Humid air at 100 kPa, 20°C, and 90 percent relative humidity is compressed in a steady-flow, isentropic compressor to 880 kPa. What is the relative humidity of the air at the compressor outlet? The specific heat ratio of air at room temperature is k = 1.4. Use data from the tables. Solve using appropriate software. P kPa Humid air 1 100 kPa 20°C, 90% The relative humidity at the exit is %
Answers
The relative humidity at the compressor outlet is about 122
The psychrometric chart, which shows the properties of moist air. The chart is based on the relationships between temperature, pressure, and specific humidity, which is the mass of water vapor in a unit mass of dry air.
Using the given data, we can find the initial properties of the air from the chart:
At 100 kPa and 20°C, the specific humidity of the air is about 0.009 kg/kg.
At 90% relative humidity, the dew point temperature of the air is about 18°C.
Next, we can use the isentropic compression process to find the final properties of the air:
Since the compression is isentropic, the entropy of the air remains constant during the process.
From the definition of entropy, we know that the entropy of the air is proportional to its specific volume raised to the power of the specific heat ratio k.
Therefore, if we know the specific volume of the air at the initial and final states, we can use the specific heat ratio to find the ratio of the specific volumes.
From the tables, we can find that the specific volume of the air at 100 kPa and 20°C is about 0.877 m3/kg.
To find the specific volume at 880 kPa, we can use the ideal gas law with a constant specific heat:
v2 = (R T2) / P2
= (R T1) / (P1 (P2 / P1)^(1/k))
= v1 / (P2 / P1)^(1/k)
where
R = 287 J/kg-K is the gas constant for air
T1 = 20°C + 273.15 = 293.15 K is the initial temperature
P1 = 100 kPa is the initial pressure
P2 = 880 kPa is the final pressure
k = 1.4 is the specific heat ratio
v1 = 0.877 m3/kg is the initial specific volume
Plugging in the numbers, we get:
v2 = 0.877 / (880 / 100)^(1/1.4)
= 0.240 m3/kg
Now we can use the chart again to find the final properties of the air:
At 880 kPa and 20°C, the specific volume of the air is about 0.240 m3/kg.
We can follow the constant-enthalpy line on the chart from the initial state until we reach the final specific volume.
The intersection of the constant-enthalpy line and the final specific volume line gives us the final state of the air.
We can read off the final specific humidity and dew point temperature from the chart.
Using the chart, we find that the final specific humidity is about 0.028 kg/kg, and the dew point temperature is about 29°C.
Finally, we can use the definition of relative humidity to find the relative humidity at the compressor outlet:
RH2 = (W2 / Ws(T2)) * 100%
where
W2 = 0.028 kg/kg is the final specific humidity
Ws(T2) = 0.023 kg/kg is the saturation specific humidity at 29°C
RH2 = ? is the relative humidity at the compressor outlet
Plugging in the numbers, we get:
RH2 = (0.028 / 0.023) * 100%
= 121.7%
Therefore, the relative humidity at the compressor outlet is about 122
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The relative humidity at the exit is approximately 8%.
To solve this problem, we need to use the psychrometric chart, which provides information about the properties of moist air. First, we locate the initial conditions of the air on the chart, which corresponds to a point with a temperature of 20°C, a pressure of 100 kPa, and a relative humidity of 90%. Then, we draw a straight line on the chart to represent the isentropic compression process to a final pressure of 880 kPa. Finally, we locate the final state of the air on the chart, which corresponds to a point with a temperature of approximately 118°C and a relative humidity of approximately 8%.
The decrease in relative humidity is due to the fact that as the air is compressed, its temperature increases, and its absolute humidity (mass of water vapor per unit volume of air) remains constant, which leads to a decrease in the relative humidity (ratio of the mass of water vapor in the air to the maximum mass of water vapor that the air can hold at that temperature and pressure).
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Related Questions
carboxylic acids are a type of organic compound that contains a carbon attached to both an alcohol (-oh) group and a carbonyl (
T/F
Answers
Answer:
False
Explanation:
Carboxylic acids contain the carboxyl functional group (COOH), consisting of an oxygen atom double bonded to the terminal carbon in the main carbon chain, as well as a hydroxyl (OH) functional group also bonded to the terminal carbon.
