Which of the following statements distingush between a suspension and a colloid? (Select all that apply.) (15.4) A suspension is a homogenous mixture that settles out if left undisturbed. A suspension is a heterogenous mixture that does not settle out if left undisturbed. The particles dispersed in a colloid are much larger than those in a suspension and they easily settle out. A suspension is a homogenous mixture that does not settle out if left undisturbed. The particles dispersed in a colloid are much smaller than those in a suspension and do not settle out. A suspensiion is a heterogenous mixture that settles out if left undisturbed.

Answer:

122 grams of NH3 will be produced when 22 grams of H2 react completely.

Explanation:

First, we need to calculate the number of moles of H2 present in 22g of the substance:

Number of moles of H2 = Mass of H2 / Molar mass of H2

Number of moles of H2 = 22g / 2 g/mol = 11 mol

According to the balanced chemical equation, the reaction between H2 and N2 produces NH3 in a 3:2 ratio. This means that for every 3 moles of H2, 2 moles of NH3 are produced. We can use this ratio to calculate the number of moles of NH3 produced:

Number of moles of NH3 = (2/3) x Number of moles of H2

Number of moles of NH3 = (2/3) x 11 mol = 22/3 mol

Finally, we can use the molar mass of NH3 to convert the number of moles of NH3 to grams:

Mass of NH3 = Number of moles of NH3 x Molar mass of NH3

Mass of NH3 = (22/3) mol x 17 g/mol = 122 g (rounded to three significant figures)

Answer:

D

Explanation:

Acceleration = velocity/time

A = 2*20

A = 0.10 m/s²

Answer:

Oxidation occurs when a reactant loses electrons during the reaction. Reduction occurs when a reactant gains electrons during the reaction.

Answer:

Thus, we can say that the element is calcium. This can be clearly understood as ionic compounds have high melting and boiling points in general such as calcium oxide.

Answer:

The element is Calcium I guess.

Explanation:

Cause calcium oxide has high melting point and is soluble in water.

Answer:

Matter is any substance, if it is made up of only one kind of atom, then it is an element. Elements consists of atoms with the same weight and same number of protons in the nuclei.

Volume of 0.500 M C2H3OH and 0.500 M CH3O-Na that is required to prepare 0.100 L of pH = 5.00 buffer with a buffer strength reaction of 0.100 M = 31.6 mL of 0.500 M C2H3OH and 17.4 mL of 0.500 M CH3O-Na

To calculate the volume of 0.500 M C2H3OH and 0.500 M CH3O-Na required to prepare 0.100 L of pH = 5.00 buffer with a buffer strength of 0.100 M, we need to make use of the Henderson-Hasselbalch equation.Henderson-Hasselbalch equation is given as:  pH = pKa + log ([A-] / [HA])Where, pH is the pH of the buffer solution.

Pka is the negative logarithm of the acid dissociation constant ([H+][A-] / [HA]).[A-] is the concentration of the conjugate base.[HA] is the concentration of the weak acid.Let us calculate the concentration of the weak acid.  From the pH value, we can calculate the [H+].5.00 = 4.75 + log ([A-] / [HA])[A-] / [HA] = antilog (5.00 - 4.75) = antilog (0.25) = 1.78[Molar]Now, the buffer strength is 0.100 M.

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Answer:

315 kg

Explanation:

If the ore is 65% waste material, then the mass of the actual sodium in 1 tonne of ore is:

mass of sodium = 0.35 x 1000 kg = 350 kg

The process of electrolysis separates the sodium from the other components of the ore. The amount of sodium extracted will depend on the efficiency of the electrolysis process, which is typically measured by its Faraday efficiency.

The Faraday efficiency is the ratio of the amount of substance actually produced by electrolysis to the amount predicted by the theoretical stoichiometry of the reaction. For the electrolysis of sodium, the theoretical stoichiometry is:

2 Na+ + 2 e- → 2 Na

This reaction requires 2 moles of electrons (2 Faradays) to produce 2 moles of sodium.

If we assume a Faraday efficiency of 90%, this means that 90% of the theoretical amount of sodium is actually produced by electrolysis. Therefore, the mass of sodium extracted from 1 tonne of ore would be:

mass of sodium extracted = 0.9 x (2/2) x 350 kg = 315 kg

So, the company would extract 315 kg of sodium from 1 tonne of ore that is 65% waste material, assuming a Faraday efficiency of 90%.

