Describe the process of ipm as an environmental solution
Answer:
IPM is also known as Integrated Pest management.
IPM is an ecosystem-based strategy that deals with long-term prevention of pests or their damage through a combination of techniques such as biological control, habitat manipulation, modification of cultural practices, and use of resistant varieties.
These factors are very important in protecting the environment and it prevents some crops and animals from going into extinction.
The process of IPM involves prevention, monitoring and intervening as an environmental solution.
What is IPM stands for?IPM stands for 'Integrated Pest management', it is an ecosystem-based strategy.
IPM works on three main aspects and that are:
Prevent: In this phase they prevent the crops from the build-up pests.Monitor: In this phase they monitor the crop, to carry out natural control mechanism for pests.Intervene: In this phase they take some control steps when needed by determining the most appropriate cost effectively and environmental friendly scheme. They done this by physical, chemical or biologically and prevents some crops and animals from going into extinction.Hence, the process of IPM raised out as an environmental solution.
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In 1911, Ernest Rutherford tested the atomic model existing at the time by shooting a beam of alpha particles (42He, helium nuclei) at a very thin sheet of gold foil. He found that while most particles went straight through the foil undeflected, a very few were deflected at great angles as they passed through the foil. Why was this discovery a reason to change the atomic model
Answer:
At the time of Rutherford's experiment, the accepted model for the atom was the Thomson plum-pudding model of the atom, in which the atom consists of a "sphere" of positive charge distributed all over the sphere, with tiny negative particles (the electrons) inside this sphere.
In his experiment, Rutherford shot alpha particles towards a very thin sheet of gold foil. He observed the following things:
1- Most of the alpha particles went undeflected, but
2- Some of them were scattered at very large angles
3- A few of them were even reflected back to their original directions
Observations 2) and 3) were incompatible with Thomson model of the atom: in fact, if this model was true, all the alpha particle should have gone undeflected, or scattered at very small angles. Instead, due to observations 2) and 3), it was clear that:
- The positive charge of the atom was all concentred in a tiny nucleus
- Most of the mass of the atom was also concentrated in the nucleus
So, Rutherford experiment lead to a change in the atomic model of the atom, as it was clear that the plum-pudding model was no longer adequate to describe the results of Rutherford's experiment.
Final answer:
Rutherford's gold foil experiment disproved the plum pudding model by showing that alpha particles were deflected by a dense nucleus within the atom. This discovery led to a new atomic model where a central nucleus is orbited by electrons.
Explanation:
In 1911, Ernest Rutherford's gold foil experiment challenged the then-accepted plum pudding model of the atom. The plum pudding model hypothesized that an atom's mass and charge were uniformly distributed throughout the atom. This model suggested that alpha particles, which are helium nuclei, would pass through a gold foil with little or no deflection. However, Rutherford's experiment revealed that while most particles passed through the foil, a small percentage (approximately 1 in 8000) were deflected at large angles, and some even bounced back toward the source. This suggested that the atom's mass and positive charge were not evenly distributed, but rather concentrated in a small, central nucleus, leading to the development of the nuclear model of the atom.
Rutherford's findings fundamentally altered the scientific understanding of the atomic structure. The dramatic deflections and backscatterings indicated the existence of a compact, positively-charged atomic nucleus, around which the electrons orbited. This discovery was instrumental in moving away from the plum pudding model to one that reflected the modern view of the atom, where a dense nucleus contains most of the atom's mass and positive charge, with electrons residing in the surrounding empty space.
Determine the molarity of a solution formed by dissolving 468 mg of mgi2 in enough water to yield 50.0 ml of solution.
Answer : The molarity of a solution is, 0.0337 M
Explanation : Given,
Mass of [tex]MgI_2[/tex] = 468 mg = 0.468 g (1 mg = 0.001 g)
Volume of solution = 50.0 mL
Molar mass of [tex]MgI_2[/tex] = 278 g/mole
Molarity : It is defined as the number of moles of solute present in one liter of volume of solution.
