How many electrons would Pd have if it had a +2 charge?_ How many electrons would Pd have if it had a +2 charge?

Answer:

wow ok ill try to

Explanation:

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Assuming no other unlisted ions are present in the water, the estimated concentration of  \(Na^+\) (in mg/L as  \(Na^+\)) is 21.2 mg/L.

Using an anion-cation balance, we may estimate the concentration of Na+ (in mg/L as Na+) by ensuring that the total positive charge from cations matches the total negative charge from anions.

The total positive charge from cations = (\(Ca^{+2} + M^g{+2} + Na^+ + K^+\))

The total negative charge from anions = (\(HCO^{3-} + SO_4^{2-} + Cl^-\))

Total positive charge = (40.0 + 10.0 + Na+ + 7.0)

Total negative charge = (67.2 + 11.0)

Total positive charge = Total negative charge

(40.0 + 10.0 + \(Na^+\) + 7.0) = (67.2 + 11.0)

Simplifying the equation:

57.0 + Na+ = 78.2

Subtracting 57.0 from both sides:

Na+ = 78.2 - 57.0

Na+ = 21.2 mg/L

Therefore, the estimated concentration of  \(Na^+\) (in mg/L as  \(Na^+\)) is 21.2 mg/L.

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Your question seems incomplete, the probable complete question is:

2. A sample of water has the following concentrations of ions (and pH = 7.0):

cations mg/L

anions mg/L

Ca+2

40.0

Mg+2

10.0

Na+

?

K+

7.0

HCO3 110.0

SO42-

67.2

Cl-

11.0

Assuming no other constituents are missing, use an anion-cation balance to estimate the concentration of Na* (in mg/L as Na*)? Remember that the balance cannot be in mg/L.

Dalton's theory, also known as the atomic theory of matter, provides a fundamental understanding of chemical change. According to this theory, atoms are indivisible and indestructible particles that combine in fixed ratios to form compounds. In the process of chemical change, known as a chemical reaction, atoms are rearranged, but they are neither created nor destroyed.

In more detail, Dalton's theory explains that when a chemical reaction occurs, the bonds between atoms are broken and new bonds are formed, resulting in the creation of different substances. These reactions occur due to the rearrangement of atoms and the redistribution of their electrons.

For example, in the reaction between hydrogen and oxygen to form water, Dalton's theory explains that the hydrogen and oxygen atoms combine in a fixed ratio of two hydrogen atoms for every one oxygen atom. The reaction involves breaking the bonds between hydrogen and oxygen molecules and forming new bonds between hydrogen and oxygen atoms to create water molecules.

Overall, Dalton's theory provides a framework for understanding how chemical changes occur through the rearrangement of atoms and the formation of new substances with different properties.

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The percent concentration of the solution containing 90 grams of NaOH in 750 mL of buffer is 300%.

Mass of NaOH = 90 grams

Molecular weight of NaOH = 40 g/mol

The volume of buffer solution = 750 mL

Converting the volume to litres -

= 750 mL

= 750/1000

= 0.75 L

Calculating the number of moles of NaOH -

= Mass / Molecular weight

= 90  / 40

= 2.25 mol

Calculating the percent concentration -

= (Amount of solute / Total solution volume) x 100

= (2.25 / 0.75 ) x 100

= 3 x 100

= 300

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The correct abbreviation for each metric unit is:

Kilogram - kg, Milliliter - ml, Kilometer- Km, Meter- m, Millimeter - mm, Centimeter - cm, Gram - g,  Liter - L, and Milligram - mg.

The metric system can be described as a system of measurement that succeeded the decimalized system based on the meter.  Each of the fundamental dimensions can be expressed by a single base unit of measure.

For quantities derived from the base units of the system, units derived from the base units are used such as the square meter being the derived unit for the area, a quantity derived from length.

Metric units can be described as units based on the meter, gram, or second and decimal multiples or sub-multiples of these. The units of the International System of Units (SI). By extension, they involve units of electromagnetism from the CGS units and SI units systems.

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The unknown metal has a specific heat of 0.128 J/(g°C).

To find the specific heat of an unknown metal you can use the formula:

Q = m*c*ΔT

where Q is the amount of thermal energy supplied, m is the mass of the metal, c is the specific heat of the metal, and ΔT is the temperature change. We know that the mass of the metal is 50 g and the temperature change is ΔT = (955 °C - 25 °C) = 930 °C.