Answer:

400°C

Explanation:

22,000 cal / (0.11 cal/g°C x 500 g) = 400°C

Answer:

400 C degree change

Explanation:

22 000 cal = 500 g * (C) * .11 cal / g-C

C = 22 000 / (500*.11)   = 400 C  degree change

Answer:

a free-falling object is an object that is falling under the sole influence of gravity. That is to say that any object that is moving and being acted upon only be the force of gravity is said to be "in a state of free fall." Such an object will experience a downward acceleration of 9.8 m/s/s.

In the case of the equilibrium reaction provided, if the concentration of Co(H2O)2+ is increased, the reaction will shift to the right in order to consume the excess Co(H2O)2+ and produce more CoCl2 and H2O.

Conversely, if the concentration of CoCl2 is increased, the reaction will shift to the left in order to consume the excess CoCl2 and produce more Co(H2O)2+ and Cl- ions.

According to Le Chatelier's principle, a change in concentration of one or more of the reactants or products of a chemical reaction at equilibrium will cause a shift in the equilibrium position to counteract the change and re-establish equilibrium.

Specifically, if the concentration of one of the reactants is increased, the reaction will shift in the direction that consumes that reactant in order to restore equilibrium.

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The correct chemical formula for the ionic compound formed when barium combines with nitrogen is (b) Ba3N2.

To determine the correct chemical formula for the ionic compound formed when barium (Ba) combines with nitrogen (N), we need to consider the charges of the ions involved.

Barium (Ba) is an alkaline earth metal located in Group 2 of the periodic table. It tends to lose two electrons to achieve a stable electron configuration, resulting in a 2+ charge (Ba2+).

Nitrogen (N), on the other hand, is a nonmetal located in Group 15 of the periodic table. It typically gains three electrons to achieve a stable electron configuration, resulting in a 3- charge (N3-).

When these ions combine, the charges must balance out to form a neutral compound. Since the 2+ charge of barium cancels out with the 3- charge of nitrogen, we need two barium ions (2x 2+ = 4+) to combine with three nitrogen ions (3x 3- = 9-) to achieve a neutral compound.

Therefore, the correct chemical formula for the ionic compound formed when barium combines with nitrogen is (b) Ba3N2.

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The statement which holds true for a neutral, aqueous solution at 25 °C are cane be written as:

The pH = 7.00

where, [ H + ] = [ OH − ]

And pOH = 7.00

The statement which is/are true for a neutral, aqueous solution regardless of temperature is;

[ H + ] = [ OH − ]

We must know that at standard temperature, 25°C, a neutral, aqueous solution has it's pH = pOH = 7. Additionally, the hydrogen ion concentration, [H+] is equal to its hydroxide ion concentration, [OH-]

The pH is slightly affected if there is any change in temperature as it decreases with increase in temperature.

In a neutral aqueous solution, there are always the same concentration of hydrogen ions,[H+] and hydroxide ions, [OH-] and hence, the solution is still neutral (even if its pH changes).

To summarize, the pH of a solution will decreases with increase in temperature and vice versa.

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Answer: a) Table Salt

good luck

Answer:

See Below

Explanation:

As this question is about the type of transformer, i am not going to discuss the detail the construction of it, rather the underlying principle. In practices transformer has two component namely primary and secondary. For an ideal transformer energy must conserved.

\(P_p=P_s\)

\(\\\Rightarrow V_{p}I_{p} & = & V_{s}I_{s}\qquad\text{as}\qquad \boxed{P=VI}\\\text{or},\frac{V_{p}}{V_{s}} & = & \frac{I_{s}}{I_{p}}\tag{1}\end{eqnarray}\)(1)

Where, \(V_p\), \(I_p\) are the voltage and current in the primary circuit and \(V_s\), \(I_s\) are that for secondary circuit respectively. If consider the number of turns of the coil in primary (\(N_p\)) and secondary circuit \((N_s)\) , then expression (1) further extends to

\(\frac{V_{p}}{V_{s}} = \frac{I_{s}}{I_{p}}=\frac{N_{p}}{N_{s}}\tag{2}\)       (2)

Equation (2) is the main equation for transformer.

Now consider

\(\frac{V_{p}}{V_{s}} = \frac{N_{p}}{N_{s}}\)

Case-1: If \(N_{p} > N_{s}\) then \(V_{s} < V_{p}\) . This the step-down transformer. Where the number of turns in the primary is greater than that of secondary.

Case-2:If \(N_{s} > N_{p}\)  then \(V_{s} > V_{p}\). This the step-up transformer. Where the number of turns in the primary is less than that of secondary.