Formula used :
[tex]\text{Molarity}=\frac{\text{Mass of }MgI_2\times 1000}{\text{Molar mass of }MgI_2\times \text{Volume of solution (in mL)}}[/tex]
Now put all the given values in this formula, we get:
[tex]\text{Molarity}=\frac{0.468g\times 1000}{278g/mole\times 50.0mL}=0.0337mole/L=0.0337M[/tex]
Therefore, the molarity of a solution is, 0.0337 M
The molarity of the solution formed is 0.0337 M
From the question,
We are to determine the molarity of the solution formed.
First, we will determine the number of moles MgI₂ dissolved
Mass of MgI₂ dissolved = 468 mg = 0.468 g
From the formula
[tex]Number\ of\ moles = \frac{Mass}{Molar\ mass}[/tex]
Molar mass of MgI₂ = 278.1139 g/mol
∴ Number of moles of MgI₂ present = [tex]\frac{0.468}{278.1139}[/tex]
Number of moles of MgI₂ present = 0.001682764 mole
Now,
For the molarity of the solution formed,
Using the formula
[tex]Molarity = \frac{Number\ of\ moles}{Volume}[/tex]
Volume of the solution = 50.0 mL = 0.050 L
∴ Molarity of the solution = [tex]\frac{0.001682764}{0.050}[/tex]
Molarity of the solution = 0.033655
Molarity of the solution ≅ 0.0337 M
Hence, the molarity of the solution formed is 0.0337 M
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which of the following will end it’s life cycle as a black hole
Answer:hope we can be friends
can i please get brainliest
Imagine an enormous cloud of gas and dust many light-years across. Gravity, as it always does, tries to pull the materials together. A few grains of dust collect a few more, then a few more, then more still. Eventually, enough gas and dust has been collected into a giant ball that, at the center of the ball, the temperature (from all the gas and dust bumping into each other under the great pressure of the surrounding material) reaches 15 million degrees or so. A wondrous event occurs.... nuclear fusion begins and the ball of gas and dust starts to glow. A new star has begun its life in our Universe. So what is this magical thing called "nuclear fusion" and why does it start happening inside the ball of gas and dust? It happens like this..... As the contraction of the gas and dust progresses and the temperature reaches 15 million degrees or so, the pressure at the center of the ball becomes enormous. The electrons are stripped off of their parent atoms, creating a plasma. The contraction continues and the nuclei in the plasma start moving faster and faster. Eventually, they approach each other so fast that they overcome the electrical repulsion that exists between their protons. The nuclei crash into each other so hard that they stick together, or fuse. In doing so, they give off a great deal of energy. This energy from fusion pours out from the core, setting up an outward pressure in the gas around it that balances the inward pull of gravity.
Explanation:
200.0 mL OF A 5.10 M solution are diluted to 500.0 mL. What is the concentration of the resulting solution? *
Answer:
Concentration of the resulting solution = 2.04 M
Explanation:
Data:
M1 = 5.10 M
V1 = 200.0 mL
V2 = 500.0 mL
M2 = ?
By modifying the volume of solution, keeping the amount of solute constant, the concentration changes. To perform the calculations, the equation will be:
[tex]M1*V1=M2*V2[/tex]
Where M1 is the initial concentration of the solution, M2 the final concentration and V is the value of the volumes of the initial and final solution.
