the henry's law constant (kh) for o2 in water at 20°c is 1.28e-3 mol/l atm. how many grams of o2 will dissolve in 1.5 l of h2o that is in contact with pure o2 at 1.47 atm

The empirical rate law for the given reaction is:rate = k[NO2][F2]In order to match the empirical rate law for the reaction, the two proposed mechanisms have to be analyzed. Given mechanism are:a. NO2(g) + F2(g) ⇌ NO2F(g) + F2(g) fastNO2(g) + F(g) → NO2F(g) slowb.

NO2(g) + F2(g) ⇌ NO2F(g) + F2(g) slowNO2(g) + F(g) → NO2F(g) fastc. F2(g) ⇌ F(g) slow2NO2(g) + 2F(g) → 2NO2F(g) fastThe step that is slow in the mechanism is the rate-determining step. The rate law for each step can be determined by the molecularity of the reaction. The molecularity of a reaction is the number of molecules that participate in the collision leading to a successful reaction.For mechanism a, rate law is k1[NO2][F2].The second step is the slow step so the rate-determining step is rate = k2[NO2F][F].k2 is very small in comparison to k1, so the rate law will be dominated by k1 rate = k1[NO2][F2]. Therefore, mechanism a is consistent with the empirical rate law.For mechanism b, the rate-determining step is the slow step so the rate law is rate = k2[NO2][F]. k2 is much smaller than k1, so the rate law will be dominated by k2rate = k2[NO2][F2]. Therefore, mechanism b is not consistent with the empirical rate law.For mechanism c, the slow step is the only step so the rate law is k3[NO2][F2]. The rate law is not consistent with the empirical rate law.So, the correct option is a.

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Answer:

Mass of water == 1.71 g

Explanation:

Given data:

Initial temperature of water = 10°C

Final temperature of water = 50°C

Energy absorbed = 286 J

Mass of water = ?

Solution:

Specific heat capacity:

It is the amount of heat required to raise the temperature of one gram of substance by one degree.

Specific heat capacity of water is 4.18 J/g.°C

Formula:

Q = m.c. ΔT

Q = amount of heat absorbed or released

m = mass of given substance

c = specific heat capacity of substance

ΔT = change in temperature

ΔT =  50°C -  10°C

ΔT = 40°C

by putting  values,

286 J = m × 4.18 J/g.°C × 40°C

286 J = m × 167.2 J/g

m = 286 J / 167.2 J/g

m = 1.71 g

10,000 lbm/hr is the mass flow rate of the stream as a whole. Benzene (C6H6) and toluene are two organic substances that enter a separation column (C7H8).

The correct option is d.

In order to make polystyrene, benzene, a colorless liquid with a distinct odor, is primarily used. It is incredibly toxic, a known carcinogen, and leukemia has been related to exposure to it.

Benzene is a typical chemical used in industry.

internal combustion engines are fuelled by a derived mixture of highly combustible liquid hydrocarbons. The vast bulk of gasoline is used in automobile engines. infrastructure for blending as well as refining petroleum products.

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The balanced equation for the reaction of iron with water that results in the production of iron oxide and hydrogen gas is

3 Fe (s) + 4H₂O (g) → Fe₃O₄ (s) + 4H₂ (g)

Iron does not react directly with liquid water but react with water vapour. When the reaction happens, it results in the formation of a solid and a gas. The products of the reaction are Iron oxide and hydrogen. The equation of the reaction would be

Fe (s) + H₂O (g) → Fe₃O₄ (s) + H₂ (g)

Now, we need to balance the equation. On the right-hand side, we have 3 Fe, 4 O and 2 H. Similarly on the left-hand side there are 1 Fe, 1 O and 2 H.

To balance the equation, we add 3 to Fe, 4 to H₂0 and 4 to H₂.

As a result, the balanced chemical equation for the reaction would be

3 Fe (s) + 4H₂O (g) → Fe₃O₄ (s) + 4H₂ (g)

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Gasoline; float,  Water; float, Honey; neither sink nor float (suspended) and Titanium; sink.

To determine whether each substance will sink or float in corn syrup, we need to compare the density of each substance with the density of corn syrup, which is 1.36 g/cm³. If the density of a substance is greater than the density of corn syrup, it will sink. If the density of a substance is less than the density of corn syrup, it will float.

Gasoline has a density of about 0.68 g/cm³, which is less than the density of corn syrup. Therefore, gasoline will float in corn syrup.

