50 points for 2 questions and brainliest! Please help!!!!
1) In the following reaction, what is the ratio of zinc chloride (ZnCl2) to potassium chloride (KCl)?
The equation - 2K(MnO4) + ZnCl2 → Zn(MnO4)2 + 2KCl 10.
2) If six moles of hydrogen chloride (HCl) react with plenty of aluminum, how many moles of aluminum chloride (AlCl3) will the reaction produce?
The equation - 2Al + 6HCl → 2AlCl3 + 3H2
Answers
Answer:
a)
Explanation:
6HCl + 2Al ---> 2AlCl3 + 3H2
6 mol 2 mol
As we can see 6 mol HCl produce 2 mol AlCl3.
Related Questions
which of the following statements correctly describe resonance structures? select all that apply.
Molecules that require more than one inwis structure to accurately describe them.
The actual molecule is an average of the Lewis structure.
Moleculos that change back and forth between several different forms Molecules that spin so that double bends paint in ditferent dircctions
Molecules that react with other molecuies and form a hybrid
Answers
The statements correctly describe resonance structures is The actual molecule is an average of the Lewis structure. Therefore, option B is correct.
What is Lewis structure ?The representations known as Lewis structures, often referred to as Lewis dot formulas, Lewis dot structures, electron dot structures, or Lewis electron dot structures, depict the interactions between the atoms in a molecule as well as any lone pairs of electrons that may be present.
The electronic bonding of a single polyatomic species, including fractional bonds and fractional charges, is described by resonance structures, which are a collection of two or more Lewis structures.
In comparison to separate resonance structures, the resonance hybrid is more stable. The movement of a charge between two or more atoms is frequently represented by resonance structures. These atoms have a more evenly distributed charge, which makes it more stable.
Thus, option B is correct.
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Carbon cycle – What are the main reservoirs
of the carbon cycle? Where do the inorganic and organic carbon
cycles interact? What are the major differences and similarities
between the inorganic and organic carbon?
Answers
The main reservoirs of the carbon cycle are the atmosphere, oceans, land (including vegetation and soils), and fossil fuels. In these reservoirs, carbon exists in both inorganic and organic forms.
The inorganic carbon cycle involves the exchange of carbon dioxide (CO2) between the atmosphere and oceans through processes like photosynthesis and respiration.
Organic carbon, on the other hand, is found in living organisms, dead organic matter, and soil organic matter. It is cycled through processes such as decomposition and consumption by organisms. The interactions between the inorganic and organic carbon cycles occur primarily in the biosphere, where photosynthesis converts inorganic carbon into organic carbon compounds. While inorganic carbon is primarily in the form of CO2, organic carbon is present in complex organic molecules. Both forms of carbon play crucial roles in energy transfer, nutrient cycling, and climate regulation.
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The equilibrium concentrations for the following reaction are below. Is the system at equilibrium? If not, which way does the reaction need to shift to reach equilibrium?CO(g) + Cl2(g) ⇌COCl2(g)Kc= 1.5 x 1040.0040 M COCl2, 0.00021 M CO, and 0.00040 M Cl2
Answers
According to the given equilibrium concentrations, the system is said to be at equilibrium as the concentration of substances does not change.
What is Equilibrium state?Kc can be calculated by dividing the product of the concentrations of the products by the product of the concentrations of the reactants, each raised to the power corresponding to its stoichiometric coefficient.
The expression for Kc, which is a measure of the equilibrium constant, is: [COCl₂]/[CO][Cl₂] = 1.5 × 10⁴
Equilibrium concentrations: [COCl₂] = 0.0040 M
[CO] = 0.00021 M
[Cl₂] = 0.00040 M
Substituting the values into the equilibrium constant expression:
[COCl₂]/[CO][Cl₂] = (0.0040) / [(0.00021) (0.00040)] =1.5 × 10⁴
The numerical value of the expression is the same as the numerical value of Kc. As a result, the system is already in equilibrium since it has the same equilibrium constant value as the one provided. No shift is necessary to attain equilibrium as it is already achieved.
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Which of the following groups is matched with a correct anatomical feature?
A) foraminifera→silicon-rich tests
B) dinoflagellata→holdfast
C) diatoms→tests made of cellulose
D) phaeophyta (brown algae)→
blade
Answers
Among the given options, the correct match between a group and its anatomical feature is: C) Diatoms → tests made of cellulose.