Substituting these values ​​into the formula gives:

6000J = 50g*c*930°C

Solving for c gives:

c = 6000J / (50g * 930°C) = 0.128J/(g°C)

This value is relatively low compared to other metals such as copper, which has a specific heat of 0.385 J/(g°C). This suggests that the unknown metal has low thermal conductivity and may require less energy for heating compared to copper. Determining the specific heat of metals is important in a variety of industrial and scientific applications, such as developing thermal management systems and determining the heat transfer capabilities of materials.

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The correct answer is B. Metalloids

Explanation:

In this periodic table, the green boxes include elements such as Boron (B), Arsenic (As), and Antimony (Sb). All these elements are known in chemistry as semimetals or metalloids. This classification is because these elements cannot be completely classified into metals or non-metals. Moreover, they all display similar properties including some level of conductivity, malleability, and solid-state. According to this, the correct answer is B.

Answer:

B. Metalloids

Explanation:

the answer is magnetism :)

There are various methods to separate individual components from a mixture. The best method to separate paper clips from a mixture of salt and pennies is option c , magnetism.

Magnetism is the force of magnetic filed to the magnetically susceptible substances. Metals like experience magnetism and by which magnetically attracting particles can be separated.

Various separation methods includes filtering, distillation, chromatography, evaporation etc. Filtration is the process of separating solid components from solution using filter papers.

Evaporation is the method by which the solvent is evaporated out to get the solute by heating or boiling. Chromatography is a widely used technique to separate organic and inorganic compounds, proteins, natural products etc.

Using a magnetic field or a magnet the pennies and paper clips can be taken out from the mixture from the magnet itself these clips and pennies can be easily separated.

The remaining salt can then be separated from the pennies and clips and collected. Therefore the best method of separation of pennies, paper clips and salt is magnetism.

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In yeast, the reaction is eleventh order:Rate = K[ enzyme ] [isocitrate]⁴[AMP]²[NAD⁺]m [Mg²⁺]². The order with respect to NAD⁺ is 2.

The citric acid cycle is also called the Krebs cycle. This is the main source of energy that happens in aerobic conditions.

The coefficient that is raised to the active concentration of the reactants is the order in the mass action law. It is determined experimentally and can be fractional, positive, negative, or zero.

Each reactant's order, which is increased to its power in the rate law, is added to determine the order of the entire reaction.

The overall rate = 11

Rate of overall reaction = 1 + 4 + 2 + m + 2 = 11

9 + m = 11

m = 2

Thus, the order with respect to NAD⁺ is 2.

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Element. An element is a pure material with only one type of atom that is incapable of being physically or chemically divided into two or more simpler compounds.

As a result, when gold is broken down, gold is still the result. It is a constituent. It is a thick, soft, malleable, ductile, brilliant, somewhat orange-yellow metal in its purest form. Gold belongs to the group 11 family of elements and is a transition metal. It is one of the least reactive chemical elements and, under normal circumstances, is solid. A specific element cannot be broken down into simpler compounds at the atomic level by normal physical or chemical processes. Oxygen, carbon, helium, mercury, copper, and gold are a few examples of elements that you could be familiar with.

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Answer:

ture

Explanation:

The potential energy of any system veritably depends upon the distance depending upon the types of forces acting on the objects. The potential energy undeniably depends upon the distance and is inversely proportional to each other. If the force between the two is attractive then the potential energy will increase with increasing distance between them both, and if the force is repulsive then the potential energy will increase will decreasing the distance between them.

Answer:

reduce the temperature of the gas

Explanation:

when you reduce the temperature of the gas the pressure will decrease

I am very very sorry for sharing 4t so please can u send me the same question again

The percentage of copper in the 1975 penny is approximately 94.94%.

