Sodium sulfate is added to a solution mixture containing potassium nitrate and barium nitrate. After centrifugation, which aqueous ions are present in the supernatant

Atmospheric pressure is the weight of the atmosphere above a certain point on the Earth's surface, whereas ambient pressure is the pressure of the surroundings. A comparison table between atmospheric pressure and ambient pressure can be drawn as follows:

Characteristics

Atmospheric Pressure

Ambient Pressure

Definition

The weight of the atmosphere above a certain point on the Earth's surface

The pressure of the surroundings

Measurement

In kPa or atm unitsIn kPa or atm units

Altitude

Above sea level

Not related to altitude

Units of measurement

In kPa or atm unitsIn kPa or atm units

EquationP = ρghP = F/A = Force/Area

Examples

Normal atmospheric pressure is 101.325 kPa

Normal ambient pressure is 101.325 kPa

Applications

Meteorology, weather forecasting, aviation, space exploration, etc.

Space exploration, pressurized chambers, HVAC systems, etc.

In summary, atmospheric pressure is the weight of the air molecules and ambient pressure is the pressure of the surroundings. These are both measured in kPa or atm units and are used in various fields such as meteorology, aviation, and space exploration.

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Answer:

its true

Explanation:

Cause i know because i just have notes a lot and i am in 10th grade U w U

The smallest possible integer coefficients for the balanced equation are 1, 1, 1, 1.

The balanced molecular equation for the reaction:

carbon monoxide (g) + water (l) → carbon dioxide (g) + hydrogen (g)

can be obtained by following the steps of balancing the atoms in the equation.

First, we count the number of atoms of each element on both sides of the equation.

On the left side, we have:

1 carbon atom (C)

1 oxygen atom (O)

1 hydrogen atom (H)

On the right side, we have:

1 carbon atom (C)

3 oxygen atoms (O)

2 hydrogen atoms (H)

To balance the equation, we need to add coefficients to each molecule on the left side and right side of the equation to make the number of atoms of each element equal on both sides.

The balanced equation is:

CO(g) + H₂O(l) → CO₂(g) + H₂(g)

Therefore, the coefficients for the balanced equation are:

CO: 1

H₂O: 1

CO₂: 1

H₂: 1

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The highest energy subshell occupied by a Titanium ion with +2 charge (Ti⁺²) will be 4s.

The element Titanium has an Atomic Number of 22. This means that Titanium has 22 electrons bound by the nucleus, which are assigned to various orbitals. The order of the filling of the orbitals, which is the same for all elements, goes as follows for Titanium.

Ti₂₂ = 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d²

As per the order, the orbitals are written in the order of increasing energy, which can be checked by the (n + l) rule.

In the question, Ti⁺² ion is mentioned, where two electrons have been removed. Since the electrons are always removed from the outermost orbital, the electronic configuration of the ion will be:

Ti⁺² = 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d⁰

As seen, the electrons are removed from the outermost orbital. Thus, after removal, the highest energy orbital would be 4s.

(Image depicting Electronic Configuration for reference)

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Answer:

a

Explanation:

It's a duh

Answer:

B. The reactants are compounds that react to form new compounds (the products).

Explanation:

yessirski what he said is what im doing. Thanks, guys! #BrainlyPremium

The right response is A. To move electrons from the p-type semiconductor to the n-type semiconductor, light beaming on the system must have sufficient energy.

Semiconductors are substances that exhibit conductivity intermediate between that of conductors (often metals) and that of insulators or non-conductors (such as ceramics). Semiconductors can be pure elements like germanium or silicon or compounds like gallium arsenide.

The correct answer is A. Light shining on the system must have enough energy to set electrons in motion from the p-type to the n-type semiconductor.

When light shines on the solar cell, it excites electrons in the p-type semiconductor, allowing them to move across the interface to the n-type semiconductor. This creates a flow of electrons, which can be harnessed to generate an electric current. This process is known as the photovoltaic effect.

Option B is incorrect because an external battery is not required to generate an electric current in a solar cell. Option C is also incorrect because the electrons move from the p-type to the n-type semiconductor, not the other way around. Option D is also incorrect because oxidation does not play a role in the functioning of a solar cell.

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Answer:

Covalent

Explanation:

In the carbon tetrachloride molecule, four chlorine atoms are positioned symmetrically as corners in a tetrahedral configuration joined to a central carbon atom by single covalent bonds

Answer:

Carbon tetrachloride (CCl4) is ✔ covalent.

