Which of the following is not true regarding bimolecular reactions?


a. Rate of reaction is dependent on rate of collision

b. kassoc is the inverse of kdissoc

c. Irreversible reactions cannot reach equilibrium

d. Kassoc is the inverse of Kdissoc

Answer:

ionic bond, also called electrovalent bond, type of linkage formed from the electrostatic attraction between oppositely charged ions in a chemical compound. Such a bond forms when the valence (outermost) electrons of one atom are transferred permanently to another atom.

Explanation:

The discrepancy between the atomic masses and the masses number of the atomic (M) is equal to the amount of neutrons (Z).

In contrast to the hydrogen nucleus, which has a single proton, neutrons are necessary for the durability of nuclei. Nuclear fusion or fission generate a ton of neutrons. Through fusion, fusion, and spontaneous fission processes, they are a major contributor to the planetary formation of fundamental particles within stars.

Hydrogen = 0 neutrons

Helium = 2 neutron

lithium=4 neutron

beryllium=5 neutron

boron = 6 neutron

carbon = 6neutron

nitrogen=7n

oxygen= 8n

fluorine= 10n

neon= 10n

sodium= 12n

magnesium= 12n

aluminum = 14 n

silicon= 14n

phosphorus= 16n

sulphur= 16n

chlorine= 18 n

argon= 22 n

potassium= 20n

calcium= 20n

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Answer:

Ionic bonds form between nonmetals and metals. So just choose the one with a nonmetal element (like Na) and a metal element (like Cl)

Answer:

A

Explanation: K and Br

Answer: PtF6

Explanation:  is one of seventeen known binary hexafluorides.

Answer: Fe

Explanation: Fe (Iron) is the only element since it involves only 1 atom. The other options are compounds, since there are more than 2 atoms bonded together.

Answer:

B

Explanation:

The respiratory removes carbon, and the excretory removes other waste products

Answer:

0.967mole

Explanation:

Given parameters:

Volume of NH₄Cl  = 21.67L

Unknown:

Number of moles  = ?

Solution:

If we assume that the volume was taken at standard temperature and pressure,

 Then;

  Number of moles  = \(\frac{volume }{22.4L}\)  

 Number of moles  = \(\frac{21.67}{22.4}\)   = 0.967mole

The number of molecules in 10.0 gram of NaOH is 15 * 10²².

To solve this question, we need to understand some terms of mole concept,

Mole - It is the amount of substance containing same number of molecules or atoms as there are atoms in 12 gram of carbon-12 isotope.

Molecules - It is group of atoms bonded together, representing the smallest fundamental unit of a chemical compound taking part in chemical reaction.

Molecular weight - The sum of atomic masses of all atoms in molecules.

Avogadro number - It is the number of atoms, ions, electrons, molecules in one mole of substance. It is represented as NA.

NA = 6.0 * 10²³ (approx)

To calculate the number of molecules, we apply the formulae,

no. of molecules = moles * NA

moles = weight / molecular weight

moles = 10.0 / 40

          = 0.25

Substituting this value to calculate number of molecules,

no. of molecules = 0.25 * 6.0 * 10²³

                            = 15 * 10²²

Therefore the number of molecules of in 10.0 g of NaOH is 15 * 10²².

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Based on the provided data, the concentration of ammonia in the cloudy ammonia solution is 0.200 M.

The balanced chemical equation for the reaction between ammonia and hydrochloric acid is:

NH3(aq) + HCl(aq) → NH4Cl(aq)

From the equation, we see that one mole of ammonia reacts with one mole of hydrochloric acid to produce one mole of ammonium chloride.

To determine the concentration of ammonia in the cloudy ammonia solution, we need to find out how many moles of hydrochloric acid were used to react with the ammonia.

The number of moles of HCl used is:

moles of HCl = concentration of HCl × volume of HCl used

moles of HCl = 0.100 mol/L × 0.0500 L

moles of HCl = 0.00500 mol

Since the reaction is 1:1 between HCl and NH3, the number of moles of NH3 in the cloudy ammonia solution is also 0.00500 mol.

