When looking at an aqueous solution of a weak acid, a lower pH corresponds to:
a) a higher concentration of hydronium
b) a lower concentration of hydronium
c) a higher concentration of hydroxide
d) a more dilute solution

Answer:

The change in smell

Explanation:

chemical reactions ccan lead to change in temperature, change in color and also change in smell

Genocide is a systematic and intentional extermination of a racial, ethnic, religious, or national group. The 10 stages of genocide are Classification, Symbolization, Dehumanization, Organization, Polarization, Preparation, Extermination, Denial, Commemoration and Prevention.

In conclusion, the 10 stages of genocide provide a framework for understanding and recognizing the warning signs of this horrific crime against humanity. By learning about the 10 stages of genocide, we can help prevent future genocides and promote human rights and respect for diversity.

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Answer:

The high melting point is also consistent with its description as an ionic solid. In the crystal, each S2− ion is surrounded by an octahedron of six Ca2+ ions, and complementarity, each Ca2+ ion surrounded by six S2− ions.

Explanation:

You can use the periodic table to predict whether an atom will form an anion or a cation, and you can often predict the charge of the resulting ion. Atoms of many main-group metals lose enough electrons to leave them with the same number of electrons as an atom of the preceding noble gas. To illustrate, an atom of an alkali metal (group 1) loses one electron and forms a cation with a 1+ charge; an alkaline earth metal (group 2) loses two electrons and forms a cation with a 2+ charge, and so on. For example, a neutral calcium atom, with 20 protons and 20 electrons, readily loses two electrons. This results in a cation with 20 protons, 18 electrons, and a 2+ charge. It has the same number of electrons as atoms of the preceding noble gas, argon, and is symbolized Ca2+. The name of a metal ion is the same as the name of the metal atom from which it forms, so Ca2+ is called a calcium ion.

When atoms of nonmetal elements form ions, they generally gain enough electrons to give them the same number of electrons as an atom of the next noble gas in the periodic table. Atoms of group 17 gain one electron and form anions with a 1− charge; atoms of group 16 gain two electrons and form ions with a 2− charge, and so on. For example, the neutral bromine atom, with 35 protons and 35 electrons, can gain one electron to provide it with 36 electrons. This results in an anion with 35 protons, 36 electrons, and a 1− charge. It has the same number of electrons as atoms of the next noble gas, krypton, and is symbolized Br−. (A discussion of the theory supporting the favored status of noble gas electron numbers reflected in these predictive rules for ion formation is provided in a later chapter of this text.)

Answer:

3

Explanation:

the product of the equation includes 6H....so because there are already 2 hydrogens in the reactants, if you have three of those, or 3*2=6....therefore the coefficient should be 3

The correct order of the increasing polarity of the analyte functional group isEthers < Esters.

The given statement is "Polarities of analyte functional group increase in the order of hydrocarbon ethers < esters."  The order of polarities of functional groups is the order of their increasing polarity (i.e., less polar to more polar) based on their electron-donating or withdrawing ability from the rest of the molecule.Polarity of analyte: The analyte's polarity is directly proportional to the dipole moment of the functional group, which is associated with a difference in electronegativity between the atoms that make up the functional group.The electronegativity of an element is its ability to attract electrons towards itself. The greater the difference in electronegativity between two atoms, the more polar their bond, and hence the greater the polarity of the molecule.

To find the correct order of the increasing polarity of the analyte functional group, let's first compare the two groups: hydrocarbon ethers and esters. Here, esters have a carbonyl group while ethers have an oxygen atom with two alkyl or aryl groups. The carbonyl group has more electronegative oxygen, which pulls electrons away from the carbon atom, resulting in a polar molecule. On the other hand, ethers have a less polar oxygen atom with two alkyl or aryl groups, making them less polar than esters. Therefore, the correct order of the increasing polarity of the analyte functional group isEthers < Esters.

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Answer:

79'420J

Explanation:

We know mass 250g and

∆T=98°C -22°C

=76°C

The specific heat capacity for water is 4,18Zj/g°C

THEREFORE

∆H=250g•14,8j/g°C •76°C

=79'420J

Elements which composed of an equal amount of three components protons, neutrons and electrons are considered neutral elements. example of neutral elements are hydrogen, helium, lithium and beryllium...

Depending on the toxin, yes. Many things, including proteins, will surely be denatured or degraded and finally turn harmless if we adopt the colloquial definition of the word and include toxins and poisons.

For instance, ricin, botulinum, tetrodotoxin, etc. They are rather delicate, so I'm hoping this toxin has the lowest shelf life.

For a poison, "not up to quality" might indicate anything. It might be more harmful or less toxic. It might be more toxic than before, which would make it less effective against the intended target but extremely harmful to other species. It only indicates that a single chemical may have begun to breakdown, and the final result of that deterioration may be something entirely else.