Answers to assignment question:

What properties would you expect for CCl4? Select all that apply.

It is likely a gas or liquid at room temperature.

It is likely soluble in water.

It will likely light up a bulb in a conductivity apparatus.

It will likely have a high melting point.

Calcium oxide (CaO) is ✔ ionic.

What properties would you expect for CaO? Select all that apply.

It is likely a gas or liquid at room temperature.

It is likely soluble in water.

It will likely light up a bulb in a conductivity apparatus.

It will likely have a high melting point.

Explanation:

all correct on edge! :D

The overall enthalpy of the reaction is -131.3 kJ.

To calculate the overall enthalpy of the reaction, you need to manipulate the given equations and combine them in a way that cancels out the common substances. Let's analyze each equation:

1: C (s) + O₂ (g) -> CO₂ (g)   ΔH₁ = -393.5 kJ

2: 2CO (g) + O₂ (g) -> 2CO₂ (g)   ΔH₂ = -566.0 kJ

3: 2H₂O (g) -> 2H₂ (g) + O₂ (g)   ΔH₃ = 483.6 kJ

To obtain the overall reaction: C (s) + H₂O (g) -> CO (g) + H₂(g), we can manipulate the equations as follows:

1: Reverse equation 1 to obtain: CO₂ (g) -> C (s) + O₂ (g)   ΔH₁' = +393.5 kJ

2: Halve equation 2 to obtain: CO (g) + 1/2 O₂ (g) -> CO₂ (g)   ΔH₂' = -283.0 kJ

3: Reverse and halve equation 3 to obtain: H₂ (g) + 1/2 O₂ (g) -> H₂O (g)   ΔH₃' = -241.8 kJ

Now, we can sum up the manipulated equations to obtain the overall reaction:

CO₂ (g) + CO (g) + H₂ (g) + 1/2 O₂ (g) -> C (s) + 2CO₂ (g) + H₂O (g) + 1/2 O₂ (g)

To calculate the overall enthalpy change (ΔHrxn), we sum up the enthalpy changes of the manipulated equations:

ΔHrxn = ΔH₁' + ΔH₂' + ΔH₃'

      = 393.5 kJ + (-283.0 kJ) + (-241.8 kJ)

      = -131.3 kJ

Therefore, the overall enthalpy of the reaction is -131.3 kJ.

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The percentage dissociation is 0.97% and the hydrogen ion concentration is 1.93 x 10^-3 mol/dm^3.

we need to use the equation:

Ka = [H^+][A^-] / [HA]

where Ka is the equilibrium constant, [H^+] is the hydrogen ion concentration, [A^-] is the concentration of the dissociated form of the acid (acetate ion), and [HA] is the concentration of the undissociated form of the acid (ethanoic acid).

We know the concentration of ethanoic acid, [HA] = 0.2 mol/dm^3, and the value of the equilibrium constant, Ka = 1.85 x 10^-5 mol/dm^3.

Using the equation:

Ka = [H^+][A^-] / [HA]

1.85 x 10^-5 = [H^+][A^-] / 0.2

[H^+][A^-] = 1.85 x 10^-5 * 0.2

[H^+][A^-] = 3.7 x 10^-6 mol^2/dm^6

Since the concentration of the acetate ion is equal to the concentration of the hydrogen ion, [A^-] = [H^+].

So,

[H^+]^2 = 3.7 x 10^-6 mol^2/dm^6

[H^+] = sqrt(3.7 x 10^-6) = 1.93 x 10^-3 mol/dm^3

The hydrogen ion concentration is 1.93 x 10^-3 mol/dm^3.

To find the percentage dissociation, we divide the concentration of the acetate ion by the initial concentration of ethanoic acid and multiply by 100:

Percentage dissociation = ([A^-] / [HA]) * 100

Percentage dissociation = (1.93 x 10^-3 / 0.2) * 100 = 0.97%.

Therefore, The percentage dissociation is 0.97% and the hydrogen ion concentration is 1.93 x 10^-3 mol/dm^3.

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The following could you add to increase the solubility of CaBr2 are NaNO3 and KOH. Option D and Option E are correct.

Solubility refers to the degree to which a substance is dissolved in a solvent to create a homogeneous solution. The solubility of a solute can be influenced by several variables, including temperature, pressure, and the chemical properties of the solute and solvent.