The volume of the cloudy ammonia solution used is 25.00 mL, which is equivalent to 0.02500 L.

The concentration of ammonia in the cloudy ammonia solution is:

concentration of NH3 = moles of NH3 / volume of cloudy ammonia solution

concentration of NH3 = 0.00500 mol / 0.02500 L

concentration of NH3 = 0.200 mol/L or 0.200 M

Therefore, the concentration of ammonia in the cloudy ammonia solution is 0.200 M.

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Answer:

Reaction??

Explanation:

When NH₄OH and CaS are mixed the following reaction occurs:

NH₄OH + CaS ---> Ca(OH)₂ + (NH₄)₂S

Ca(OH)₂ is a poorly soluble base in water. So the formula of the precipitade formed is Ca(OH)₂ and its name is calcium hydroxide.

Bases with cations of the group II of the periodic table are generally poorly soluble in water.

From the list provided, the following groups are part of the periodic table are Metals, Nonmetals , Semimetals and Conductors .

Metals: Metals are a group of elements that are typically solid, shiny, malleable, and good conductors of heat and electricity. They are located on the left-hand side and middle of the periodic table.

Nonmetals: Nonmetals are elements that have properties opposite to those of metals. They are generally poor conductors of heat and electricity and can be found on the right-hand side of the periodic table.

Semimetals: Semimetals, also known as metalloids, are elements that have properties intermediate between metals and nonmetals. They exhibit characteristics of both groups and are located along the "staircase" line on the periodic table.

Conductors: Conductors are materials that allow the flow of electricity or heat. In the context of the periodic table, certain metals and metalloids are good conductors of electricity.

Therefore, the groups that are part of the periodic table are metals, nonmetals, semimetals, and conductors. The other groups mentioned, such as acids, flammable gases, and ores, are not specific groups found on the periodic table but may be related to certain elements or compounds present in the table.

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The complete question is :

From the list below, choose which groups are part of the periodic table.

metals

acids

flammable gases

nonmetals

semimetals

ores

conductors

Answer:

Elements: U and Li

Compounds: \(H_2O\), \(MgCl_2\), and \(Li(OH)_2\)

Explanation:

Elements are pure substances that are not bonded with any other atom.  They are found in the Periodic Table of Elements.  For this question, only U and Li are pure substances, they are the only items listed in the Periodic Table, and they are the only elements in the list.

Compounds are groups of elements that are chemically bonded.  When writing them, the elements that compose them are listed.  \(H_2O\) is two hydrogen and one water, \(MgCl_2\) is one magnesium and two chlorine, and \(Li(OH)_2\) is one lithium and two hydroxide ions.  The two hydroxide ions are composed of one hydrogen and one oxygen each.  These three items are all compounds of various elements.

Explanation:

A substance burning in the presence of oxygen and leads to the formation of heat and light is called combustion.

Some important points about combustion are as follows:

The pH of the strong acids are:

HBr; pH = 1.28

HNO₃; pH = 1.77

The pH of a solution is a measure of the acidity or basicity of a solution.

pH is the negative logarithm to base 10 of the hydrogen ion concentration of a solution.

Mathematically; pH = - log [H⁺]

The pH of the strong acids is calculated below:

For HBr:

[H⁺] = 5.2 * 10⁻² mol/L

pH = - log (5.2 * 10⁻²)

pH = 1.28

For HNO₃;

[H⁺] = 1.7 * 10⁻² mol/L

pH = - log (1.7 * 10⁻²)

pH = 1.77

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The balanced chemical reaction between lithium and nitrogen is;

6Li(s) + N₂(g) → 2Li₃N(s)

From the equation above, we can deduce that; 6 moles of lithium reacts with 1 mole of nitrogen gas. The molar volume of a gas at STP is 22.4 L/mol.

Therefore, at STP, 1 mole of a gas occupies a volume of 22.4 L.