A transformer is an electrical device that uses electromagnetic induction to transmit electrical energy between two or more circuits. This induction produces a force across the conductor, which is subsequently subjected to varying magnetic fields. In a power application, transformers typically reduce or enhance alternating current voltages.

This is where a step down transformer comes in, to increase or decrease an alternating current current. The primary voltage is larger than the secondary voltage in this sort of device. In a 220v application, a step down transformer will be required to use a 110v product. These transformers frequently rely on magnetic induction between coils. This is the component that transforms voltage and/or current levels. As a result, you'll have two (or more) insulated wire coils twisted around an iron core. When you add voltage to the primary (one of the coils), the core is magnetized and voltage is induced in the secondary (other coil). The voltage reduction is determined by the ratio of turns in the two sets of windings. As a result, if you have 200 turns on the main and 100 on the secondary, your ratio will be 2:1. The voltage ratio of a single transformer remains constant throughout all usage of that transformer.

To recap, a step down transformer transforms low current, high voltage electricity to high current, low voltage power. It is also possible to use a step down transformer as a reverse connection. To do this, a single phase step down transformer of 1 kva or greater is required.

The primary reason we may want a step down transformer in the first place is to conserve energy. When electrons move down a metal wire, they do not follow a straight, smooth route. They jostle around, wasting energy and heating up the wire. However, greater voltage and lower current consume less energy. This is why power plants deliver extremely high voltages down the line to your home, workplace, and so on.

Another reason for such high voltages is for applications that require them, like as industrial facilities. Their massive, powerful machinery may demand this voltage and do not need a step down transformer. These circumstances may necessitate the use of a step-up transformer, which may be accomplished, as previously stated, by utilizing a step-down in reverse. Because it is not the most efficient method, it is preferable to invest in a genuine step up transformer after researching your particular voltage needs. A step up transformer is one that raises the voltage from its main to secondary power source. In this sort of transformer, the secondary coil has more turns than the main coil, hence the induced secondary coil voltage is greater than the applied voltage on the primary coil.

When the relationship between voltage and turns in each coil is shown, it looks like this:

(Primary coil voltage minus secondary coil voltage) = (Primary coil turns minus secondary coil turns)

___________________

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78 milliliters of 11.5 m hydroiodic acid solution should be used to prepare 4.50 L of 0.200 M hi.

MaVa=MbVb

Now just substitute the values

11.5*x=4.50*0.200

x=0.078260 liters

1 liter is equal to 1000 ml so  0.078260 is multiplyed with 1000

then , x=78 mL.

An aqueous solution of hydrogen iodide is hydroiodic acid. It is a potent acid that totally ionizes in aqueous solutions. It has no color. Concentrated solutions typically range in HI from 48% to 57%. Strong acids are those that entirely separate out in aqueous solutions. For instance, sulphuric acid H 2 SO 4 and hydrochloric acid HCl. Because it totally dissociates in water, the acid that is being used in this instance, hydroiodic acid (HI), is a powerful acid.

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Answer:

yes the answer is c

Explanation:

Answer: When carbon(C) combines with chlorine(Cl), carbon forms single covalent bond with each chlorine atom. The valence shell configuration of uncombined C atom is 2s2 2px1 2py1 .

During combination hybridisation takes place, an electron shifts from 2s to empty 2pz . These four orbitals merge to form four hybrid orbitals. Each hybrid orbital has 1 electron which pairs up with a valence electron of Cl atom to form a covalent bond. Thus the four hybrid orbitals form four single covalent bonds with four chlorine atoms. This completes each atom's octet and gives them noble gas configuration.

When two atoms of different elements combine they always have electronegativity(EN) difference due to which the shared pair of electrons is more closer to more electronegative atom. This gives the bonds some ionic character. So no bond between two atoms of different elements can be purely covalent.

Explanation:

Answer:

Not exactly sure what you mean by this, but "The average density of an object equals its total mass divided by its total volume."

Explanation:

Hope this helps!

Answer:

It is the minerals total mass divided by the total volume

Explanation:

It is how hard or soft the rock is and if it floats or sinks you can test that in  a cup of water as well

Answer:

only the atoms present in the reactants can end up in the products.

Explanation:

The correct option is A. The hydronium ion concentration in the aqueous solution with a pOH of 4.33 at 25°C is approximately 2.1 × 10^-10 M.

