The H 2 produced in a chemical reaction is collected through water in a eudiometer. If the pressure in the eudiometer is 101.3 kPa and the vapor pressure of water under the experimental conditions is 2.41 kPa, what is the pressure (kPa) of the H 2 gas

Answer:

its sodium hydroxide

Explanation:

Answer:

See explanation and image attached

Explanation:

The acid-catalyzed hydration of 1-methylcyclohexene proceeds by an SN1 mechanism. The reaction involves the formation of carbocations.

Two carbocations are formed leading to the major and minor products. The major product is obtained from the tertiary (more stable) carbocation while the minor product is obtained from the secondary (less stable carbocation).

Tertiary alcohols are not oxidized, hence the major product does not undergo oxidation. However, secondary alcohols are oxidized to ketones.

Well, by definition,

molarity

=

moles of solute

volume of solution

Answer: Its B

Explanation:

Answer:

i can't understand the question

Answer:

Percent yield of CO₂ is 6.25 %.

Explanation:

Given data:

Percent yield of CO₂ = ?

Actual yield of CO₂ = 28.16 g

Number of moles of C₈H₁₈ = 8.000 mol

Number of moles of O₂ = 16.00 mol

Solution:

Chemical equation:

2C₈H₁₈ + 25O₂  →  16CO₂ + 18H₂O

Now we will compare the moles of C₈H₁₈ and O₂  with CO₂.

                 C₈H₁₈            :          CO₂

                    2                :             16

                  8.000          :            16/2×8.000 = 64 mol

                   O₂               :             CO₂

                    25              :              16

                     16              :              16/25×16= 10.24 mol

Less number of moles  of CO₂ are produced from 16 moles of O₂. it will limit the yield of CO₂.

Grams of CO₂ produced:

Mass = number of moles × molar mass

Mass = 10.24 mol  × 44 g/mol

Mass = 450.56 g

Percentage yield of CO₂:

Percentage yield = actual yield / theoretical yield × 100

Percentage yield = 28.16 g/ 450.56 g× 100

Percentage yield = 6.25 %

Answer:

The mass of sucrose in grams required to make  7% weight volume in 100 mL solution of water is 7g

Explanation:

The percentage weight of a solution is mostly referred to as percentage weight per volume (% w/v). The formula for this is

% w/v = g of solute/100 mL of solvent

sucrose is the solute here while water is the solvent. The mass (in grams) of the solute is the unknown

7% = g of solute/100 mL of water

where 7% equals/the same with 7/100;

7/100 = g of solute/100 mL of water

g of solute = 7 × 100/100

g of solute = 7 g

The mass of sucrose in grams required to make  7% weight volume in 100 mL solution of water is 7g

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45° Celsius

Formula (113°F − 32) × 5/9 = 45°C

Answer:

pH = 3.12

Explanation:

C7H7NH2   + HCl ---> C7H7NH3+Cl-

moles of C7H7NH2 = 0.027 x 0.063 = 1.7 x 10^-3  mol

moles of C7H7NH2 = moles of HCl at equivalence point

1.7 x 10^-3  = 0.048 x V

V = 0.035 L

volume of HCl = 0.035 L

so C7H7NH3+Cl- salt formed = 1.7 x 10^-3 moles

salt concentration = moles / total volume

= 1.7 x 10^-3 / (0.027 + 0.035)  = 0.027M

this salt formed from weak base strong acid . so pH <7

pH = 7 - 1/2 [pKb + logC]

pH = 7 -1/2 [9.33 + logC]

pH = 3.12

Answer:

1.answer = pushing force

= pulling force

=gravity force

Answer:  the substance in which another substance

Explanation:

done

Global winds form due to differential heating of the Earth's surface by the sun, creating convection currents in the atmosphere, which are influenced by the rotation of the Earth, resulting in circular wind patterns around the planet.

What causes global winds to form and why do they move in convection currents around Earth?

Global winds are caused by the differential heating of the Earth's surface by the sun. The sun heats the Earth's surface unevenly due to the varying angles of incidence of the sun's rays and the Earth's curvature. The equator receives more direct sunlight than the poles, which creates a temperature difference between these regions. This temperature difference causes the air to move from the equator to the poles, creating convection currents in the atmosphere.

These convection currents create global wind patterns that move in a circular pattern from the equator to the poles and back again. As the warm air rises near the equator, it moves towards the poles, where it cools and sinks back down to the surface. The cooler air near the poles then moves towards the equator to replace the rising warm air.

These wind patterns are also influenced by the rotation of the Earth, which causes the Coriolis effect. The Coriolis effect causes  wind to deflect to the right in the Northern-Hemisphere and to the far left in the Southern-Hemisphere.This deflection results in the formation of the trade winds, westerlies, and polar easterlies that are part of the global wind patterns.

In summary, the differential heating of the Earth's surface by the sun causes convection currents in the atmosphere, which create the global wind patterns. The rotation of the Earth influences these wind patterns, resulting in the formation of the trade winds, westerlies, and polar easterlies that move in a circular pattern from the equator to the poles and back again.

