Consider the following representation of a reaction mechanism.

Step 1: A+A → C+E (slow)
Step 2: E + B → A+D (fast)
Overall reaction: A + B → C + D

What should appear in the rate law for the reaction above?

A) only A and B because they are reactants in the overall reaction

B) only C and C because they are products in the overall reaction

C) only A because it is the reactant in the rate-determining step

D) only E and B because they are the reactants in the rate-determining step​

Answer:

most elements are metals

Alkenes can be converted to alcohols by hydroboration–oxidation, which is true as in hydroboration, the alkene reacts with borane (BH3) or its complex with tetrahydrofuran (THF), forming a boron-containing intermediate. So answer is option A.

In hydroboration, the alkene reacts with borane (BH₃) or its complex with tetrahydrofuran (THF), forming a boron-containing intermediate. This reaction follows Markovnikov's rule, where the boron atom adds to the carbon atom with the greater number of hydrogen atoms. After hydroboration, the boron intermediate is oxidized with hydrogen peroxide (H₂O₂) and a basic solution (such as sodium hydroxide, NaOH) in the presence of water. This oxidation step replaces the boron atom with a hydroxyl group (OH-), resulting in the formation of an alcohol.

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complete question is below

alkenes can be converted to alcohols by hydroboration–oxidation

A. YES

B. NO

Answer:

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Yes,a plane mirror can form a real image. A plane mirror can form a real image only for a virtual object. These converging rays of incidents light after reflection intersect at a point to give a real image.

hope helpful~

Plane mirrors always produce virtual images, because they never focus light into a single converging point.

Hence it does not produce real object or image

As power of the plane mirror is zero, hence, it neither converges nor diverges the rays.

Answer:

1- fission

2- fusion

3- radioactive decay

4- gamma

5- alpha particle

6(high speed electron)- beta rays

7-plasma

To "fix" hydrogen means to convert it from its gaseous form (H₂) into a chemically usable form or compound.

Fritz Haber's method for fixing hydrogen, known as the Haber-Bosch process, involves combining hydrogen (H₂) with nitrogen (N₂) from the air to produce ammonia (NH₃) through a catalytic reaction. This ammonia can then be used to produce fertilizers, explosives, and other important chemicals.

Fritz Haber's method is considered the most important invention of the twentieth century because it revolutionized agriculture and food production. The production of ammonia-based fertilizers made it possible to significantly increase crop yields, addressing global food shortages and supporting a growing population.

This process had a profound impact on global agriculture and played a crucial role in the Green Revolution, which helped alleviate hunger and improved living standards worldwide.

Additionally, the Haber-Bosch process also enabled the production of synthetic materials, such as plastics and fibers, that have transformed various industries and contributed to technological advancements.

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The value of Kc for the given reaction is approximately 0.109 .

To calculate the value of Kc for the reaction X(g) + 2Y(g) ⇌ 2Z(g) with Kp = 2.13 × 10^(-2) at a temperature of 127°C, follow these steps:

Step 1: Write down the given information:
Kp = 2.13 × 10^(-2)
T = 127°C = 400.15 K (convert from Celsius to Kelvin by adding 273.15)

Step 2: Use the relationship between Kp and Kc, which is:
Kp = Kc(RT)^(Δn)
where R is the ideal gas constant (0.0821 L atm/mol K), T is the temperature in Kelvin, and Δn is the change in moles of gas in the balanced equation.

Step 3: Calculate Δn:
Δn = (moles of product gas) - (moles of reactant gas) = (2 - 1 - 2) = -1

Step 4: Rearrange the equation to solve for Kc:
Kc = Kp / (RT)^(Δn)

Step 5: Plug in the given values and calculate Kc:
Kc = (2.13 × 10^(-2)) / ((0.0821)(400.15))^(-1)
Kc ≈ 0.109

So, the value of Kc for the given reaction is approximately 0.109.

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Without more information, it is not possible to answer this question. Points may be awarded for a variety of reasons, such as completing a task, achieving a goal, or winning a competition.

Variety is the state of having different forms, types, or ideas. It is a concept that can refer to a wide range of different things, from different cultures and ethnicities to different types of art and music. Variety can be seen in nature, as different species of animals and plants exist in different climates and ecosystems. Variety can also be found in the workplace, as different people bring different skills and perspectives to a job. Variety can also refer to different daily experiences, such as trying out different foods and activities. Variety is an important part of life, as it helps to bring variety to one's life and can help keep things interesting. Variety promotes creativity, as it encourages people to try new things and explore different options. Ultimately, variety adds spice to life and can help keep one's life interesting and enjoyable.