Small organic molecules make up a lot of other toxins. These include nerve agents like nicotine, sarin, and VX, all of which are capable of being broken down through air oxidation, UV exposure, hydrolysis, and other processes. Numerous nerve agents have a shelf life of several years, and studies have been done to extend their use in weapons.

Lead, mercury, and cadmium are just a few examples of metals that are hazardous because they are toxic not only in their elemental forms but also as inorganic and organic compounds. Although the toxicity of the various forms can varies substantially (see, for example, methylmercury and elemental mercury), the majority of them are nevertheless at least harmful.

These can persist for a very long period since the reactions that can happen under usual circumstances might not be safe, such as a sizable piece of cinnabar left on a desk even throughout the course of a geological time scale. any substantial modification to ensure safety.

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The equation that has been following the law of conservation has been \(\rm H_2\;+\;Cl_2\;\rightarrow\;2\;HCl\). Thus, option D is correct.

The law of conservation of mass states that in a chemical equation, the atoms of reactants and atoms of products for each elements are equal.

In the given reactions,

A. \(\rm H_2\;+\;Cl_2\;\rightarrow\;HCl\)

The equation has 2 atoms of hydrogen and chlorine at reactant side, while 1 atom on product side. Thus, the equation does not follow the law of conservation.

B. \(\rm H_2\;+\;O_2\;\rightarrow\;H_2O\)

The equation has 2 atoms of hydrogen and oxygen at reactant side, while 1 atom on product side. Thus, the equation does not follow the law of conservation.

C. \(\rm H_2\;+\;O_2\;\rightarrow\;2\;H_2O\)

The equation has 2 atoms of hydrogen and oxygen at reactant side, while 2 atoms of oxygen and 4 atoms of hydrogen on product side. Since, the equation has imbalanced hydrogen it does not follow the law of conservation.

D. \(\rm H_2\;+\;Cl_2\;\rightarrow\;2\;HCl\)

The reaction has 2 atoms of hydrogen and chlorine at reactant side, and 2 atom of each on product side. Thus, the equation does follow the law of conservation.

The equation that has been following the law of conservation has been \(\rm H_2\;+\;Cl_2\;\rightarrow\;2\;HCl\). Thus, option D is correct.

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The molecule or ion with the greatest number of unshared electron pairs around the central atom is XeF₄ (xenon tetrafluoride).

To determine the number of unshared electron pairs around the central atom in a molecule or ion, we need to consider its Lewis structure. In the Lewis structure, we represent the valence electrons as dots or lines around the atoms.

XeF₄ has a central xenon atom (Xe) surrounded by four fluorine atoms (F). Xenon has 8 valence electrons, and each fluorine atom has 7 valence electrons.

When we draw the Lewis structure for XeF₄, we place one fluorine atom on each side of the xenon atom, and we connect them with single bonds (represented by lines).

The remaining 4 valence electrons of xenon are placed as unshared electron pairs (represented by dots) around the xenon atom.

The Lewis structure of XeF₄ is as follows:

 F     F

  \   /

   Xe

  /   \

 F     F

In this structure, xenon has 4 unshared electron pairs (dots) around it. Therefore, XeF₄ has the greatest number of unshared electron pairs around the central atom compared to the other molecules or ions in the list.

Conclusion: XeF₄ (xenon tetrafluoride) has the greatest number of unshared electron pairs (4) around the central atom.

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Atoms of K that are present in 7645.6 grams of K are 1178.03× 10²³.

What  is Avogadro’s number?

Avogadro's number is the number of units in one mole of any substance and equals to 6 .02214076 × 10²³. The units can be electrons, atoms, ions, or molecules.

No. of moles is defined as a particular no. of particles that we can calculate with the help of Avogadro’s number.

Given,

Mass of K = 7645.6 grams

Atomic mass of K = 39.09 g

39.09 g of K has 6 .02214076 × 10²³ atoms

1 g of K will have = 0.154× 10²³ atoms

7645.6 grams of K will have = 1178.03× 10²³ atoms

Therefore, Atoms of K that are present in 7645.6 grams of K are 1178.03× 10²³.

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Answer:

During aerobic cellular respiration, glucose reacts with oxygen, forming ATP that can be used by the cell. Carbon dioxide and water are created as byproducts. In cellular respiration, glucose and oxygen react to form ATP. Water and carbon dioxide are released as byproducts.

Explanation:

In cellular respiration,glucose and oxygen react to form ATP*. Water and Carbon dioxide are released as byproducts.The three stages of aerobic respiration are glycolysis , the krebs cycle , and oxidative phosphorylation.

ATP-Adenosine Triphosphite

the main energy currency of a cell

The heat of reaction for combustion per gram of the fuel is: q = mCpΔT = - d.