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Based on law of conservation of matter, the mass of the sawdust will be the same.

According to the principle of conservation of matter, matter can neither be created nor destroyed but can converted from one form to another.

The mass of the wood before it is converted to sawdust = 2.5 kg

The of the sawdust will be the same as the mass of the wood = 2.5 kg

Thus, we can conclude that based on law of conservation of matter, the mass of the sawdust will be the same.

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Answer:

Explanation:

mass of carbon in 10.27 g of CO₂ = 12 x 10.27 / 44 = 2.80 g

mass of hydrogen ( H ) in 3.363 g of H₂O = 2  x 3.363 / 18

= .373 g

These masses would have come from the sample of 6.165 g .

Rest of 6.165 g of sample is oxygen .

So oxygen in the sample = 6.165 - ( 2.8 + .373 ) = 2.992 g

Ratio of C  , H , O in the sample

2.8 : .373 : 2.992

C: H : O : : 2.8 : .373 : 2.992

Ratio of moles

C: H : O : : 2.8/12 : .373/1 : 2.992 / 16

C: H : O : : .2333 : .373 : .187

C: H : O : : .2333/.187 : .373/.187 : .187/.187

C: H : O : : 1.247 : 1.99 : 1

C: H : O : : 5 : 8 : 4 ( after multiplying by 4 )

Hence empirical formula

C₅H₈O₄

Molecular formula ( C₅H₈O₄ )n

n ( 5 x 12 + 8 x 1 + 4 x 16 ) = 132

n x ( 60 + 8 + 64 ) = 132

n = 1

Molecular formula = C₅H₈O₄.

It would require approximately 600 kilojoules of energy to vaporize 2 kg of copper.

To calculate the energy required to vaporize a substance, we need to consider the heat of vaporization, which is the amount of energy required to convert a given amount of substance from its liquid state to its gaseous state at a constant temperature.

The heat of vaporization for copper is approximately 300 kJ/kg (kilojoules per kilogram) at its boiling point, which is around 2567 degrees Celsius (4649 degrees Fahrenheit). This means that for every kilogram of copper, 300 kJ of energy is needed to vaporize it.

Given that you have 2 kg of copper, we can calculate the total energy required as follows:

Energy = Heat of Vaporization × Mass

Energy = 300 kJ/kg × 2 kg

Energy = 600 kJ

Therefore, it would require approximately 600 kilojoules of energy to vaporize 2 kg of copper.

It's worth noting that the heat of vaporization can vary slightly depending on the purity of the copper and the specific conditions, such as temperature and pressure. The value provided here is an approximation. Additionally, it's important to handle copper and any high-temperature processes with caution, as they can pose safety hazards.

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Answer:

44

Explanation:

Answer:

Explanation:

The missing image can be seen below.

From the given information:

The elimination process follows E2 mechanism which is a 2nd order kinetics.

At E2 mechanism, the base attaches with the beta hydrogen while also removing the leaving group in the same process. In the given compound 2-chloro-2-methylpropane, chloride is the leaving group that results in the product; 2-methylprop-1-ene.

The mechanism is seen in the second image,

Plants do not have bones that provide them with structure and support, they have tubes made of cellulose; option A.

The Achilles is a tendon and not a ligament; option D

The type of organism that has an exoskeleton is crustacean; option C.

All organisms have either an endoskeleton or an exoskeleton is False because plants do not have either an endoskeleton or an exoskeleton.

Plants unlike animals do not have skeletons that provide shape and support to them.

Instead, plants have sclerenchyma cell walls which are composed of lignin and extra cellulose. These provide support and shape to plants.

Ligaments are structures found in joints and other parts of the body that provide support to bones, joints, organs, and other structures.

Ligaments in the body include;

Exoskeletons are found in small animals and insects. For example, crustaceans have an exoskeleton.

Other larger organisms such as mammals. have an endoskeleton.

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Answer:

Object: To demonstrate phototropism

equipments: A black box, window with light source, a well watered potted plant.

Experiment: A wellwatered potted plant is placed inside a darkened black  box that is having a small window on one side. This is called as phototropic chamber. Window is remain closed for a day the plant shows normal growth.

Whereas if window is opened atwo days it will be found that shoot tip bends and grows towards light proving that it is positively phototropic.

Answer:

Aneroid barometer and mercury barometer are such two types. The main difference between aneroid and mercury barometer is that aneroid barometer measures the atmospheric pressure using the expansion of a metal whereas mercury barometer measures the atmospheric pressure by adjusting the height of mercury inside a tube.

Explanation:

Answer:

That is the Atomic mass

Explanation:

The element symbol is S, Element name is sulfur, and

Atomic number is 16

A leather jacket and printer paper are examples of items that can be made from renewable resources, while plastic forks, metal cans, and electronics are not considered renewable due to their reliance on non-renewable materials and processes. Option  C, E

The two correct answers that are made from renewable resources are:

C) Leather jacket: Leather is derived from animal hides, which are a byproduct of the meat industry. As long as there is a sustainable and responsible approach to animal farming, the production of leather can be considered renewable. The hides are obtained from animals that are raised for meat consumption, and their use in leather production helps reduce waste.