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Answer:Hi! I hope this will help you with your question, whether this is an assignment or not. The answer that I get is 0.033 concentration.

If 0.0025 mol NaNo3 forms during the reaction, the concentration of NaNO3 in the final solution should be 0.033.

Explanation:

Answer: the number of a chemical element in the periodic system,

Explanation:

Answer:

The reactants in the given equation are:

Carbon dioxide (CO₂)

Water (H₂O)

Calcium chloride is an ionic compound that is formed by the reaction of calcium metal with chlorine gas. In contrast, calcium and chlorine are both elements that exist as atoms, with calcium being a metal and chlorine being a nonmetal.

The difference in properties between the reactants and products can be explained in terms of their bonding and structure.

In the reaction between calcium and chlorine, electrons are transferred from calcium atoms to chlorine atoms to form calcium ions (Ca2+) and chloride ions (Cl-). This type of bonding, known as ionic bonding, results in the formation of an ionic compound in which the ions are held together by strong electrostatic forces of attraction.

In contrast, the properties of calcium and chlorine are determined by their atomic structure and the types of bonding that exist within their molecules.

Calcium is a metallic element, which means that it has a strong tendency to lose electrons and form cations.

Chlorine, on the other hand, is a nonmetallic element that has a strong tendency to gain electrons and form anions.

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The pillar of sustainability broken by recycling electronics in India is environmental sustainability. Implementing a law that restricts electronics recycling to the US would not necessarily be the most effective solution, as it overlooks the complex global dynamics of electronic waste management.

Recycling electronics in India often involves improper disposal methods, such as burning or dismantling without proper safety measures. This leads to environmental pollution, including the release of hazardous substances into the air, soil, and water, thus violating the principle of environmental sustainability.

However, simply mandating that electronics can only be recycled in the US may not be the most optimal solution. Electronic waste is a global issue, and restricting recycling to a single country disregards the fact that electronic products are manufactured and consumed worldwide. A more comprehensive approach to addressing electronic waste would involve international cooperation, strict regulations, and monitoring of recycling practices to ensure they meet environmental standards.

Efforts should focus on improving recycling practices globally, including promoting responsible electronic waste management, developing sustainable recycling infrastructure in multiple countries, and encouraging the adoption of safe and environmentally friendly recycling practices. This approach would foster global sustainability and address the challenges associated with electronic waste disposal more effectively than a geographically limited restriction.

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Answer:

A mercury barometer is an instrument used to measure atmospheric pressure in a certain location and has a vertical glass tube closed at the top sitting in an open mercury-filled basin at the bottom. Mercury in the tube adjusts until the weight of it balances the atmospheric force exerted on the reservoir.

Answer:

b is the anwer

Explanation:

the option is the explanation

a. There are 0.1596 moles of NaCl in 0.3 L of NaCl stock solution.

b. There are 0.1596 moles of NaCl in 2.1 L of NaCl dilute solution.

c. The concentration of NaCl in the final solution is 0.076 M.

Molarity is said to be the number of moles of solute per liter of solution. For example, when salt is dissolved in water, the salt becomes the solute and the water becomes the solution. Since, one mole of sodium chloride weighs 58.44 grams and dissolving 58.44 grams of NaCl in 1 liter of water makes a 1 molar solution, abbreviated as 1M.

c. Let's calculate the concentration of NaCl in the final solution:

M₁V₁ = M₂V₂

M₁ = Initial concentration of NaCl (0.532 M)

V₁ = Initial volume of NaCl (0.3 L)

M₂ = Final concentration of NaCl

V₂ = Initial volume of NaCl (2.0 L)

0.532 × 0.3 = M₂ × 2.1

M₂ = (0.532 × 0.3)/2.1

M₂ = 0.076 M

a. To calculate number of moles in 0.3 L of NaCl stock solution.

Molarity = Mole of solute/Volume of solution

0.532 = Mole of NaCl/0.3

Mole of NaCl = 0.532×0.3

Mole of NaCl = 0.1596 mol

b. To calculate number of moles in 2.1 L of NaCl solution.

