which one of the following reagents is capable of oxidizing cu(s) to cu2 (1 m)?

Answer:

Answer:

1. B

2.C

3.D

4.Sorry don't this one :(

5.A

Explanation:

please give me at least 20 points ❤

The balanced equation is \(\text{CH}_{4}+2\text{O}_{2} \longrightarrow \text{CO}_{2}+2\text{H}_{2}\text{O}\).

The correct balanced chemical equation is CH₄ +  2 O₂\(\rightarrow\) CO₂ + 2 H₂O.

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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To prepare a 500.0 g 4.00% KOH solution, you will need 20.0 g of KOH and 480.0 g of water.

A 4.00% KOH solution means that 4.00 g of KOH is present in 100.00 g of solution. To calculate the amount of KOH needed for a 500.0 g solution, we can set up a proportion:

(4.00 g KOH / 100.00 g solution) = (x g KOH / 500.0 g solution)

Cross-multiplying and solving for x, we find:

x g KOH = (4.00 g KOH / 100.00 g solution) * 500.0 g solution = 20.0 g KOH

So, you will need 20.0 g of KOH to prepare the solution.

To determine the amount of water needed, we can subtract the mass of KOH from the total mass of the solution:

Mass of water = Total mass of solution - Mass of KOH = 500.0 g - 20.0 g = 480.0 g

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Considering the definiton of atomic number and atomic mass, the number of neutrons of the potassium is 21.

All atoms are composed of a central nucleus in which there are particles with a positive electric charge, the protons, and a neutral charge, the neutrons, around which other particles with a negative electric charge, which are electrons, move.

Atoms of different elements have different amounts of protons. The atomic number (which is identified by the letter Z) indicates the amount of protons that is present in the nucleus of an atom. This number is then responsible for defining the electronic configuration of the atom and the chemical properties of the element.

On the other side, the atomic mass (A) is defined as the sum of number of protons and number of neutrons:

Atomic mass = Number of protons  + Number of neutrons

In this case, the potassium (K) elements has atomic number 19. That means, the number of of protons is equal to 19. And the atomic mass is 40. So, the number of neutrons is calculated as:

40= 19  + Number of neutrons

Solving:

Number of neutrons= 40 - 19

Number of neutrons= 21

Hence, the number of neutrons of the potassium is 21.

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Answer:

7.2 meters per hour

Explanation:

It is given that,

The speed of a paramecium is 2,000 micrometers per second.

We need to find the speed of the paramecium in meters per hour.

We know that,

\(1\ \mu m=10^{-6}\ m\)

and

1 hour = 3600 seconds

\(v=2000\ \dfrac{\mu m}{s}\\\\=2000\times \dfrac{10^{-6}\ m}{(\dfrac{1}{3600})\ s}\\\\=7.2\ \text{meters/hour}\)

Hence, the speed of the paramecium is 7.2 meters per hour.

Answer:

Assuming you need the names :)

Explanation:

It's dithecous anther

Answer:

\(1oz=29.589ml\)

Explanation:

From the question we are told that:

Initial Volume \(v_1=250ml\)

Final Volume \(v_2=8.45oz\)

Generally the equation for one ounce is mathematically given by

 \(1oz=\frac{v_1}{v_2}\)

Therefore

 \(1oz=\frac{250}{8.45}\)

 \(1oz=29.589ml\)

LiCl is 89.8 g dissolved.

NaNO3 has the highest solubility.

The amount of a substance that can dissolve in a specific solvent at a specific temperature and pressure is referred to as its solubility. Experimentally, the solubility of a material can be determined by combining it with a fixed amount of solvent in a known amount and then measuring the concentration of the solute in the resulting solution.

In order to measure a substance's solubility, units such as grams of solute per liter of solvent (g/L) or moles of solute per liter of solvent (mol/L) are typically used.

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The results of the experiments can be said to be in line with the law of multiple proportions.

The law of multiple proportions states that when two elements combine to form two or more compounds, the ratio of the masses of one element that mix with a fixed mass of the other element can be expressed in whole numbers.