Clearing the value of M2 from the equation and replacing the values we have:
[tex]M2=\frac{M1*V1}{V2} =\frac{5.10M*200mL}{500mL} =2.04M[/tex]
Answer:
2.04M
Explanation:
Using C1V1 = C2V2
where;
C1 = Concentration of stock solution = 5.10M
C2 = Final concentration of new solution = x
V1 = Volume of stock solution = 200ml
V2 = Final volume of new solution = 500ml
Inserting the values into the formulae, we have;
5.10 * 200 = x * 500
x = (5.10 * 200) / 500
x = 2.04M
What is the source of heat for the Earth? *
ozone
wind
sun
water
Answer:
plz mark as brainliest
Explanation:
OZONE
Earth keeps a nearly steady temperature, because it makes heat in its interior. In other words, Earth has been losing heat since it formed, billions of years ago. But it’s producing almost as much heat as it’s losing. The process by which Earth makes heat is called radioactive decay.
Reaccionan 54gr de Nitrato de plata al 39 % de pureza, con 72gr de ácido clorhídrico al 83% de pureza, en un proceso donde se obtienen 93 gr de cloruro de plata. El otro producto es el ácido nítrico: Calcular el porcentaje de rendimiento de la reacción y balancear
Answer:
what is the English translation, id like to help
Explanation:
At 700 K the equilibrium constant KC for the reaction between NO(g) and O2(g) forming NO2(g) is 8.7 × 106. The rate constant for the reverse reaction at this temperature is 0.54 M–1s–1. What is the value of the rate constant for the forward reaction at 700 K?
Answer : The value of the rate constant for the forward reaction at 700 K is, [tex]4.70\times 10^6[/tex]
Explanation :
The given chemical equilibrium reaction is:
[tex]NO(g)+O_2(g)\rightleftharpoons NO_2(g)[/tex]
The expression for equilibrium constant is:
[tex]K_c=\frac{[NO_2]}{[NO][O_2]}[/tex]
The expression for rate of forward and backward reaction is:
[tex]R_f=K_f[NO][O_2][/tex]
and,
[tex]R_b=K_b[NO_2][/tex]
As we know that at equilibrium rate of forward reaction is equal to rate of backward reaction.
[tex]R_f=R_b[/tex]
[tex]K_f[NO][O_2]=K_b[NO_2][/tex]
[tex]\frac{K_f}{K_b}=\frac{[NO_2]}{[NO][O_2]}[/tex]
[tex]\frac{K_f}{K_b}=K_c[/tex]
Given:
[tex]K_c=8.7\times 10^6[/tex]
[tex]K_b=0.54M^{-1}s^{-1}[/tex]
Now put all the given values in the above expression we get:
[tex]\frac{K_f}{K_b}=K_c[/tex]
[tex]\frac{K_f}{0.54}=8.7\times 10^6[/tex]
[tex]K_f=4.70\times 10^6[/tex]
Therefore, the value of the rate constant for the forward reaction at 700 K is, [tex]4.70\times 10^6[/tex]
Final answer:
The rate constant for the forward reaction of NO with O2 forming NO2 at 700 K, given the equilibrium constant and the reverse reaction rate, is calculated to be 4.698 × 10^6 M⁻¹s⁻¹.
Explanation:
The question asks for the rate constant for the forward reaction of NO(g) reacting with O₂(g) to form NO₂(g) at 700 K, given the equilibrium constant (KC) and the rate constant for the reverse reaction. To find the rate constant for the forward reaction (kf), we use the relationship between the equilibrium constant and the rate constants of the forward and reverse reactions, which is KC = kf / kr. Given KC = 8.7 × 106 and the reverse rate constant (kr = 0.54 M⁻¹s⁻¹), we can rearrange the formula to solve for kf: kf = KC × kr. Substituting the given values yields kf = 8.7 × 106 × 0.54 M⁻¹s⁻¹ = 4.698 × 106 M⁻¹s⁻¹.
A marshmallow has an initial volume of 0.084 L at standard pressure (1.0 atm). If the marshmallow is placed in a vacuum chamber and the final volume is 0.785L, what is the pressure inside the chamber?
Answer:
The new pressure on the gas P2 = 0.10atm
Explanation:
Data;
V1 = 0.084L
P1 = 1.0atm
V2 = 0.785L
P2 = ?