0.076 = Mole of NaCl/2.1

Mole of NaCl = 0.076×2.1

Mole of NaCl = 0.1596 mol

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Two possible sources of systematic (determinate) error in the experiment are; Incorrect calibration of volumetric glasswareIncorrect mass of NaCl

To calculate the concentration of NaCl in the resulting solution in mg/L NaCl, we can use the formula; Concentration (mg/L) = (Mass of solute ÷ Volume of solution in L) × 1000 g / 1 mg NaCl is present in the stock solution of 25 mL. So, the mass of NaCl in the solution would be;0.0842 g ÷ 25 mL = 0.00337 g/mL. Now, in the resulting solution, a 1.00 mL aliquot of the stock solution is transferred to a 50.00 mL volumetric flask and diluted to volume. Therefore, the volume of the resulting solution is 50.00 mL. We will substitute these values in the formula, Concentration (mg/L) = (0.00337 g/mL ÷ 50 mL) × 1000 g / 1 mg concentration (mg/L) = 67.4 mg/L. Therefore, the concentration of NaCl in the resulting solution in mg/L NaCl is 67.4 mg/L.7.  Concentration = 67.4 mg/LTolerance = 4.28 mg/LTotal concentration = 67.4 + 4.28 mg/L = 71.68 mg/LWe round off this value to one decimal place; Total concentration = 71.7 mg/LTherefore, the concentration of NaCl in the resulting solution using propagation of error through the calculation is 67.4+0.4 mg/L.8. Two possible sources of random (indeterminate) error in the experiment are; Errors in temperature measurement. Errors in measurement of water volume. Two possible sources of systematic (determinate) error in the experiment are; Incorrect calibration of volumetric glasswareIncorrect mass of NaCl.

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The words that complete these descriptions are law, hypothesis, and experiment.

In science, a law is a statement that accurately describes the way a natural phenomenon occurs. Due to this, laws are created after testing a hypothesis several times. This matches Jean-Baptiste's proposal because his idea about heat flow has been tested by himself and others multiple times.

Different from a law, a hypothesis only states a possible explanation but this should be tested to become a law. This concept can be applied to Sadi because he only has an idea about heat flow but this has not been tested.

This is a procedure that aims at testing a hypothesis. This concept applies to James because he is carrying out an objective procedure to understand energy and heat.

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Answer: The amount of energy lost by the metal is equal to the amount of energy gained by the water

Explanation:

Answer: chlorofluorocarbon

Explanation:

chlorofluorocarbon

Answer:

Carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O) are greenhouse gases. Chlorofluorocarbons (CFCs) are also considered greenhouse gases, but they are now largely banned due to their damaging effects on the ozone layer.

Explanation:

When heat energy is absorbed by room temperature water, the average kinetic energy of water molecules increases, leading to an increase in water temperature.

When heat energy is absorbed by room temperature water, it causes an increase in the average kinetic energy of water molecules. Heat is a form of energy that can be transferred from a higher temperature object to a lower temperature object, resulting in an increase in the internal energy of the lower temperature object. In the case of water, as heat is absorbed, the water molecules gain energy and their motion becomes more energetic.

The increased kinetic energy leads to an increase in the temperature of the water. This is because temperature is a measure of the average kinetic energy of the particles in a substance. As the average kinetic energy of water molecules increases, the temperature of the water rises. The extent of the temperature increase depends on the amount of heat energy absorbed and the specific heat capacity of water, which is relatively high compared to many other substances.

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A whorl is found in 16 listed for one of the fingers

A 10-finger classification method is the main one. Therefore, it must be applied when both hands' prints are present. The world's fingerprints might be classified into 1,024 groups using this technique.

Each hand's finger is assigned a unique number. The fingers of the right hand are numbered from one to five, beginning with the right thumb. They are numbered 6 through 10 on the left hand, beginning with the thumb. As an illustration, the left middle finger is numbered 8, and the right ring finger is numbered 4.

The precise finger and the print pattern are used for classification. Only if each finger has a whorl design is it assigned a value. The finger is assigned a value of zero if it has an arch or loop. If a finger has a whorl, not all fingers are valued equally. The value assigned to a finger with a whorl design is shown in the following chart.

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Answer:

first option is not true

Explanation:

1 mole = 6.02 × 10²³ particles

C3H8 has 1 mole, so has 6.02 × 10²³ particles

5O2 has 5 moles so 5 × 6.02 × 10²³ = 3.01 × 10²⁴ particles

3CO2 has 3 moles so 3 × 6.02 × 10²³ = 1.806 × 10²⁴ particles

4H2O has 4 moles so 4 × 6.02 × 10²³ = 2.408 × 10²⁴ particles

The final pressure of the gas is 0.30 atm. Option C is correct.