When an ionic compound, such as calcium bromide (CaBr2), is added to water, the solubility of the compound determines the degree to which it will dissolve.The solubility of calcium bromide (CaBr2) in water is determined by the type and amount of other substances that are present in the water. If you want to increase the solubility of calcium bromide, you can add a substance that is soluble in water and that can be ionized.

When the added substance dissolves in water, it ionizes and generates ions that can interact with the calcium and bromide ions in CaBr2 and increase the solubility. Sodium nitrate (NaNO3) and potassium hydroxide (KOH) are two substances that can increase the solubility of calcium bromide.

Therefore, the correct answer is D. NaNO3. and E. KOH.

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Answer:

Hey there :))

Speed and Velocity are related in a lot of ways distance and displacement are. Speed is a scalar and velocity is a vector. They both represent a way to measure the change in position of an object relative to time.

Answer: A. The variable c

============================================

Explanation:

Q = heat transferred

m = mass

c = specific heat

\(\Delta T\) = delta T = change in temperature

Phosphorus-32 (32P) is a radioactive isotope of phosphorus. It has a mass number of 32, which means that the sum of the protons and neutrons in its nucleus is 32. Phosphorus has an atomic number of 15, which tells us that it has 15 protons in its nucleus.

To determine the number of neutrons in the nucleus of a phosphorus-32 atom, we subtract the atomic number from the mass number:

Number of neutrons = Mass number - Atomic number
Number of neutrons = 32 - 15
Number of neutrons = 17

Therefore, there are 17 neutrons present in the nucleus of a phosphorus-32 (32P) atom. This is important to know because the number of neutrons in an atom affects its stability and reactivity, as well as its isotopic properties. Phosphorus-32, for example, is used in a variety of biological and medical applications because of its ability to emit beta radiation, which can be used to study cellular processes and treat certain medical conditions.

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Answer:

5.399772727e22 atoms/particles or 5.39 x 10^22 atoms/particles

Explanation:

so to convert you’re going to convert grams to moles and moles to atoms/particles:

grams to moles:

23g CF4 x 1 mol

———— = 0.26136 mol

88g (molar mass of CF4)

moles to atoms/particles:

[2.066 • 10^23 is avogadro's number and is always used to convert to atoms/particles]

0.26136 mol x 2.066 • 10^23

———————

1 mol

this gives you 5.399772727e22 atoms/particles

so 5.399772727e22 atoms/particles or 5.39 x 10^22 atoms/particles for scientific notation

hope this helps :)

When the system reaches thermal equilibrium, the temperature will be closest to 20°C.

To determine the final temperature when the iron pellet is dropped into water, we can use the principle of heat transfer. The heat lost by the iron pellet will be equal to the heat gained by the water.

The heat lost by the iron pellet can be calculated using the equation:

Q_iron = m_iron * c_iron * ΔT_iron

where m_iron is the mass of the iron pellet, c_iron is the specific heat capacity of iron, and ΔT_iron is the change in temperature of the iron pellet.

The heat gained by the water can be calculated using the equation:

Q_water = m_water * c_water * ΔT_water

where m_water is the mass of the water, c_water is the specific heat capacity of water, and ΔT_water is the change in temperature of the water.

Since the total heat lost by the iron pellet is equal to the total heat gained by the water, we can set up the equation:

Q_iron = Q_water

m_iron * c_iron * ΔT_iron = m_water * c_water * ΔT_water

Substituting the given values:

(50 g) * (specific heat capacity of iron) * (final temperature - 200°C) = (50 g) * (specific heat capacity of water) * (final temperature - 20°C)

Since the specific heat capacity of water is approximately 10 times that of iron, we can assume that the specific heat capacity of iron is negligible compared to that of water. Therefore, we can approximate the equation as:

50 * (final temperature - 200) ≈ 500 * (final temperature - 20)

Simplifying the equation:

final temperature - 200 ≈ 10 * (final temperature - 20)

final temperature - 200 ≈ 10 * final temperature - 200

200 - 20 ≈ 10 * final temperature - final temperature

180 ≈ 9 * final temperature

final temperature ≈ 180 / 9

final temperature ≈ 20°C

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3 Ca3 (PO4)2 + 4 CaO

So we can see that there are 3 Ca3 (Ca3, Ca3, Ca3), which means you multiply the subscript by the coefficient, meaning 9 Ca. Then we see (PO4)2, which means that there are two PO4 (PO4, PO4) so we multiply the subscript 2 by the subscript 4 on O to equal 8 O, and we multiply the subscript 2 by the subscript 1 on P (the 1 is not written) to equal 2 P.