Diatoms are a type of algae belonging to the phylum Bacillariophyta. They are known for their intricate and delicate cell walls called tests or frustules. These tests are composed primarily of silica, making option A incorrect. Dinoflagellates (option B) are unicellular organisms that possess two flagella and do not have a holdfast. Phaeophyta, or brown algae (option D), have structures called blades that serve as their leaf-like photosynthetic organs. Hence, the correct match is diatoms having tests made of cellulose.
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If gas molecules in an enclosed chamber are allowed to enter a second chamber, the resulting redistribution of gas molecules represents an increase in?
Answers
If gas molecules in an enclosed chamber are allowed to enter a second chamber, the resulting redistribution of gas molecules represents an increase in entropy.
Entropy is defined as the measure of a system's thermal energy or te amount of energy which is unavailable to do work.
The entropy is known to increase because of the pressure or concentration is reduced. Entropy of gases are much larger than the condensed phases.
Entropy is the measure of the randomness or disorder of the system.
When the gas molecules were in an enclosed chamber, they were at a constant temperature and molecules did not slow down but when they were allowed to enter a second chamber, they had more place in container where they were in disorder, which resulted in redistribution of gas molecules, increasing the entropy of gas due to its expansion.
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the toxic chemicals present in the soil can decrease soil fertility and therefore decrease in the soil yield. the contaminated soil is then used to produce fruits and vegetables which lacks quality nutrients and may contain some poisonous substance to cause serious health problems in people consuming them.
Answers
The toxic chemical compounds gift in the soil can lower soil fertility and therefore lower the soil yield.
chemical compounds such as lead can harm the anxiety system, inclusive of the mind. Contaminants may also be absorbed via the pores and skin. Creosote is a not unusual cloth used to hold timber in the USA. This complicated mixture of chemical compounds can leach out of treated wood and contaminate the soil.
Soil toxicities are constraints on the useful resources available to the crop. Toxicities in the subsoil seem to perform through restricting root boom, the most important outcome of which within the Australian environment is reduced yield because of reduced water availability to the crop (Dang et al., 2008).
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In response to an aspirin (acetylsalicylic acid) overdose, you would expect to observe which acute compensatory response
Answers
Compensatory responses are the compensation mechanism that maintains the body's fluid levels. The increased alveolar ventilation is seen in aspirin overdose.
What is an aspirin overdose?Aspirin or acetylsalicylic acid is a general pain reliever that can cause poisoning when overdosed. It results in tinnitus, hyperventilation, increased heart rate, low blood pressure, fever, dehydration, etc.
Aspirin toxicity decreases the pH making the blood more acidic causing increased ventilation through alveoli to remove the excess carbon dioxide to balance the pH levels.
Therefore, in aspirin poisoning, the increased alveolar ventilation is the acute compensatory response.
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A gardener finds that his potted plants do not grow well . He notices that the soil present in most of the flower pots is sticky and that there is a lot of water collected in flower pot too . What can he do to help the plants grow better?
Answers
1. Change the soil: The gardener should remove the sticky soil from the flower pots and replace it with fresh, well-draining soil. This will help the excess water drain away and prevent the soil from becoming waterlogged.
2. Provide proper drainage: The gardener should ensure that the flower pots have proper drainage holes to allow excess water to drain away. If the pots do not have drainage holes, he can drill some holes in the bottom.
3. Water the plants correctly: The gardener should water the plants only when the soil is dry to the touch. Overwatering can lead to waterlogged soil and root rot, which can kill the plant.
4. Provide adequate sunlight: The gardener should ensure that the plants are receiving adequate sunlight. Most plants need at least 6 hours of sunlight per day to grow properly.
5. Fertilize the plants: The gardener can fertilize the plants with a balanced fertilizer to provide the necessary nutrients for growth. He should follow the instructions on the fertilizer package and avoid over-fertilizing, which can damage the plants.
The body compensates for metabolic alkalesis (in an effort to maintain normal pH) by doing which of the following? Decrease HCO, excretion B Decrease urine pH D Increase H secretion into the renal tubule lumen Increase renal production of H₂PO Decrease ventilation rate
Answers
The body compensates for metabolic alkalesis (an increase in pH) by increasing H+ secretion into the renal tubule lumen.