This question is a practical problem where Boyle's law is applied.
According to Boyle's law, the pressure of a fixed mass of gas is inversely proportional to its volume provided that the temperature on the gas remains constant
Mathematically
P = k / v, k = PV
P1*V1 = P2*V2 = P3*V3..........Pn*Vn
P1 * V1 = P2 * V2
Solving for P2,
P2 = (P1 * V1 ) / V2
P2 = (0.084 * 1) / (0.785)
P2 = 0.10atm
The new pressure of the gas is 0.10atm
Final answer:
Using Boyle's Law, we can determine that the pressure inside the vacuum chamber is approximately 0.107 atm when a marshmallow expands from 0.084 L to 0.785 L at constant temperature.
Explanation:
To determine the pressure inside the vacuum chamber where a marshmallow has expanded from 0.084 L to 0.785 L at constant temperature, we can use the gas laws. According to Boyle's Law, at constant temperature for a given mass, the volume of a gas is inversely proportional to the pressure. The formula for Boyle's Law is P1V1 = P2V2, where P denotes pressure and V denotes volume. Using this law, we calculate as follows:
P1V1 = P2V2
1.0 atm × 0.084 L = P2 × 0.785 L
P2 = (1.0 atm × 0.084 L) / 0.785 L
P2 = 0.084 atm / 0.785
P2 = 0.107 atm
Thus, the pressure inside the vacuum chamber is approximately 0.107 atm when the volume of the marshmallow is 0.785 L.
A sample of gas is held at 100oc at a volume of 20 L.if the volume is increased to 40 L what is the new temperature of the gas in celcius.
Answer:
The new temperature of the gas is 200 Celsius degrees.
Explanation:
Charles's Law consists of the relationship between the volume and temperature of a certain amount of ideal gas, which is maintained at a constant pressure, by means of a proportionality constant that is applied directly.
In this way, Charles's law is a law that says that the quotient that exists between volume and temperature will always have the same value:
[tex]\frac{V}{T} =k[/tex]
Assuming you have a certain volume of gas V1 that is at a temperature T1 at the beginning of the experiment, if you vary the volume of gas to a new value V2, then the temperature will change to T2, and it will hold:
[tex]\frac{V1}{T1} =\frac{V2}{T2}[/tex]
In this case:
V1= 20 LT1= 100 °CV2= 40 LT2= ?Replacing:
[tex]\frac{20}{100} =\frac{40}{T2}[/tex]
Solving:
[tex]T2=\frac{40}{\frac{20}{100} }[/tex]
T2=200 °C
The new temperature of the gas is 200 Celsius degrees.
Answer:
473°C
Explanation:
We'll begin by analysing what was given from the question. This is illustrated below:
Initial temperature (T1) = 100°C
Initial volume (V1) = 20 L
Final volume (V2) = 40 L
Final temperature (T2) =?
Next, we shall be converting the temperature in celsius to Kelvin temperature. This is illustrated below:
Temperature (Kelvin) = temperature (celsius) + 273
Initial temperature (T1) = 100°C = 100°C + 273 = 373K
Next, we shall obtain the new temperature by applying the Charles' law equation. This is illustrated below:
V1/T1 = V2/T2
20/373 = 40/T2
Cross multiply to express in linear form
20 x T2 = 373 x 40
Divide both side by 20
T2 = (373 x 40) /20
T2 = 746K
Next, we shall be converting the new temperature obtained from Kelvin to celsius temperature. This is illustrated below:
Temperature (celsius) = Temperature (Kelvin) - 273
Temperature (celsius) = 746K - 273
Temperature (celsius) = 473°C
How might a lack of sunlight disrupt the food web?
Producers would die, and if producers died, consumers would die too. ... food chains show energy being transferred and food webs show organisms linked to each other.
Which describes isotopes? Check all that apply.