The reason that carboxylic acids contain the carboxyl functional group, and not the hydroxyl/alcohol (OH) + carbonyl (CO) groups, is because the carbonyl functional group ALWAYS exists on non-terminal carbons in the main chain, whereas on the carboxylic acid, the double bonded carbon and oxygen exists on the terminal carbon. Therefore the statement is false.
See attached image for comparison of carboxyl and carbonyl groups on organic compounds.
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Substances with a high polarity have a(low/high) surface tension ?
Answers
Answer:
I think they have high, because the nonpolar molecules usually have a much lower surface tension than polar ones.
write the chemical symbol of the element that makes up most of earth's core.
Answers
The chemical symbol for the element that makes up most of Earth's core is Fe, which stands for iron. Iron makes up approximately 85% of the Earth's core, with the remainder being nickel and other trace elements.
The high abundance of iron in the Earth's core is responsible for the planet's magnetic field, which is essential for life on Earth as it helps to protect us from harmful solar radiation. The study of the Earth's core and its composition is important for understanding the planet's history and evolution, as well as for predicting future changes in the Earth's magnetic field. The element that makes up most of Earth's core is iron. Its chemical symbol is Fe, which is derived from the Latin word "ferrum." Iron is the primary component of the inner and outer core, accounting for about 85% of its composition. This element plays a vital role in Earth's geophysics, including the generation of the planet's magnetic field.
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what is a suspension? responses homogeneous mixtures containing small particles that are likely to separate from each other when stirred rapidly homogeneous mixtures containing small particles that are likely to separate from each other when stirred rapidly homogeneous mixtures containing small particles that remain suspended when allowed to sit still homogeneous mixtures containing small particles that remain suspended when allowed to sit still heterogeneous mixtures containing large particles that are likely to separate from each other when allowed to sit still heterogeneous mixtures containing large particles that are likely to separate from each other when allowed to sit still heterogeneous mixtures containing small particles that remain suspended when allowed to sit still
Answers
Suspension is Heterogeneous mixtures containing large particles that are likely to separate from each other when allowed to sit still.
What kind of mixture is suspension?
A suspension is a combination of liquid and solid particulate matter. The particles do not disintegrate in this situation. The liquid and the particles are combined, distributing the particles evenly throughout. Within the fluid, they are "suspended."
What is Heterogeneous mixtures?
A combination is said to be heterogeneous if its composition is not constant throughout. Vegetable soup is a complex concoction. The amounts of the various veggies and other components will vary from mouthful to mouthful.
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what are four states, or phrases of matter? describe the shape and volume properties of each phase, can they change or are they fixed?
Answers
Answer:
solid liquid gas and plasma
HELP!!! DUE TONIGHT!!
10 PTS!!
the answers are given already but my teacher wants me to show work...pls help!!!
Answers
Answer:
K I will attempt
Explanation:
a)
\(O_2_{(g)}+ 2H_2_{(g)} => 2H_2O_{(l)}\\\)
b)
1 : 2 : 2 (I don't know if this is what the question wants but it is what I would answer)
c)
Hydrogen because it requires 2 moles of H2 to react with 1 mole of O2
d)
24 moles of water. Look at stoichiometric coefficient. 2:2 means 24 moles you get 24 moles
e)
Oxygen. 2 < 5/2. Remember, 1 mole of O2 requires 2 moles of H2. But 5/2 is still greater than 2
f)
First, let's find out how many moles of water we can get. Since O2 is the limiting reactant, and O2:H2O ratio is 1:2, we will get 4 moles of H2O. Then, we can multiply 4 by Avogadro's number which is \(6.022*10^{23}\) to get the number of molecules. We get: 2.41 * 10^24 molecules of water.
Answer:
I'ma just take the point thank you very much
For an ideal gas, which pairs of variables are inversely proportional to each other (if all other factors remain constant)?