Water has a density of 1 g/cm³, which is less than the density of corn syrup. Therefore, water will float in the corn syrup.

Honey has a density of about 1.36 g/cm³, which is equal to the density of corn syrup. Therefore, honey will neither sink nor float in corn syrup. It will stay suspended in middle.

Titanium has a density of about 4.51 g/cm³, which is greater than the density of corn syrup. Therefore, titanium will sink in corn syrup.

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Answer:

those things that looks like cristals

Answer:

Explanation:

They all seem right to me but if i had to pick i would pick B

Answer/Explanation:

The instinct to respond if they are in danger is beneficial to an animals' survival. Normally young doesn't know how to hunt nor what to hunt. But, all young can know that something is wrong this is called fear. Fear is a natural instinct that is both normal and learned. Fear protects something from going into a bad situation.

Atp links endergonic and exergonic reactions.

In chemical thermodynamics, an exergonic reaction is a chemical reaction where the amendment in the free energy is negative (there may be an internet unleash of free energy).

This indicates a spontaneous reaction if the system is closed and initial and final temperatures are the same. For processes that crop up in a very closed system at constant pressure and temperature, Gibbs free energy is used,

whereas the Helmholtz energy is relevant for processes that take place at constant volume and temperature. associate degree reaction occurring at a constant temperature while not the input of electrical or gauge boson energy is exergonic, in step with the second law of thermodynamics. An example is a cellular respiration

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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 :)

The new pressure is 1.47 atm.

The force delivered to a surface per unit area is measured as pressure. In the SI system, it is measured in terms of N/m2 (Pascals) and is defined as the force per unit area. A weight placed on a surface, the expansion of a gas, or a change in the height of a liquid column are just a few examples of how pressure can be produced.

The ideal gas law can be used to determine the new pressure. The Ideal Gas Law can be found in:

PV = nRT

where n is the number of moles, R is the gas constant, P is the pressure, V is the volume, T is the temperature (in kelvin).

We can assume that the product of nRT is constant because the temperature is constant. Consequently, we can write:

P1V1 = P2V2

where P1 denotes the starting pressure, V1 the starting volume, and P2 the ending pressure, V2 the ending volume.

If we substitute the values provided, we get:

P1 = 1.7 atm

V1 is 710 mL (0.71 L), and V2 is 810 mL (0.81 L).

So, P2 = P1*V1/V2, which is 1.7 atm * 0.71 L/0.81 L, or 1.47 atm.

Consequently, the new pressure is 1.47 atm.

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Answer:

i. If the area is doubled keeping the force constant, then pressure will be halved.

ii. If force is doubled keeping area constant, then pressure will also be doubled.

I hope that my answer helped you!!

-From Nepal

The concentration of original HydroChloric Acid or HCl we say, would be 0.102 M in the starting of Titration.

As the Acid-Base reacts to form water and salts this is an acid-base neutralization displacement reaction.

The reaction goes like :

NaOH + HCl ==> H2O + NaCl

As the reaction shows, that one mole of NaOH reacts with one mole of HCl which means these species react mole to mole and form one mole of Water and one mole of Salt.

Since we're titrating 24.16 ml of 0.106 M NaOH with 25 ml of HCl, the equation balances for 1 : 1 so, we can calculate the concentration of HCl using the following equation :

\(M_{NaOH} * V_{NaOH} = M_{HCl} * V_{HCl}\)

24.16 * 0.106 = x * 25

=> x = 0.102 M

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Answer: temperature

Explanation:

If the property of a sample of matter does not depend on the amount of matter present, it is an intensive property. Temperature is an example of an intensive property.

B. Temperature is an intensive  property of a sample of iron(II)  oxide

First let's understand what does intensive and extensive properties signify?

Extensive property:

Intensive property:

Look at all the options one by one:

A. This option is incorrect, mass is an extensive property.

B. This option is correct, temperature is an intensive property since it does not depend on the amount of substance.

C. This option is incorrect, volume is an extensive property.

D. This option is incorrect, heat capacity is an extensive property.

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Quality single-case research designs should have a minimum of three demonstrations of effect.

Single-case research design (SCRD) is a research method that involves studying the behavior of a single participant. SCRD has several unique features that distinguish it from other types of research, and the design is suited for studying behavior in its natural context.

Quality SCRDs should have at least three demonstrations of effect (i.e., changes in the behavior of interest that are reliably linked to a specific intervention) in order to support causal inferences.