According to the given solubility and insolubility rules, we can determine the solubility of the compounds in water as follows:

NH₄Cl: Soluble (sol)

Fe(C₂H₃O₂)₃: Insoluble (insol)

Mg(NO₃)₂: Soluble (sol)

AgI: Insoluble (insol)

BaSO₄: Insoluble (insol)

CaCO₃: Soluble (sol)

CuCrO₄: Insoluble (insol)

AlPO₄: Insoluble (insol)

ZnS: Insoluble (insol)

Sr(OH)₂: Soluble (sol)

Now, let's write the balanced chemical equations for the given reactions:

potassium(s) + chlorine(g) → potassium chloride(s)

\(2K (s) + Cl₂ (g) → 2KCl (s)\)

cadmium carbonate(s) → cadmium oxide(s) + carbon dioxide(g)

\(CdCO₃ (s) → CdO (s) + CO₂ (g)\)

strontium metal(s) + water(l) → strontium hydroxide(aq) + hydrogen(g)

\(Sr (s) + 2H₂O (l) → Sr(OH)₂ (aq) + H₂ (g)\)

lead(II) nitrate(aq) + lithium iodide(aq) → lead(II) iodide(s) + lithium nitrate(aq)

\(Pb(NO₃)₂ (aq) + 2LiI (aq) → PbI₂ (s) + 2LiNO₃ (aq)\)

nitric acid(aq) + barium hydroxide(aq) → barium nitrate(aq) + water(l)

\(HNO₃ (aq) + Ba(OH)₂ (aq) → Ba(NO₃)₂ (aq) + 2H₂O (l)\)

(Optional) To determine the percentage of copper in the 1975 penny, we need to calculate the amount of copper in the penny and divide it by the initial mass of the penny.

Initial mass of the penny = 3.078 g

Mass of copper deposited = 2.920 g

Therefore, the mass of copper in the penny = 2.920 g.

Percentage of copper in the penny = (Mass of copper / Initial mass of penny) * 100

                              = \((2.920 g / 3.078 g) * 100\)

                              = 94.94%

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The mass of Al2O3 formed in the reaction is 255 g. When rounding the answer to two significant figures, the final answer remains as 255 g since it already has two significant figures. Thus, the mass of Al2O3 formed is 255 g.

To find the mass of Al2O3 formed, we need to multiply the number of moles of Al2O3 by its molar mass.

Given that the reaction produces 2.5 mol of Al2O3, we can use the molar mass of Al2O3, which is 102 g/mol, to calculate the mass of Al2O3 formed.

Mass of Al2O3 = Number of moles of Al2O3 × Molar mass of Al2O3

Mass of Al2O3 = 2.5 mol × 102 g/mol

Mass of Al2O3 = 255 g

Therefore, the mass of Al2O3 formed in the reaction is 255 g.

When rounding the answer to two significant figures, the final answer remains as 255 g since it already has two significant figures.

Thus, the mass of Al2O3 formed is 255 g.

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Answer:

THE HEAT EVOLVED FROM THE COMBUSTION OF 1 MOLE OF GLUCOSE IS - 2819.7 KJ/MOL OR -2.82 * 10^3 KJ/MOL OF HEAT.

Explanation:

Write out the variables given:

Mass of glucose = 3 g

Heat capacity of bomb calorimeter = 2.21 kJ /°C

Mass of water = 1.2 kg

Specific Heat capacity of water = 4.184 kJ/kg °C

Change in temperature = ( 25.50 °C - 19.0 °C ) = 6.5 °C

To calculate the heat evolved from the combustion of 1 mole of glucose, we do the following:

Equation for the reaction:

C6H1206 (s) + 6 02 (g)--------> 6 CO2 (g) + 6 H20 (l)

Calculate the total heat capacity involved in the system:

Heat capacity (Ctotal) = Heat capacity of the bomb calorimeter + heat capacity of water

Ctotal = 2.21 kJ/°C  + (1.2 * 4.184 kJ/kg°C)

Ctotal = 7.2308 kJ°C

Next is to calculate the heat absoorbed by the calorimeter and water

Heat = Heat capacity (Ctotal) * change in temperature

Heat = 7.23 kJ/°C * 6.5 °C

Heat = 46.995 kJ

Hence, the amount of heat evolved when 3g of glucose was involved is 46.995 kJ

Since 1 mole of glucose reacts with 6 moles of oxygen to produce 6 moles of carbon dioxide and water respectively, then the amount of heat needed for the combustion of 1 mole of glucose is:

1 mole of glucose = (12 *6 + 1 * 12+ 16 *6) = 180 g/mol

From 3 g of glucose producing 46.995 kJ of heat

180 g of glucose will produce (180 * 46.995 / 3) kJ of heat

= 2819.7 kJ/mol of heat.

In conclusion, from the combustion of 1 mole of glucose, -2819.7 kJ/ mol of heat is evolved, since the heat was evolved or liberated.

