Predict the nature of the products of the reaction of Fr with chlorine.
Express your answer as a chemical equation.
Expert Answer

Answer:

347.4 (19.3 mole)

Explanation:

CH4 + 2O2 = CO2 + 2H2O

1(mole) - 9.65(mole)

2(mole) - x ⇒x = 9.65*2=19.3

m=n*M ⇒ m= 19.3*(1*2+16)= 19.3*18=347.4(g)

Answer: D

Explanation:

Answer:

gamma rays

Explanation:

gamma Ray's have the highest frequency

The volume of the irregular solid from the image that have been shown is  12 mL

To obtain the volume of the irregular solid;

a. Measure the initial volume of water in the cylinder.

b. Carefully lower the irregular solid into the water, ensuring it is fully submerged without trapping any air bubbles.

c. Record the new volume of water in the cylinder.

d. The volume of the irregular solid is equal to the difference between the final and initial water volumes.

The volume is;

32 mL - 20 mL = 12 mL

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The statement that best describes the cell condition supporting Na+ sequestration in the vacuole is option B: Na+ sequestration can occur if the concentration of protons (H+) in the cytoplasm is less than the concentration of protons (H+) in the vacuole.

Option B accurately describes the condition that enables Na+ sequestration in the vacuole. In plant cells, the vacuole plays a crucial role in ion homeostasis by actively transporting ions such as Na+ into its lumen, maintaining a lower concentration of Na+ in the cytoplasm compared to the vacuole.

This sequestration process relies on proton pumps present in the vacuolar membrane, which actively transport protons (H+) from the cytoplasm into the vacuole, creating an electrochemical gradient. The higher concentration of protons (H+) in the vacuole creates an electrochemical potential that facilitates the uptake of Na+ ions.

By maintaining a lower concentration of protons (H+) in the cytoplasm relative to the vacuole, the cell can drive Na+ ions into the vacuole against their concentration gradient, effectively sequestering them and preventing their accumulation in the cytoplasm.

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1) When a solution of AgNO3 and NaCl  are mixed, a double replacement reaction occurs, resulting in the formation of AgCl and NaNO3.

The solubility product constant (Ksp) for AgCl is given as 1.77 ×\(10^{-10\). Since Ksp is very small, it indicates that AgCl has low solubility in water. When AgNO3 and NaCl are mixed, AgCl will precipitate out of the solution until it reaches saturation, forming a saturated solution of AgCl.

2) To calculate the pH of the buffer solution, we need to consider the dissociation of pyruvic acid and the conjugate base, sodium pyruvate (CH3COCOO⁻).

CH3COCOOH ⇌ CH3COCOO⁻ + H⁺

The Ka value for pyruvic acid is given as 4.1 × \(10^{-3\).

Since the concentrations of pyruvic acid and sodium pyruvate are given, we can assume that the initial concentration of H⁺ is negligible compared to the concentrations of pyruvic acid and sodium pyruvate.

Using the Henderson-Hasselbalch equation:

pH = pKa + log([A⁻]/[HA])

Substituting the values into the equation:

pH = -log(4.1×10–3) + log(0.0507/0.0527)

pH = -log(4.1×10–3) + log(0.0507) - log(0.0527)

pH = -(-2.39) + (-1.293) - (-1.276)

pH = 2.39 + 1.293 + 1.276

pH ≈ 4.96

Therefore, the pH of the buffer solution is approximately 4.96.

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The balanced equation of FeCI2+Na0H Fe(0H)3+NaCI is 2FeCl2 + 2NaOH → 2Fe(OH)3 + 2NaCl.

To balance the chemical equation FeCl2 + NaOH → Fe(OH)3 + NaCl by trial and error, we need to ensure that the same number of each type of atom is present on both the reactant and product side of the equation.

First, we start with the iron atom since it appears only once on each side of the equation. To balance it, we need to add a coefficient of 2 in front of NaOH to get:

FeCl2 + 2NaOH → Fe(OH)3 + NaCl

Next, we balance the chlorine atoms by adding a coefficient of 2 in front of FeCl2:

2FeCl2 + 2NaOH → Fe(OH)3 + 2NaCl

Finally, we balance the hydrogen and oxygen atoms by adding a coefficient of 3 in front of Fe(OH)3:

2FeCl2 + 2NaOH → 2Fe(OH)3 + 2NaCl

The equation is now balanced with equal numbers of atoms on both the reactant and product sides.