Each demonstration of effect must be replicated and analyzed statistically, and the demonstrations of effect must be separated by a return to baseline or another experimental condition that permits the investigator to demonstrate that the change in the behavior of interest is attributable to the intervention and not to extraneous factors.

SCRD is a powerful and flexible research technique that can be used to study behavior in a variety of settings and populations.

The application of SCRD can lead to a better understanding of the causes and maintenance of behavior and can guide the development of effective interventions for individuals with behavioral difficulties.

Hence, Quality single-case research designs should have a minimum of three demonstrations of effect.

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To calculate the total masses of the products for the given chemical equation, we need to balance the equation first. Balancing the equation means making sure that the number of atoms of each element is the same on both the reactant and product sides of the equation.

The balanced equation for the given reaction is:

2SeO2(g) + O2(g) → 2SeO3(g)

From the balanced equation, we can see that two moles of SeO2 react with one mole of O2 to produce two moles of SeO3. To calculate the total mass of the products, we need to use the molar masses of SeO3 and O2. The molar mass of SeO3 is 143.97 g/mol, and the molar mass of O2 is 32.00 g/mol.

Using the equation, we know that two moles of SeO3 are produced for every one mole of O2. Therefore, the total mass of SeO3 produced can be calculated as follows:

2 mol SeO3 x 143.97 g/mol = 287.94 g SeO3

The total mass of O2 consumed can be calculated as follows:

1 mol O2 x 32.00 g/mol = 32.00 g O2

Therefore, the total mass of the products is 287.94 g SeO3 and 32.00 g O2.

The total mass of the products for the given equation is 287.94 g.

To calculate the total masses of the products for the given equation, we need to first balance the equation:

2SeO2(g) + O2(g) → 2SeO3(g)

Now, we can use the balanced equation to determine the total masses of the products. The molar mass of SeO3 is 143.97 g/mol.

2 moles of SeO3 is produced for every 1 mole of O2 consumed. Therefore, if we know the mass of O2 consumed, we can calculate the mass of SeO3 produced.

Assuming we have 1 mole of SeO2, which has a molar mass of 110.96 g/mol, and we consume 1 mole of O2, which has a molar mass of 32 g/mol, the total mass of the products would be:

2 moles of SeO3 x 143.97 g/mol = 287.94 g

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The number of air molecules in a volume of 1.00 cm3 under the conditions of the vacuum pump is 3.65 * 10-15 moles and those that would be present at the same temperature but at 1.00 atm would be 0, 04 moles

The vacuum pump is a device that extracts gas molecules from a sealed volume, to create a partial vacuum, and is frequently used in industry, especially food.

To perform both calculations considering air as an ideal gas, the equation PV = nrt is used, in which

P = Pressure

V = Volume

n = number of moles

R = Gas constant

t = temperature

Data

t = 300K

V = 1L

P = 9.00 * 10-14 atm

R = 0.082 L Atm / mol °K .

n = ?

PV = nrt

n = PV/rt

n = 9.00 * 10-14. 1 / 0.082 . 300

n = 9.00 * 10-14 / 24.6

n = 3.65 * 10-15 moles

Data

t = 300K

V = 1L

P = 1 atm

R = 0.082 L Atm / mol °K .

n = ?

PV = nrt

n = PV/rt

n=1. 1 / 0.082 . 300

n = 1 / 24.6

n = 0.04 mole

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At rest, K+ concentrations are higher inside neurons. K+ has the propensity to migrate out of the neuron down the concentration gradient because it can freely pass the neuronal membrane.

The inside of the cell contains more potassium ions than the outside does. The system as a whole is electrically neutral because an anion balances out each potassium ion (on either side of the membrane). As a result, there is a high concentration of sodium ions outside the cell and a high concentration of potassium ions inside. Additionally, the neuronal membrane contains specialized proteins known as channels that create gaps in the membrane that are only permeable to certain ions.

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Answer:

Explanation: If the water vapor content stays the same and the temperature drops, the relative humidity increases. If the water vapor content stays the same and the temperature rises, the relative humidity decreases. This is because colder air doesn't require as much moisture to become saturated as warmer air.

Answer:

B

Explanation:

Conductors are able to conduct electricity and temperature. Most of the metals, metalloids and alloys are conducting. Like iron (Fe) nickel is a good conductor.