So, 55.2 mL of nitrogen gas at STP is;

55.2/1000 = 0.0552 Liters.

Number of moles of nitrogen gas = volume of gas at STP/STP volume per mole of gas:

0.0552/22.4 = 2.46 × 10⁻³ moles.

Lithium required to react completely with the nitrogen gas:

6 × (2.46 × 10⁻³) = 0.0148 g (approx. 0.015 g).

Therefore, the mass of lithium required to react completely with 55.2 mL of N₂ gas at STP is approximately 0.015 g.

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Answer:

Animal cells are more round and do not have a rigid cell wall.

Explanation:

Answer:

Explanation:

b

The second answer option shows a metal element.

We can arrive at this answer because:

Metals have one or two electrons in the valence layer, in which case, in the Lewis point diagram, metal would be represented with one or two points around the element symbol.

Among the answer options shown in the question above, the second option is the only one that represents a metal.

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Answer:

0.073 g

here is to keep in mind that you need 2 moles of hydrochloric acid in order to neutralize 1 mole of magnesium hydroxide.

Explanation:

The term that best describes the role of certain metal ions and coenzymes in metabolic processes is "catalyst." These ions and coenzymes act as catalysts, facilitating chemical reactions and speeding up metabolic processes within the body.

The term that best describes the role of certain metal ions and coenzymes in metabolic processes is "cofactor." A cofactor is a non-protein chemical compound or metal ion that is required for an enzyme's activity.

It plays an essential role in various metabolic processes by stabilizing the enzyme structure, facilitating substrate binding, or participating in catalytic reactions.

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The products Rosa recorded in the last row of the table should be: 2LiCl + 3O₂.

The type of reaction which Rosa did is a decomposition reaction which involves one compound that yields to more than one (or usually two) product. To determine the product, we can deduce that it has to contain elements of Li, Cl and O₂. So, from the options, the answer is 2LiCl + 3O₂.

A decomposition reaction can be described as a chemical reaction in which one reactant breaks down into two or more products. Generally, decomposition reactions need energy input.

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Answer:

it would have sound a

thermal .why a train needs coal and coal get burned by heat that is thermal energy and sound beacuse a train makes sound by moving

Explanation:

have a good day /night

may i please have a branlliest

The two's complement system is better than the one's complement system mainly due to its efficiency and simplicity in handling signed binary numbers.

In the two's complement system, negative numbers are represented by the two's complement of the positive equivalent, which is found by inverting all bits and adding one. This representation removes the ambiguity of having both positive and negative zero, as seen in the one's complement system, allowing for a single zero value. Additionally, the two's complement system simplifies arithmetic operations like addition and subtraction. In one's complement, an end-around carry must be added back into the result, whereas, in two's complement, arithmetic operations can be performed without any special adjustment. This leads to faster and more efficient computation in digital systems.

Moreover, the two's complement system has better range, as it can represent one more negative number compared to the one's complement system. This is crucial in limited bit-width scenarios, such as 8-bit or 16-bit computers, where the range of representable numbers is a critical factor. In summary, the two's complement system offers improved efficiency, simplicity, and range compared to the one's complement system, making it a better choice for handling signed binary numbers in digital computing systems.

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The solubility of oxygen at 10m depth below sea level, 25 degrees Celsius, and 30 g/L salinity is approximately 6.59 mg/L.

To calculate the solubility of oxygen at a specific depth below sea level, temperature, and salinity, we can refer to the oxygen solubility tables. The solubility of oxygen can vary depending on these factors.

1. Begin by identifying the given parameters:
  - Depth: 10m below sea level
  - Temperature: 25 degrees Celsius
  - Salinity: 30 g/L

2. Use the given parameters to locate the corresponding values in the oxygen solubility table.

3. The solubility of oxygen at a depth of 10m below sea level, 25 degrees Celsius, and 30 g/L salinity is typically around 6.59 mg/L.