The heat of reaction for combustion per gram of the fuel can be calculated using the equation q = mCpΔT, where q is the heat of reaction, m is the mass of the fuel, Cp is the heat capacity of the calorimeter (excluding the water), and ΔT is the change in temperature.

In this case, the mass of the fuel is given and the change in temperature is \(ΔT = Tfinal - Tinitial = -\). The heat capacity of the calorimeter can be determined by measuring the heat capacity of the water (which is known to be d per gram) and subtracting it from the total heat capacity of the calorimeter.

Thus, the heat of reaction for combustion per gram of the fuel is given by q = mCpΔT = - d.

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The first two chemical equations are reversible while the other two are irreversible.

Chemical equation is a symbolic representation of a chemical reaction which is written in the form of symbols and chemical formulas.The reactants are present on the left hand side while the products are present on the right hand side.

A plus sign is present between reactants and products if they are more than one in any case and an arrow is present pointing towards the product side which indicates the direction of the reaction .There are coefficients present next to the chemical symbols and formulas .

The first chemical equation was put forth by Jean Beguin in 1615.By making use of chemical equations the direction of reaction ,state of reactants and products can be stated. In the chemical equations even the temperature to be maintained and catalyst can be mentioned.

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The question is incomplete, the complete question is;

1. Mary and her siblings share similar hair color. Which of these cell components are most involved in determining the hair color of each sibling?

Gene, Chromosome, Nucleus

Cytoplasm, Chloroplasts,Genes

Vacuoles, Nucleus, Chromosomes

Chromosomes, Chloroplasts, Vacuoles

Answer:

Gene, Chromosome, Nucleus

Explanation:

Gene is defined in biology as "a unit of heredity which is transferred from a parent to offspring and is held to determine some characteristic of the offspring" (Oxford Dictionary).

The gene is located in the chromosomes in the nucleus of cells. The sum total of the genes that an organism inherits from its parents is called the organisms' genotype and determines certain features of the organism.

The hair colour of Mary and each of her siblings depends on the genes they received from their parents.

Answer:

48.23 liters.

Explanation:

To calculate the volume of a gas, we can use the ideal gas law equation:

PV = nRT

where P is the pressure, V is the volume, n is the number of moles, R is the universal gas constant, and T is the absolute temperature.

First, we need to convert the temperature to Kelvin by adding 273.15:

T = 61.6°C + 273.15 = 334.75 K

Next, we can substitute the given values into the equation and solve for V:

V = (nRT) / P

V = (1.95 mol * 0.08206 L atm mol^-1 K^-1 * 334.75 K) / (844 mmHg * 1 atm / 760 mmHg)

V ≈ 48.23 L

Therefore, the volume of the gas is approximately 48.23 liters.

Answer:

increases

Explanation:

it turns out that an object increases as the square of it's speed.

Answer:

Explanation:

In all physical processes taking place in closed systems, the amount of change in kinetic energy is equal to the amount of change in potential energy. If the kinetic energy increases, the potential energy decreases, and vice-versa. this equation reveals that the kinetic energy of an object is directly proportional to the square of its speed. That means that for a twofold increase in speed, the kinetic energy will increase by a factor of four. so therfore stays the same as the object so it would speed up as well.

Answer:

A) The solution is highly ionized.

Explanation:

This is because a good conductor of electricity means that there are freely moving charged particles (ions) in the solution.

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Answer:

Algae

Explanation:

Have a good day!

Answer:

Algae

Explanation:

Algae is a plant in the sea and it is a producer

Answer: (A) 1s

Explanation:

The major product of the reaction of 2-bromobutane with sodium methoxide in methanol at 323 K is 2-methoxybutane.

It is necessary to consider the stereochemistry of the reaction.How to draw the major product of the reaction of 2-bromobutane with sodium methoxide in methanol at 323 K?To draw the major product of the reaction of 2-bromobutane with sodium methoxide in methanol at 323 K, first, we need to identify the reactants and the conditions under which the reaction is taking place.2-bromobutane (C4H9Br) is treated with sodium methoxide (NaOCH3) in methanol (CH3OH) at 323 K.

The reaction is a substitution reaction in which the Br group of the 2-bromobutane is replaced by the -OCH3 group of the sodium methoxide.The reaction mechanism is shown below: The major product of the reaction is 2-methoxybutane (C5H12O) as shown below: In 2-methoxybutane, the -OCH3 group is in the axial position and the -CH3 group is in the equatorial position. This is because of the steric hindrance between the -OCH3 group and the -CH3 group in the equatorial position.

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2KNO3 + H2CO3 → K2CO3 + 2HNO3

Answer:

something cyan colored?

Answer:

B. releases, decreases remains the same, increases.

Explanation:

Choosing the material with the highest specific heat capacity is ideal and true.

