(1) The total heat capacity of a Bomb-type calorimeter, C, can be obtained from a sample with a known value of reaction heat. Assume that 0.500 g of benzoic acid (C 3
​
H 3
​
COOH . ​
molar mass is 122.12 g/mol ) completely burns in a steel bomb (with oxygen) of a bomb calorimeter containing 1209 g of water. The temperature of the system increases from 296.35 K to 298.59 K. It is known that the reaction heat effect of complete combustion of benzoic acid under these conditions is −3226KJ/mol. The specific heat capacity of water is 4.184 J/g/K. Try to calculate the heat capacity of the Bomb-type calorimeter.

Answer:

C Ian sure2.94atm

Explanation:

I am low student

The molarity of the barium chloride solution is 0.2 M.

To determine the molarity of the solution, we need to use the formula:

Molarity (M) = moles of solute / liters of solution

First, we need to determine the number of moles of barium chloride present in the solution. We can do this by dividing the given mass of the solute by its molar mass:

moles of \(BaCl_2\) = 40.4 g / 208.23 g/mol = 0.194 moles

Next, we can plug this value into the molarity formula:

Molarity (M) = 0.194 moles / 3.0 L = 0.0647 M

Therefore, the molarity of the barium chloride solution is 0.0647 M.

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By first vaporising the component and then condensing the vapour back into a liquid form, distillation purifies a compound.

The fundamental idea underpinning distillation is that different liquid mixtures may be distinguished by the difference in their boiling points. When a liquid's vapour pressure reaches atmospheric pressure, that temperature is known as the boiling point. This technique divides liquids into volatile and non-volatile categories.

It is then boiled after being placed in the RB flask. The more volatile or lower boiling point component evaporates more quickly and is collected in a different container. Condensation is accelerated with the aid of a condenser.

For instance, distillation can be used to separate a chloroform and aniline mixture. Aniline has a boiling point of 189°C while chloroform has a boiling point of 60°C. Thus, a mixture of chloroform and aniline can be separated by distillation.

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Answer:

Not so sure. Hope it helps...

The atom with the electron configuration 1s²2s²2p⁶3s²3p⁶4s²3d⁷ is Co.

The electron configuration of an atom is the arrangement of the atom's electrons in its energy levels. Each element has a unique electron configuration that determines its properties and behavior.

In this case, the electron configuration given is 1s²2s²2p⁶3s²3p⁶4s²3d⁷. To find the element that corresponds to this configuration, we need to add up the number of electrons in each energy level.

Adding these up, we get a total of 27 electrons. The element with 27 electrons is Cobalt (Co), so that is the answer.

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Answer:

A = ₋₁⁰e

Explanation:

Alpha beta and gamma radiations are the examples of ionizing radiations. When an atom is an excited state and having high energy, the atom is in unstable state. The excess of energy is released by the atom to get the stability. The released energy is in the form of radiations which may include alpha, beta, gamma, X-ray etc.

Beta radiations:

Beta radiations are result from the beta decay in which electron is ejected. The neutron inside of the nucleus converted into the proton an thus emit the electron which is called β particle.

The mass of beta particle is smaller than the alpha particles.

They can travel in air in few meter distance.

These radiations can penetrate into the human skin.

The sheet of aluminum is used to block the beta radiation

⁶⁷₂₉Cu   →   ⁶⁷₃₀Zn + ⁰₋₁e

The beta radiations are emitted in this reaction. The one electron is ejected and neutron is converted into proton.

Answer:

A. beta particle,

0−1e

Explanation:

i just finished mine and it was correct

Wegener suggested that the deserts of Africa were once covered in ice and that the striations were formed by the movement of the ice across the desert floor.

Glacier striations are grooves or scratches in the bedrock that have been created by a glacier sliding over the surface. They are typically found in areas where the ice has melted away, revealing the bedrock beneath.

Wegener suggested that the deserts were once wetter and lusher. He proposed that the climate has gradually changed over time, making the deserts arider. This is supported by evidence of ancient riverbeds and lakes in the Sahara Desert.

Glacier striations can be used to help researchers learn about the history of a particular glacier and the climate in the area where it is located. For example, the direction of the striations can indicate the direction the glacier was moving and the depth of the striations can give clues about how deep the glacier was.

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The reactant that runs out first and The reactant that determines the maximum amount of product that can be formed in a reaction are the correct options.

:In a chemical reaction, a limiting reactant is the one that gets used up first, limiting the amount of product that can be formed. The limiting reactant determines the maximum amount of product that can be produced in a chemical reaction. The other reactants involved in the reaction are called excess reactants because they exist in abundance and do not limit the reaction.