Balancing a chemical equation involves adjusting the coefficients of the reactants and products to ensure that the same number of each type of atom is present on both sides of the equation. We start by looking at the different elements involved and choose one to balance first. In this case, we began with iron since it appears only once on each side of the equation. We then proceeded to balance the other elements, working through them one by one until all were balanced. It's important to note that balancing equations requires some trial and error, but with practice, it becomes easier to quickly identify the necessary coefficients to balance a given equation.

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Answer:

reactants : before arrow sign

: CH4 and O2

product : after arrow sign

: CO2 and H2O

the answer is the second option

Answer:

4.2 moles Cl2 ( 2 Cl / 1 Cl2 ) = 8.4 mol Cl atoms.

Explanation:

Hope this helps.

Answer:

36 oxygen atoms

Explanation:

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

Compound => 4Al₂(CO₃)₃

Number of Oxygen atom in the compound =?

The number of oxygen atom in the above compound can be obtained as follow:

4Al₂(CO₃)₃

Al = 4 × 2 = 8 atoms

C = 4 × 3 × 1 = 12 atoms

O = 4 × 3 × 3 = 36 atoms

From the simple illustration made above, there are 36 oxygen atoms in the compound.

The concentration after 3.00 hours is 2.88 m.

To solve this problem, we will use the formula for the rate of a first-order reaction:

rate = k[A]

where k is the rate constant and [A] is the concentration of the reactant. We are given k = 0.02911(m/hr) and [A] = 3.13 m. We want to find the concentration after 3.00 hours, which we'll call [A'].

We can use the integrated rate law for a first-order reaction:

ln[A'] = -kt + ln[A]

where ln is the natural logarithm. Plugging in the given values, we get:

ln[A'] = -0.02911(m/hr) * 3.00 hr + ln[3.13 m]

Simplifying, we get:

ln[A'] = -0.08733 + 1.147

ln[A'] = 1.059

To solve for [A'], we'll take the inverse natural logarithm of both sides:

[A'] = e^(1.059)

[A'] = 2.884

Rounding to three significant figures, we get:

[A'] = 2.88 m

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The appropriate definition that applies to the compound in red (F-(aq)) is Bronsted-Lowry base.

Based on the given chemical equation F-(aq) + HSO4-(aq) → HF(aq) + SO42-(aq), the compound in red is F-(aq) (fluoride ion).

In this context, F-(aq) acts as a base by accepting a proton (H+) from the HSO4-(aq) ion, forming HF(aq) and SO42-(aq).

Therefore, the appropriate definition that applies to the compound in red (F-(aq)) is Bronsted-Lowry base.

In the given chemical equation F-(aq) + HSO4-(aq) → HF(aq) + SO42-(aq), the compound highlighted in red is F-(aq), which represents the fluoride ion.

In this specific context, F-(aq) demonstrates its characteristics as a base by accepting a proton (H+) from the HSO4-(aq) ion. This proton transfer reaction results in the formation of HF(aq) and SO42-(aq).

Therefore, based on its behavior in the equation, the appropriate definition for the compound in question, F-(aq), is that of a Bronsted-Lowry base.

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Exothermic reactions release more energy when bonds are created in the products than when they are broken in the reactants.

The amount of energy required to break the bonds between the reactants and the amount of energy released when new bonds are formed must be compared to determine whether a reaction is exothermic or endothermic.

Exothermic chemical reactions are those that release energy. When bonds are broken in the reactants during exothermic reactions, more energy is released when bonds are formed in the products. Endothermic chemical processes are those that either utilize or absorb energy.

In this case, the reaction is exothermic and the enthalpy will be negative. This is because exothermic reactions release more energy than they absorb. Imagine that this represents a certain quantity of heat that is being added to (or taken away from) the process. Enthalpy will be positive if a reaction is endothermic, meaning it absorbs or uses more energy than it does.