E) Printer paper: Printer paper can be made from various sources, including trees, bamboo, and recycled paper fibers. If the paper is sourced from sustainably managed forests or from fast-growing plants like bamboo, it can be considered renewable. Additionally, the use of recycled paper fibers reduces the demand for materials and promotes a more circular economy.

The other options, A) plastic fork, B) metal can, and D) electronics, are not made from renewable resources:

A) Plastic fork: Plastics are typically derived from fossil fuels, which are non-renewable resources. The production of plastic involves the extraction and processing of petroleum or natural gas, both of which are finite resources.

B) Metal can: Metal cans are predominantly made from aluminum or steel. While these metals can be recycled, their initial production requires the extraction of raw materials from the Earth, which is not a renewable process.

D) Electronics: Electronics are made from a wide range of materials, including metals, plastics, and various chemical compounds. The production of electronics involves the extraction of raw materials, many of which are non-renewable resources.

Option C and E.

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There are 7.708 x 10²² atoms present in  25.8 g of Hg.  

The number of atoms in an element is represented by the Avogadro's number, which tells us the number of atoms or molecules that are present in a mole of a substance.The  number is 6.0221415 x 10²³

To get  this, when given the mass of the element, we  must first

Remember that Number of moles =Mass/Molar mass

a. 25.8 g of Hg  

Number of moles = 25.8g of Hg /200.59 g/mol =0.128moles

Nmber of atoms =0.128moles x 6.0221415 x 10²³=7.708 x 10²² atoms

b. 0.0340 g of Zn

Number of moles = 0.0340g of Zn /65.38 g/mol =0.000520moles

Nmber of atoms =0.000520x 6.0221415 x 10²³=3.132 x 10²⁰atoms

c. 150 g of Ar

Number of moles = 150g of Ar /39.948 g/mol =3.7548moles

Nmber of atoms =3.7548molesx 6.0221415 x 10²³=2.261 x 10²⁴atoms

d. 0.124 g of Mg

Number of moles = 0.124g of Mg /24.305 g/mol =0.005moles

Number of atoms =0.005molesx 6.0221415 x 10²³=3.011 x 10²²atoms

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Answer:

There are 7.708 x 10²² atoms present in 25.8 g of Hg.

Number of Atoms

The number of atoms in an element is represented by the Avogadro's number, which tells us the number of atoms or molecules that are present in a mole of a substance.The number is 6.0221415 x 10²³

To get this, when given the mass of the element, we must first

find the moles

Then multiply the amount of moles by Avagadro's number

Remember that Number of moles =Mass/Molar mass

a. 25.8 g of Hg

Number of moles = 25.8g of Hg /200.59 g/mol =0.128moles

Nmber of atoms =0.128moles x 6.0221415 x 10²³=7.708 x 10²² atoms

b. 0.0340 g of Zn

Number of moles = 0.0340g of Zn /65.38 g/mol =0.000520moles

Nmber of atoms =0.000520x 6.0221415 x 10²³=3.132 x 10²⁰atoms

c. 150 g of Ar

Number of moles = 150g of Ar /39.948 g/mol =3.7548moles

Nmber of atoms =3.7548molesx 6.0221415 x 10²³=2.261 x 10²⁴atoms

d. 0.124 g of Mg

Number of moles = 0.124g of Mg /24.305 g/mol =0.005moles

Number of atoms =0.005molesx 6.0221415 x 10²³=3.011 x 10²²atoms

Explanation:

If iron has a density of 7.87g/cm³ and a mass of 3.729g, then the volume of iron is 0.474cm³

HOW TO CALCULATE VOLUME:

Volume (mL) = mass (g) ÷ density (g/mL)

Volume = 3.729 ÷ 7.87

Volume = 0.474cm³

Therefore, the volume of iron is 0.474cm³

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The given reaction has ΔG value  -12207KJ. Therefore, the given reaction is a spontaneous reaction as value of ΔG is negative.

A spontaneous process refers to anything that happens by itself, without external energy input. A ball is going to roll down an incline, water will flow downhill, ice will melt into water, radioactive elements will decay, and iron will rust, for instance. It is impossible for a reaction to not be spontaneous if it is exothermic (H negative) and increases the entropy for the system (S positive). The system's overall heat capacity is measured in enthalpy. The system's unpredictability is gauged by entropy.

ΔG=ΔH-T×ΔS

ΔG=11-298×41

     = -12207KJ

Since ΔG is negative, reaction is spontaneous

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Answer:

Example 1

palladium(II) nitrate,

Example 2

Metal catalysts such as Fe, Ni, Mo, and Co are routinely used in the manufacture of CNMs.

Explanation

The three metals used in catalytic converters — rhodium, platinum and palladium — are part of a category known as platinum group metals, or PGMs, which are known for their catalytic properties.

Answer:

A

Explanation:

Atomics number = number of protons