Answer:

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When an iron nail is repeatedly rubbed against a permanent magnet in the same direction, it can become temporarily magnetized. This phenomenon is known as magnetic induction.

Iron is a ferromagnetic material, which means it has the ability to be easily magnetized. When the nail is rubbed against the magnet, the magnetic domains within the iron align in a particular direction due to the influence of the magnetic field produced by the magnet. The repeated rubbing in the same direction helps align the magnetic domains more consistently.

The magnetic domains are small regions within the iron where groups of atoms have their magnetic moments aligned. In an unmagnetized iron nail, these domains are randomly oriented, resulting in a net magnetic field of zero. However, when the iron nail is rubbed with a magnet, the magnetic domains align in a common direction, creating a temporary magnetic field within the nail.

The alignment of the magnetic domains persists even after the rubbing stops, causing the iron nail to exhibit magnetism. However, this magnetism is relatively weak and temporary, as the domains can easily revert to their original random orientation. It means that the iron nail loses its magnetic properties over time unless it is exposed to a stronger external magnetic field or is made into a permanent magnet through a different process.

In summary, rubbing an iron nail against a permanent magnet in the same direction aligns the magnetic domains within the iron, resulting in temporary magnetization.

:D

The following statements are true for the compound (R)-2-butanol:The IUPAC name of (R)-2-butanol is (R)-butan-2-ol.

It has a specific rotation value of +13.5°.It is an optically active compound because it can rotate the plane-polarized light to the right or clockwise, and thus, the prefix ‘R’ indicates its right-handedness.2-Butanol, also known as sec-butanol, is a colorless, water-soluble alcohol with a mild odor. (R)-2-butanol, also known as (R)-butan-2-ol, is a chiral organic compound that belongs to the family of secondary alcohols.

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Answer:

The answer is true

Explanation:

An Arrhenius acid is a substance that increases the concentration of hydrogen ions in solution when it is dissolved in water.

Answer:

false

Explanation:

The balanced net ionic equation is:

Ag⁺(aq) + ClO₄⁻(aq) + Al³⁺(aq) + 3Cl⁻(aq) → AgCl(s) + AlCl₃(aq)

The balanced net ionic equation for the reaction between silver perchlorate and aluminum chloride in aqueous solution is shown above. In this reaction, the silver ion (Ag⁺) and perchlorate ion (ClO₄⁻) from silver perchlorate (AgClO₄) react with the aluminum ion (Al³⁺) and chloride ion (Cl⁻) from aluminum chloride (AlCl₃) to form solid silver chloride (AgCl) and aluminum chloride in aqueous solution (AlCl₃).

The net ionic equation shows only the species that participate in the reaction and are involved in the formation of the product (AgCl), while the spectator ions (Cl⁻ and Al³⁺) are omitted.

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Answer:

Sulfur would gain electrons

Explanation:

Atoms want to have a complete out valence shell and because sulfur only needs 2 more electrons to complete the outer shell it would take 2 more.

Answer:

It doesn't have measure marks on it.

Answer:

the apparatus are listed below

Explanation:

The apparatus used to carry out paper chromatography are:

• Chromatography paper

• Solvent (or water)

• Pencil

• Ink (pen)

• Beaker

The apparatus used to carry out the paper chromatography are chromatography paper ,organic solvents and glass capillary.

Paper chromatography is an analytical method used to separate colored chemicals or substances.

Paper chromatography is a quick and easy process to conduct. Most of the time, it is used to test the purity of compounds and to identify substances.  

It is primarily used as a teaching tool, having been replaced by other chromatography methods, such as thin-layer chromatography.

Listed are the apparatus used to carry out the paper chromatography-

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(C) The reaction order is zero. The activation energy is the same for both the forward and reverse reactions.

For a reaction where the activation energy is the same for both the forward and reverse reactions, it implies that the rate constants for the forward and reverse reactions are equal. The rate constant (k) is related to the reaction order (n) by the equation: k = A * [reactants]^n, where A is the pre-exponential factor and [reactants] represents the concentrations of the reactants.

If the rate constants are equal, then the reaction order (n) must be zero. This is because any value of n other than zero would result in different rate constants for the forward and reverse reactions, given that the concentrations of the reactants would be different.

Therefore, the statement (C) The reaction order is zero must be true for a reaction where the activation energy is the same for both the forward and reverse reactions.