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\(FeCl_3\) (ferric chloride) reacts with salicylic acid to produce a positive result. This reaction occurs because \(FeCl_3\) forms a colored complex with the phenolic hydroxyl group (-OH) present in salicylic acid.

1. Mix a small amount of \(FeCl_3\) with the test substance (in this case, salicylic acid).
2. Observe the color change upon mixing.
If a positive result is obtained (usually a color change to purple or violet), this indicates the presence of salicylic acid in the test substance. Based on the observed results, you can conclude that if a color change occurs, your product contains salicylic acid and has some degree of purity. However, the intensity of the color change may not provide an accurate measurement of the product's overall purity. Additional tests, such as melting point analysis or spectroscopy, are needed to further determine the purity of your product.

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Answer:

d

Explanation:

the more movement the more energy

The mass of O₂ produced from 31.2 g H₂O(g) can be calculated using stoichiometry, and the answer is 17.6 g.


The given equation shows that 2 moles of water decompose to give 1 mole of oxygen gas. To find the mass of oxygen produced, we need to convert the given mass of water to moles, using its molar mass. The molar mass of water is 18 g/mol (2 x 1.01 g/mol for hydrogen + 16.00 g/mol for oxygen).  

So, 31.2 g of water is equivalent to 31.2/18 = 1.733 moles of water. From the equation, we see that 1 mole of oxygen is produced for every 2 moles of water decomposed. Therefore, the number of moles of oxygen produced is 1.733/2 = 0.8665 moles.  

Finally, we convert this number of moles to mass using the molar mass of oxygen, which is 32.00 g/mol. So, 0.8665 moles of oxygen is equivalent to 0.8665 x 32.00 = 27.73 g of oxygen. However, we need to consider significant figures and round off to the correct number of decimal places. Hence, the mass of O₂ produced is 17.6 g (rounded to two significant figures).

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Russia is a federation with a semi-presidential political system. The President is the head of state while the Prime Minister is the head of government. The Federal Assembly is a bicameral legislature that is made up of the State Duma (lower house) and the Federation Council (upper house).

The political system in Russia and the United States are different. In the US, it is a presidential system where the President is both the head of state and government, while in Russia, the President is the head of state while the Prime Minister is the head of government.

In the US, the Congress is made up of the Senate (upper house) and the House of Representatives (lower house) while in Russia, the Federal Assembly is made up of the State Duma (lower house) and the Federation Council (upper house).

The key distinguishing features between the political systems in Russia and the US include the role of the President, the structure of the legislature, and the nature of the judiciary. In Russia, the President has a lot of power and is able to appoint the Prime Minister and other members of the executive branch.

The judiciary is also less independent compared to that of the US. On the other hand, the US has a more balanced system of power between the three branches of government, with the judiciary being independent of the executive and legislative branches.

The strengths of the political system in Russia include a strong centralized government that is able to make quick decisions and a strong military. However, the lack of political pluralism and the weak judiciary system are key weaknesses of the system.

The US political system has a strong commitment to individual rights and democratic principles. However, the system is often characterized by gridlock and polarization between political parties, leading to slow decision-making and a lack of progress on important issues.

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The relationship between pH, pOH, and the concentration of hydroxide ions in a solution is given by:

pH + pOH = 14

If a solution has a pOH of 7.39, we can find its pH by subtracting the pOH from 14:

pH = 14 - pOH

pH = 14 - 7.39

pH = 6.61

Therefore, the solution has a pH of 6.61.

The pH scale, which describes the connection between pH, pOH, and the quantity of hydroxide ions, is an essential concept in chemistry. A pH of 7 is regarded as neutral, whereas values below 7 are acidic and those over 7 are basic (also called alkaline).

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When we have an acid-base reaction, the acid will be that substance that donates protons, in the form of H+ ions. The base will be the one that accepts the H+ ions. Now, the base that accepts the protons becomes a potential proton donor, thus becoming a conjugate acid. This is the case with H3O+.

H2O accepts H+ ions, so it is a base and when it becomes H3O+ it becomes a potential H+ proton donor, that is, a conjugate acid.

so, the answer will be B. Conjugate acid

According to  concept of thermal energy,  two statements which are accurate about insulated container are  that  heat lost by water will be absorbed by the object. Temperature of  water and object will approach  same value.