1. V and T
2. T and n
3. n and V
4. P and T
A)
1 and 2 only
B)
3 and 4 only
C)
2 only
D)
1 and 3 only
E)
1, 3, and 4 only
Answers
None of the given pairs of variables are inversely proportional to each other when all other factors remain constant. Therefore, there is no correct answer among the provided options (A to E).
For an ideal gas, the variables that are inversely proportional to each other when all other factors remain constant can be determined using the ideal gas law, which is given by:
PV = nRT
Where P is pressure, V is volume, n is the number of moles of the gas, T is temperature, and R is the ideal gas constant. To find the inversely proportional pairs, we must look for relationships where one variable increases as the other decreases, while keeping the other variables constant.
1. V and T are not inversely proportional, as they are directly proportional according to the ideal gas law (V ∝ T).
2. T and n are not inversely proportional, as they are directly proportional according to the ideal gas law (T ∝ n).
3. n and V are not inversely proportional, as they are directly proportional according to the ideal gas law (n ∝ V).
4. P and T are not inversely proportional, as they are directly proportional according to the ideal gas law (P ∝ T).
None of the given pairs of variables are inversely proportional to each other when all other factors remain constant. Therefore, there is no correct answer among the provided options (A to E).
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Which property is a characteristic of an ionic compound?
low melting point
O brittle
blue
low boiling point
Answers
The option B is correct. Brittle is the characteristic of a ionic compound.
What is ionic compound?
An ionic compound is a chemical compound composed of ions held together by electrostatic forces termed ionic bonding. The compound is neutral overall, but consists of positively charged ions called cations and negatively charged ions called anions.
Also, the properties of ionic compounds are as follows: crystalline solids, and are brittle in nature, high melting and boiling points, soluble in water and conduct electricity in their solution and molten states.
Hence, from all the options, brittle is the only characteristic of ionic compound.
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11.A student titrated a diprotic weak acid (H2A) with 0.100 M NaOH. The titration required 22.58 mL of NaOH solution to reach the equivalence point. How many moles of diprotic acid were present
Answers
Moles of diprotic acid present were:
A mole of diprotic acid contains 0.0023 moles \(H_{2}A\).
Law of dilution:
Titrations are conducted using the law of dilution.
The number of moles of solute divided by the arrangement's volume in liters is known as molarity.
The number of moles per liter of solution is referred to as molarity. Additionally, we write it as M. Furthermore, we employ the following equation to determine molarity:
Molarity = moles of solute/liter of solution.
Calculation:
Moles of acid = moles of base
n = M/V
Moles of \(H_{2}A\) = Moles of NaOH used
Therefore, 0.100 x 0.02258L = 0.0023 mol \(H_{2}A\)
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a homogeneous mixture has the same composition throughout, while a heterogeneous mixture has different compositions in different regions.
Answers
This is the difference between a homogeneous and a heterogeneous mixture.
For example, salt (NaCl) and water make a homogeneous mixture (the same proportions of its components throughout any given sample), because both substances are polar.
A solution is homogeneous mixture composed of two or more substances.
In aqueous solution, a solvent is water and solute (in this example sodium chloride) is a substance dissolved in water.
A heterogeneous mixture is not uniform in composition (in this mixture different metals and minerals), but proportions of its components (for example mixture particles of different colors, small pebbles) vary throughout the sample.
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give a reason for the following questions:
A positive catalyst differs from a negative catalyst.
Answers
Positive catalyst increases the rate of the reaction by providing a shorter path to the reaction to take place while a negative catalyst decreases the rate of the reaction by providing a longer path to the reaction to take place.
What is catalyst?Catalysis can be defined as the process of increasing the rate of a chemical reaction by adding a substance known as a catalyst. Catalysts are not consumed in the reaction and remain unchanged after it.
Therefore catalysts speed up a chemical reaction by lowering the amount of energy you need to get one going. Catalysis is the backbone of many industrial processes which use chemical reactions to turn raw materials into useful products.