This is defined as the quantity of heat needed to raise the temperature per unit mass.

Insulators have a higher specific heat capacity as it takes more time for them to absorb heat thereby making it ideal in building an  insulated home.

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The reaction for which ΔH∘rxn is equal to ΔH∘f of the product(s) is 2Na(s) + \(CI_2\)(g) → 2NaCl(s).

The reaction 2Na(s) + \(CI_2\)(g) → 2NaCl(s) satisfies the condition where ΔH∘rxn is equal to ΔH∘f of the product(s). This means that the enthalpy change for this reaction is equal to the standard enthalpy of the formation of NaCl(s).

In general, ΔH∘f represents the standard enthalpy of formation, which is the enthalpy change when one mole of a compound is formed from its constituent elements in their standard states. ΔH∘rxn, on the other hand, represents the enthalpy change for a given reaction.

For the reaction 2Na(s) + \(CI_2\)(g) → 2NaCl(s), the reactants are Na in its standard state (solid) and \(CI_2\) in its gaseous state, and the product is NaCl in its standard state (solid). Since the standard enthalpy of formation of NaCl(s) is defined as zero, ΔH∘rxn for this reaction is also zero, indicating that ΔH∘rxn is equal to ΔH∘f of the product(s).

Enthalpy change and standard enthalpy of formation play crucial roles in understanding the thermodynamics of chemical reactions. The standard enthalpy of formation provides a reference point for measuring the enthalpy change of a reaction. It allows us to calculate the enthalpy change for a reaction based on the difference in the standard enthalpies of the formation of the reactants and products.

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The balanced symbol equation for the Haber process, which is the industrial method for producing ammonia, is N2 + 3H2 → 2NH3

A. The Haber process is the industrial method for producing ammonia, and the balanced equation for the reaction is:

N2 + 3H2 → 2NH3

The atom economy for a product is the percentage of the total mass of reactants that becomes the desired product. For ammonia, the atom economy can be calculated as follows:

Molar mass of NH3 = 14.01 + 3(1.01) = 17.04 g/mol

Atom economy of NH3 = (2 mol NH3 x 17.04 g/mol) / [(1 mol N2 x 28.02 g/mol) + (3 mol H2 x 2.02 g/mol)] x 100% = 34.0%

B. To calculate the theoretical yield of ammonia, we need to use the given mass of nitrogen and the stoichiometry of the balanced equation. The molar mass of nitrogen is 28.02 g/mol, so 27.3 g of nitrogen is equal to:

27.3 g / 28.02 g/mol = 0.974 mol N2

According to the balanced equation, 1 mole of N2 reacts with 3 moles of H2 to produce 2 moles of NH3. Therefore, the theoretical yield of ammonia is:

Theoretical yield of NH3 = (0.974 mol N2) x (2 mol NH3 / 1 mol N2) x (17.04 g/mol NH3) = 33.1 g NH3

C. The percentage yield of the reaction can be calculated by dividing the actual yield of ammonia by the theoretical yield, and then multiplying by 100%. The actual yield of ammonia is given as 29.9 g:

Percentage yield of NH3 = (29.9 g NH3 / 33.1 g NH3) x 100% = 90.4%

D. The percentage conversion of hydrogen can be calculated by dividing the mass of hydrogen used in the reaction by the mass of hydrogen that would have been used if all of it had been consumed in the reaction. The mass of hydrogen used is 10.4 g, and the mass of hydrogen that would have been used if all of it had been consumed in the reaction is:

1( mol H2 x 2.02 g/mol) x (0.974 mol N2 / 1 mol N2) = 1.98 g H2

Therefore, the percentage conversion of hydrogen is:

Percentage conversion of H2 = (10.4 g H2 / 1.98 g H2) x 100% = 525% (This result is not possible, as the percentage conversion cannot be greater than 100%. It is likely that there was an error in the calculation or in the data provided.)

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Density is defined as the mass per unit volume of a substance. The formula for density is: density = mass / volume. Therefore, the density of the sample is 8 g/cm³.

Given that the mass of the material is 48 grams and the volume is 6 cubic centimeters, we can use the formula to calculate the density:

density = 48 g / 6 cm³

Simplifying the expression, we get:

density = 8 g/cm³

Therefore, the density of the sample is 8 g/cm³.

Density is a physical property of matter that describes how much mass is contained within a given volume of a substance. It is expressed in units of mass per unit volume, such as grams per cubic centimeter (g/cm³). In this example, we are given the mass of a material (48 grams) and its volume (6 cubic centimeters), and we can use the formula for density (density = mass / volume) to calculate its density. Plugging in the values, we get a density of 8 g/cm³, which means that 8 grams of the material occupy each cubic centimeter of space. The density of a material can provide important information about its properties, such as whether it will float or sink in a liquid, or how it will behave under different conditions.

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