Write the formula for the conjugate acid of each of the following: [4]
(i) HSO3–,
(ii) F–,
(iii) PO43–,
(iv) CO.

Answer:

0.001

Explanation:

The magnification of the magnifying glass is approximately 1.44.

To calculate the magnification of the magnifying glass, we can use the formula:

Magnification = (image distance) / (object distance)

In this case, the magnifying glass is held 10.4 cm from the mole, so the object distance (d₀) is 10.4 cm. The focal length (f) of the magnifying glass is given as 15.0 cm.

Using the formula, we can calculate the magnification (M):

M = (image distance) / (10.4 cm)

The magnification of a magnifying glass is typically assumed to be the ratio of the image distance to the least distance of distinct vision (25 cm for a relaxed eye). Therefore, we need to find the image distance (dᵢ) in terms of the least distance of distinct vision.

Using the lens formula: 1/f = 1/d₀ + 1/dᵢ

We can rearrange the formula to solve for the image distance (dᵢ):

1/dᵢ = 1/f - 1/d₀

Substituting the given values:

1/dᵢ = 1/15 cm - 1/10.4 cm

Calculating the result:

1/dᵢ ≈ 0.0667 cm⁻¹

dᵢ ≈ 15 cm

Now we can substitute the values for image distance (dᵢ) and object distance (d₀) into the magnification formula:

M = 15 cm / 10.4 cm

Simplifying the calculation:

M ≈ 1.44

Therefore, the magnification of the magnifying glass in this scenario is approximately 1.44.

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To calculate the number of moles of oxygen in copper oxide, we need to know the molar mass of oxygen and the amount of copper oxide present.

Given that the molar mass of oxygen is 16.00 g/mol, we can use this information to determine the number of moles of oxygen.

First, we need to determine the molar mass of copper oxide. Copper oxide consists of one copper atom (Cu) and one oxygen atom (O). The atomic mass of copper is 63.55 g/mol.

The molar mass of copper oxide can be calculated as follows:

Molar mass of copper oxide = (atomic mass of copper) + (atomic mass of oxygen)
                         = 63.55 g/mol + 16.00 g/mol
                         = 79.55 g/mol

Next, we need to know the amount of copper oxide present. Let's assume we have 100 grams of copper oxide.

To calculate the number of moles of oxygen, we can use the formula:

Number of moles = Mass of substance / Molar mass

Mass of oxygen = Mass of copper oxide - Mass of copper
             = 100 g - (63.55 g/mol * 1 mol)
             = 36.45 g

Number of moles of oxygen = Mass of oxygen / Molar mass of oxygen
                        = 36.45 g / 16.00 g/mol
                        ≈ 2.28 mol

The number of moles of oxygen in 100 grams of copper oxide is approximately 2.28 moles.

To calculate the number of moles of oxygen in copper oxide, we need to know the molar mass of oxygen and the mass of copper oxide. By using the formula for moles and the given information, we can determine that there are approximately 2.28 moles of oxygen in 100 grams of copper oxide.

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There are 0.125 moles of oxygen in 10 grams of copper oxide.

To calculate the number of moles of oxygen in the copper oxide, we need to know the mass of copper oxide and its chemical formula. Assuming the formula of copper oxide is CuO, we can use the molar mass of oxygen (16.00 g/mol) to calculate the number of moles.

1. Determine the mass of copper oxide.
2. Calculate the molar mass of copper oxide using the atomic masses of copper and oxygen.
3. Divide the mass of copper oxide by its molar mass to obtain the number of moles.

Let's say we have 10 grams of copper oxide.
1. The mass of copper oxide is 10 grams.
2. The molar mass of copper oxide (CuO) is the sum of the atomic masses of copper (Cu) and oxygen (O). The atomic mass of copper is 63.55 g/mol, and the atomic mass of oxygen is 16.00 g/mol. So the molar mass of copper oxide is 63.55 g/mol + 16.00 g/mol = 79.55 g/mol.
3. Divide the mass of copper oxide (10 grams) by its molar mass (79.55 g/mol) to get the number of moles of copper oxide.