So far we have 9 Ca, 8 O, and 2 P.

One last term, 4 CaO (means CaO, CaO, CaO, CaO) which translates to 4 Ca and 4 O.

Add them all together and you get (9+4=13) 13 Ca, (8+4=12) 12 O, and 2 P

Answer:

Chloroplasts?

Explanation:

We know that the elements can be classified into families and the families into which the elements can be classified would depend on the reactivity of the elements and the number of electrons in the valence shell of the atoms of the elements.

We can see that the elements that are in family 1, A, E,B all form the kind of hydrides that have the formula AH. This implies that they are univalent and the there are non metallic.

Family 2 would comprise of the elements C, D F. these are the elements that form the compounds CH3 hence they must be trivalent nonmetals.

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Answer:

There was no reaction

Explanation:

1.Did a reaction occur? Explain your answer. If a reaction occurred, also provide a possible chemical equation describing the reaction.

When a reaction occurs, the initial moles of each species decreases to produce a determined product. If the initial moles of reactant = final moles there was no reaction:

Initial moles A:

0.100L * (1.0mol / L) = 0.100 moles A

Final moles A:

0.200L * (0.5mol / L) = 0.100 moles A

Initial moles B:

0.100L * (1.0mol / L) = 0.100 moles B

Final moles B:

0.200L * (0.5mol / L) = 0.100 moles B

As the moles in the beginning = Moles after the mixture

There was no reaction

Answer:

-Over time, the rates of the forward and reverse reactions equalize.

-Initially, the concentration of products is low, so the rate of the reverse reaction is also low.

Explanation:

A chemical reaction is said to be reversible when the reactants forms the products, which in turn reacts together again to give rise to the reactants. In a reversible reaction, the formation of products from reactants occurs simultaneously with the reformation of the reactants from the products. For example:

The reversible reaction: A + B ⇆ C + D means;

A + B → C + D and C + D → A + B

The rate at which both forward and reverse reactions are taking place in closed system may be initially different but with time, it gets equal to form an equilibrium reaction. However, at first, only the rate of the forward reaction proceeds because the concentration of the product is low. Hence, the rate of reaction of the reverse reaction (product to reactants) is low as well.

In the reversible reaction above, the rate of the reverse reaction (C + D → A + B) will turn out low initially because the concentration of the products (C and D) are low. With time, the rates of the forward and reverse reaction becomes equal to form an EQUILIBRIUM or STABLE reaction.

The pressure of 0.0158 mole of methane in a 0.275 L flask at 27 °C is approximately 4.42 atm.

To calculate the pressure of the methane in the flask, we can use the ideal gas law equation:

PV = nRT

Where:

P = Pressure (in atm)

V = Volume (in liters)

n = Number of moles

R = Ideal gas constant (0.0821 L·atm/(mol·K))

T = Temperature (in Kelvin)

First, let's convert the temperature from Celsius to Kelvin:

T(K) = T(°C) + 273.15

T(K) = 27 + 273.15

T(K) = 300.15 K

Now we can substitute the given values into the ideal gas law equation:

P * 0.275 = 0.0158 * 0.0821 * 300.15

Solving for P:

P = (0.0158 * 0.0821 * 300.15) / 0.275

P ≈ 4.42 atm

Therefore, the pressure of 0.0158 mole of methane in a 0.275 L flask at 27 °C is approximately 4.42 atm.

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The elements are arranged in periods and groups. They are also arranged by the way they react to other chemicals, or the chemicals that are mixed in the element to make it.

The evidence that explains how the structure of each element is different from another is that the elements are arranged in periods and groups.

The periodic table refers to the tabular display of the chemical elements. It should be noted that the periodic table is arranged based on the increasing atomic number of the elements.

The elements that are in the periodic table are also arranged by the way they react to other chemicals. Therefore, the elements that are in a particular group typically have the same characteristics.

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Answer:

D and A

Explanation:

While protons or electrons can be influenced by other charged particles, neutrons are not.

and

Neutrons are held tightly together with protons in the nucleus, so scientists could not observe the behavior of neutrons independently.

Answer:

B

Explanation:

because HCl donates a proton to water. Therefore, HCl is an acid. H2O accepts a proton from HCl. Therefore, H2O is a base.