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For the following reactions, predict whether they will tend to be spontaneous at high, low, all temperatures, or non-spontaneous at any temperature. 2A(g) 3B(g) → C(g) D(1) AHCOV [ Select ] Spontaneous at all temperatures. Spontaneous at high temperatures A(1) B(l) —— C(I) D(s) AH> 0 Not spontaneous at any temperature Spontaneous at low temperature Als) B(I) — 2C(I) AH < 0 [ Select ] 2A(s) - B(s) C(I) ΔΗ > Ο [Select]
Answers
For the given reactions:
1. 2A(g) + 3B(g) → C(g) + D(l): If ΔH is negative (exothermic).
2. A(l) + B(l) → C(l) + D(s), ΔH > 0.
3. A(s) + B(l) → 2C(l), ΔH < 0.
4. 2A(s) - B(s) → C(l), ΔH > 0.
Based on the given reactions and their respective AH values, the predicted spontaneity at different temperatures are as follows:
- 2A(g) 3B(g) → C(g) D(1) AHCOV: This reaction is predicted to be spontaneous at all temperatures.
- A(1) B(l) —— C(I) D(s) AH > 0: This reaction is not spontaneous at any temperature.
- Als) B(I) — 2C(I) AH < 0: This reaction is predicted to be spontaneous at low temperatures.
- 2A(s) - B(s) C(I) ΔΗ > Ο: This reaction is not spontaneous, as the enthalpy change is positive.
It is important to note that these predictions are based on thermodynamic calculations and do not take into account any kinetic factors that may affect the actual rate of the reaction.
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g large radionuclides emit an alpha particle rather than other combinations of nucleons because the alpha particle has such a stable, tightly bound structure. to confirm this statement, calculate the disintegration energies for these hypothetical decay processes and discuss the meaning of your findings: (a) (b) (c) the needed atomic masses are
Answers
The disintegration energies for the given hypothetical decay processes are -10.43 MeV, 3.73 MeV, and -2.24 MeV.
The change in energy of a nucleus after it has undergone radioactive decay is known as the decay energy. The process of radioactive decay is when an unstable atomic nucleus releases radiation and ionizing particles to lose energy.
The decay energies can be easily calculated as follows,
\(Q=\Delta_mc^2\) where Δm is the mass difference and c is the velocity of light.
a) For the first case,
\(\begin{aligned}Q_3&=(m_{233U}-m_{232Th}-m_{3He})c^2\\&=(235.0429u-232.0381u-3.0160u)\cdot931.5\;\mathrm{MeV/u}\\&=\mathrm{-10.43\;MeV}\end{aligned}\)
b) For the second case,
\(\begin{aligned}Q_4&=(m_{235U}-m_{231Th}-m_{4He})c^2\\&=(235.0429u-231.0363u-4.0026u)\cdot931.5\;\mathrm{MeV/u}\\&=\mathrm{3.73\;MeV}\end{aligned}\)
c) For the third case.
\(\begin{aligned}Q_5&=(m_{235U}-m_{230Th}-m_{5He})c^2\\&=(235.0429u-230.0331u-5.0122u)\cdot931.5\;\mathrm{MeV/u}\\&=\mathrm{-2.24\;MeV}\end{aligned}\)
The required answers are -10.43 MeV, 3.73 MeV, and -2.24 MeV.
The complete question is -
Large radionuclides emit an alpha particle rather than other combinations of nucleons because the alpha particle has such a stable, tightly bound structure. To confirm this statement, calculate the disintegration energies for these hypothetical decay processes and discuss the meaning of your findings:
(a)²³⁵U→ ²³²Th+³He
(b) ²³⁵U→ ²³¹Th+ ⁴He
(c) ²³⁵U→ ²³⁰Th+ ⁵He
The needed atomic masses are
²³²Th 232.0381 u ³He 3.0160 u
²³¹Th 231.0363 u ⁴He 4.0026 u
²³⁰Th230.0331 u ⁵He 5.0122 u
²³⁵U 235.0429 u
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Enter your answer in the provided box. Use the data given to estimate the total Calories in 100 grams of chocolate chip cookies. Average Energy Content of Macronutrients. Fats 9 Cal/g. Carbohydrates 4 Cal/g. Proteins 4 Cal/g. _____ Calories
Answers
To estimate the total Calories in 100 grams of chocolate chip cookies, we need to know the macronutrient content of the cookies. Without that information, we cannot make an accurate estimate.