Conductivity is a physical property of substances indicates the ability to conduct heat and electricity. Substances like metals are conductors because of the presence of free electrons in them.

The flow of free electrons in solids make the substance conducting. Substances which does not conduct is called insulators and those which conduct partially is called semiconductors.

Gases and liquids with fewer electrons are not conducting. Thus bromine is not a conductor. Krypton is a noble gas and is not conducting, potassium does not conduct electricity but it is thermally conducting.

Hence nickel (Ni) is the element having similar conductivity of iron. Thus option B is correct.

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True.

The Mass Undergoes change only in ( Solid state to liquid state ) Ice Cube to Water .

Mass changes from mg to litre.

\(\huge\mathfrak\red{hope \: it \: helps}\)

C/ If Fe is greater than Fg, the negatively charged oil droplet will move freely toward the negatively charged plate.

In the Millikan oil droplet experiment, the negatively charged oil droplets are subjected to an electric field created by the charged plates. The electric force (Fe) acts on the oil droplet in a direction opposite to the gravitational force (Fg). When Fe is greater than Fg, the electric force overcomes the gravitational force, causing the negatively charged oil droplet to experience an upward force. As a result, the oil droplet moves freely upward toward the negatively charged plate.

Option B is incorrect because if Fe is equal to Fg, the forces balance each other, resulting in a stationary droplet. However, the question states that Fe is increased until it is greater than Fg, implying that the droplet is no longer stationary but moves in response to the electric force.

Therefore, option C is the correct answer, as it describes the effect of an electric field on the motion of a negatively charged oil droplet in the Millikan oil droplet experiment.

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Net charge

(a) histidine 0, +2, 0, -1

(b) leucine 0,

(c) aspartic acid 0

(d) tyrosine 0

(e) asparagine 0

What is ph ?

The hydrogen ion concentration is measured using the pH scale. The pH values, which range from 0 to 14, are assigned to it. Therefore, we may say that the pH value is a number that represents how acidic or basic a solution is.

A solution with a pH below 7 is referred to as acidic, and one with a pH over 7 is referred to as basic, or alkaline.

Thus, histidine has a net charge of 0 at ph 1, of 2 at ph 4 of 0 again at ph 8 and finally of -1 at ph 12.

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Answer:

More mass means more force is needed to achieve the same change in speed in the same amount of time. That force is transmitted from the road, to the tires, to the wheels, through the brakes, to the frame and rider.

The weight on a bicycle affects the force required to accelerate it as it increases inertia it will slow down its rate of acceleration.

Acceleration is defined as the rate of change of velocity of an object with respect to time. These are vector quantities which have magnitude as well as direction.

The orientation of the acceleration of an object as given by the orientation of the net force acting on that object. It is expressed as:

\(\overline{a} = \frac{v - v_0}{t} = \frac{\Delta v}{\Delta t}\overline{a} = average acceleration\\v = final velocity\\v_0 = starting velocity\\t = elapsed time\)

Acceleration is proportional to the force applied, so the greater the force, the greater the speed of the object in the direction of the force. Mass is inertia, which is the reluctance to accelerate, so for the same force, more massive objects experience smaller acceleration than less massive objects.

Thus, the weight on a bicycle affects the force required to accelerate it as it increases inertia it will slow down its rate of acceleration.

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It can be assumed that it is within the acceptable range for domestic use. Rapid temperature changes or high temperatures can also cause damage to pipes and fittings.

Task 3a: Discuss the significance of the measured water parameters collected from Hardap Dam for aquatic life.Water parameters are chemical, biological and physical characteristics of the water. They are important indicators of the quality of water. Hardap Dam is a habitat for a variety of aquatic life such as fish, birds, plants and insects. The measured water parameters for different depths include oxygen, pH and temperature.The concentration of oxygen in the water is crucial to aquatic life. Oxygen is required for respiration by aquatic animals. The surface oxygen concentration of 7.5 mg/L measured in Hardap Dam is adequate for most aquatic life. However, some fish species require higher concentrations of dissolved oxygen to survive. As water depth increases, the oxygen concentration decreases.

This can be seen in the decreasing oxygen concentration at depths below the surface. Low oxygen concentration can lead to suffocation of aquatic life, changes in species composition and nutrient cycling.PH is a measure of the acidity or alkalinity of water. Aquatic life requires a pH range of 6.5-9.0 to survive. The pH of 7.9 measured at the surface of Hardap Dam indicates that the water is slightly alkaline. The pH values for the deeper water layers were not provided but it can be assumed that they are likely to be similar. Extreme pH values can lead to stress and death of aquatic organisms.Temperature is an important parameter that influences the metabolic rates of aquatic organisms. Temperature affects the solubility of oxygen and other gases in water. It also determines the rate of biochemical reactions in organisms. The temperature of the water at the surface of Hardap Dam was not provided.