In the two experiments, it is obvious that the ratio of the copper to the oxygen in the compounds are almost the same and this is in line with the statement of the law of multiple proportions.

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The calcium ion has 18 protons, 20 neutrons, and 20 electrons.
The relationship between the components a and b is Inverse proportion.


The calcium ion (Ca2+) has a 2+ charge, indicating that it has lost 2 electrons from its neutral state. To determine the number of protons, neutrons, and electrons in the calcium ion, we need to consider its atomic number and mass.

The atomic number of calcium is 20, which indicates that it has 20 protons. Since the calcium ion has a 2+ charge, it means it has lost 2 electrons. Therefore, the number of electrons in the calcium ion is 20 - 2 = 18.

The mass number of calcium is 40 amu, which represents the total number of protons and neutrons. Since the calcium ion has 20 protons, the number of neutrons can be calculated as 40 - 20 = 20.

So, the correct option is: d. 18 protons, 20 neutrons, and 20 electrons

In the expression a∼1/b, the relationship between the components a and b is an inverse proportion. This means that as the value of a increases, the value of b decreases, and vice versa. The symbol ∼ represents the proportional relationship between a and 1/b, indicating that they are inversely related. Therefore, the correct answer is: Inverse proportion

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Answer:

2 Na

Explanation:

2 Na atoms per 1 Sulfide atom

hope this helps

Answer: Mass of LiOH = (1.54 × 10⁻³ mol) × (23.9 g/mol) = 0.0368 g ==== OR: [ (1 × 10⁻¹⁴)/10⁻¹¹·⁷¹ mol OH⁻ ions / 1000 mL solution] × (300 mL solution) × (1 mol LiOH / 1 mol OH⁻ ions) × (23.9 g LiOH / 1 mol LiOH)

Explanation:

The mass of 50,000 molecules of methane is 1.35 × 10⁻¹⁸ gram.

To find the mass of 50,000 molecules of methane, we need to multiply the mass of one methane molecule by the number of molecules.

Given:

Mass of one methane molecule = 2.7 × 10⁻²³ gram

Number of methane molecules = 50,000

To calculate the mass of 50,000 molecules of methane, we can use the following equation:

Mass = (Mass of one molecule) × (Number of molecules)

Mass = (2.7 × 10⁻²³ gram) × (50,000)

Now, let's calculate the mass:

Mass = 2.7 × 10⁻²³ × 50,000

Mass = 1.35 × 10⁻¹⁸ gram

Therefore, the mass of 50,000 molecules of methane is 1.35 × 10⁻¹⁸ gram.

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Explanation:

The claim that hydrogen chloride (HCl) would be much stronger than nitric acid (HNO3) due to opposing dipole forces is incorrect.

Both HCl and HNO3 are strong acids, meaning that they dissociate completely in water to produce H+ ions. The strength of an acid is determined by the degree to which it dissociates in water. In other words, the stronger the acid, the more H+ ions it produces in water.

The dissociation of HCl and HNO3 in water can be represented as follows:

HCl + H2O → H+ + Cl-

HNO3 + H2O → H+ + NO3-

As we can see, both HCl and HNO3 produce H+ ions in water. Therefore, the strength of an acid cannot be solely determined by its dipole forces.

In addition, it's important to note that HCl is a much more volatile and corrosive acid than HNO3. It can cause severe respiratory and skin irritation when it is inhaled or comes into contact with skin. Therefore, switching HNO3 for HCl could be dangerous and should not be done without proper precautions and expert knowledge

The pressure of the hydrogen gas formed is given by its partial pressure at

the given temperature.

The pressure of the hydrogen gas formed is approximately 717.38 mmHg.

Reasons:

The pressure of the hydrogen gas formed is given by the difference

between the vapor pressure of the gas collected and the vapor pressure of

water.