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Ethanol (C2H5OH) is the chemical term for the form of alcohol found in alcoholic beverages.

It is a colorless, volatile, flammable liquid with a strong odor. Ethanol is the product of fermentation and is used to produce alcoholic beverages. It is also used as an antiseptic, a fuel, and an additive in many commercial products. Ethanol is absorbed by the human body and can have a variety of effects on the body, including intoxication, slowed reaction time, and impaired judgment. In large doses, ethanol can cause alcohol poisoning and other serious health problems.

Ethanol is the main active ingredient in alcoholic beverages, and the amount present can range from less than 5% to more than 20%. The amount of ethanol in an alcoholic beverage can affect its taste, potency, and potential for intoxication. The higher the ethanol content, the higher the potential for intoxication.

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Answer:

3CO + Fe₂O₃ = 2Fe + 3CO₂

Explanation:

The earth’s crust is broken into separate pieces called tectonic plates (Fig. 7.14). Recall that the crust is the solid, rocky, outer shell of the planet. It is composed of two distinctly different types of material: the less-dense continental crust and the more-dense oceanic crust. Both types of crust rest atop solid, upper mantle material. The upper mantle, in turn, floats on a denser layer of lower mantle that is much like thick molten tar.

Each tectonic plate is free-floating and can move independently. Earthquakes and volcanoes are the direct result of the movement of tectonic plates at fault lines. The term fault is used to describe the boundary between tectonic plates. Most of the earthquakes and volcanoes around the Pacific ocean basin—a pattern known as the “ring of fire”—are due to the movement of tectonic plates in this region. Other observable results of short-term plate movement include the gradual widening of the Great Rift lakes in eastern Africa and the rising of the Himalayan Mountain range. The motion of plates can be described in four general patterns:

<p><strong>Fig 7.15.</strong> Diagram of the motion of plates</p>

Collision: when two continental plates are shoved together

Subduction: when one plate plunges beneath another (Fig. 7.15)

Spreading: when two plates are pushed apart (Fig. 7.15)

Transform faulting: when two plates slide past each other (Fig. 7.15)

The rise of the Himalayan Mountain range is due to an ongoing collision of the Indian plate with the Eurasian plate. Earthquakes in California are due to transform fault motion.

Geologists have hypothesized that the movement of tectonic plates is related to convection currents in the earth’s mantle. Convection currents describe the rising, spread, and sinking of gas, liquid, or molten material caused by the application of heat. An example of convection current is shown in Fig. 7.16. Inside a beaker, hot water rises at the point where heat is applied. The hot water moves to the surface, then spreads out and cools. Cooler water sinks to the bottom.

<p><strong>Fig. 7.16.</strong> In this diagram of convection currents in a beaker of liquid, the red arrows represent liquid that is heated by the flame and rises to the surface. At the surface, the liquid cools, and sinks back down (blue arrows).</p><br />

Earth’s solid crust acts as a heat insulator for the hot interior of the planet. Magma is the molten rock below the crust, in the mantle. Tremendous heat and pressure within the earth cause the hot magma to flow in convection currents. These currents cause the movement of the tectonic plates that make up the earth’s crust.

Subduction zones are simply the plate tectonic boundaries where there's a convergence of two plates.

A subduction zone simply means the biggest crash scene on Earth. At the subduction zone, it should be noted that the oceanic crust sinks into the mantle that's below lighter continental crust.

Below the surface of the Earth, subduction brings about the partial melting of the ocean crust and the mantle when they slide past each other. The melting then generates magma that produces volcanoes.

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The Chemical Formula for Glucose is C₆H₁₂O₆.

Glucose(C₆H₁₂O₆). is an organic molecule that is generally a monosaccharide. Glucose is simply called sugar and is highly abundant in nature. It should be noted that monosaccharides are a subcategory of Carbohydrates.

Glucose is generally prepared by plants through the process of photosynthesis by taking up water and Carbon-di-oxide. The stored form of glucose is termed differently depending upon the organism it is stored. In the case of plants, the stored form of glucose is starch or amylopectin whereas in animals it is called glycogen.

It also makes up the wall of plants which is referred to as cellulose, a polysaccharide of glucose.

It is an important source of energy for almost all organisms that are present on the earth.

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Answer:

C6H12O6 is the chemical formula of glucose

Answer:

Explanation:

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these are the examples of homogeneous mixture