So, the number of moles of copper oxide is 10 grams / 79.55 g/mol = 0.125 moles.

Therefore, there are 0.125 moles of oxygen in 10 grams of copper oxide.

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23.01% is the mass percent water in MgSO\(_4\)• 2 H\(_2\)O. The term "mass percentage" describes the proportion.

One approach to indicate the concentration of such a dissolved component in a solution is by mass percentage. The term "mass percentage" describes the proportion of a compound's mass to the overall mass of a solution.

Calculate the mass percent concentration, for instance, of a solution made by combining 6 g of sodium bicarbonate (NaHCO3) and 10 g of sodium chloride (NaCl) in 120 g of water.

mass percent = (mass of water/mass of MgSO\(_4\)• 2 H\(_2\)O)×100

mass percent =( 36/156.39)×100

                     =23.01%

Therefore, 23.01% is the mass percent water in MgSO\(_4\)• 2 H\(_2\)O.

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The net ionic equation focuses on the species that are directly involved in the reaction, highlighting the formation of solid calcium sulfate (CaSO4).

The reaction between sodium sulfate (Na2SO4) and calcium chloride (CaCl2) can be represented by the following balanced chemical equation:

Na2SO4(aq) + CaCl2(aq) → 2NaCl(aq) + CaSO4(s)

To write the complete ionic equation, we need to break down all the soluble compounds into their respective ions:

Na2SO4(aq): 2Na⁺(aq) + SO4²⁻(aq)

CaCl2(aq): Ca²⁺(aq) + 2Cl⁻(aq)

2NaCl(aq): 2Na⁺(aq) + 2Cl⁻(aq)

CaSO4(s): CaSO4(s)

By substituting the ions into the balanced chemical equation, the complete ionic equation is:

2Na⁺(aq) + SO4²⁻(aq) + Ca²⁺(aq) + 2Cl⁻(aq) → 2Na⁺(aq) + 2Cl⁻(aq) + CaSO4(s)

In the complete ionic equation, the ions that appear on both sides of the equation (Na⁺ and Cl⁻) are called spectator ions. They do not participate in the actual chemical reaction and can be eliminated from the equation. Simplifying the equation by removing the spectator ions gives the net ionic equation:

SO4²⁻(aq) + Ca²⁺(aq) → CaSO4(s)

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Answer:

Organic molecules contain carbon; inorganic compounds do not. Carbon oxides and carbonates are exceptions; they contain carbon but are considered inorganic because they do not contain hydrogen. The atoms of an organic molecule are typically organized around chains of carbon atoms.

Answer: it)s not letting me download it edit it a d re send it

Explanation:

Answer:

Tin and Copper

Explanation:

The two atoms that could potentially form alloys are the tin and copper atoms.

Alloys are mixtures formed between two or more metals.

The goal of forming alloys is to take properties of one metal and add to that of another metal so as to enhance both materials.

Alloys are only formed between metals.

The only metal pair given from the choices is that of tin and copper.

Therefore, the two atoms that could potentially form alloys is tin and copper.

Answer:

B: nuclear energy.

Explanation:

It is emission-free and it saves 2.4 billion tons of carbon emissions per year. Also, the level of hazard of nuclear waste does decrease during the time.

Hope that helps!

Answer:

You need to make sure the number of atoms of each element on the reactant side is equal to the number of atoms of each element on the product side. In order make both sides equal, you will need to multiply the number of atoms in each element until both sides are equal. :)

Answer:

Explanation:

Extensive properties are ;

Intensive properties are ;

Volume is an extensive property of a substance.

An extensive property is a property that depends on the amount of matter in a sample. Mass and volume are examples of extensive properties. An intensive property is a property of matter that depends only on the type of matter in a sample and not on the amount.