Final answer:
Isotopes are versions of an element with the same number of protons but different numbers of neutrons, such as carbon-12 and carbon-14. To find the number of protons, neutrons, and electrons in an atom, you need the atomic number and mass number. Radioactive isotopes decay to more stable forms, releasing particles and energy.
Explanation:
Isotopes are different forms of an element that have the same number of protons but a different number of neutrons. For example, whereas carbon-12 has six protons and six neutrons, carbon-14 has six protons and eight neutrons. Both isotopes of carbon have six electrons since the number of electrons is defined by the number of protons to maintain a neutral charge. Radioactive isotopes, or radioisotopes, may emit particles and energy, transforming into more stable forms and losing potential energy in the process.
To determine the number of protons, neutrons, and electrons in an atom with a given mass number, you first need to know the element's atomic number (number of protons) and mass number. The atomic number is equal to the number of protons and electrons (in a neutral atom). The number of neutrons can be found by subtracting the atomic number from the atomic mass number. For instance, carbon-14, with an atomic number of 6 and a mass number of 14, has 6 protons, 8 neutrons (14 - 6), and 6 electrons.
The volume of a gas is 10.O liters and it’s temperature is 1500 k if the temperature is decreased to 750 k what’s the new volume
Using Charles's Law, which states that the volume of a gas is directly proportional to its temperature in Kelvin with constant pressure, the new volume of gas when temperature is decreased from 1500 K to 750 K is 5.0 liters.
This question is related to the Charles's Law, which states that the volume of a gas is directly proportional to its temperature in Kelvin, assuming that the pressure and the amount of gas remain constant. To solve this problem, we can use the formula V₁/T₁= V₂/T₂ , where V₁ and V₂ are the initial and final volumes, and T₁ and T₂ are the initial and final temperatures in Kelvin, respectively.
Given: V₁ = 10.0 liters, T₁ = 1500 K, T₂ = 750 K
We are solving for V₂.
Using Charles's Law:
V₁/T₁= V₂/T₂
(10.0 L) / (1500 K) = V2 / (750 K)
V₂ = (10.0 L) / 2
V₂= 5.0 liters
The correct answer is that the new volume of the gas when the temperature is decreased to 750 K is 5.0 liters.
Given the two standard reduction potentials below what is the ksp of ag2cro4 at 25 °c
To determine the Ksp of Ag2CrO4 at 25 °C, you would first need to determine the standard reduction potentials and use the free energy equation ∆G° = -nFE°. Next, use the relationship between the equilibrium constant and ∆G° given by ∆G° = -RT ln Ksp to find the Ksp. However, without the necessary information, a precise value cannot be given.
Explanation:To find the solubility product constant (Ksp) of Ag2CrO4 at 25 °C given the provided standard reduction potentials, we would need to look at the relationship between the equilibrium constant, K, and ∆G° (standard free energy). The equation ∆G° = -RT ln K is used in these cases, where R is the gas constant, T is the temperature in Kelvin, and K is the equilibrium constant that we're interested in. Note that in order to use this equation, we first need to calculate ∆G° using the given reduction potentials and the equation ∆G° = -nFE°, where n is the number of electrons transferred, F is Faraday's constant, and E° is the standard reduction potential.
For example, if the ∆G° for the reaction came out to be around 167.9 kJ as per the details provided, and we can use ∆G° = -RT ln Ksp to find the Ksp. However, without the complete standard reduction potentials, a precise Ksp value for Ag2CrO4 at 25 °C cannot be provided here.
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someone help please!
Answer:
your answer is either c or d but probably c
A gas has a volume of 3 L at a temperature of 78 c.Find the volume of the gas at standard temperature
Answer:
The answer to your question is V2 = 2.5 l
Explanation:
Data
Volume 1 = V1 = 3 l
Temperature 1 = T1 = 78°C
Volume 2 = V2 = ?