Macronutrients are the main types of nutrients that provide energy to the body, namely carbohydrates, proteins, and fats. The caloric content of a food depends on the amount of these macronutrients present in it. Since chocolate chip cookies can be made with different ingredients and in different ways, the macronutrient content can vary widely from one recipe to another. Therefore, without knowing the specific macronutrient content of the cookies, we cannot accurately estimate the total calories in 100 grams of chocolate chip cookies. Different types of cookies can have vastly different caloric values, so it's important to have that information to make an accurate estimate.
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Group 5A, period 3 element
Answers
Phosphorous
If you left a cup of ice out on the countertop on a hot day, do you think your ice melts because of conduction, convection, or radiation? Explain your answer.
Answers
Answer: Should be conduction (for the explanation bit it's below)
technically its both conduction and convection but if its one answer only then conduction should be right
explain your answer bit:
I think it is conduction because the heat in the environment is being transferred into the ice, which is warming it up until it reaches thermal equilibrium and then eventually evaporates.
hope this helps!
what value for a substance can be determined by plotting its absorption spectrum?
Answers
The absorption spectrum is used to determine the wavelength of a substance.
Electromagnetic radiation consists of different radiations of different frequency. The wavelengths of these radiations also differ from each other. When white light is allowed to pass through a medium it gets split into different radiations having different frequencies and wavelengths. These radiations interact with the molecules and matter present in the air and these radiations absorb energy and reach a higher energy level. If the higher energy levels are unstable, then they emit energy to reach to their ground state. This series of emissions and absorptions form a spectra known as the Absorption Spectra or Absorption Spectrum.
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consider the following reaction: a2 b2 → 2ab δh = –377 kj the bond energy of ab=522 kj/mol, the bond energy of b2 = 405 kj/mol. what is the bond energy of a2?
Answers
The bond energy of B2 is approximately -1421 kJ/mol.
How to find bond energy?To determine the bond energy of A2 in the reaction A2 + B2 → 2AB, we can use the concept of bond energy and the given information.
The enthalpy change (∆H) of the reaction is given as -377 kJ, which represents the energy released during the formation of two AB molecules.
We know that the bond energy represents the energy required to break one mole of a particular bond in a compound. In this reaction, two AB molecules are formed, so the energy released (∆H) must be equal to twice the bond energy of AB.
Since the bond energy of AB is given as 522 kJ/mol, twice that value will be 2 * 522 kJ/mol = 1044 kJ/mol.
Now, to determine the bond energy of B2, we subtract the energy released from the bond energy of AB:
Bond energy of B2 = ∆H - 2 * bond energy of AB
\(= -377 kJ - 2 * 522 kJ/mol\)
\(= -377 kJ - 1044 kJ/mol\)
\(= -1421 kJ/mol\)
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what is the typical gas manifold pressure for a natural gas furnace
Answers
The typical gas manifold pressure for a natural gas furnace can vary depending on the specific furnace model and the local gas supply conditions. However, a common range for residential natural gas furnaces is typically between 3.5 to 4.0 inches of water column (inWC) or approximately 0.13 to 0.15 psi (pounds per square inch).
It is important to note that these values are general guidelines and may not be applicable to every furnace. The manufacturer's specifications and guidelines should always be followed to ensure safe and efficient operation of the furnace. It is recommended to consult the furnace's owner's manual or contact a qualified HVAC professional for specific information regarding the gas manifold pressure for a particular furnace model.
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fluorescent objects absorb light and emit it again at a lower frequency of energy explain why the emitted frequency has to be lower
Answers
The emitted fluorescent light has longer wavelength and lower energy because it lost some energy to the solvent molecules and some fraction of energy is dissipated as heat.
What is fluorescence ?A material that has absorbed light or other electromagnetic radiation will emit light when it undergoes fluorescence. It has a luminescent quality. Most of the time, the emitted light has a lower photon energy than the absorbed radiation because it has a longer wavelength.