\If the limiting reactant is completely consumed, the reaction ceases even if there is still an excess of other reactants left. Thus, the limiting reactant controls the reaction.

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TiCl₄+2H₂O⇔TiO₂+4HCl

The coefficient for titanium tetrachloride = 1

Equalization of chemical reactions can be done using variables. Steps in equalizing the reaction equation:

1. gives a coefficient on substances involved in the equation of reaction such as a, b, or c, etc.

2. make an equation based on the similarity of the number of atoms where the number of atoms = coefficient × index (subscript) between reactant and product

3. Select the coefficient of the substance with the most complex chemical formula equal to 1

Reaction

TiCl₄+H₂O⇔TiO₂+HCl

give coefficient

TiCl₄+aH₂O⇔bTiO₂+cHCl

Ti, left=1, right=b⇒b=1

Cl, left=4, right=c⇒c=4

H, left=2a, right=c⇒2a=c⇒2a=4⇒a=2

O, left=a, right=2b⇒a=2b⇒2=2.1⇒match

Balanced equation :

TiCl₄+2H₂O⇔TiO₂+4HCl

Answer:

the coefficient of TiCl4 would be 1

Answer:

0

Explanation:

Positive Change of 2 cancels the negative charge of 2

To see the number of atoms of an element in a given molecule we need to multiply stoichiometry to the number that is written on the foot of the element that is stoichiometry. Therefore, the overall charge of atom that contains 2 electron and 2 proton is zero.

Atom is the smallest particle of any element, molecule or compound. Atom can not be further divided. Atoms contains nucleus in its center and electron that revolve around the atom in fixed orbit.

In the nucleus, proton and neutron are present. Electron has -1 charge while proton has +1 charge. Neutron is neutral that is it has no charge. So overall the charge of nucleus is due to only proton, not by neutron. The overall charge of atom that contains 2 electron and 2 proton is zero.

Therefore, the overall charge of atom that contains 2 electron and 2 proton is zero.

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Answer:

C4H802

Explanation:

Empirical formula is the simplest formula so you break the compound to its simplest form

If it was helpful kindly follow

Carbon dioxide and particulates are emitted by volcanoes. Particulates form stratospheric aerosols that reflect sunlight The impact of atmospheric carbon dioxide and stratospheric aerosols can be briefly described below.

Carbon dioxide (CO₂): Carbon dioxide is a greenhouse gas that contributes to the greenhouse effect and global warming. It is released into the atmosphere through various human activities, such as the burning of fossil fuels and deforestation. The increasing concentration of CO₂ in the atmosphere is a significant driver of climate change.

Stratospheric aerosols: Stratospheric aerosols, formed by the release of particulates from volcanic eruptions or human activities, can have a cooling effect on the Earth's climate. These aerosols reflect sunlight back into space, reducing the amount of solar radiation that reaches the Earth's surface. As a result, they can temporarily offset some of the warming caused by greenhouse gases like CO2.

It's important to note that while stratospheric aerosols can have a cooling effect, they are relatively short-lived in the atmosphere compared to CO₂. Carbon dioxide, on the other hand, has a long residence time and accumulates over time, leading to long-term warming.

Therefore, the overall impact of increasing atmospheric CO₂ concentrations outweighs the cooling effect of stratospheric aerosols.

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To calculate the amount of sylvanite needed to obtain 66.0 g of gold, we can use the fact that sylvanite contains 28.0% gold by mass.

Let's assume the mass of sylvanite needed is x grams.

The amount of gold in the sylvanite can be calculated by multiplying the mass of sylvanite (x) by the percentage of gold it contains (28.0% or 0.28):

Gold in sylvanite = x * 0.28

According to the problem, we want to obtain 66.0 g of gold. Therefore, we can set up the equation:

x * 0.28 = 66.0

To solve for x, we divide both sides of the equation by 0.28:

x = 66.0 / 0.28

Performing the calculation:

x = 235.71 g

Therefore, you would need to dig up approximately 235.71 grams of sylvanite to obtain 66.0 grams of gold.

To obtain 66.0 grams of gold, you would need to dig up approximately 235.71 grams of sylvanite.

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Answer:

Renewable

Explanation:

Reformed means it can be used multiple times, like renewable

The number of electrons required to create a spark between two electrodes depends on various factors such as the distance between the electrodes, the material of the electrodes, and the voltage difference applied between them.

The process of creating a spark involves the transfer of electrons from one electrode to the other, causing a discharge of electricity in the form of a spark.

This transfer of electrons occurs due to the buildup of charge on the electrodes, which leads to a potential difference that results in the movement of electrons.