The vapor pressure of water at 24.0 °C is given by the Clausius-Clapeyron

Equation as follows;

\(ln \left(\dfrac{P_2}{P_1} \right) = \dfrac{\Delta H_{vap}}{R} \cdot \left(\dfrac{1}{T_1} - \dfrac{1}{T_2} \right)\)

Where;

P₁ = The partial pressure at temperature, T₁

P₂ = The pressure at temperature, T₂

We get;

\(ln \left(\dfrac{P_2}{23.8 \ mmHg} \right) = \dfrac{44,000 \ J/mol}{8.3145 \ J/(mol \cdot K)} \cdot \left(\dfrac{1}{298 \ K} - \dfrac{1}{297.15 \ K} \right)\)

The pressure of water at 24.0 °C, P₂ ≈ 22.62 mmHg

The vapor pressure of water at 24.0°C is 22.62 mmHg

Therefore;

The pressure of the hydrogen gas formed ≈ 740.0 mmHg - 22.62 mmHg = 717.38 mmHg

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Answer:

sp3

Explanation:

4 bonds to central atom with no lone pair

Fluorescein is a fluorescent dye that appears orange in acetone and nearly colorless in ether due to differences in their polarity and solvation. Acetone is a polar solvent with a high dielectric constant, whereas ether is a less polar solvent with a lower dielectric constant.

In a polar solvent like acetone, fluorescein molecules form strong intermolecular interactions, stabilizing the excited state of the dye and increasing the absorption and fluorescence intensity.

This results in the orange color observed. Conversely, in a less polar solvent like ether, there are weaker intermolecular interactions between the fluorescein molecules, leading to a lower energy excited state and a reduced absorption and fluorescence intensity.

Consequently, fluorescein appears nearly colorless in ether.

In summary, the difference in color of fluorescein in acetone and ether is due to the varying solvent polarity and resulting solvation effects on the dye's excited state, influencing absorption and fluorescence intensity.

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In a non - polar molecule, there may be instantaneous dipole created by specific positions of electrons. This instantaneous dipole can induce a dipole in a near by non - polar molecule.

When the charge distribution is averaged over time, a molecule is said to be nonpolar if it has a spherically symmetric charge distribution; yet, because charges fluctuate, there is always a momentary dipole moment in such a molecule.

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There are 8.78 x 1024 atoms of phosphorus in 7.30 mol of copper (II) phosphate.

The given compound is copper (II) phosphate, which has the molecular formula Cu₃(PO₄)₂.

To determine the number of phosphorus atoms present in 7.30 mol of the compound, we need to use Avogadro's number (6.022 x 1023) and the stoichiometric coefficients of the atoms in the compound.

Let's first find the molar mass of copper (II) phosphate.

Cu₃(PO4)2 = 3Cu + 2PO₄

Cu = 63.55 g/mol

PO₄ = 94.97 g/mol

Total molar mass

= 3(63.55) + 2(94.97)

= 380.7 g/mol

Now we can find the number of moles of copper (II) phosphate in 7.30 mol.

Moles of Cu₃(PO₄)₂ = mass/molar mass

= 7.30 mol x 380.7 g/mol

= 2778.81 g

Next, we can find the number of formula units of Cu₃(PO₄)₂ that corresponds to 7.30 mol.

N = (moles of Cu₃(PO₄)₂) x Avogadro's number

= 7.30 mol x 6.022 x 1023

= 4.39 x 1024 formula units

Finally, we can find the number of phosphorus atoms in 4.39 x 1024 formula units of Cu₃(PO₄)₂.

Number of phosphorus atoms

= 4.39 x 1024 x 2 x 1

= 8.78 x 1024 atoms (since each formula unit contains 2 phosphorus atoms)

Therefore, there are 8.78 x 1024 atoms of phosphorus in 7.30 mol of copper (II) phosphate.

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Answer:

Prokaryotic cells don't have a nucleus, so its false.

Answer:

hi

Explanation:

Answer:

1s²2s²p⁶3s²p⁴

Explanation:

An atom that is in the ground state has not lost or gained electrons. If we look at the Periodic Table, we can see that the electron configuration of the sulfur atom (S) is [Ne]3s²p⁴. Since the electron configuration of Ne is 1s²2s²p⁶, the complete electron configuration is 1s²2s²p⁶3s²p⁴.