However, it can be assumed that it is within the range of tolerance for most aquatic organisms.

As water depth increases, temperature decreases. Rapid temperature changes or high temperatures can cause stress and death in aquatic organisms. Task 3b: Evaluate the significance of the measured water parameters in relation to the use of Hardap Dam water for domestic purposes.Water is a critical resource for human survival. Hardap Dam supplies water to communities for domestic purposes. The water quality is important to prevent the spread of diseases and illness. The measured water parameters for different depths of the dam include oxygen, pH and temperature.

These parameters affect the suitability of the water for domestic use.Oxygen concentration in the water is important for the removal of pollutants and odours. The surface oxygen concentration of 7.5 mg/L measured in Hardap Dam is adequate for this purpose. As the water depth increases, oxygen concentration decreases. Low oxygen concentration can lead to unpleasant tastes and odours in the water.PH is important for the taste and aesthetics of water. The pH of 7.9 measured at the surface of Hardap Dam is within the acceptable range for domestic use. Extreme pH values can cause water to taste bitter or metallic.

Changes in pH can also affect the corrosion of pipes and fittings.Temperature can affect the growth of microorganisms in the water. High temperatures can promote the growth of harmful bacteria such as E. coli. The temperature of the water at the surface of Hardap Dam was not provided. However, it can be assumed that it is within the acceptable range for domestic use. Rapid temperature changes or high temperatures can also cause damage to pipes and fittings.

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Answer:

citric acid us found in juice of of lemon.

vinegar contains acetic acid.

hope this helps you.

Answer:

The atoms can only combine in fixed ratios, and they can only be separated by a chemical change.

Explanation:

A compound is where two or more elements are chemically joined. This means that the atoms lose its individuals properties and have different properties from the elements it is combined with. Salt and sugar are simple examples of this.

Once chemically joined, a compound cannot be physically separated like picking off raisin off a raisin cookie. It must be separated through another chemical change.

There is also a fixed ratio that atoms combine due to the nature of electrons and individual elemental properties.

The relationship between process capability index, Cp and process capability ratio, Cr is given as Cp = 1/Cr.

In statistics, process capability index is used to measure the variations or changes that occur in a process.

In general, the it lies between the specification limits which are also held in check while performing the Process capability index.

As we know that different processes has different optimal situations which help us to contrast the processes and also help us to identify if the obtained results meet our expectations.

Simply put, Process capability index also called process capability ratio is a statistical measurement method to identify the possible variations in a process.

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The volume of CO2 produced from the combustion reaction is 93.73 L at STP.

The balanced combustion reaction of C3H8 with excess oxygen is shown below. Due to the presence of excess oxygen, it is assumed that the reaction would achieve complete combustion. This means that there would be no CO (carbon monoxide) present in the product.

C3H8 + 5O2 → 3CO2 +4H2O

The amount of carbon dioxide can be determined through the use of a stoichiometric ratio with the limiting reactant, C3H8.

To convert the mass of C3H8 to moles, the equation below is used. (Molar mass of C3H8= 44.097 g/mol)

Moles of C3H8= Mass of C3H8 / molar mass of C3H8

Moles of C3H8= 61.5 g / 44.097 g/mol

Moles of C3H8= 1.39465 mol

Then, determine the number of moles of CO2 produced. Every mole of C3H8 reacted produces 3 moles of CO2.

Moles of CO2 = Mole C3H8 * ( 3 mol CO2 / 1 mol C3H8)

Moles of CO2= 4.18396 mol

Lastly, the ideal gas equation, shown below, can be used to calculate the volume of CO2 at STP. The conditions at STP are 1 atm pressure and 273K temperature. (Gas constant=0.082057 L-atm/K-mol)

(Pressure)(Volume)=(number of moles)(gas constant)(temperature)

Volume= [(4.18396 mol)( 0.082057 L-atm/K-mol)(273 K)]/ 1 atm

Volume=93.727 L

The volume of CO2 produced can also be identified by multiplying the number of moles by 22.4016 L/mol, which is the value of volume/number of moles in STP.

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