The OH concentration in an aqueous solution at 25 °C is 3.3 x 10³.
What is [H*]?

The given question is incomplete. The complete question is:

A chemist prepares a solution of mercury(I) chloride \(Hg_2Cl_2\) by weighing out 0.537 mg of mercury(I) chloride into a 400. mL volumetric flask and filling the flask to the mark with water. Calculate the concentration in g/dL of the chemist's mercury(I) chloride solution. Round your answer to 3 significant digits

Answer: The concentration in g/dL of the chemist's mercury(I) chloride solution is \(1.34\times 10^{-4}\)

Explanation:

Concentration of a solution is defined as how many grams of solute in=s dissolved in a particular amount of solvent.

Given :  mass of mercury (I) chloride = 0.537 mg = \(5.37\times 10^{-4}g\)      \((1mg=0.001g)\)

Volume of solution = 400 ml = 4 dL     (1ml=0.01dL)

Thus concentration of mercury (I) chloride in g/dL is = \(\frac{5.37\times 10^{-4}g}{4dL}=1.34\times 10^{-4}g/dL\)

The concentration in g/dL of the chemist's mercury(I) chloride solution is \(1.34\times 10^{-4}\)

The piece of information most useful in evaluating this claim is the research study the group cites as evidence was proven to be inaccurate (Option C).

A relatively recent publication indicated that certain vaccines might produce autism in children, thereby raising concerns about their use.

However, it has been shown that the scientific evidence in this publication may be erroneous and therefore the publication was retracted.

In conclusion, The piece of information most useful in evaluating this claim is the research study the group cites as evidence was proven to be inaccurate (Option C).

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Answer:

75.9 KPa

Explanation:

From the question given above, the following data were obtained:

Initial volume (V1) 20000 L

Initial pressure (P1) = 748 kPa

Initial temperature (T1) = 525 K

New temperature (T2) = 293 K

New volume (V2) = 110000 L

New pressure (P2) =?

The new pressure pressure of the gas can be obtained by using the general gas formula as illustrated below:

P1V1 / T1 = P2V2 / T2

748 × 20000 / 525 = P2 × 110000 / 293

14960000 / 525 = P2 × 110000 / 293

Cross multiply

P2 × 110000 × 525 = 14960000 × 293

P2 × 57750000 = 4383280000

Divide both side by 57750000

P2 = 4383280000 / 57750000

P2 = 75.9 KPa

Thus, the new pressure of the gas is 75.9 KPa

Answer:

I need to se the options

Answer:

The term “flat bone” is somewhat of a misnomer because, although a flat bone is typically thin, it is also often curved. Examples include the cranial (skull) bones, the scapulae (shoulder blades), the sternum (breastbone), and the ribs. Flat bones serve as points of attachment for muscles and often protect internal organs.

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Answer:

its b

Explanation:

This element is in group 1.

According to the octet rule, this element would be expected to form an ion with a charge of +1.

If X is in period 5, the ion formed has the same electron configuration as the noble gas Krypton

The symbol for the ion is Rb⁺

Electronic configuration refers to the arrangement of electrons in the orbitals of an atom or molecule, indicating the energy level of the electrons, the number of electrons in each energy level, and the number of electrons in each orbital.

Considering the given element:

It has one valence electron, hence it is in group 1. Group 1 elements form ions with a charge of +1.

Losing one electron will give the ion the same electron configuration as Kyrton since it is the noble gas in Period 4.

The element is rubidium and the ion is Rb⁺.

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Answer:

Approximately 1.62894 x 10^24 atoms.

Explanation:

To determine the number of atoms in 2.7 moles of titanium, we need to use Avogadro's number, which is the number of atoms in one mole of an element.

Avogadro's number is approximately 6.022 x 10^23. This means that one mole of any substance contains 6.022 x 10^23 particles (atoms or molecules).

The molar mass of titanium is approximately 47.87 g/mol.

To calculate the number of atoms in 2.7 moles of titanium, we can use the following formula:

number of atoms = (number of moles) x Avogadro's number

number of atoms = 2.7 moles x 6.022 x 10^23 atoms/mole

number of atoms = 1.62894 x 10^24 atoms

Therefore, 2.7 moles of titanium contains approximately 1.62894 x 10^24 atoms.

Answer: 23 atoms

Explanation:

1 mole is 6.02x10

1 mole = atomic mass

Electrolysis is a technique that separates natural elements. It is commercially used to obtain important materials (e.g., pure metals) for construction.

Electrolysis refers to the use of an electric current to trigger non-spontaneous chemical reactions.

This technology (electrolysis) is commercially important in industry, construction and therefore also in architecture in order to extract metals and minerals from the ground.

Electrolysis uses particular electrolytic cells in order to extract highly pure metals from ores.