The exact number of electrons required for this process depends on the aforementioned factors and can vary widely.

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If more air molecules will be introduced into the bag and the pressure of the air molecules will decrease inside the bag according to Boyle's law.

Boyle's law states that the volume of a given mass of gas is inversely proportional to its pressure at constant temperature.

If we continue to inflate the airbag, more air molecules will be introduced into the bag and the pressure of the air molecules will decrease inside the bag according to Boyle's law.

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Answer:Yes DNA is an acid.

Explanation:It’s in the name,Deoxyribonucleic Acid.Built with both acids an basic components ,the acidic part if dna is in the phosphate group while the basic components are in the nitrogenous base of it.

47.78 grams of Na₃ AlO₃ is produced when  6 × 10²³ molecules of NaOH are consumed.

An equation for a chemical reaction is said to be balanced if both the reactants and the products have the same number of atoms and the total charge for each component of the reaction.

The balanced equation:

2 Al + 6 NaOH --------> 2 Na₃ AlO₃ + 3 H₂

We have 6 × 10²³ molecules of NaOH.

So, the mass of Na₃ AlO₃ will be:

= 6 × 10²³ molecules NaOH × ( 1 mol NaOH / 6.023 × 10²³ molecules NaOH ) × ( 2 mol Na₃ AlO₃ / 6 mol NaOH) × ( 143.9 g Na₃AlO₃ / 1 mol Na₃ AlO₃ )

= 47.78 g Na₃ AlO₃

The mass of Na₃ AlO₃ produced when 6 × 10²³ molecules of NaOH are consumed is 47.78 grams.

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For a current of 15.0 A is passed through molten magnesium chloride for 15.0 hours, the amount of moles of magnesium metal   is mathematically given as

M=4.2mole

Generally, the equation for the Chemical reaction  is mathematically given as

Mg+2e---->Mg

Therefore

Charge=Currect*time

Q=15*5*4.0*10^4

Q=8.10*10^5C

In conclusion, the number of moles

8.10*10^5C*1M/(2*96500)

M=4.2mole

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a. When the fabric strip was treated with the Test Identification Stain, it underwent a chemical reaction that caused a color change.

b. This dye can be used in forensic science to identify different types of fibers or to determine if a particular fabric was present at a crime scene.

When the fabric strip was treated with the Test Identification Stain, it experienced a change in color as the stain reacted with the fibers in the fabric. This color change indicates the presence of specific components or substances within the fabric.The dye in the stain reacted with the fibers of the fabric, resulting in a visible color change.

The dye can be used as a diagnostic tool to identify and distinguish between various types of fibers, materials, or even contaminants in the fabric. By observing the color change and comparing it to known standards, you can gain valuable information about the composition and properties of the fabric.

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The substance that has a higher density in liquid form than solid is water, which is why bodies of water tend to have warmer water on top and colder water at the bottom.

When most substances solidify, their molecules come closer together, making the solid more dense than the liquid form. However, water molecules have a unique arrangement in solid form (ice) where they form a lattice structure with spaces in between. This makes ice less dense than liquid water, causing it to float. The density of liquid water is highest at 4 degrees Celsius.

Water's unique property is due to its hydrogen bonding. When water freezes, its molecules arrange themselves into a hexagonal pattern, creating more space between the molecules. This results in a lower density in its solid state (ice) compared to its liquid state.

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"The species that would be expected to have the highest concentration in the 0.1 M solution of H₂S is HS⁻ (option c)."

In a 0.1 M solution of hydrogen sulfide (H₂S), the species that would be expected to have the highest concentration depends on the dissociation equilibrium of H₂S. Hydrogen sulfide is a weak diprotic acid, meaning it can donate two protons (H⁺) in separate steps. The dissociation of H₂S can be represented as follows:

H₂S ⇌ H⁺ + HS⁻ (Equation 1)

HS⁻ ⇌ H⁺ + S²⁻ (Equation 2)

To determine which species will have the highest concentration, we need to examine the acid dissociation constants (Ka) for these equilibria.

From Equation 1, the equilibrium constant expression can be written as:

Ka1 = [H⁺][HS⁻] / [H₂S]

From Equation 2, the equilibrium constant expression can be written as:

Ka₂ = [H⁺][S²⁻] / [HS⁻]

In a dilute solution like 0.1 M, we assume that the dissociation of H₂S is incomplete, so we can make the approximation [H₂S] ≈ 0.1 M. Therefore, the concentration of H₂S is approximately constant.

Now, let's consider the pKa values for these equilibria. The pKa1 value for H₂S is approximately 7, and the pKa₂ value for HS⁻ is approximately 14.