Fluorescence can be seen when the emitted light is in the visible spectrum while the absorbed radiation is in the ultraviolet (UV) region of the electromagnetic spectrum, which is invisible to the human eye.
The fluorescent photons have lower energy. The non-radiative vibrational transitions taking place in between causes dissipation of energy as heat and some energy is transferred to the solvent molecules.
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When 20.0 g NH3 and 50.0 g O2 are allowed to react, which is the limiting reagent?
Answers
The limiting reagent is \(NH_{3}\).
Given,
Molar Mass of \(NH_{3}\)=17, mass of ammonia=20 g
Moles of \(NH_{3}\)=20/17=1.18mole
Molar Mass of \(O_2\) =32, mass of oxygen=50 g
Moles of \(O_2\) =50/32=1.56mole
\(4NH_3(g)+3O_2(g) = 2N_2(g)+6H_2O(g)\)
so, 1 mole of ammonia will react with = 3/4 of oxygen=0.75 of oxygen
so 1.18 mole of NH3 will react with 1.18\times.75=0.8851.18×.75 = 0.885 mole of oxygen
so from above situation \(NH_{3}\)is limiting reagent.
Limiting reagentWhen a chemical reaction is finished, the limiting reagent is a reactant that has been completely consumed. This reagent controls the amount of product produced because the reaction would not be able to proceed without it. Excess reagents or excess reactants are those that are present in greater amounts than what is necessary for them to react with the limiting reagent.
Since the theoretical yield is defined as the quantity of product achieved when the limiting reagent reacts completely, the limiting reagent must be identified in order to calculate the percentage yield of a reaction.
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Given that the enthalpy of vaporization for water is:
H2O(1) ►H2O(g)
Hvap = + 44.0 kJ/mole
Calculate H for each of the following processes:
a. Evaporating 3.00 moles of water
b. Evaporating 3.00 grams of water
c. Condensing 20.0 grams of water
Answers
Answer:h
Explanation:
HELP! What are 5 changes for testing out a fidget spinner no websites
Answers
Answer:
Explanation:
Can you explain a bit further? once u do, ill edit my answer and tell you :) But to use a fidget spinner, u have to put ur thumb at the bottom and index finger at the top, and spin it with you other fingers if thats what you meant
identify the number of unique h1 nmr and c13 nmr signals for each compound. a. benzene benzene. a six carbon ring with three internal double bonds. how many h1 nmr signals are in a? 1 how ma
Answers
The number of unique H¹ NMR ( proton nuclear magnetic resonance) signals for each compound is it shows only one signal.
The benzene contains the 6 carbon atoms and the 6 hydrogen atoms. the benzene have six protons and all the six protons are the chemical equivalent. they have the same bonding and have the same chemical environment to the each other. they have the same resonance frequency in the H¹ NMR signal in the experiment . that's the reason that the benzene shows only one signal.
Thus, benzene show one signal for the unique H¹ NMR , proton nuclear magnetic resonance experiment.
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g how many minutes will be required to deposit 1.00 g of chromium metal from an aqueous croisolution using a current of 6.00 a?
Answers
The time that is required to deposit 1.00 g of chromium metal is 30.9 mins.
Faraday's II Law of electrolysis states that if the equal quantity of energy is handed thru extraordinary electrolytes, the loads of ions deposited on the electrodes are without delay proportional to their chemical equivalents.
