Initially, the Flack is the flask filled with water and weighed to find may of water + flask Afla that the Flask is empty flack in noted. emptied and mars ofMass of water in the beaker. calculated by is mars of the flask from. subtracting from this volume of a mass of water + flask.
Flask is calculated using the standard density of water at that ten pleasure. If the flask is not a day from outside at that time, the mass of water will be More than the actual. This results. the higher calculated volume of the flask. As Molar mass. M- MRT PV mass of volatile where Mina's liquid.
Analysis of total nitrogen in organic matrices can be performed using the Dumas method. This ensures the complete combustion of the matrix under oxygen. The resulting gas is reduced with copper and dried with CO2 trapped. Next, quantify nitrogen using a universal detector. Use a thin glass flask with a long neck.
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when mountains and water combine, Do you expect volcanos, trenches, mountain ranges, shallow or deep earthquakes.
The correct answer to the statement " when mountains and water combine, do you expect volcanos, trenches, mountain ranges, shallow or deep earthquakes " is yes, it does happen.
Why volcanoes occurs when mountains and water combines.The simple reason why the activities in the task above results including volcanoes is simply because of the cracks opened in the floor of ocean when two different plate spreads. When this happens, it causes volcanoes to occur.
A volcano refers to a mountain with fragments of rocks.
So therefore, from the explanation given above, it can be deduced that activities like volcanoes erupt when the ocean combine with mountains.
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Gneiss is formed. The mineral grains in granite are flattened under pressure. Tell which event would occur first
When the mineral grains flatten and align in parallel bands, a type of metamorphic rock called gneiss is created. It is a rock with mineral grains made up of a variety of minerals.
such as graphite and quartz. High pressure and heat are used to form it. One popular and often found category of metamorphic rock is gneiss. It is created by igneous or sedimentary rock formations that have undergone metamorphic processes at high temperatures and pressure. In contrast to schist, gneiss forms at higher temperatures and pressures.
Compounds found only in living things are typically not considered minerals according to geological definitions. But other mineral grains, like calcite, are frequently biogenic is classified as organic molecules (such as mellite ).
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ammonium perchlorate is the solid rocket fuel that was used by the u.s. space shuttle and is used in the space launch system (sls) of the artemis rocket. it reacts with itself to produce nitrogen gas , chlorine gas , oxygen gas , water , and a great deal of energy. what mass of oxygen gas is produced by the reaction of of ammonium perchlorate? be sure your answer has the correct number of significant digits.
The numerical coefficients in a balanced chemical process describe the species-mole ratio. This mole ratio is used to compare two species' chemical compositions.
Take into account the balanced reaction for ammonium perchlorate's breakdown:
2 → N₂ + Cl₂ + 4H₂O + 2O₂
We can see from the aforementioned reaction that the amount of ammonium perchlorate that will react and the amount of oxygen gas that will be created are equal. Using the molar mass of 117.49 g/mol to calculate the moles of ammonium perchlorate
moles NH₄ClO₄ = 4.4 g / (117.49 g/mol) = 0.03745 mol
moles O₂ = 0.03745 mol
The oxygen gas moles will then be converted to mass (molar mass = 32 g/mol).
mass O₂ = 0.03745 mol * 32 g/mol = 1.2 g.
Therefore, the mass of oxygen gas produced by the reaction of ammonium perchlorate is 1.2 grams.
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COMPLETE QUESTION:
Ammonium perchlorate, NH₄ClO₄, is the solid rocket fuel used by the U.S. Space Shuttle. It reacts with itself to produce nitrogen gas N₂, chlorine gas Cl₂, oxygen gas O₂, water H₂O, and a great deal of energy. What mass of oxygen gas is produced by the reaction of 4.4g of ammonium perchlorate?
a soluble iodide was dissolved in water. then an excess of silver nitrate, , was added to precipitate all of the iodide ion as silver iodide, . if g of the soluble iodide gave g of silver iodide, how many grams of iodine are in the sample of soluble iodide? what is the mass percentage of iodine, , in the compound?
Answer:
a: 1.181grams of iodine are present in the sample of soluble iodide.
b: 76.44 percent iodine is the mass percentage of iodine when excess silver nitrate was added to precipitate all of the iodide ions
Explanation:
We know that when silver reacts with halides it forms precipitate, silver when reacts with iodine it forms a yellow coloured precipitate of silver iodide which is an inorganic compound soluble in water. One odd characteristic of silver iodide is that it is photosensitive and may form metallic/dark silver if exposed to light. One of the most renowned albeit controversial use of silver iodide is that it is used to generate rain through clouds
Ag+ (aqueous)+ I−(aqueous) →AgI(s) yellow precipitate
2.185g x (1 mole of AgI / 234.77 AgI) x (1 mole Iodine/1 mole AgI) x (126g of Iodine/1 mole of I)
= 1.181g
b)Now, mass percentage can be obtained by using the following formula
mass percentage = mass of solute/mass of solution x 100
iodine mass percent = (mass of iodine/mass of soluble iodide) x 100
= (1.181/1.545) x 100 = 76.44 %
mass percentage is the mass of the element/solute divided by the mass of compound or solution ,then the result is multiplied to get the answer. It can be defined as the weight of solute in a particular weight of solution.
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when 2 moles of react with to form according to the following equation, 799 kj of energy are evolved. is this reaction endothermic or exothermic? endothermic what is the value of ?
The given question is incomplete and the complete question is
When 2 moles of Fe(s) react with Cl2(g) to form FeCl3(s) according to the following equation, 799 kJ of energy are evolved. Is this reaction endothermic or exothermic and What is the value of q
When 2 moles of Fe(s) react with Cl2(g) to form FeCl3(s) according to the following equation, 799 kJ of energy are evolved then the reaction is exothermic reaction and the value of q is -1598 kJ
Mole is the amount of substances of a specified elementary entity
2 moles of Fe(s) react with Cl2(g) to form FeCl3(s)
Energy = 799 kJ
We have to calculated reaction endothermic or exothermic = ?
The value of q = ?
So according to the reaction 799 kJ of energy are evolved it means that the enthalpy is negative as the reactant have more energy than the product and which means this is an exothermic reaction
And here we know that enthalpy of reaction is -799kJ/mol and considering the reacted 2 mole of solid iron then
q = 2 mol×-799kJ/mol
q = -1598 kJ
-1598 kJ energy are evolved when 2 mole of solid iron is react
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For an electron to change from an excited state to a ground state, it must
Answer:
An atom changes from a ground state to an excited state by taking on energy from its surroundings in a process called absorption. The electron absorbs the energy and jumps to a higher energy level. In the reverse process, emission, the electron returns to the ground state by releasing the extra energy it absorbed.
A balloon filled with room temperature air and then put in a sunny place expands slightly due to a rise in temperature. This due to the molecules of air
A balloon filled with room temperature air and then put in a sunny place expands slightly due to a rise in temperature and this is because the molecules of air are moving faster.
Why does this happens?The volume occupied by the air inside the balloon and the pressure exerted by the air particles on the balloon wall increases. The sun's temperature is higher than room temperature.Because the sun is hotter than room temperature, the volume of air inside the balloon increases.This is because the volume occupied by a gas is directly proportional to its temperature at constant pressure (Charles' law) volume ∝ temperatureThe pressure on the balloon from an external source does not change, but as the volume of the balloon increases, the pressure exerted on the balloon walls by the air particles increases.The average kinetic energy of gas molecules increases with sun's hotness. what is charle's law?Charles' law is an experimental gas law that describes how gases expand when heated. A modern statement of Charles' Law is that Kelvin temperature and volume are directly related if the pressure on a dry gas sample is held constant .
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when atoms react, they often lose, gain, or share electrons to form a more stable version of themselves. for example, alkali metals such as na lose their outer shell electron in their reactions to form compounds. the electron configuration of alkali metals would then resemble those of which group of the periodic table in the compounds they form?
Answer: The alkali metals will lose an electron to resemble the next lowest noble gas; thus, all the alkali metals form +1 ions. K loses an electron so that it will have the same electron configuration as Ne.
1A or group 1
Hope this helps! Have a good day!
The electron configuration of alkali metals would then resemble those of group 17 of the periodic table in the compounds they form.
What is periodic table?Periodic table is defined as a tabular approach of showing the items so that they appear in the same vertical column or group when their attributes are similar. Phosphorus is the oldest chemical element, and hassium is the newest. Please take note that, unlike in the Periodic system, the elements do not exhibit their natural relationships with one another.
The elements that make up group 17 of the periodic table are the halogens. They are nonmetals that are reactive, such as iodine, bromine, chlorine, and fluorine. Halogens are non-metals that are very reactive. These substances share a lot of characteristics with one another.
Thus, the electron configuration of alkali metals would then resemble those of group 17 of the periodic table in the compounds they form.
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Neurons that are rare, small, and lack features that distinguish dendrites from axons are called.
Answer:Anaxonic Neurons
Explanation:
which property is a chemical property of a substance
Answer:
reactivity, flammability,toxicity some more
How are biofuel prepared?
Answer:
fermentation of crops that are high in sugar (starch) or fat into ethanol,
Explanation:
an 11.0 gram sample of cacl2 is dissolved in 125 g of water with both substances at 25.0 c. calculate the final tmeperature of the solution assuming no heat lost to the surroundings and assuming the solution has a specific heat capacity of 4.18j/gc
40.4 C
So far q(rxn) = q(water) + q(CaCl2) (136g)(4.184J/°Cg)(Tfinal - 25.0°C) = (125g)(4.184)(Tfinal - 25.0°c) + (11g)c(Tfinal - 25.0°C).
The specific heat capacity is measured in J/(kg K) or J/(kg °C), and it is the amount of heat (J) absorbed per unit mass (kg) of the material when its temperature rises by 1 K (or 1 °C).The average kinetic energy of the atoms or molecules in the system is measured by temperatures. The zeroth law of thermodynamics states that when two objects are in thermal equilibrium, no heat is transferred between them, resulting in an equalisation of their temperatures.
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in an experiment, 4.14 g of phosphorus combined with chlorine to produce 27.8 g of a white solid compound. (a) what is the empirical formula of the compound? (b) assuming that the empirical and molecular formulas of the compound are the same, what is its name?
PCL₅ is the empirical formula of the compound.
Phosphorous pentachloride is it's if empirical formula and molecular formula are assumed to be the same.
Empirical formula is the lowest relative ratios of atoms that are present in a molecule or compound. It shows the simplest ratio and not the actual number of atoms hence should not be confused with molecular formula.
quantity of phosphorus : 4.14g
quantity of white compound after combining with chlorine : 27.8g
therefore quantity of chlorine = 27.8g - 4.14g => 23.66g
Molecular weight of Phosphorus: 30.97g
Molecular weight of Chlorine: 35.45g
For no. of moles= given weight / molecular weight
Moles of phosphorus= 4.14g / 30.97 => 0.1337 moles
Moles of Chlorine= 23.66g / 35.45 => 0.6674 moles
For empirical formula, we divide with the smaller entity i.e. 0.1337
Phosphorus: 0.1337 / 0.1337 => 1
Chlorine: 0.6647 / 0.1337 => 5
hence the empirical formula is PCL₅
Name of the compound : Phosphorus pentachloride
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1) H2(g)+I2(g)⇌2HI(g). Why does the reaction occur only in the forward direction at first?
2) During the reaction, how does the rate of the forward direction compare to the rate of the reverse direction?
The reaction has a low activation energy and mostly of the reactants are converted into products hence the reaction tends to occur in the forward direction
2) The rate of the reverse reaction is too small compared to the rate of the forward reaction.
What is the reaction?The term reaction has to do with the interaction that occurs between the reactants and the products. Thus as the reactants interacts, a new substance is formed and then we have new substances and they are called the products. Looking at the reaction as it is written in question (1), we can see that the there is a complete and total interaction that occurs as all the reactants are converted into products. Given the fact that all the reactants are converted into products, the reactions can only proceed forward.
In this reaction, we can see from the equation that the reaction is reversible. This means that the reaction is able to occur in both directions; forward and backwards. This reactions proceeds mostly forward hence the rate of reverse reaction is infinitesimal compared to the rate of the forward reaction.
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A university class has 12 students enrolled, 2 of whom are graduate students.
What is the probability that a randomly chosen student will be a graduate
student?
Write your answer as a fraction or whole number.
P(graduate student)
=
Answer:
Answer 1/6
Explanation:
this table shows the acceleration due to gravity on four different planets what planet is a person standing on if the person has a mass of 85.0 kg and weighs 305 N mercury is 3.59 Venus 8.87 Earth 9.81 mars 3.77
A.mercury
B.Venus
C.earth
D. Mars
Option C. The character has a mass of 85. zero kg and weighs 305 N mercury is three.59 Venus is eight.87 Earth is 9. eighty-one mars three.77: C.earth
Earth is expected to be 4.54 billion years old, plus or minus about 50 million years. Scientists have scoured the Earth looking for the oldest rocks to radiometrically date. In northwestern Canada, they determined rocks approximately four.03 billion years vintage.
The earliest existence on earth might have been just as purple as its miles green nowadays, a scientist claims. ancient microbes might have used a molecule other than chlorophyll to harness the solar rays, one which gave the organisms a violet hue. The third planet from the sun, Earth is the handiest region in the acknowledged universe shown to host existence. With a radius of 3,959 miles, Earth is the 5th largest planet in our sun machine, and it's the handiest one regarded as positive to have liquid water on its floor. Earth is also unique in phrases of monikers.
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acetic acid has a molar mass of 60.05 g/mol and consists of 40.00% c, 6.714% h, and 53.29% o with an empirical formula of ch2o . what is the molecular formula of acetic acid?
The molecular formula of acetic acid is C[tex]_2[/tex]H[tex]_4[/tex]O[tex]_2[/tex].
In 100 g of sample of acetic acid,
the concentration of Carbon (C) is 40 g,
the concentration of Hydrogen (H) is 6.714 g,
the concentration of Oxygen (O) is 53.29 g
To calculate the no. of moles, mass is divided by molar mass.
Therefore, no. of moles of C = 40/12 = 3.33
No. of moles of H = 6.714/1 = 6.71
No. of moles of O = 53.29/16 = 3.33
As the ratio of the elements is 1C : 2H : 1O, thus, empirical formula is CH[tex]_2[/tex]O
The molecular mass of the empirical formula CH[tex]_2[/tex]O is 12 + 1(2) + 16 = 30g/mol. Since the molar mass of acetic acid is 60.05 g/mol and the molecular mass of the empirical formula was found to be 30 g/mol, the subscripts of the empirical formula are multiplied by (60.05/30) 2, to get the molecular formula. Thus the molecular mass of acetic acid will be C[tex]_2[/tex]H[tex]_4[/tex]O[tex]_2[/tex]
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Would you expect the equivalence point ph of the wasb to be slightly acidic, neutral, or slightly basic? how does this compare to the sasb equivalence point ph?.
the WASB has a slightly acidic equivalence point and SASB has a slightly basic equivalence point. This is because WASB has a higher concentration of hydronium ions than SASB.
Hydronium ions play an important role in acid-base reactions. It is the hydrogen ion that is released or taken up in the acid-base reaction. The higher the concentration of hydronium ions, the more acidic the solution. In an acid-base reaction, an acid donates a hydrogen ion to a base. Bases accept hydrogen ions. This creates new water molecules. The equivalence point is the point at which an acid and a base react with 1:1 ratio. At this point the solution is neutral. If the acid has a higher concentration of hydronium ions than the base, the equivalence point is slightly acidic. This is due to the presence of more hydronium ions than at the start of the reaction. If the base has a higher concentration of hydronium ions than the acid, the equivalence point is slightly basic.
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2. What is the frequency of an electromagnetic wave that has an energy of 9.89 x 10-18 J?
a. Known values:
b. Equation:
C. Work:
d. Answer:
The frequency of electromagnetic waves with an energy of 9.89×10-18 J is 1.492 ×10^16 Hz.
What are electromagnetic waves?
These are the waves created due to the vibration caused between two fields, i.e., electric field and magnetic field.
In simple words, it originates from the oscillating magnetic and electric field. The electromagnetic spectrum gives us a range of frequency, wavelength and Energies.
It is used to classify the electromagnetic waves and arrange them according to their order of frequencies and wavelength.
Frequency = Energy/ Planck's constant
f= E/h
h=6.626×10^-34 J s
⇒9.89×10^-18/6.626×10^-34
⇒1.492×10^16 Hz.
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On US Interstate system, the maximum speed is 121km/h. How far will you travel if you
maintained this speed for 3 hours and 20 minutes?
The distance that will be traveled by me on the US interstate system will be 403.3 km.
What is distance?Distance is the total length between two points. Distance is the total movement of an object without any regard to direction. We can define distance as to how much ground an object has covered despite its starting or ending point.
To calculate the distance traveled;
d = Vt
Where;
d = Distance traveled by me
V = Maximum speed
t = Time
Given:
V = 121 km/h
t = 3 hours 20 minute = 10/3 hours
Substituting the values in the formula
d = 121×10/3
d = 403.3 km
In conclusion, the distance traveled by me will be 403.3 km.
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If the students replaced the rocket with one that has DOUBLE the MASS,
what would expect to see in the motion of the rocket?
Answer:
nothing common dude
Explain why you selected the rock you did in Question 1. Which characteristics helped you make a decision?
You take in that you need to make a decision. Try to notice and define the nature of the decision you must make. This first step is very important.
What are the first characteristics of decision-making?Decision-making requires the identification and selection of alternatives on the basis of values, linking, requirements, and beliefs. To begin the procedure objectives must be defined, classified, and ordered in the order of their importance. Decision-making involves the recognition and selection of alternatives on the basis of values, preferences, concerns, and beliefs. Decision-making means selecting a course of action from two or more alternative strategic decision-making (SOM) is of great and growing importance.
So we can conclude that attribute of Decision Making · It is a process of selecting a course of action from among the alternative courses of action.
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how many grams of ammonia must you start with to make 10,000. l of a 0.7500 m aqueous solution of nitric acid? assume all the reactions give 100% yield.
we need these set of reactions that goes from ammonia to nitric acid.
1) 4NH3(g)+5O2(g)-->4NO(g)+6H2O(g)
2) 2NO(g)+O2(g)-->2NO2(g)
3) 3NO2(g)+H2O(l)-->2HNO3(aq)+NO(g)
State the ratio of moles of HNO3 to NH3:
4 moles of NH3 produce 4 moles of NO,
4 moles of NO produce 4 moles of NO2
4 moles of NO2 produce 4 * (2 / 3) moles of HNO3 = 8/3 moles of HNO3.
=> (8/3) moles HNO3 : 4 moles NH3
Calculate the number of moles of HNO3 in 10000 l of 0.7500 M solution
M = n / V => n = M * V = 0.7500 M * 10000 liter = 7500 moles HNO3
Use proportions:
(8/3) moles HNO3 / 4 moles NH3 = 126 moles HNO3 / x
=> x = 7500 moles HNO3 * 4 moles NH3 / (8/3 moles HNO3) = 11279 moles NH3
Convert moles to grams:
molar mass NH3 = 14 g/mol + 3 * 1g/mol = 17 g/mol
mass in grams = number of moles * molar mass = 11279 moles * 17 g/mol = 191743 g
Answer: 191743 g.
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A chemist runs the following decomposition reaction: C2H6 → 2 C + 3 H2
If she starts with 50.0 g of C2H6, how many grams of carbon will be made?
what is the heat of a reaction, in joules, with a total reaction mixture volume of 70.6 ml if the reaction causes a temperature change of 6.1 oc in a calorimeter? assume that the reaction mixture has a density of 1.00 g/ml and a specific heat of 4.184 j/g-oc. the calorimeter has a heat capacity of 10.0 j/oc.
With density 1.00 g/ml and a specific heat of 4.184 j/g we can see that the heat of the chemical reaction in joules is H = 1,596 J
We are given
Total volume of the mixture = 70.6 ml
Change in temperature = 6.1 °C
Density of reaction mixture = 1.00 g/ml
Specific heat of water = 4.184 J/g = 4200 J/Kg
Now Density = mass/volume
Mass of water = Density × volume
Mass of water = 1 g/mL × 62.3 mL
Now in order to find heat in joules, let's use the formula.
H = mcθ
m = mass of water
c = heat capacity of water
θ = temperature rise
Now substituting the values we get
H = 0.0623 Kg × 4200 J/Kg × 6.1 °C
H = 1,596 J = 1.5 KJ
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The distance of a doorknob from the floor is about 1
The ideal distance between a doorknob and the the ground floor is 34 inches.
How far should a doorknob and floor?In a lay man language, a doorknob simply refers to the handle which is usually used to hold doors in order to open or close the door. Every door of a building regardless of its size or location in the building must have a knob to always hold it with .
However, from the task given above, a doorknob should be at least 34 inches from the floor under normal circumstances.
In conclusion, it can be deduced from the simple explanation above that a doorknob should be ideally 34 inches from the floor of the house or building.
Complete question:
What should be the ideal distance between the doorknob from the floor?
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at the standard temperature , the pressure inside an lp [propane] gas cylinder is 883 kpa. what is , the absolute pressure inside the gas cylinder when it is full, and when it is completely empty?
984 kpa is the absolute pressure of gas cylinder when full.
101 kpa is the absolute pressure of gas cylinder when it’s empty.
Pressure is the force exerted on a particular surface area and we know that Absolute pressure is equal to the sum of gauge pressure and atmospheric pressure .Barometric pressure is the best example for absolute referenced pressure. Absolute pressure is measured in N/m² or pascal & kpa which is short for kilopascal
P(absolute)=P(gauge)+P(atm)
Here P(gauge) is pressure due to the contents present inside the cylinder
P(atm) is the pressure exerted by the atmosphere
=>883 kpa+101 kpa =984 kpa when full
Note that when the cylinder is empty the gauge pressure is zero as there is no substance to exert pressure So, only atmospheric pressure is exerted.
P(absolute)=0(because the cylinder is empty) + 101 kpa
Therefore P(absolute) =101 kpa when cylinder is empty.
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Can yall help me with this
Answer:
A.
Explanation:
A probe was sent to record the event
a gas mixture used for anesthesia contains 2.83 mol oxygen (o2), and 8.41 mol of nitrous oxide (n2o). the total pressure of the mixture is 192 kpa. what is the partial pressure of n2o?
partial pressure of n2o in the gas mixture was found to be 143.6 kPa
what is partial pressure?
Each gas that makes up a mixture of gases has a partial pressure, which represents the pressure that would exist if that gas alone had filled the complete volume of the initial mixture at the same temperature. According to Dalton's Law, the partial pressures of the individual gases make up the overall pressure of a perfect gas combination.
A gas's partial pressure is a gauge of its molecules' thermodynamic activity. However, unlike liquids or gas mixtures, gases behave differently depending on their partial pressures when dissolving, diffusing, and reacting. This characteristic of gases often holds true for gas chemical reactions in biology.
As per the data give
Moles (o2) = 2.83 mol
Moles (n2o) = 8.41 mol
Total pressure = 192 kPa
so the total number of moles should be calculated
Total No.of moles = no of moles in o2 + no of moles in n2o = 2.83 + 8.41 = 11.24 mol
mole fraction for n2o
Mole fraction = moles of compound/ Total moles
Mole fraction for n2o = 8.41 / 11.24 = 0.748
so now calculate the partial pressure of n2o
pn2o = 0.748 192 kPa
pn2o = 143.6 kPa
therefore the partial pressure of the n2o was 143.6 Kpa
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one gram of cd(oh)2(s) is then dispersed in 1.0 l of the solution containing 1 mg/l of cd2 . once the system reaches equilibrium, what is the concentration of cd2 ?
The concentration of Cd⁺² is 8.8×10⁻⁶mol/lit.
What does the term equilibrium mean?When there is no tendency for reactant and product quantities to fluctuate, a chemical reaction is in equilibrium. It is up to us to decide which components of a chemical reaction are deemed reactants and which are products, as well as the direction in which we write about them.
Cd(OH)₂ → Cd⁺² +2OH⁻
↓
1mg/lit
Mass of Cd⁺² ⇒ 1mg/L×1 lit
Mass of Cd⁺² ⇒ 10⁻³gm
Mole of Cd⁺² → 10⁻³/112.4g/mol
Mole of Cd⁺² → 0.0088×10⁻³
Volume of Cd⁺² → 1Lit
Concentration of Cd⁺² →0.0088×10⁻³/1
Concentration of Cd⁺² → 8.8×10⁻⁶mol/lit.
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