Density is an intensive property because there is a narrow range of densities across the samples. No matter what the initial mass was, densities were essentially the same. Since intensive properties do not depend on the amount of material, the data indicate that density is an intensive property of matter.

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Answer:

1.03 grams / mL

Explanation:

Mass of beaker and sample liquid = 84.64

Mass of beaker                                = 32.344

Mass of the sample (subtract)        =  52.296

Don't do any rounding until you are finished.

mass = 52.296 grams

volume = 50.6 mL

density = mass / volume

density = 52.296/50.6

density = 1.034 grams / mL

Rounding

The volume only has 3 dig digs

So the answer is 1.03 grams / mL

Answer:

Relative and average atomic mass both describe properties of an element related to its different isotopes. However, relative atomic mass is a standardized number that's assumed to be correct under most circumstances, while average atomic mass is only true for a specific sample.

Explanation:

Answer:

a.the air has less thermal energy so that the temperature increases

Answer:

(CH3COO)2 + redP + Cl2 → ClCH2COOH + HCl

Explanation:

This is an example of halogenation of carboxylic acids at alpha carbon atom. In this reaction, red phosphorus and chlorine are treated with carboxylic acids having alpha hydrogen atom followed by hydrolysis to form alpha chloro carboxylic acid.

Explanation:

The molecules of solids are shrinked in there normal state . but as a heat energy is produced , the molecules starts curating fast and fast as temperature goes up . since they vibrate , they hit and collide each other breaking the bondings this increases the surface of area of the solid , and molecules consumes that space and they expand .

Answer:

Nonmetal reactivity decreases down a group because the nucleus' ability to gain more valence electrons weakens due to more nuclear shielding. For Metals: the most reactive metals are those that can lose their valence electrons the most easily. ... Francium is the most reactive metal

Explanation:

Answer:

While moving from top to bottom in a group of the periodic table, the reactivity of non- metals decreases. ... Thus, the tendency of gaining electron/s in the valence shell decreases as well as the chemical reactivity also decreases on moving from top to bottom in a group of non- metals.

The value of x, given that the pressure of the gas is 1.24×10⁵ Pa, is 13.28 cm

First, we shall determine the height. Details below:

P₉ = Pₐ + dgh

93.023 = 76 + (0.0136 × 980 × h)

93.023 = 76 + 13.328h

Collect like terms

93.023 - 76 = 13.328h

17.023 = 13.328h

Divide both sides by 13.328

h = 17.023 / 13.328

= 1.28 cm

Finally, we shall obtain the value of x by adding 12 cm as shown in the diagram to the height obtained as above. Thus, we have:

Value of x = 12 + 1.28

= 13.28 cm

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To calculate the time it will take to plate 14.5 kg of copper onto the cathode, we need to use Faraday's law of electrolysis, which states that the amount of substance deposited or liberated during electrolysis is directly proportional to the quantity of electricity passed through the cell.

The formula we can use is:

Amount of substance deposited = (Current × Time × Molar mass) / Faraday's constant

First, we need to determine the molar mass of copper (Cu), which is 63.55 g/mol.

Next, we need to determine the Faraday's constant, which is 96,485 C/mol.

Given that the current passed through the cell is held constant at 35.0 A and we want to plate 14.5 kg of copper, we can rearrange the formula to solve for time:

Time = (Amount of substance deposited × Faraday's constant) / (Current × Molar mass)

Plugging in the values:

Time = (14,500 g / 63.55 g/mol) × (96,485 C/mol) / (35.0 A)

Time = (228.17 mol) × (96,485 C/mol) / (35.0 A)

Now, we can calculate the time in seconds. However, since the current is in amperes (A) and the Faraday's constant is in coulombs per mole (C/mol), the units cancel out, and we can convert the result to hours.