Temperature 2 = T2 = 20°C Standard temperature = 20°C
Process
To solve this problem use Charles' law
V1/T1 = V2/T2
-Solve for V2
V2 = V1T2 / T1
1.- Convert the temperature to °K
T1 = 78 + 273 = 352°K
T2 = 20 + 273 = 293°K
2.- Substitution
V2 = (3 x 293) / 352
3.- Simplification
V2 = 879/352
4.- Result
V2 = 2.5 l
which is not an example of a vestigial structure
Answer:
the femur
Explanation:
a vestigial structure is useless, and a femur bone is not uselsess
Answer:
Pelvic bone of a snake
Explanation:
A mixture of sand and salt containig MgCl2 (100.0 g) is sprinkled on a section of pavement. The total estimated ice on the pavement is 10.0 kg. What is the freezing point of the ice (°C)? MM MgCl2 = 95.211 g/mol MM ice = 18.0148 g/mol
Answer:
-0.6⁰c
Explanation:
find the solution below
20.352 mL of chlorine under a pressure of 680. mm Hg are
placed in a container
under a pressure of 1210 mm Hg. The temperature remains
constant at 296 K.
What is the volume of the container in liters?
Answer:
0.01144L or 1.144x10^-2L
Explanation:
Data obtained from the question include:
V1 (initial volume) = 20.352 mL
P1 (initial pressure) = 680mmHg
P2 (final pressure) = 1210mmHg
V2 (final volume) =.?
Using the Boyle's law equation P1V1 = P2V2, the volume of the container can be obtained as follow:
P1V1 = P2V2
680 x 20.352 = 1210 x V2
Divide both side by 1210
V2 = (680 x 20.352)/1210
V2 = 11.44mL
Now we need to convert 11.44mL to L in order to obtain the desired result. This is illustrated below:
1000mL = 1 L
11.44mL = 11.44/1000 = 0.01144L
Therefore the volume of the container is 0.01144L or 1.144x10^-2L
Answer:
0.011437L
Explanation:
In the question, we are told that under a pressure of 680mmHg, chlorine gas occupies a volume of 20.352mL and then the pressure is changed to 1210mmHg at constant temperature.
Boyle's law states that the volume of a fixed mass of gas is directly proportional to the pressure of the gas at constant temperature.
Mathematically;
P1V1=P2V2
P1= initial pressure
V1= initial volume
P2= final pressure
V2= final volume
We will apply Boyle's law to get the new volume.
From, the relationship P1V1=P2V2
We make V2 subject of formula
V2= (P1V1)/P2
Given;
P1=680mmHg
V1=20.352mL= 20.352/1000L= 0.020352L
P2=1210mmHg
V2=(680×0.020352)/1210
V2=0.011437L
how many electrons are in a atom of zicronium
Answer:
There are 40 electrons in one atom of Zirconium.
Explanation:
Note: The word is not zicronium, it is Zirconium.
Answer:
Name Zirconium
Atomic Mass 91.224 atomic mass units
Number of Protons 40
Number of Neutrons 51
Number of Electrons 40
Explanation:
What is the pH of a 6.7 x 10^−5 M H+ solution?
Answer:
pH = 4.17
Explanation:
According to the molar concentration you stated, pH of the solution is: 4.17
Remember that pH = - log [H⁺]
and [H⁺] = 10^-pH
When:
pH > 7 → Basic solution
pH = 7 → Neutral solution
pH < 7 → Acid solution
Photochemical smog is formed when primary pollutants interact with
Answer: Sunlight.
Explanation:
Photochemical smog is formed when primary pollutants such nitrogen oxides and volatile organic compound (VOC) react with sunlight, forming a brown haze above cities.
Photochemical smog can only occur during the day.
Photochemical smog is formed when primary pollutants such as nitrogen oxides and volatile organic compounds interact with sunlight. The reaction between these pollutants in the presence of sunlight leads to the formation of smog.