Metabolic alkalesis is a condition characterized by an increase in blood pH, often caused by excessive loss of acids or an increase in bicarbonate (HCO3-) levels. In order to maintain normal pH, the body undergoes compensatory mechanisms.
One of the ways the body compensates for metabolic alkalesis is by increasing H+ secretion into the renal tubule lumen. This means that the kidneys actively excrete more H+ ions into the urine, reducing the pH of the urine. By increasing the excretion of H+ ions, the body can decrease the overall alkaline load and help restore the normal pH balance.
Other options listed in the question, such as decreasing HCO3- excretion, decreasing urine pH, increasing renal production of H2PO4-, and decreasing ventilation rate, are not typical compensatory mechanisms for metabolic alkalesis. The primary mechanism involved in compensating for metabolic alkalesis is the increased secretion of H+ ions into the urine by the kidneys.
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You were given a 100. G wine sample to verify its age. Using tritium dating you observe that the sample has 0. 688 decay events per minute. Tritium has a half life of 12. 3 and fresh water exhibits 5. 5 decay events per minute per 100g. What year was the wine produced?.
Answers
Wine was produced 37 years ago (1984 as usual year 15,2021) that is shown in the calculations below.
Reaction rate is calculated using the formula rate = Δ[C]/Δt, where Δ[C] is the change in product concentration during time period Δt. The rate of reaction can be observed by watching the disappearance of a reactant or the appearance of a product over time.
The time can be represented as follows:
t= 2.303\∧ log A0/A
∧= 0.693/t 1/2
The rate of a reaction is proportional to the reciprocal of the time taken. Rate α 1 time Rate is inversely proportional to time. Units: s-1, min-1 etc.
The given parameters are as follows:
t1/2=12.3
A0=5.5
A=0.688
t= 2.303/(0.693/12.3) log (5.5/0.688)
t=36.9
t=37 years
Thus, wine was produced 37 years ago (1984 as usual year 15,2021)
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How many carbon atoms are represented in the formula for CaMg3(CO3)4
Answers
Answer : There are 4 Carbon atoms in the formula.
solid aluminum al and oxygen o2 gas react to form solid aluminum oxide al2o3. suppose you have 2.0 mol of al and 3.0 mol of o2 in a reactor. what would be the limiting reactant? enter its chemical formula below.
Answers
The limiting reactant for solid aluminum al and oxygen o2 gas react to form solid aluminum oxide al2o3. suppose you have 2.0 mol of al and 3.0 mol of o2 in a reaction is Al.
For given trouble chemical response will be,4Al+3O2 ⇒2Al2O3By the way of means of above stability response it's miles that four mole Al will react with three mole O2 for whole response. i.e. Al:O2= four: three so four mole Al at = three mole O2 therefore, 1 mole Al will eat= three/four mole of O21 mole Al will eat = 0.75 mole of O2 right here O2 is given 2 moles therefore Al will eat first via way of means of reacting with 0.75 mole of O2. So Al is restricting or limiting reagent for the solid aluminum al and oxygen o2 gas react to form solid aluminum oxide al2o3.
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A 0.860-kg sample of tin (with a specific heat of 210.0 J/(kg x K)) is heated to 525 K and then placed in 1.20 kg of water that is at 303 K. If the system is left to reach its equilibrium state, what will the equilibrium temperature be? Assume that no thermal energy is lost to the external environment. Use 4.186 J/(g x K) as the specific heat of water.
PLEASE ANSWER QUICK WILL GIVE BRAINLIEST
Answers
Answer: 310K
Explanation: I got it right
Answer:
310 k
Explanation:
Hope this helps
What is the one defining abiotic factor of a desert?
cold temperatures
high winds
little or no rainfall
high humidity
Answers
Hello! :p .
deserts are known to have little to no rain fall & drop to very low temperatures at night! I hope this helps!
Answer: little or no rainfall
Explanation: Precipitation, sunlight, and temperature are all abiotic factors.
Deserts have a lack of rainfall.
Some deserts are hot, some deserts can be cold too.
Abiotic factors are extreme temperatures of the day and night the fast winds the strong amount of sunlight scarcity of water
please help me honey I really need help
Imagine I am your dad and write a love letter to me
Answers
Answer:
Explanation:
Dear dad i loved you the day i was born and i kept it a secret for all this time because i thought it would be weird but today i am confident so i will confess everything I LOVE YOU omg i feel so much better and when im grown up i want to marry sorry mom but i am next so plz tell me how you feel so don't lie
From your dear daughter or son
Suppose the beam consists of a mixture of 12C and 14C ions. If v and B have the same values as in part B, calculate the separation of these two isotopes at the detector. Express your answer with the appropriate units.