Since pKa₁ is lower than pKa₂, it means that the equilibrium represented by Equation 1 is more favorable than the one represented by Equation 2. Thus, at equilibrium, the concentration of HS- will be higher than that of S2-.

Therefore, the species that would be expected to have the highest concentration in the 0.1 M solution of H₂S is HS⁻ (option c).

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Answer:

B:Selective breeding

Explanation:

Selective breeding is when someone picks animals with desired traits. A example would be cows, if you want cows offspring to produce more milk than you would select cows that are producing the greatest amount of milk at the moment.

Answer:

Cl has 7 dots

if its Cl2; Cl-Cl it will contain 14 dots

Explanation:

The electron-dot formula of the chlorine molecule Cl₂is shown in the attached diagram below.

A lewis electron dot structure is used to represent the number of bonds, the bonding atoms, and the lone pairs left in the atoms in the molecule.

Lines are shown between atoms that are bonded to one another and excess electrons or lone pairs are represented as dot pairs and are placed next to the atoms.

As the valence electrons of each chlorine atom are equal to seven from the electronic configuration of the chlorine atom.

First, the total number of valence electrons in a chlorine molecule is 7 + 7 = 14.

As each chlorine atom needs only one electron to complete its octet. As the octet completes, the rest of the electrons are assigned as the lone pairs of atoms. Therefore, each chlorine atom has three lone pairs of electrons on it.

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Answer:

Here's what I get from one source.

Explanation:

\(\begin{array}{lc}\textbf{Source} &\textbf{Contribution \%} \\\text{Space heating }& 45\\\text{Water heating} &18\\\text{Space cooling} & 9 \\\text{Computers/Electronics} & 6 \\\text{Lighting} & 6 \\\text{Cooking} & 4 \\\text{Refrigeration} & 4 \\\text{Wet cleaning} & 3 \\\text{Other} & 5 \\\end{array}\)

The pie chart is in the Figure below.

Approximately 4929 tantalum atoms would have to be laid side by side to span a distance of 1.40 mm.

Given the radius of a tantalum atom = 142 pm

Distance to be spanned = 1.40 mm

The conversion factor for length is 1 pm = 1 x 10^-12 m1 mm = 1 x 10^-3

hence, the distance in meters is:

1.40 mm = 1.40 x 10^-3 m

Now, to find the number of tantalum atoms required to span the distance of 1.40 mm, we need to first find the distance spanned by a single tantalum atom. We know that the radius of the tantalum atom is 142 pm. Hence, the distance spanned by a single tantalum atom will be twice the radius.

Therefore, the distance spanned by a single tantalum atom is:

2 x radius = 2 x 142 pm = 284 pm= 284 x 10^-12

Now, we can find the number of atoms required by dividing the total distance by the distance spanned by a single atom.

Therefore: The number of tantalum atoms = Distance to be spanned / distance spanned by a single atom

= 1.40 x 10^-3 m / 284 x 10^-12 m

= 4929.577464788732

≈ 4929 tantalum atoms (rounded to the nearest whole number)

Hence, approximately 4929 tantalum atoms would have to be laid side by side to span a distance of 1.40 mm.

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Answer:

The s orbital is lower in energy than the p orbital  

Explanation:

S-orbital electrons are simultaneously closer to the nucleus (more stable) and farther from the nucleus (less stable) compared to the corresponding p-orbitals. This makes them favorable to occupy when no p-electrons are present, but less favorable to occupy when p-electrons are present, which is why they are filled first but ionize first.

Answer:

Salmonella

Poultry

Explanation:

I'm a cook. :D

Answer:

just put random words thats what i always do i never got a grade lower than c

If you compare 1 M Nacl solution, 1M glucose solution and 1M sucrose solution,1M Nacl solution is more hypertonic due to the dissociation of ions in the solution.

Of the two solutions the solution with higher osmotic pressure is called hypertonic. The extra pressure developed on the solution side due to the diffusion of solvent from its high amount through a semipermeable membrane is called the osmotic pressure.

    Osmotic pressure= icRT

     Where, i= van't hoff factor

                  c= concentration

                   R=Gas constant

                   t= temperature

The extent of dissociation or association of a solute in solution is expressed in terms of the van't hoff factor.

In 1M Nacl, as Nacl dissociates into ions in the solution its van't hoff factor becomes 2. In  1 M glucose it doesn't dissociate into ions. So van't hoff factor remains 1. And In 1 M sucrose,as  it does not dissociate into ions van't hoff factor  remains 1. So here Nacl has more osmotic pressure.

So, Nacl is hypertonic because of its dissociation into ions in the solution.

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