solid barium fluoride has the same kind of crystal structure as caf2 which is pictured below: how many f- ions are there per unit cell in solid barium fluoride?

Answer:

Coefficient = 1.58

Exponent = - 5

Explanation:

pH = 2.95

Molar concentration = 0.0796M

Ka = [H+]^2 / [HA]

Ka = [H+]^2 / 0.0796

Therefore ;

[H+] = 10^-2.95

[H+] = 0.0011220 = 1.122 × 10^-3

Ka = [H+] / molar concentration

Ka = [1.122 × 10^-3]^2 / 0.0796

Ka = (1.258884 × 10^-6) / 0.0796

Ka = 15.815 × 10^-6

Ka = 1.58 × 10^-5

Coefficient = 1.58

Exponent = - 5

If a sample contained 3.01 x 10²³ atoms of tellurium, that would be 63.8grams.

no. of moles = 3.01 x 10²³ ÷ 6.02 × 10²³

no. of moles = 0.5mole

Mass of tellurium = 127.6g/mol × 0.5

Mass of Tellurium = 63.8grams.

Therefore, if a sample contained 3.01 x 10²³ atoms of tellurium, that would be 63.8grams.

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Answer:

The height = 39.44 m

Explanation:

Given:

Mass m = 2.5 kg

Potential energy = 986 J

Find:

The height

Computation:

Potential energy = mgh

g = Acceleration due to gravity = 10 m/s²

986 = (2.5)(10)(h)

h = 39.44 m

The height = 39.44 m

Answer:

Ar

Explanation:

does not react with anything it has a full electron shell so it does not combine and it is a noble gas

Answer:

Not exactly such but Experimental manipulation describes the process by which researchers purposefully change, alter or influence the independent variables(IVs), which are also called treatment variables or factors in an experimental research design.

Equilibrium is a state in a chemical reaction where the rate of the forward reaction is equal to the rate of the reverse reaction, resulting in no net change in the concentrations of reactants and products. It is represented by a double arrow (⇌) in chemical equations. In the given equation: H₂O (g) + CO (g) ⇌ H₂(g) + CO₂(g) + 42 KJ

To shift the equilibrium to the right, one or more of the following could occur:

Increasing the concentration of H₂ or CO₂

Decreasing the concentration of H₂O or CO

Increasing the pressure

Removing some of the products (H₂ and CO₂)

Decreasing the temperature

To shift the equilibrium to the left, one or more of the following could occur:

Decreasing the concentration of H₂ or CO₂

Decreasing the pressure

Increasing the temperature

If pressure is increased, the equilibrium will shift in the direction that produces fewer moles of gas. In this case, since there are fewer moles of gas on the right side of the equation (H₂ and CO₂), the equilibrium will shift to the right. If heat is added, the equilibrium will shift in the endothermic direction to absorb the additional heat. In this case, the forward reaction is endothermic (42 KJ on the right side), so the equilibrium will shift to the right to consume the added heat.

If CO is added, the equilibrium will shift to the right to consume the additional CO.The concentration of H₂O and CO₂ will increase, while the concentrations of H₂ and CO will decrease until a new equilibrium is reached.

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Answer:

People show more interest in personal broadcasting.

Explanation:

The art of oration (speaking) is being  replaced by personal broadcasting mean now people used webcam or camcorder for creating its own content and transmit it to other people through internet. Personal broadcasting provides audio and video to the individual that make it more interesting as compared to oration. People show more interest in personal broadcasting as compared to oration so that's why oration is replaced by personal broadcasting.

Answer:

H20

Explanation:

The acronym (I) used means it is liquid.

hope this helps

The energy of the system is  -0.17 eV. There are 9 subshells in this shell. There are 9 electron orbits in the main shell.  The maximum number of electrons that would fit in the n = 9 shell is 162.

The energy of the Hydrogen atom with the electron in the n = 9 shell can be calculated using the formula:

\($$E_n = -\frac{13.6}{n^2} \ eV$$\)

where n is the principal quantum number. So, substituting n = 9:

\($$E_9 = -\frac{13.6}{9^2} \ eV = -0.17 \ eV$$\)

Therefore, the energy of the Hydrogen atom with the electron in the n = 9 shell is -0.17 eV.

In the n = 9 shell, there are 9 subshells. This is because the maximum number of subshells in a shell is equal to the value of the principal quantum number.

In the n = 9 shell, there are 9 electron orbits. This is because the maximum number of electron orbits in a shell is equal to the value of the principal quantum number.