Answers
This beam separation should allow for easy separation of the two ions .∆R = 4 cm if the beam consists of a mixture of 12C and 14C ions.
What is an example of a chemical separation?A simple example of chemical separation is the use of desiccants to remove water from a gas stream. The percentage of carbon dioxide in blast furnace gas may be determined by measuring the thermal conductivity of the gas before and after selective removal of the carbon dioxide by passing the gas through soda lime.
What is nature of separation?The Parties agree that the termination of the employment relationship between the Parties shall be treated as a separation by mutual agreement of the Parties.
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a large stone wieghs 53.0 kg. How many pounds does it weight
Answers
The large stone weighs 116.865 pounds.
Given the following data:
Mass of stone = 53.0 kilogramsTo find how much the large stone weighs in pounds;
In this exercise, we would convert the value of the weight of the large stone in kilograms to pounds.
Conversion:
1 kilogram = 2.205 pounds
53 kilograms = X pounds
Cross-multiplying, we have;
1 × \(X = 53\) × \(2.205\)
X = 116.865 pounds
Therefore, the large stone weighs 116.865 pounds.
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In what regions of the atmosphere, the temperature increases with altitude and in which regions it decreases.
Answers
The regions of the atmosphere where the temperature increases with altitude is stratosphere and where the temperature decreases with altitude is troposphere and mesosphere.
The earth is surrounded by atmosphere and the atmosphere is divided into several parts.
With increase in altitude the temperature varies in the atmosphere.
The reason of the atmosphere where the temperature increases with the altitude are stratosphere and thermosphere.
The region of the atmosphere where the temperature of the atmosphere decreases with the increase in the attitude easy troposphere and Mesosphere.
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ammonia reacts with oxygen according to the following equation. 4 nh3(g) 5 o2(g) equilibrium reaction arrow 4 no(g) 6 h2o(g) the enthalpy of reaction for this reaction is negative. identify two changes that could be made to the system to shift the equilibrium toward the products and two changes that could be made to shift the equilibrium toward the reactants. (select all that apply.) changes that would shift the equilibrium toward the products: increasing the volume of the system increasing the concentration of no or h2o decreasing the concentration of nh3 or o2 reducing the temperature of the system changes that would shift the equilibrium toward the reactants: increasing the volume of the system increasing the concentration of no or h2o decreasing the concentration of nh3 or o2 reducing the temperature of the system
Answers
Based on the number of particles involved and the enthalpy of the reaction, changes that would shift the equilibrium to the right would, according to Le Chatelier's principle, include increasing the volume of the system, reducing the pressure of the system, reducing the temperature of the system, increasing the concentration of ammonia and/or oxygen and reducing the concentration of NO and/or water. Changes in the opposite direction would cause the equilibrium to shift towards the reactants.
Upon increasing pressure or reducing volume, the equilibrium shifts in the direction that produces fewer gaseous particles. In this case, that's the reactants (9 molecules) and not the products (10 molecules). When considering temperature, it is useful to consider heat as one of the reaction components. When the enthalpy of the reaction is negative, heat is produced so it can be considered to be one of the products. Le Chatelier's principle states that upon changing one of the variables, the equilibrium will shift in the direction that counteracts the effects of the change. So, when reducing the temperature of the system, we are taking the heat out of the system, so equilibrium will shift to the products so that it can produce more heat, and vice versa. The same principle applies to the concentrations of ammonia, oxygen, water, and NO.
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the standard free-energy change for this reaction in the direc- tion written is 123.8 kj/mol. the concentrations of the three intermediates in the hepatocyte of a mammal are: fructose 1,6-bisphosphate, 1.4 3 1025 m; glyceraldehyde 3-phosphate, 3 3 1026 m; and dihydroxyacetone phosphate, 1.6 3 1025 m. at body temperature (378c), what is the actual free-energy change for the reaction?
Answers
The actual free-energy change for the reaction is 124.7 kJ/mol.