Explanation:Photochemical smog is formed when primary pollutants such as nitrogen oxides (NOx) and volatile organic compounds (VOCs) interact with sunlight. These primary pollutants, which can come from sources like vehicle emissions and industrial processes, undergo chemical reactions in the presence of sunlight to produce secondary pollutants, including ozone. The reaction between NOx and VOCs in the presence of sunlight leads to the formation of photochemical smog, which appears as a brown haze above cities.
What is white light?
Answer:
A white light is apparently colourless light, for example ordinary daylight. It contains all the wavelengths of the visible spectrum at equal intensity.
Answer:
White Light is a light having a mixture of frequencies, being perceived as having no specific colour; such as sunlight.
Explanation:
help on identifying the solute and solvent
Answer:
Solute is Lithium nitrate, and solvent is water.
Explanation:
Lithium nitrate is trigonal crystal which is soluble in water.
How is the way that a wind turbine works similar to the way that a hydroelectric plant works? How is it different?
Answer: (Hydroelectric plant) gravity pushes water down pipes or canals at high pressure which forces the turbine to turn and generate electricity. In wind power (wind turbines), wind spins the turbine blades, which in turn, spins the magnet.
Explanation:
Final answer:
Wind turbines and hydroelectric plants both convert kinetic energy into electrical energy using turbines and generators. The energy source for wind turbines is moving air, whereas for hydroelectric plants it's the potential energy of water. They differ in the method of capturing and converting this energy into mechanical motion.
Explanation:
The way that a wind turbine works is similar to the way that a hydroelectric plant works in that both convert kinetic energy into electrical energy using turbines and generators. In a hydroelectric plant, water flows from a reservoir, gains kinetic energy, hits the turbine blades, and turns a shaft connected to a generator. The movement of the water thus generates electricity. Similarly, a wind turbine captures kinetic energy from the movement of air. Wind causes the rotor blades to lift and rotate, which turns a shaft also connected to a generator, producing electricity.
However, there are key differences between these two systems. The source of kinetic energy for hydroelectric plants is the potential energy of water due to gravity, while wind turbines rely on the kinetic energy of moving air, driven by solar energy and temperature differences. The methods used to convert this energy into mechanical motion of the turbines also vary, with the wind pushing against turbine blades directly and water being channeled through turbines in a more controlled environment.
In summary, both wind turbines and hydroelectric plants utilize turbines and generators to produce electricity, but the source of their energy and the specifics of their operation differ significantly.
What is the pressure of an ideal solution containing .5 moles of a nonvolatile solute and 300g of ethanol at 40C? The vapor pressure of ethanol is 134 torr at 40C
Answer:
The pressure of the solution is 144 torr
Explanation:
Step 1: Data given
Number of moles of a nonvolatile solute = 0.5 moles
Mass of ethanol = 300 grams
Molar mass of ethanol = 46.07 g/mol
Temperature = 40°C
The vapor pressure of ethanol = 134 torr
Step 2: Calculate moles ethanol
Moles ethanol = mass ethanol / molar mass ethanol
Moles ethanol = 300 grams / 46.07 g/mol
Moles ethanol = 6.51 moles
Step 3: Calculate the total moles
Total moles = 0.5 moles + 6.51 moles
Total moles = 7.01 moles
Step 4: Calculate mol fraction
Mol fraction = moles / total moles
Mol fraction ethanol = 6.51 / 7.01 moles
Mol fraction ethanol = 0.93
Mol fraction nonvolatile solute
0.5 moles / 7.01 moles = 0.07
Step 5: Calculate Total pressure of the solution
Vapor pressure ethanol = mol fraction * total pressure solution
134 torr = 0.93 * total pressure solution
Total pressure solution = 134 torr/ 0.93
Total pressure solution = 144 torr
The pressure of the solution is 144 torr
name two fluid technologies that make use of air.
Answer: an air compressor and desk chair.