In the n = 9 shell, the maximum number of electrons that can fit is given by the formula:

\($$2n^2 = 2(9)^2 = 162$$\)

Therefore, the maximum number of electrons that would fit in the n = 9 shell is 162.

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Answer:

The solvent is deionised water

The solute is AgNO3

The solution is [Ag(aq) + NO3(aq)-]

Explanation:

Answer:(a) electrons

(b) nucleus

(c) protons

(d) neutrons

(e) mass number

Explanation:

Answer:

A. The functions within the ecosystem will eventually stop & everything will die off.

Explanation:

Everything is dependent on the sun --starting from the bottom of the food chain, the producers. However, we wouldn't die instantly because "Earth retains heat fairly well, so humans wouldn't freeze instantly."

The corn starch and water will stay separated and eventually sit in the glass as layers. This is due to the 2 fluids having different densities far enough from one another that the fluids do not mix.

Answer:

Cornstarch and water mixed acts both like a solid and a liquid.

Explanation:

Cornstarch and water is a suspension mixture with a solid dispersed into a liquid. When you press the mixture quickly, the starch molecules close together. This causes the water to get trapped between the starch chains and create a semi-rigid structure.

In the modern periodic table, elements are arranged in the order of their increasing atomic numbers.

The periodic table is a chart that is used for organizing the chemical elements. It's a table that categorizes and organizes the elements based on their chemical properties, electronic configuration, and atomic structure, among other factors. This table is used to predict the chemical reactions between elements.

The table's position of elements is determined by the number of electrons in the outermost shell or valence shell of their atoms, which is known as the atomic number. Mendeleev created the first periodic table, which was organized by atomic mass.

In the modern periodic table, elements are arranged in order of increasing atomic number, which means that the number of protons in an atom's nucleus determines its position on the table.

Thus, option B is the correct answer.

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Answer:

The indroduction of lizards in this marshy habitat may lead to severe alterations of its own ecosystem. Since the lizards and frogs are both species who feed on small insects, the insect population might begin to decrease around the area. Furthermore, if insects have lessened in the marsh, that means food for the lizard as well as for the frog. In an extreme scenario, unless the two species adapt to these new conditions, their population may rapidly decrease.

Answer:

Small frogs living in a marshy region feed on small insects in the region. The relationship between the frogs and insects is a  commensal-host  relationship. A particular species of lizards is introduced into the marshy land. These lizards also start feeding on these insects. The introduction of lizards may lead to  competition between lizards and frogs for food .

As per the given question, the mass of NO3-ion in the final solution is approximately 0.011 g or 0.0542 g (rounded to four decimal places). Hence, the correct option is 0.0542 g.

Given that a student dissolved 4.00 g of Co(NO3)2 in enough water to make 100 mL of stock solution, He took 4.00 m

L of the stock solution and then diluted it with water to give 275. m

of a final solution.

The molar mass of Co(NO3)2 = 165 g/mol

The molar mass of NO3- = 62 g/mol

The molarity of the stock solution = (4.00 g / 165 g/mol) / (100. mL / 1000 mL/L)

= 0.0242 M

We can use the equation; M1V1 = M2V2 where,

M1 is the initial molarity of the solution,

V1 is the initial volume of the solution,

M2 is the final molarity of the solution, and

V2 is the final volume of the solution.

Substituting the values in the above equation,0.0242 M × 4.00 mL

= M2 × 275 mLM2

= 0.000331 The MNO3- ion, Co(NO3)2, dissociates into Co2+ and NO3-. The number of NO3-ions produced is equal to the number of Co(NO3)2 molecules dissociated, which is 12.

Therefore, the concentration of NO3- ion is 2 × 0.000331 M

= 0.000662 M.

The mass of the NO3 ion in the final solution can be calculated as follows:

Mass of NO3- ion = concentration of NO3- ion × volume of the final solution × molar mass of NO3- ion

= 0.000662 M × 275 mL × 62 g/mol

= 11.22 g

≈ 0.0112 g

≈ 0.011 g

Therefore, the mass of NO3-ion in the final solution is approximately 0.011 g or 0.0542 g (rounded to four decimal places). Hence, the correct option is 0.0542 g.

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Answer:

More mass means more force is needed to achieve the same change in speed in the same amount of time. That force is transmitted from the road, to the tires, to the wheels, through the brakes, to the frame and rider.

The weight on a bicycle affects the force required to accelerate it as it increases inertia it will slow down its rate of acceleration.