The actual free-energy change for the reaction can be calculated using the standard free-energy change (ΔG°) and the concentrations of the reactants and products at equilibrium. The equation relating these values is:
ΔG = ΔG° + RT ln(Q)
where R is the gas constant (8.314 J/mol·K), T is the temperature in Kelvin (378 K), and Q is the reaction quotient. The reaction quotient can be calculated using the concentrations of the reactants and products as follows:
Q = ([glyceraldehyde 3-phosphate][dihydroxyacetone phosphate])/([fructose 1,6-bisphosphate])
Substituting the given values, we get:
Q = (3 x 10^26 M)(1.6 x 10^25 M)/1.4 x 10^25 M = 3.43
Now we can plug in the values into the equation for ΔG:
ΔG = (123.8 kJ/mol) + (8.314 J/mol·K)(378 K) ln(3.43)
ΔG = 123.8 kJ/mol + 902.5 J/mol = 124.7 kJ/mol
Therefore, the actual free-energy change for the reaction is 124.7 kJ/mol.
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Plz help me with is thank you
A.4.0m/s
B.4.8m/s
C.5.6m/s
D.6.4m/s
Answers
Which of the following do all food chains in an ecosystem depend on
Answers
Next time please write down the answer choices too.
To illustrate Robert Millikan' determination of the charge on an electron, suppose that you were given the task of determining the mass of a single jelly bean given the tollowing experimental data. Various scoops of jelly beans were weighed and the following masses determined. The number of jelly beans in each scoop was not known. Masses (in grams) of ten different scoops: 4.96 8.68 13.64 7.44 21.08 16.12 9.92 19.84 6.20 12.40
Answers
The mass of one jelly bean is 1.10 g which is determined from the average of the masses of the scoops of Jelly bean.
What was the Millikan's experiment?Robert Millikan set up an experiment to determine the charge on electron using an oil droplet. This was known as the charged oil droplet experiment.
In the experiment, Millikan sprayed tiny oil drops into a uniform electric field between a horizontal pair of oppositely charged plates and observed them with a magnifying eyepiece.
The electric field was adjusted so that the upward force on some negatively charged oil drops was just sufficient to balance the downward force of gravity.
The charges on many of the oil droplets was found to be whole number multiples of 1.6 × 10⁻¹⁹ C, which is the the charge on an electron.
The mass of a single jelly is determined from the average of the sum of all the masses of the scoops of jelly bean.
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Energy has different _____ , such as electrical, chemical, and thermal.
Answers
Answer:
forms/types
Explanation:
a sample of tin is heated until it finishes melting. the sample absorbs a total of 1050 j of heat. if the sample requires 460 j of heat to reach its melting point, how much heat is needed to completely melt the sample of tin?
Answers
The heat of fusion is the amount of heat energy needed to turn anything solid into a liquid. There is a formula, Q = mHf. Because matter doesn't affect temperature, the temperature is not a factor.
Will the addition of heat cause the temperature to rise during a phase change?There is no increase in the kinetic energies of the particles, and hence no rise in temperature, because the energy required for phase shifts is employed to break bonds. Similarly, energy is required to evaporate a liquid to defeat the attraction forces between the liquid's particles.
Does the temperature drop when a phase shift occurs?The energy that is given during a change in the state of matter is used to alter the binding energies rather than boost the kinetic energy of the molecules. As a result, the temperature doesn't change.
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Choose a celebrity who died due to an overdose of drugs or alcohol and answer the following questions in your discussion post:
1)What is the name and cause of death of the celebrity?
2)What drug(s) was indicated in the death of this person?
3)What type of drug was it? (Depressant, stimulant, hallucinogenic, etc.)
4)What are the typical effects of that drug?
5)How is the drug typically identified and analyzed in the Toxicology lab?
6)List one question that you would ask the friends and family of the deceased to help with the investigation.
Answers
Answer:
Jay Bennett
Fentanyl
Opioid
extreme happiness, drowsiness, nausea, confusion, constipation, sedation, tolerance, addiction, respiratory depression and arrest, unconsciousness, coma, and death.
In Urine
Why did Jay overdose on Fentanyl?
Explanation:
I looked all of this up
how many signals would you expect to see in the 1h nmr spectrum of the following compound? please enter a numerical response.
Answers
The number of signals seen in a 1H NMR spectrum is dependent on the number of distinct hydrogen environments in a molecule. Each unique hydrogen environment will give rise to a signal in the spectrum.