Explanation:
Final answer:
Two fluid technologies that make use of air are the Bunsen burner and the atomizer, both operating based on entrainment principles to achieve proper combustion or to create a fine mist spray.
Explanation:
The use of air in fluid technologies is demonstrated through various devices that rely on fluid dynamics. Two specific technologies that utilize air are the Bunsen burner and the atomizer. The Bunsen burner uses an adjustable gas nozzle to entrain air, which is necessary for proper combustion. Atomizers employ a squeeze bulb to create a jet of air that entrains small droplets, such as drops of perfume, allowing them to be sprayed as a fine mist.
These technological applications are significant in daily practices and across several industries. The principle at work in both the Bunsen burner and atomizer is the creation of low-pressure areas through increased fluid speed, causing air to be entrained with another fluid or gas for a particular purpose.
please help!
Which statement is NOT correct?
a) In an ionic compound, a metal and a non metal form a compound, and electrons are transferred from one to the other.
b) In an ionic compound, a metal and a polyatomic ion form a compound, and electrons are shared.
c) In both ionic and molecular compounds, valence electrons take part in bonding.
d) In a molecular compound, a non-metal and a non-metal form a compound, and electrons are shared
Answer:
D is the answer
Explanation:
I'm pretty sure a molecular compound doesn't form between 2 non metals
...I think, but I can't remember
The incorrect statement is that in an ionic compound, a metal and a polyatomic ion form a compound, and electrons are shared. In ionic compounds, electrons are transferred, not shared, resulting in the formation of cations and anions.
Explanation:The statement that is NOT correct is: b) In an ionic compound, a metal and a polyatomic ion form a compound, and electrons are shared. This statement is incorrect because in an ionic compound, electrons are not shared but are transferred from the metal to the non-metal or to the polyatomic ion, forming cations and anions.
In ionic compounds, metals lose valence electrons to form positively charged ions, while nonmetals gain those electrons to form negatively charged ions, both achieving a full outer shell as per the octet rule. Covalent compounds, on the other hand, form when non-metals share electrons, producing molecular compounds.
Therefore, the correct statements are:
a) In an ionic compound, a metal and a non-metal form a compound, and electrons are transferred from one to the other.
c) In both ionic and molecular compounds, valence electrons take part in bonding.
d) In a molecular compound, a non-metal and a non-metal form a compound, and electrons are shared.
Which factors have the greatest effect on the rate of a chemical reaction between agno3 and cu
Answer:
Surface area of the reactants
Explanation:
If the reactants say Cu is in the powdered form, it reacts very quickly, otherwise the reaction will be delayed
Answer:
Surface Area and concentration
Explanation:
One of the most important factors that affect the rate of chemical reaction is the surface area of reactants. Surface area of reactants has to do with the number of particles of reactants exposed for reaction. In the reaction;
2AgNO3(aq) + Cu(s) -------> Cu(NO3)2(aq) + 2Ag(s), the most important factors affecting the rate of reaction are surface area of the solid copper metal and the concentration of the silver nitrate solution.
If copper turnings are used, the reaction will proceed faster than when a lump of copper is used. This is the effect of surface area in rate of reaction.
The higher the concentration of the solve nitrate solution, the faster the rate of reaction also. Hence the answer.
an animal which eats plants and animals is a(n)
Answer:
An Omnivore
Explanation: An omnivore is a kind of animal that eats either other animals or plants. Some omnivores will hunt and eat their food, like carnivores, eating herbivores and other omnivores. Some others are scavengers and will eat dead matter. Many will eat eggs from other animals.
Omnivores eat plants, but not all kinds of plants. Unlike herbivores, omnivores can't digest some of the substances in grains or other plants that do not produce fruit. They can eat fruits and vegetables, though. Some of the insect omnivores in this simulation are pollinators, which are very important to the life cycle of some kinds of plants.
Answer:
I know this is old but im just trying to get some points
Explanation:
The answer is an omnivore