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Answer: Electrolysis is a technique that separates natural elements. It is commercially used to obtain important materials (e.g., pure metals) for construction.

Electrolysis refers to the use of an electric current to trigger non-spontaneous chemical reactions.

This technology (electrolysis) is commercially important in industry, construction and therefore also in architecture in order to extract metals and minerals from the ground.

Electrolysis uses particular electrolytic cells in order to extract highly pure metals from ores.

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In the given reaction, the reactants are hydrochloride acid (HCI) and sodium hydroxide (NaOH). The products are sodium chloride (NaCl) and water.

The chemical equation provided represents a neutralization reaction between hydrochloric acid (HCI) and sodium hydroxide (NaOH) in aqueous solution.

A neutralization reaction is a type of double displacement reaction in which an acid and a base react to form salt and water.

The reactants in this equation are hydrochloric acid (HCI) and sodium hydroxide (NaOH). Hydrochloric acid is a strong acid that dissociates in water to form hydrogen ions (H+) and chloride ions (Cl-). Sodium hydroxide, on the other hand, is a strong base that dissociates in water to form sodium ions (Na+) and hydroxide ions (OH-).

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\(1.409 \times {10}^{24} \: \: atoms\)

Explanation:

Convert from moles to atoms:

2.34 mol titanium (Ti)

Determine the amount of substance, n:

n = 2.34 mol

Look up Avogadro's constant, \( N_A\) , to find the number of atoms in a mole:

\( N_A\) = 6.022×10^23 atoms/mol

Multiply n by \( N_A\) to convert to the number of atoms, \(N_{atoms}\):

Precise Answer:

\( N_{atoms} \) = n× \( N_A \)= (2.34 mol)/1×(6.022×10^23 atoms)/(1 mol) = 1.409×10^24 atoms

From the solution that we have in the question;

The equilibrium constant, denoted as K, is a value that quantitatively represents the ratio of the concentrations of products to reactants at equilibrium in a chemical reaction.

It is a fundamental concept in chemical equilibrium.

The value of the equilibrium constant provides valuable information about the position of equilibrium and the relative concentrations of species involved in a chemical reaction.

Kc = [X] [Y]/[XY]

\(0.25 = (0.1 + x)^2/(0.5 - x)\)

\(0.25(0.5 - x) = (0.1 + x)^2\)

\(0.125 - 0.25x =0.01 + 0.2x + x^2\\ x^2 + 0.45x - 0.115 = 0\)

x = 0.18 M

The equilibrium amount of X and Y=  0.28 M and the equilibrium concentration of XY = 0.32 M

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Based on the answer to the question that we have;

The ratio of the product to reactant concentrations in a chemical reaction at equilibrium is represented quantitatively by the equilibrium constant, abbreviated as K.

It is a cornerstone of the theory of chemical equilibrium.

A chemical reaction's equilibrium position and the relative concentrations of the species involved can both be learned from the equilibrium constant's value.

Kc = [X][Y]/[XY]

\(0.25 = (0.1 + x)^2/(0.5 - x)\\0.25(0.5 - x) = (0.1 +x)^2\\0.125 - 0.25x = 0.01 +0.2x +x^2\\= 0.18 M\)

The equilibrium concentration of;

XY =0.5 - 0.18

=0.32 M

Then the equilibrium amount of

X and Y is

0.1 + 0.18= 0.28 M.

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Answer:

C3H8 + 5O2 = 3Co2 + 4 H2o

Explanation:

we can balance this equation by algebric method ( ABC method)

There are 3.44 x 10^{22} particles in 0.057 moles of lithium bromide.

The lithium bromide formula also known as the lithium monobromide formula or Bromo lithium formula is explored. It is a counterion bromide-based salt of lithium.

we have to use Avogadro's constant,

Avogadro's constant, is approximately equal to 6.022 x 10^{22} particles per mole.

we can use the following formula:

number of particles = moles x Avogadro's constant

Substitute the values,

number of particles = 0.057 moles x 6.022 x 10^{23} particles/mol

Simplifying the equation

number of particles = 3.44 x 10^{22} particles

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The number of moles of ammonia present in a 7.686 g sample of ammonia, which has a molar mass of 17.030 g/mol is 0.45 moles.

HOW TO CALCULATE NUMBER OF MOLES:

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The volume of a 60% solution by mass that is prepared with 45 grams of a particular solute is 75 mL.

Firstly, to calculate the volume of the solution, we need to know the density of the solution. Since it is not mentioned in the question, we can assume it to be 1 g/ml.

Next, we can use the formula:

mass of solute = (mass of solution) x (percent by mass)

Here, the mass of solution is the mass of solute plus the mass of solvent.