Acceleration is defined as the rate of change of velocity of an object with respect to time. These are vector quantities which have magnitude as well as direction.

The orientation of the acceleration of an object as given by the orientation of the net force acting on that object. It is expressed as:

\(\overline{a} = \frac{v - v_0}{t} = \frac{\Delta v}{\Delta t}\overline{a} = average acceleration\\v = final velocity\\v_0 = starting velocity\\t = elapsed time\)

Acceleration is proportional to the force applied, so the greater the force, the greater the speed of the object in the direction of the force. Mass is inertia, which is the reluctance to accelerate, so for the same force, more massive objects experience smaller acceleration than less massive objects.

Thus, the weight on a bicycle affects the force required to accelerate it as it increases inertia it will slow down its rate of acceleration.

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Answer:

B. hydrogen bonding

Explanation:

Waxy surfaces are non-polar while also water is polar. There is a difference in electronegativity between the atoms O and H, in which O is more electronegative than H. Such a difference in electronegativity causes the two covalent O-H bonds to become polar in water, where O atom has a partial negative charge, and the H atom has a partial positive charge.

Therefore from the above explanation the correct answer is B

Plasmas are less dense than solids or liquids and have no set shape or volume. Plasmas are made up of atoms with some or all of their electrons stripped away and positively charged nuclei, known as ions, roaming freely.

Plasmas is defined as a type of substance in which numerous electrons freely roam around the nuclei of the atoms.

Plasma has been referred to as the fourth state of matter, alongside solid, liquid, and gas.

When one or more electrons are ripped from an atom, they form a plasma.

Thus, plasmas are less dense than solids or liquids and have no set shape or volume. Plasmas are made up of atoms with some or all of their electrons stripped away and positively charged nuclei, known as ions, roaming freely.

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When 224 g of calcium carbonate(CaCO3) decomposes , 2.24 moles of carbon dioxide is produced.

When calcium carbonate decomposes in the presence of heat, it produces calcium oxide and carbon dioxide. This reaction is represented by the following equation:

CaCO3 ⇒ CaO + CO2

It is clear from the above equation that,

1 mole of CaCO3 produces 1 mole of CO2

Or 100 g of CaCO3 produces 1 mole of CO2

Thus, 224 g of CaCO3 produces 1/100 x 224 = 2.24 moles of CO2

Therefore, if 224 g of calcium carbonate(CaCO3) decomposes, 2.24 moles of carbon dioxide is produced.

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Coal could not be considered as substitute products for industrial electricity generation as it is limited and non-renewable in nature.

Generally, coal is defined as a type of sedimentary deposit that is composed predominantly of carbon that is readily combustible. Coal is usually black or brownish-black in color and coal has a composition that which include inherent moisture and consists of more than 50 percent by weight and more than 70 percent by volume of coal contains carbonaceous material.

Coal is classified as a nonrenewable energy source because more than millions of years are required to form coal. The energy which are stored in coal is formed by plants that lived hundreds of millions of years ago in dense and swampy forests.

Hence, Coal could not be considered as substitute products for industrial electricity generation as it is limited and non-renewable.

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There were 1.58 x 10^20 atoms of calcium left on the paper.

To determine the number of calcium atoms in CaCO3, we first need to know the molecular formula weight of CaCO3, which is 100.0869 g/mol.

Then, we can use this formula to calculate the number of moles of CaCO3:

moles of CaCO3 = mass of CaCO3 / molecular weight of CaCO3

mass of CaCO3 = (1.57 x 10^22 atoms) x (100.0869 g/mol / 6.022 x 10^23 atoms/mol) = 2.62 x 10^-2 g

Now we can calculate the number of moles of CaCO3:

moles of CaCO3 = 2.62 x 10^-2 g / 100.0869 g/mol = 2.62 x 10^-4 mol

number of calcium atoms = moles of CaCO3 x Avogadro's number

number of calcium atoms = 2.62 x 10^-4 mol x 6.022 x 10^23 atoms/mol = 1.58 x 10^20 atoms

Therefore, there were 1.58 x 10^20 atoms of calcium left on the paper.

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The enzyme β-ketothiolase cleaves off the acetyl-CoA molecule from the 3-ketoacyl-CoA, releasing acetyl-CoA and the remaining fatty acid chain forms acyl-CoA, which is two carbons shorter than the original fatty acid chain.

The complete reaction scheme for the catabolism of Oleoyl-CoA is given below:Oleoyl-CoA is broken down into acetyl-CoA, releasing 150 ATP molecules by the process of Beta-oxidation. The complete reaction scheme for the catabolism of Oleoyl-CoA is given below:

Step 1: Oleoyl-CoA is transported to the mitochondria matrix from the cytoplasm with the help of the carnitine shuttle system.