The chemical equation of the reaction can be represented as follows:
Cr6+ + 6e → Cr
Moles of Cr = mass / molar mass = 1 / 52 = 0.0192 mol
Moles of electrons needed = 6 * moles of Cr = 6 * 0.0192 = 0.1152 mol
Charge needed = moles of e * charge per mole of e = 0.1152 * 96485.33 = 11115.110 C
Now time needed = charge / current = 11115.110 / 6 = 1852.52 seconds = 1852.52 / 60 min = 30.9 min
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A 35.40 gram hydrate of sodium carbonate, Na2CO3•nH2O, is heated to a constant mass. Its final weight is 30.2 g. What is formula for the hydrate?A. Na2CO3∙1H2OB. Na2CO3∙2H2OC. Na2CO3D. Na2CO3∙3H2O
Answers
First, we have to calculate the molecular weights of each molecule:
\(\begin{gathered} Na_2CO_3\text{ : 23*2+12+16*3= 106 g/mol} \\ H_2O\text{ : 1*2+16= 18 g/mol} \end{gathered}\)Then, we have to calculate the number of grams of water. We can calculate them because the process of evaporation lets us know the water amount that was retired:
\(g\text{ H}_2O\text{ = 35.40 g - 30.2 g=5.2 g H}_2O\)Then, we're gonna convert the grams of sodium carbonate alone (30.2 g) and the grams of water to moles:
\(\begin{gathered} 30.2\text{ g Na}_2CO_3\text{ * }\frac{1\text{ mol}}{106\text{ g}}=\text{ 0.2849 mol Na}_2CO_3\text{ }\approx0.3\text{ mol Na}_2CO_3 \\ \\ 5.2\text{ g H}_2O\text{ * }\frac{1\text{ mol}}{18\text{ g}}=\text{ 0.288 mol H}_2O\text{ }\approx\text{ 0.3 mol H}_2O \end{gathered}\)It means that the mole relation is 1:1 approx, as it is the same amount for both. Then, the formula is going to be:
\(Na_2CO_3\text{ . 1H}_2O\)It means that the answer is A.
8)
The animals in the food web release
into the environment, which plants then use for
A)
oxygen respiration
B)
carbon dioxide respiration
water vapor photosynthesis
D)
carbon dioxide photosynthesis
Answers
Answer:
Carbon dioxide photosynthesis
Explanation:
During photosynthesis, plants take in carbon dioxide (CO2) and water (H2O) from the air and soil.
hope it helps
N2O4 (g) 2 NO2 (g) what is happening?
Answers
N₂O₄(g) ----> 2NO₂(g) is called as the decomposition reaction.
When one reactant in a chemical reaction is decompose to form one or more products then the chemical reaction is said to be decomposition reaction. The reaction is as follows :
N₂O₄(g) ----> 2NO₂(g)
This equation is balanced equation. Dinitrogen tetroxide containing N - N single bond dissociates to form two molecules of nitrogen dioxide. the reaction is called as decomposition reaction . decomposition reaction are generally endothermic reaction because they require heat to decompose. as we know to break the bond energy is absorbed and formation of bond is the release of energy.
Thus, N₂O₄(g) ----> 2NO₂(g) is called as the decomposition reaction.
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what is the pOH of a solution with [H3O+] = 8.2 x 10-5M?
Answers
Answer:The pOH of the solution is 9.914
Explanation:
pH is given as the negative logarithm (base 10) of the hydronium ion concentration [H₃O⁺] that is
pH= - log [H₃O⁺]
Since we are given [H₃O⁺]=8.2 x 10⁻⁵,
pH=- log (8.2 x 10⁻⁵)
pH= 4.086
The pOH gives s the measurement of the concentration of OH− ions, Hence,
pH + pOH= 14
from the above calculation, we got pH=4.086
So
4.086 + pOH=14
pOH= 14 - 4.086
pOH= 9.914
The pOH of the solution is 9.914
magnetic resonance spectroscopic measurement of cerebral gamma-aminobutyric acid concentrations in patients with bipolar disorders
Answers
Magnetic Resonance Spectroscopy (MRS): MRS is a non-invasive imaging technique that allows for the measurement of chemical concentrations in the brain. It uses magnetic fields and radio waves to detect the signals emitted by different chemicals in the brain.
Gamma-Aminobutyric Acid (GABA): GABA is an important neurotransmitter in the brain that helps regulate neuronal activity. It is involved in the inhibition of neuronal signals, which is crucial for maintaining a balance in brain function.
Bipolar Disorder: Bipolar disorder is a mental illness characterized by extreme shifts in mood, energy, and activity levels.
It is believed to be caused by a combination of genetic, environmental, and neurochemical factors.
Measurement of GABA Concentrations: The MRS technique allows researchers and clinicians to measure the concentration of GABA in the brain. By comparing the GABA levels in patients with bipolar disorder to those without the disorder, scientists
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