To answer your question, it's necessary to have the compound's structure or chemical formula provided. In a 1H NMR spectrum, signals arise from the different hydrogen environments within the molecule. Without the compound's information, I'm unable to determine the number of signals expected. Please provide the compound's details so I can assist you further.
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Consider the reaction. At equilibrium, the concentrations of the different species are as follows. [NH3]
Answers
The equilibrium constant for the reaction at this temperature is 0.003.
The equilibrium constant (Kc) is a numerical value that indicates the extent of a chemical reaction at equilibrium. It is defined as the ratio of the concentrations of the products raised to their stoichiometric coefficients divided by the concentrations of the reactants raised to their respective stoichiometric coefficients.
The equilibrium constant is a characteristic property of a given chemical reaction at a specific temperature.
The balanced equation for the reaction is:
N₂(g) + 3H₂(g) ⇌ 2NH₃(g)
The equilibrium constant expression for this reaction is:
Kc = [NH₃]² / ([N₂] [H₂]³)
Kc = (0.105 M)² / ((1.1 M) (1.50 M)³)
Kc = 0.003
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The complete question is -
Consider the reaction. At equilibrium, the concentrations of the different species are as follows.
[NH₃] = 0.105 M [N₂] = 1.1 M [H₂] = 1.50 M
What is the equilibrium constant for the reaction at this temperature?
At equilibrium, the concentrations of the different species in a reaction can be determined by the equilibrium constant expression. The equilibrium constant, denoted as K, is a ratio of the concentrations of the products to the concentrations of the reactants, with each concentration raised to the power of its stoichiometric coefficient.
For the reaction you mentioned, [NH3] represents the concentration of ammonia (NH3) at equilibrium. The equilibrium constant expression for this reaction would be:
K = [NH3]
The concentration of ammonia at equilibrium is directly related to the value of the equilibrium constant. However, without knowing the value of K or the concentrations of the other species involved in the reaction, it is not possible to determine the actual concentration of NH3 at equilibrium.
In general, at equilibrium, the concentrations of reactants and products will remain constant as long as no external factors, such as changes in temperature or pressure, are introduced to the system.
To summarize, at equilibrium, the concentration of NH3 can be determined using the equilibrium constant expression, but without additional information, it is not possible to provide a specific concentration value.
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what are the similarities between polarity and ionic bonds?
Answers
Both polarity and the ionic bond have positive and negative charges.
What is ionic bond?The term ionic bond has to do with the kind of bond in which there is a transfer of electrons from one atom to the other. The fact that there is a transfer of electrons means that one of the atoms would be positively charged while the other atom would be negatively charged.
We say that a bond is polar if there is an unequal sharing of electrons between the bonds in the compound. This is not a total transfer of electrons but a partial positive and negative charge that is developed based on the proximity of the electron pair.
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15.) The vapor pressure (at 25 °C) of benzene and toluene are 103.4 and 46.9 torr respectively. In a solution of 45.0 g of benzene and 55.0 g toluene what is the applied pressure? (benzene = C6H6 = 78g/mol, toluene = C,Hg = 92 g/mol) a) 102.7 b) 36.3 c) 16.4 d) 169.0 e) 174.6 f) none
Answers
The partial pressure of benzene and toluene is 74.11 torr.
Generally, vapor pressure is defined as a measure of the tendency of a material to change into the gaseous or vapor state, and it basically increases with temperature. Basically the temperature at which the vapor pressure at the surface of a liquid becomes equal to the pressure exerted by the surroundings is known as the boiling point of the liquid.
Pa denotes the Vapor pressure of benzene = 103.4 torr
Pb denotes the Vapor pressure of toluene = 46.9 torr
Moles of benzene can be calculated by the formula,
Number of moles of benzene = Given mass of benzene / Molar mass of benzene = 45/78 = 0.57 moles
Number of moles of toluene = Given mass of toluene/ Molar mass of toluene = 55/92 = 0.59 moles
Mole fraction of benzene (Xa) = 0.57/(0.57+0.59) = 0.57 / 1.16 = 0.49
Mole fraction of toluene (Xb) = 0.59/(0.57+0.59) = 0.50
Partial pressure = (XaPa + XbPb)
= 0.49 × 103.4 + 0.50 × 46.9
= 50.666 + 23.45 = 74.11 torr
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