Or, the mass of solute + the mass of solvent = the mass of solution

Therefore,

The mass of solvent = the mass of solution - the mass of solute

Substituting the values provided in the question, we get:

mass of solvent = (45) / (0.6) - 45 (since the solution is 60%)

mass of solvent = 75 - 45 = 30 g

Thus, mass of the solvent = 30g

Since volume = mass / density

The volume of the 60% solution = mass of solution / density

volume of solution = (45 + 30) / (1)

volume of solution = 75 mL

Thus, 75 mL of the 60% solution by mass is made with 45g of solute.

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Explanation:

Bohr built on Nicholson's idea by adopting the requirement that the angular momentum can have only certain discrete values related to Planck's constant. However Bohr's atom has many orbits for the electrons.

Answer:

whats the question?

Explanation:

Answer:

double replacement

Explanation:

The reaction equation is given as:

       Pb(NO₃)₂  +  2KI   →   PbI₂ +   KNO₃

This reaction is a double displacement reaction.

In this form of reaction, there is an actual exchange of partners to form new compounds.

      AB + CD →  AD + CD

One of the following condition serves as driving force for the reaction:

Answer:

okokokokomokokok

Explanation:

njiuuhhhjkjnn

Answer: In an element’s square on the periodic table, the number with the greatest numerical value represents the (atomic mass).

Explanation: look at pic attached :

Answer:

Aye Wassup? Adam Here :D

Explanation:

Nitrogen dioxide is a chemical compound with the formula NO 2.It is one of several nitrogen oxides. NO 2 is an intermediate in the industrial synthesis of nitric acid, millions of tons of which are produced each year for use primarily in the production of fertilizers.At higher temperatures it is a reddish-brown gas.

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Answer:

Molar mass = 30.026 g/mol

Explanation:

Let Molar mass be mm

mm of CH2O = 12.01 + 2(1.008) + 16.00

= 12.01 + 2.016 + 16.00 = 30.026 g/mol

Answer:

\(\boxed {\boxed {\sf Almost \ all \ phosphates \ are \ insoluble}}\)

Explanation:

For magnesium phosphate to make an aqueous solution, it must be soluble in water.

Let's check the solubility rules. There are many different lists and versions, but it should mention a rule about phosphates.

Magnesium phosphate is included in "all phosphates" so it is insoluble and can't become an aqueous solution.

Magnesium Phosphate (Mg₃(PO₄)₂) would not make an aqueous solution because it is insoluble in water.

A solution is a homogeneous mixture of one or more solutes dissolved in a solvent.

According to the solubility rule, all phosphates are insoluble in water except sodium and potassium phosphates and thus magnesium phosphate does not form an aqueous.

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Answer:

Dependent: Vapor Pressure

Independent: Temperature

Explanation:

The thing that is being measured is the vapor pressure, so that is the dependent variable. The thing that is being changed in this experiment is the temperature so that is the independent variable.

The initial pressure exerted on the balloon was 8 atmospheres.

To find the initial pressure exerted on the balloon, we can use Boyle's Law, which states that the pressure of a gas is inversely proportional to its volume when temperature is constant. The formula for Boyle's Law is P1V1 = P2V2, where P1 and V1 represent the initial pressure and volume, and P2 and V2 represent the final pressure and volume.

In this case, we are given that the initial volume (V1) is 14 L and the final volume (V2) is double the initial volume (2 x V1). We are also given that the final pressure (P2) is 4 atmospheres. We need to find the initial pressure (P1).

Using the formula P1V1 = P2V2 and plugging in the given values, we have:

P1 * 14 = 4 * (2 * 14)

P1 * 14 = 4 * 28

P1 * 14 = 112

To isolate P1, we divide both sides of the equation by 14:

P1 = 112 / 14

P1 = 8

It's important to note that the unit of pressure in this case is atmospheres, as stated in the question. If the pressure unit had been different, appropriate unit conversions would have been necessary.

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Answer:

volume

Explanation:

Answer:

The next one's are B and 0.245

Explanation:

Note that the above prompt on Ecology draws it's analysis form a well known story which have been told visually called "The Lion King".

The answers are:

1) Biotic Factors, simply put are living things

2 examples of things from Lion King Introduction are:

3) Abiotic factors are Non -living things.

4) Examples from the introduction are:

5) the symbiotic relationship is called: commensalism.

Long-term biological interactions known as commensalism occur when individuals of one species benefit while those of the other species suffer neither advantages nor harm.

Ecology which is the study of the environment, allows  a person  to comprehend how different types of creatures coexist in various kinds of physical settings.

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Full Question:

Although part of your question is missing, you might be referring to this full question:

1) What is Biotic Factors

2) List three biotic factors from the Lion King introduction

3) What is Abiotic factors?

4) List three Abiotic factors from the Lion King introduction

5) The bird riding on the tusks of the elephant feed on insects the elephant stirs up. What kind of symbiotic relationship exists between the two?