The correct answer is N D R, lists the isoelectric pH's of asp, asn, and arg from lowest to highest

Isoelectric pH is the pH value at which a molecule does not have a net electric charge. At this pH, the amino acid's zwitterionic form has an equal number of positively and negatively charged ions. Amino acids with acidic side chains, such as aspartate (asp), have lower isoelectric pHs, whereas amino acids with basic side chains, such as arginine (arg), have higher isoelectric pHs.Asn is an abbreviation for Asparagine, and R is an abbreviation for Arginine. Aspartate and asparagine are two amino acids with a side chain of carboxylic acid. The side chain of arginine has a positive charge. As a result, Asp and Asn have low isoelectric pHs, whereas Arg has a high isoelectric pH. As a result, the isoelectric pH's of Asn, Asp, and Arg are N, D, and R, respectively. Therefore, the correct answer is N D R.

The isoelectric pH's of Asn, Asp, and Arg are N, D, and R, respectively. Therefore, the correct answer is N D R.

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Answer: The CaCl2 solution will conduct electricity.

Answer:

i think that the  CaCl2 solution will conduct electricity

Explanation:

im not sure but if im wrong im sorry

In the given illustration, Carbon is black, and Oxygen is red. The given reaction can be balanced by following the law of conservation of mass.The reaction can be given as:

CO + O2 → CO2

Here, CO and O2 are the reactants, and CO2 is the product.To balance the given equation, the coefficients can be placed before each substance present in the reaction.Here are the balanced coefficients required to balance the reaction illustrated: 2 CO + O2 → 2 CO2. Here, the coefficient 2 is required to balance both the reactants and products.

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Answer:

Helium

Explanation:

The first ionization energy varies in a predictable way across the periodic table.

Hello friend! Hopefully this helps you as much as needed!

An English scientist called John Newlands put forward his Law of Octaves in 1864. He arranged all the elements known at the time into a table in order of relative atomic mass. He then put the similar elements into vertical columns, known as groups.

One gram of sodium chloride takes longer to dissolve in a solution of 2M glucose than in pure water. This is because sodium chloride will encounter a greater frequency of collisions in a 2M glucose solution than in water. This shows that diffusion occurs more slowly in a solution containing a solute than in pure water.

If you were to put one gram of sodium chloride in a beaker of pure water, it would eventually dissolve. However, if you were to put the same amount of sodium chloride in a beaker of water that also contained two moles of glucose, it would take longer for the sodium chloride to completely dissolve.

The reason for this is that, in a solution with more molecules present, the sodium chloride would encounter more collisions. This would lead to a slower diffusion rate, and thus, a longer time for the sodium chloride to completely dissolve.

In general, solutions with more molecules present will have a slower diffusion rate than solutions with fewer molecules present. So, if you want the sodium chloride to dissolve quickly, it's best to put it in a pure water solution.

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Answer:

2 M

Explanation:

NaOH + HCl --> NaCl + H2O,

5.54 mL = .00545 L,

If we consider 2.18 M, M [molarity] = mol/L, so we have 2.18 mol/L. From this we can get the moles of NaOH.

.00545 L *  2.18 mol/L ≈ .0121 mol

The concentration of HCl can be found from the following:

.0121 mol = .00619(x) [where x = concentration of HCl]

x = 1.955 M ≈ 2 M

We equate the two as we require the same amount in order to neutralize the base.

A substantial imbalance between demand and response capability under conditions in which failure has important consequences refers to STRESS. It may affect the functioning of a biological system.

Homeostasis refers to the state of internal (steady) equilibrium, which is required for the normal functioning of a biological system.

Conversely, stress can be defined as any environmental factor (e.g., excessive temperature condition) which is directly affecting the normal functioning of an organism.

Stress may lead to the loss of the homeostatic state when conditions cannot be supported by the organism.

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