The relationship between the pressure and volume of a gas is given by Boyle's law, which states that the pressure of a gas is inversely proportional to its volume at constant temperature and amount of gas. Mathematically, this can be written as;

P₁V₁ = P₂V₂

where P₁ and V₁ are the initial pressure and volume, and P₂ and V₂ are the final pressure and volume.

Using the given values, we can write;

P₁ = 1.2 atm

V₁ = 1.0 L

V₂ = 4.0 L

Solving for P₂, we get;

P₂ = (P₁V₁)/V₂

P₂ = (1.2 atm x 1.0 L)/4.0 L

P₂ = 0.30 atm

Hence, C. is the correct option.

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1. matter

2. oxygen

3. water

4. hydrogen

5. compound

hope it helps :)

Answer:

See explanation

Explanation:

We know that photosynthesis involves the combination of carbon dioxide and water in the presence of sunlight to yield glucose.

If the atmosphere is rich in carbon dioxide such as  in a green house where air is filled with carbon dioxide, the rate of photosynthesis is increased.

As the rate of photosynthesis is increased, the growth of plants is also increased.

Hence, in a greenhouse where the air contains more carbon dioxide, the rate of plant growth increases.

Answer:

false

Explanation:

Answer:

False.

Explanation:

The sum of potential energy and the kinetic energy of an object is mechanical energy.

Hope that this helps!!! :)

The probability of observing at least one ICU admission, among the next six patients hospitalized for COVID-19 is 0.26491. Option A is correct.

The probability of not observing any ICU admission among the next six patients hospitalized for COVID-19:

Probability of not observing ICU admission = 1 - Probability of observing ICU admission

= 1 - 0.05

= 0.95

Probability of no ICU admission among the next six patients hospitalized for COVID-19:

Probability of no ICU admission in one trial = 0.95

Probability of no ICU admission in six trials (patients)

= 0.95 × 0.95 × 0.95 × 0.95 × 0.95 × 0.95

= 0.73509

Now, we can calculate the probability of observing at least one ICU admission among the next six patients hospitalized for COVID-19:

Probability of at least one ICU admission= 1 - Probability of no ICU admission

= 1 - 0.73509

= 0.26491

Therefore, the answer is A.

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Ideal gas law is valid only for ideal gas not for vanderwaal gas. To solve such, we need to know the relation between rate of effusion and molar mass of gases. Therefore, the molar mass of unknown gas is 48 g/mol. The correct option is option E.

Ideal gas equation is the mathematical expression that relates pressure volume and temperature.

Mathematically the relation between rate of effusion of gases and their molar masses can be given as:

rate of effusion of unknown gas/rate of effusion of nitrogen gas=√molar mass of nitrogen /molar mass of particular gas

Substituting all the given values we get

2.5 × 10⁻⁶÷ 3.3 × 10⁻⁶=√28÷ molar mass of unknown gas

0.56=28g÷ molar mass of unknown gas

molar mass of unknown gas =48 g/mol

Therefore, the molar mass of unknown gas is 48 g/mol. The correct option is option E.

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Sulfuric acid reacts with aluminum hydroxide by double replacement and If 30.0 g of sulfuric acid reacts with 25.0 g of aluminum hydroxide  then the limiting reactant will be H₂SO₄

The balanced equation for the reaction between sulfuric acid and aluminum hydroxide is,

                       3H₂SO₄     +   2Al(OH)₃ → Al₂(SO₄)₃ +   6H₂O

mass of H₂SO₄  =        30.0 g            

Molar mass of H₂SO₄  =   98 g/mol

moles of H₂SO₄ = 30.0 g /98g /mol = 0.306 mol

mass of Al(OH)₃            =         25.0 g            

Molar mass of Al(OH)₃  =   78 g/mol

moles of Al(OH)₃           = 25.0 g/ 78 g/mol = 0.321 mol

The stoichiometric ratio between H₂SO₄  and Al(OH)₃ is 3:2

Hence reacted moles of H₂SO₄ = 0.306 mol

           reacted moles of Al(OH)₃ = 0.306 mol x (2 / 3) = 0.204 mol

Hence the limiting reactant is H₂SO₄

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