Step 2: The enzyme Acyl-CoA dehydrogenase catalyzes the removal of two hydrogen atoms from the alpha and beta carbons in the fatty acid chain and oxidizes it. This process forms a double bond between the alpha and beta carbon atoms, leading to the formation of trans-Δ2-enoyl-CoA.

Step 3: The enzyme enoyl-CoA hydratase adds a water molecule to the trans-Δ2-enoyl-CoA, converting it into L-3-hydroxyacyl-CoA.

Step 4: The enzyme L-3-hydroxyacyl-CoA dehydrogenase oxidizes L-3-hydroxyacyl-CoA, releasing a hydrogen ion (H+) and two electrons (2e-) and converts it into 3-ketoacyl-CoA.

Step 5: The enzyme β-ketothiolase cleaves off the acetyl-CoA molecule from the 3-ketoacyl-CoA, releasing acetyl-CoA and the remaining fatty acid chain forms acyl-CoA, which is two carbons shorter than the original fatty acid chain.

The cycle starts again, and this process is repeated until the fatty acid chain is completely degraded.

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No, the enthalpy of neutralization for weak acid-strong base reactions will not be the same as for strong acid-strong base reactions.

This is because weak acids do not react as readily and completely with strong bases as strong acids do, resulting in a lower enthalpy of neutralization. Additionally, the extent of the reaction between a weak acid and a strong base will depend on the relative strengths of the two reactants, as well as the concentrations of the reactants.

Therefore, the enthalpy of neutralization for a weak acid-strong base reaction can vary depending on the specific reaction and the concentrations of the reactants.

Any neutralization reaction between a strong acid and strong alkali actually comes down to the same thing i.e.

H⁺ + OH⁻-------> H₂O,

as all the other ions present are spectator ions and so don't play an active part in the reaction. As the overall reaction is always the same irrespective of the acid or alkali the enthalpy change will also be the same.

If a weak acid is used the enthalpy change will be less exothermic as some of the energy evolved will be canceled out by the energy needed to complete the dissociation of the incompletely dissociated acid during the reaction

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Answer:

Increasing the H+/H3O+ will decrease the pH, while increasing the OH- ions will increase the pH

Explanation:

so pH=-log(H), which means that the smaller H gets to 0, the more the pH rises. The larger the H+ gets, the smaller the pH
if H is 1, then pH is 0
if H is 0.1, then pH is 1
if H is 0.01, then pH is 2
and so on
if H is 0.00000000000001, then the pH is 14
When OH goes up, H goes down, so
if OH is 0.00000000000001, then the ph is 0
if OH is 0.0000000000001, then the pH is 1
and so on
If the OH is 1, then the pH is 14

To calibrate a micropipette with oleic acid solution instead of water, you might choose oleic acid because its properties, such as viscosity or density, closely resemble the samples you will be handling.

By calibrating with a solution similar to the actual samples, you can achieve more accurate and precise measurements.

Calculating the thickness of a liquid layer is necessary because the volume of a liquid is directly related to its thickness. If you know the volume and the area of the layer, you can divide the volume by the area to obtain the thickness.

This information is useful in various applications, such as determining the thickness of coatings, films, or layers in scientific experiments or industrial processes. Understanding the thickness helps in characterizing materials, controlling processes, and ensuring desired outcomes.

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Complete question:

Calibrate your micropipet with oleic acid solution and not with wate? a Why must ou calculate the thickness of a liquid layer if you knew the volume and the area of ths layer?

Answer:

The reaction is endothermic

Explanation:

we know that the reactants had to get energy from its surroundings which means that the reaction is endothermic

If one form of a gene can mask the appearance of another form, that form is considered dominant over the other form. Option B.

According to Mendel, genes are usually made up of 2 alleles. These alleles can be the same or different. When the alleles are the same, the gene is said to be homozygous. If the alleles are different, the gene is said to be heterozygous.

When the two alleles that make up a gene are different, one will be dominant and the other will be recessive. The dominant gene masks the effect of the recessive gene. In other words, the recessive gene cannot be expressed as long as it coexists with the dominant gene. In order for it to be expressed, it has to be in two copies or a homozygous recessive form.

For the dominant allele, however, only one copy is needed for it to be expressed.

In summary, if one form of a gene can mask the appearance of another form, that form is considered dominant over the other form.

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