Time = (228.17 mol) × (96,485 s) / (35.0 A) / (3600 s/hour)

Time ≈ 180.84 hours

Therefore, it will take approximately 180.84 hours to plate 14.5 kg of copper onto the cathode when a current of 35.0 A is passed through the cell.

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Answer:

38.54 x 10^23 atoms of N2

Explanation:

Each mole contains Avagadro's Number ( 6.022 x10^23) of particles

   3.2   x     6.022 x 10^23 = 19.27 x 10^23 MOLECULES

   N2  is TWO atoms    soooo    2 x 19.27 x 10^23 = 38.54 x 10^23 atoms

The list of elements is arranged from smallest to largest atomic radius is F, Cl, and Br. Thus option C is correct.

Atomic radius is defined as the total distance from the nucleus of an atom to the outermost orbital of its electrons.

Periodic table can be defined as a tabular array of the chemical element which is arranged according to their increasing atomic number.

The elements  F, Cl and Br has atomic radius

F = 147 PM

Cl =  175 PM

Br = 185 PM

Thus, list of elements is arranged from smallest to largest atomic radius is F, Cl, and Br. Thus option C is correct.

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Your question is incomplete but probably your full question was

Which of the following list of elements is arranged from smallest to largest atomic radius?

A. K, Ca, Sc

B. K, Na, Li

C. F. CI Br

D. Ge P, O​

Answer:

So whats the question?

Explanation:

Answer:

Catabolic reaction.

Answer:

Poop

Explanation:

Answer:

convergergent

Explanation:

Mountains form where two continental plates collide. Since both plates have a similar thickness and weight, neither one will sink under the other. Instead, they crumple and fold until the rocks are forced up to form a mountain range. As the plates continue to collide, mountains will get taller and taller.

the change in Gibbs energy is 5.2 J/mol, and the reaction is non-spontaneous under these conditions.

To calculate the change in Gibbs energy, we can use the equation:

ΔG = ΔH - TΔS

ΔH - change in enthalpy,

ΔS - change in entropy,

T - temperature in Kelvin.

at 188 K, ΔH = 2380 J/mol and ΔS = 12.6 J/mol K

ΔG = (2380 J/mol) - (188 K)(12.6 J/mol K)

ΔG = 2380 J/mol - 2374.8 J/mol

ΔG = 5.2 J/mol

The positive value of ΔG indicates that the reactants are more stable than the products and that energy must be added to the system to drive the reaction forward.

Therefore, the change in Gibbs energy is 5.2 J/mol, and the reaction is non-spontaneous under these conditions.

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Answer:

High levels of nitrogen dioxide are also harmful to vegetation—damaging foliage, decreasing growth or reducing crop yields. Nitrogen dioxide can fade and discolour furnishings and fabrics, reduce visibility, and react with surfaces.

1-We could use low-nitrogen fuels

2- We could also modify combustion conditions to generate less NOx. Flue gas treatment techniques, such as selective cata- lytic reduction (SCR) processes, can remove NOx

Answer:

The vascular system, also called the circulatory system, is made up of the vessels that carry blood and lymph through the body. The arteries and veins carry blood throughout the body, delivering oxygen and nutrients to the body tissues and taking away tissue waste matter.

Explanation:

Answer:

1.8 g/ml

Explanation:

density = mass/volume

d = 54/30

Ionic bonds are created when two oppositely charged ions are attracted to one another by electrostatic force. A chemical element is uniquely defined by its atoms, which are tiny pieces of substance.

An atom is made up of a core nucleus and one or more negatively charged electrons that orbit it. The positively charged, comparatively hefty protons and neutrons that make up the nucleus may be present. Any elementary particle of matter with at least one proton is referred to as an atom. Examples of atoms are neon (N) and hydrogen (H) (Ne). Chemistry's fundamental building component is an atom. It is the lowest fraction of substance into which electrically charged particles cannot be released. It is also the smallest piece of substance with chemical element-like characteristics.

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