Therefore, the solubility of oxygen at 10m depth below sea level, 25 degrees Celsius, and 30 g/L salinity is approximately 6.59 mg/L.

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The oxygen solubility at 10m depth below sea level, 25°C, and 30 g/L salinity is approximately 1538 mol/L.

To calculate the oxygen solubility at a specific depth below sea level, temperature, and salinity, we can use the solubility formula.

The solubility of a gas decreases with increasing temperature and salinity, and increases with increasing pressure.

Here's how you can calculate the oxygen solubility at 10m depth below sea level, 25°C, and 30 g/L salinity:

1. Determine the pressure at 10m depth below sea level: -

The pressure at sea level is approximately 1 atmosphere (atm).

The pressure increases by approximately 1 atm for every 10 meters of depth.

Therefore, at 10m depth, the pressure is approximately 2 atm.

2. Convert the temperature to Kelvin: -

To convert from Celsius to Kelvin, add 273 to the temperature.

25°C + 273 = 298 K.

3. Use the solubility formula:

The solubility of oxygen in water can be calculated using Henry's law:

S = k * P * C.

S is the solubility of oxygen in moles per liter (mol/L).

k is the Henry's law constant for oxygen in water at a specific temperature and salinity.  

P is the partial pressure of oxygen in atmospheres (atm).

C is the concentration of oxygen in moles per liter (mol/L).

4. Look up the Henry's law constant for oxygen at 25°C and 30 g/L salinity:

The Henry's law constant for oxygen at 25°C and 30 g/L salinity is approximately 769 L*atm/mol.

5. Calculate the solubility:  

S = (769 L*atm/mol) * (2 atm) * (1 mol/L). - S ≈ 1538 mol/L.

Therefore, the oxygen solubility at 10m depth below sea level, 25°C, and 30 g/L salinity is approximately 1538 mol/L.

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Answer:

Its density is exactly the same as that of pure stearic acid. Its boiling point is the same as that of pure stearic acid. Its melting point is different from pure stearic acid.

Answer:

97.5g NaCl will be produced with 80.0 grams of O2

Explanation:

2NaClO3​→2NaCl+3O2

O2​=31.98 g/mol and NaCl = 58.44 g / mol

The moles of CO₂ gas was generated at 0.01302 mol.

The Ideal Gas Law equation can be used for calculating the moles.

PV = nRT

n = PV/RT

Where:

P = pressure = 1.3 atm

V = volume = 250 mL = 0.25 L

n = number of moles of CO₂ gas

R = ideal gas constant = 0.0821 L·atm/mol·K

T = temperature in Kelvin = (31 + 273) K = 304 K

Substituting the values in the above equation.

n = (1.3 atm)(0.25 L) / (0.0821 L·atm/mol·K)(304 K)

n = 0.01302 mol CO₂ gas

Therefore, 0.0152 moles of CO₂ gas were generated.

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The important properties of RNA polymerase from E. coli are It reads the DNA template from its 3' end to its 5' end during RNA synthesis and It uses a single strand of dsDNA to direct RNA synthesis. It is composed of five different subunits. SO, Option D, A and B are correct.

It is a multisubunit enzyme that contains many functional regions that are critical for the synthesis of RNA from a DNA template.The RNA polymerase of E. coli is a complex enzyme that has a number of important properties. The RNA polymerase is composed of five different subunits that are arranged in a holoenzyme configuration.

This holoenzyme is responsible for the recognition of promoter sequences on the DNA template and the subsequent initiation of RNA synthesis. RNA polymerase from E. coli reads the DNA template from its 3' end to its 5' end during RNA synthesis. This is in contrast to DNA polymerase, which reads the DNA template from its 5' end to its 3' end during DNA replication.

RNA polymerase from E. coli uses a single strand of dsDNA to direct RNA synthesis. The enzyme recognizes the template strand and reads it in the 3' to 5' direction, synthesizing the RNA strand in the 5' to 3' direction. This process is called transcription.

Therefore, Option A,B, and D are correct.

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