Thermal energy is defined as a type of energy which is contained within a system which is responsible for temperature rise.Heat is a type of thermal energy.It is concerned with the first law of thermodynamics.

Thermal energy arises from friction and drag.It includes the internal energy or enthalpy of a body of matter and radiation.It is related to internal energy and heat .It arises when a substance whose molecules or atoms are vibrating faster.

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Answer:

answers

A -- central

B--- peripheral

Explanation:

hope this helps!

Answer:

A -- centralB--- peripheral

Explanation:

Answer:

–253.5 °C

Explanation:

We'll begin by calculating the number of mole in 6 g of CO₂. This can be obtained as follow:

Molar mass of CO₂ = 12 + (2×16)

= 12 + 32

= 44 g/mol

Mass of CO₂ = 6 g

Mole of CO₂ =.?

Mole = mass / molar mass

Mole of CO₂ = 6 / 44

Mole of CO₂ = 0.136 mole

Next, we shall convert 225 mL to L.

1000 mL = 1 L

Therefore,

225 mL = 225 mL × 1 L / 1000

225 mL = 0.225 L

Next, we shall determine the temperature of the gas. This can be obtained as follow:

Pressure (P) = 0.855 atm

Volume (V) = 0.225 L

Number of mole (n) = 0.136 mole

Gas constant (R) = 0.0821 atm.L/Kmol

Temperature (T) =?

PV =nRT

0.855 × 0.255 = 0.136 × 0.0821 × T

0.218025 = 0.0111656 × T

Divide both side by 0.0111656

T = 0.218025 / 0.0111656

T = 19.5 K

Finally, we shall convert 19.5 K to degree celsius (°C). This can be obtained as follow:

T(°C) = T(K) – 273

T(K) = 19.5 K

T(°C) = 19.5 – 273

T(°C) = –253.5 °C

Therefore, the temperature of the gas is –253.5 °C

The chemical equation for the reaction between liquid nonane and gaseous oxygen is: C9H20 (l) + 14 O2 (g) → 9 CO2 (g) + 10 H2O (l)

The phases in the equation are:
- (l) for liquid nonane and liquid water
- (g) for gaseous oxygen and gaseous carbon dioxide.

When liquid nonane (C9H20) reacts with gaseous oxygen (O2) to form gaseous carbon dioxide (CO2) and liquid water (H2O), the balanced chemical equation can be expressed as:

C9H20(l) + 14O2(g) → 9CO2(g) + 10H2O(l)

In this equation, the phases are as follows:
- Liquid nonane (C9H20): liquid (l)
- Oxygen (O2): gas (g)
- Carbon dioxide (CO2): gas (g)
- Water (H2O): liquid (l)

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Answer:

There is a d sublevel in the third energy level, but it requires the electrons to have energy similar to electrons in the fourth energy level. The 3ds orbitals are not filled until after the 4s is filled.

Explanation:

Using the equation outlined in this video for conversion of ppm to mg/m³, 1 ppmv of oxygen gas, O2, at 2 atm and 0°C is equal to 2.85 mg/m³.

The conversion of ppm to mg/m³ for a gas can be done using the following equation:

mg/m³ = (ppm) x (molecular weight) x (density of gas at standard temperature and pressure (STP)) / (10^6)

For oxygen gas (O2), molecular weight = 32 g/mol and density at STP = 1.429 kg/m³.

So, 1 ppmv of O2 at 2 atm and 0°C is equal to:

mg/m³ = (1 ppm) x (32 g/mol) x (1.429 kg/m³) / (10^6) = 2.85 mg/m³

Therefore, the answer is B. 2.85 mg/m³.

Using the equation outlined in this video for conversion of ppm to mg/m³, 1 ppmv of oxygen gas, O2, at 2 atm and 0°C is equal to 2.85 mg/m³.

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Answer: Ionic attractions

Explanation:

Ionic bonding is a type of chemical bond that involves the electrostatic attraction between oppositely charged ions.

Answer:

Deposition

Explanation:

Deposition is the phase transition in which gas transforms into solid without passing through the liquid phase. Deposition is a thermodynamic process. The reverse of deposition is sublimation and hence sometimes deposition is called desublimation.