissolves like." Solvents that have similar polarity or charge to the solute tend to dissolve it more readily.

Solubility is the ability of a substance to dissolve based on chemical nature, intermolecular forces, and "like dissolves like" principle. Factors like particle size, temperature, and pressure affect solubility. It is expressed as the maximum amount of solute that can dissolve in a solvent.

The metabolic process that occurred in the apparatus of the experiment given in the question is photosynthesis. The graphed results of the experiment are related to the process of photosynthesis.

Photosynthesis is the process in which the green plants use the energy of sunlight to convert carbon dioxide and water into glucose and oxygen. In this process, chlorophyll pigment, present in the chloroplasts of the plant cells, captures the energy of sunlight. This captured light energy is used to convert water and carbon dioxide into oxygen and glucose.

In the experiment mentioned above, the metabolic process that occurred in the apparatus is photosynthesis. It is because spinach leaves were used in the experiment to observe the amount of oxygen (O2) and carbon dioxide (CO2) present in the leaves.

The graphed results of this experiment show that the amount of oxygen in the leaves increased over time while the amount of carbon dioxide decreased. This is because the leaves absorbed carbon dioxide from the air and converted it into glucose and oxygen through the process of photosynthesis. As a result, the amount of oxygen increased over time, and the amount of carbon dioxide decreased. Hence, it can be concluded that the graphed results of the experiment are related to the process of photosynthesis.

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ANSWER

Water molecule is a compound

EXPLANATION;

Water molecule is formed from the combination of oxygen and hydrogen atoms

Recall, that compound is the combination of two or more elements that are chemically combined together

Therefore, water molecule is a compound

n this questions certain

a

r

e

g

i

v

e

n

,

of moles ,n = 21 mol, Pressure P = 78 atm, Temperature T = 900 K, Volume V = ?

We have to calculate the volume of the given moles of gas at specific temperature and pressure.

Using Ideal Gas equation;

PV = nRT

V = nRT /P ( R = gas constant = 0.08206 L atm

m

o

l

−

1

K

−

1

)

V= 21 mol x 0.08206 L atm

m

o

l

−

1

K

−

1

x 900K / 78 atm

V= 73.854 L atm / 78 atm = 0.946 L

Answer:

Answer is:C

Explanation:

hope this helps

The particle model diagram represents only one compound composed of elements X and Z  is option C.

An elements are defined as a pure substance containing of only one type of atom which all have same numbers of protons in their nuclei.  

A substance that cannot be converted into another substance is known as an element. Each of the approximately 100 elements has a unique form of atom.

Compounds are defined as a material formed by chemically bonding two or more chemical elements.

It can also be defined as a chemical compound made up of several similar molecules (or molecular entities) that include atoms from different chemicals.

There are basically four types of compounds.

Thus, the particle model diagram represents only one compound composed of elements X and Z  is option C.

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Work function gives the work required for an electron to be emitted from a surface. The work function emitted with photoelectrons of kinetic energy 1.05 eV is 4.74eV.

The photoelectric effect is the emission of an electron by the projected beam of light with energy greater than the work function.

The photoelectric effect is given as,

E = φ + KE

Given,

Kinetic energy of photoelectrons = 1.682 10⁻¹⁹ J (as, 1eV = 1.602 x 10⁻¹⁹ J)

Frequency = 1.40x10¹⁵ s⁻¹

Work function (φ) =?

The work function with respect to frequency is given as,

(6.623 x 10⁻³⁴Js)(1.40x10¹⁵ s⁻¹) = φ + 1.682 x 10⁻¹⁹ J

φ = (9.272 x 10⁻¹⁹) - (1.682 x 10⁻¹⁹)

φ = 7.590 x 10⁻¹⁹ J

Work function in eV is converted as, 1eV = 1.602 x 10⁻¹⁹ J

= 4.74 eV

Therefore, the work function is 4.74eV.

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The nuclear reaction process of converting hydrogen nuclei into helium nuclei is called the proton-proton chain.

The proton-proton chain is the primary nuclear reaction process that powers the Sun and other main-sequence stars. It involves the fusion of hydrogen nuclei (protons) to form helium nuclei. The chain consists of several steps, each involving different nuclear reactions.

In the first step of the proton-proton chain, two protons (hydrogen nuclei) come together through the strong nuclear force to form a deuterium nucleus (one proton and one neutron). This step releases a positron and a neutrino as byproducts. In the next step, the deuterium nucleus combines with another proton to form a helium-3 nucleus. This step releases a gamma ray.

The final step of the proton-proton chain involves the fusion of two helium-3 nuclei to produce helium-4 (two protons and two neutrons). This step releases two protons, which can then continue to participate in further reactions. Overall, the proton-proton chain converts four hydrogen nuclei into one helium nucleus, releasing a tremendous amount of energy in the process.

The proton-proton chain is essential for the sustained energy output of stars like the Sun. Without this chain reaction, stars would not be able to generate the immense heat and light that they emit. Understanding the proton-proton chain and other nuclear reactions is crucial for studying stellar evolution and the processes that govern the energy production within stars.

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Answer: All cells are made from the same major classes of organic molecules: nucleic acids, proteins, carbohydrates, and lipids.

Explanation: please mark as brainliest