To calculate the hydronium ion concentration in an aqueous solution with a pOH of 4.33 at 25°C,  we need to use the relationship between pH, pOH, and the hydronium ion concentration in an aqueous solution:

pH + pOH = 14

Now, we can calculate the pH:

pH = 14 - pOH
pH = 14 - 4.33
pH = 9.67

Next, we can find the hydronium ion concentration using the pH value:

[H₃O+] = 10^(-pH)

Plugging in the pH value:

[H₃O+] = 10^(-9.67)
[H₃O+] ≈ 2.1 × 10^-10 M

So, the hydronium ion concentration in the aqueous solution with a pOH of 4.33 at 25°C is approximately 2.1 × 10^-10 M (option A).

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The concentration of aqueous \(Fe^3+\) in equilibrium with solid \(Fe(OH)_3\) is approximately \(3.16 x 10^{-36\) M, and the solubility of \(Fe(OH)_3\) is also approximately 3.16 x \(10^{-36\) M.

The solubility product constant (Ksp) expression for Fe(OH)3 can be written as follows:

Ksp =\([Fe^3+][OH^-]^3\)

Since \(Fe(OH)_3\) is a sparingly soluble compound, we can assume that the concentration of \(OH^-\) ions in the solution is negligible compared to the concentration of \(H3O^+\)ions. Thus, we can consider the solution to be acidic and calculate the concentration of \(Fe^3+\) ions using the pH of the solution.

Given:

pH = 4.51

Ksp for \(Fe(OH)_3\) = 3 x 10^-39

Using the relationship between pH and pOH (pOH = 14 - pH), we can calculate the pOH of the solution:

pOH = 14 - 4.51 = 9.49

Since the solution is acidic, the concentration of H3O+ ions is equal to 10^(-pH):

[\(H3O^+\)] = \(10^{(-4.51)\) M

Now, assuming that Fe(OH)3 is in equilibrium with \(Fe^3+\) ions, we can equate the concentration of \(Fe^3+\) to [\(H3O^+\)]:

[\(Fe^3+\)] = [H3O+] = 10^(-4.51) M

Since the concentration of \(Fe^3+\) ions is equal to the solubility of \(Fe(OH)_3\), the solubility of \(Fe(OH)_3\) is approximately 3.16 x 10^-36 M.

Therefore, the concentration of aqueous \(Fe^3+\)in equilibrium with solid \(Fe(OH)_3\) is approximately 3.16 x \(10^{-36\) M, and the solubility of\(Fe(OH)_3\)is also approximately 3.16 x \(10^{-36\) M.

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The soda in a fridge has more thermal energy than the soda on the kitchen table.

Thermal energy is the total energy possessed by an object due to the motion of its particles. It is directly related to the temperature of the object. When a soda is placed in a fridge, it is exposed to a lower temperature environment. The fridge actively removes heat from the air inside, creating a cooler environment. As a result, the soda's temperature decreases. The decrease in temperature corresponds to a decrease in the average kinetic energy of the soda's particles, which directly affects its thermal energy.

On the other hand, a soda on the kitchen table is exposed to the surrounding room temperature. While the room temperature may vary depending on the location and climate, it is generally higher than the temperature inside a fridge. Consequently, the soda on the kitchen table has a higher temperature, which corresponds to a higher average kinetic energy of its particles and thus a higher thermal energy.

In summary, the soda in a fridge has more thermal energy than the soda on the kitchen table due to the lower temperature environment it is exposed to. The lower temperature corresponds to a decrease in the average kinetic energy of its particles and, consequently, a lower overall thermal energy.

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Answer:

option B is the correct answer

The molar equilibrium concentration of uncomplexed Ag+ in a solution composed of 1.1 mol Ag(CN)2^1 dissolved in 1.00 L of 0.47 M NaCN is 4.1 × 10⁻²³ M.

The molar equilibrium concentration of uncomplexed Ag+ in a solution composed of 1.1 mol Ag(CN)2^1 dissolved in 1.00 L of 0.47 M NaCN is 4.1 × 10⁻²³ M.Ag(CN)2^- ⇔ 2CN- + Ag2+

Now, using ICE table to find the value of [Ag2+] let's start the calculations;

Ag(CN)2^- ⇔ 2CN- + Ag2+

Initial: 1.1 M 2 × 1.1 M 0

Change: - x - 2 x x

Equilibrium: 1.1 - x 2.2 x x

Kf = (Ag2+) (CN-)²/Ksp (AgCN)²4.5 × 10¹⁰ = x (2x)²/(1.1 - x) × (0.47)²

Simplifying, we get;x = 4.1 × 10⁻²³ M (Approx)

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The balanced chemical equation for incomplete combustion of methane,2 CH₄+ 3 O₂\(\rightarrow\) 2 CO + 4 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 .

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Explanation: