Answer:
N2O5
Explanation:
Empirical formular is the simplest formular of a compound and shows the atoms present in simple rations.
Molecular formular on the other hand shows the exact number of atoms of element present in a compound.
To obtain molecular formular from empirical formular;
(Empirical formular)n = Molar mass
where n is a simple integer.
(N2O5)n = 108 g/mol
Molar mass of N2O5 = 108 g/mol
(108) n = 108
n = 108 / 108 = 1
Molecular formular = (Empirical formular)n
Molecular formular = (N2O5)*1 = N2O5
In this question, the empirical formular is the same as the molecular formular
Which particle has a higher rate of deposition
Answer:it’s c
Explanation:
Edge 2021
HOW CAN I DO AN EXPERIMENT WITH THIS THINGGGG I-
Answer:
omg i love grass hopperszszszs
Explanation:
you should give it a mate
What is the percent by mass if 110 g of baking soda is dissolved in 125 g of water to make 235 g of solution?
Answer: The percent by mass of baking soda in the solution is approximately 46.81%.
Explanation:
Percent by mass is calculated as the mass of solute (baking soda) divided by the mass of the solution (baking soda + water) and then multiplied by 100.
In this case:
Mass of baking soda (solute) = 110 g
Mass of water (solvent) = 125 g
Mass of solution = 110 g + 125 g = 235 g
Percent by mass = (mass of baking soda / mass of solution) x 100
Percent by mass = (110 g / 235 g) x 100 ≈ 46.81%
The percent by mass of baking soda in the solution is approximately 46.81%.
Please help.. I'm Giving Brainliest :)
Answer:
i think its -91.6
Explanation:
2 ( - 950.8) - (( - 1130.7) + ( - 393.5) + ( - 285.8))
The standard enthalpy change for the given reaction is approximately 91.9 kJ mol⁻¹.
The heat produced during a chemical reaction under specific conditions is known as the standard enthalpy change, abbreviated as H° (zero delta H). Standard conditions often refer to all reactants and products in their standard states, which are their most stable forms at 298 K and 1 bar (or 1 atm) pressure.
Hess's law, which states that the total enthalpy change of a reaction is equal to the sum of the enthalpy changes of its component phases, is used to calculate the standard enthalpy change of the reaction.
The following reaction is given:
\(\rm 2 NaHCO_3(s)--- > Na_2CO_3(s)+ CO_2(g) + H_2O(l)\)
The relevant enthalpy changes of formation are:
ΔH°[NaHCO3(s)] = -950.8 kJ mol⁻¹
ΔH°[Na2CO3(s)] = -1130.7 kJ mol⁻¹
ΔH°[CO2(g)] = -393.5 kJ mol⁻¹
ΔH°[H2O(l)] = -285.8 kJ mol⁻¹
By using Hess's Law, the standard enthalpy change (ΔH°) for the reaction can be calculated as follows:
ΔH° = Σ (products) - Σ (reactants)
ΔH° = [ΔH°[\(\rm Na_2CO_3\)(s)] + ΔH°[\(\rm CO_2\)(g)] + ΔH°[H2O(l)]] - [2 × ΔH°[\(\rm NaHCO_3\)(s)]]
ΔH° = [-1130.7 kJ mol⁻¹ + (-393.5 kJ mol⁻¹) + (-285.8 kJ mol⁻¹)] - [2 × (-950.8 kJ mol⁻¹)]
ΔH° = [-1809.7 kJ mol⁻¹] - [-1901.6 kJ mol⁻¹]
ΔH° ≈ -1809.7 kJ mol⁻¹ + 1901.6 kJ mol⁻¹
ΔH° ≈ 91.9 kJ mol⁻¹
Hence, the standard enthalpy change for the given reaction is approximately 91.9 kJ mol⁻¹.
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A 20. mL sample of 0.50MHC2H3O2(aq) is titrated with 0.50MNaOH(aq). Which of the following best represents the species that react and the species produced in the reaction? (A) H+(aq)+OH−(aq)→H2O(l)
(B) H+(aq)+C2H3O2−(aq)+Na+(aq)+OH−(aq)→H2O(l)+NaC2H3O2(aq)
(C) HC2H3O2(aq)+OH−(aq)→C2H3O2−(aq)+H2O(l)
(D) HC2H3O2(aq)+NaOH(aq)→H2O(l)+Na+(aq)+C2H3O2−(aq)
The best representation of the species that react and the species produced in the reaction is; HC₂H₃O₂(aq) + NaOH(aq) → H₂O(l) + Na⁺(aq) + C₂H₃O₂⁻(aq). Option D is correct.
In this titration reaction, a strong base (NaOH) is reacting with a weak acid (HC₂H₃O₂). The reaction between HC₂H₃O₂ and NaOH is a neutralization reaction, where the hydrogen ion (H⁺) from the acid combines with the hydroxide ion (OH⁻) from the base to form water (H₂O).
The sodium ion (Na⁺) and the acetate ion (C₂H₃O₂⁻) are spectator ions and are not involved in the actual reaction. They are present as ions in the solution but do not participate in the chemical change.
Therefore, the correct representation of the species that react and the species produced in the reaction is:
HC₂H₃O₂(aq) + NaOH(aq) → H₂O(l) + Na⁺(aq) + C₂H₃O₂⁻(aq).
Hence, D. is the correct option.
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through electrolysis, a student collects 14.2 g of hydrogen gas and 112.8 g of oxygen gas. the reaction was allowed to proceed to completion. what was the mass of water initially present?
The mass of water initially present is 127 grams.
Mass cannot be created or destroyed, under the law of conservation of mass. As a result, the mass of reactants and products must be equal. Each element must have the same number of atoms on both the reactant and product sides. The balanced Chemical equations are :
2H₂O ⇒ 2H₂ +O₂
mass of hydrogen = 14.2 g
mass of oxygen = 112.8 g
Mass of products = Mass of hydrogen + mass of oxygen = 14.2+ 112.8 = 127 g grams
Thus mass or reactant = mass of water
Mass of reactants = mass of products = 127 g
Therefore the mass of water initially present is 127 grams.
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Convert the following Fahrenheit temperatures to the Celsius and Kelvin scales.
a. –459°F, an extremely low temperature
b. –40.°F, the answer to a trivia question
c. 68°F, room temperature
d. 7 × 107 °F, temperature required to initiate fusion reactions in the sun
The conversion of the following Fahrenheit temperatures to the Celsius and Kelvin scales are as follows:
a. –459°F, an extremely low temperature = -273 °C; 0 K
b. –40.°F, the answer to a trivia question = -40°C; 233.15 K
c. 68°F, room temperature = 20°C; 293.15 K
d. 7 × 10⁷ °F, temperature required to initiate fusion reactions in the sun = 3.85 × 10⁷ °C; 3.85 × 10⁷ K
a. –459°F, an extremely low temperature
When we have to convert a given temperature from Fahrenheit to Celsius, we use the following formula:
F = 9/5 C + 32
Where C is the Celsius temperature and F is the Fahrenheit temperature.
(i) To convert -459°F to Celsius, we have to put the value in the above formula and get the Celsius temperature.
F = 9/5 C + 32
-459 = 9/5 C + 32
C = (-459 - 32) × 5/9 = -273 °C is the Celsius temperature of -459°F
(ii) To convert -459°F to Kelvin, we add 273 to the Celsius temperature.
K = C + 273
K = -273 + 273 = 0 K is the Kelvin temperature of -459°F.
b. –40.°F, the answer to a trivia question
(i) To convert -40°F to Celsius, we use the given formula.
F = 9/5 C + 32
-40 = 9/5 C + 32
C = (-40 - 32) × 5/9 = -40°C is the Celsius temperature of -40°F.
(ii) To convert -40°F to Kelvin, we first convert the Celsius temperature to Kelvin by adding 273.15.
K = C + 273.15
K = -40 + 273.15 = 233.15 K is the Kelvin temperature of -40°F.
c. 68°F, room temperature
(i) To convert 68°F to Celsius, we use the given formula.
F = 9/5 C + 32
68 = 9/5 C + 32
C = (68 - 32) × 5/9 = 20°C is the Celsius temperature of 68°F.
(ii) To convert 68°F to Kelvin, we first convert the Celsius temperature to Kelvin by adding 273.15.
K = C + 273.15
K = 20 + 273.15 = 293.15 K is the Kelvin temperature of 68°F.
d. 7 × 10⁷ °F, temperature required to initiate fusion reactions in the sun
(i) To convert 7 × 10⁷ °F to Celsius, we use the given formula.
F = 9/5 C + 32
7 × 10⁷ = 9/5 C + 32
C = (7 × 10⁷ - 32) × 5/9 = 3.85 × 10⁷ °C is the Celsius temperature of 7 × 10⁷ °F.
(ii) To convert 7 × 10⁷ °F to Kelvin, we first convert the Celsius temperature to Kelvin by adding 273.15.
K = C + 273.15
K = 3.85 × 10⁷ + 273.15 = 3.85 × 10⁷ K is the Kelvin temperature of 7 × 10⁷ °F.
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what is the mass of 1.20 x 1024 molecules of sulfur dioxide, so2?
The mass of 1.20 x 1024 molecules of sulfur dioxide is 4.02 x 10^27 g.
First, find the molar mass of sulfur dioxide, SO2.
Molar mass of sulfur (S) = 32.07 g/mol, Molar mass of oxygen (O) = 15.999 g/mol, Molar mass of SO2 = (2 × 15.999 g/mol) + 32.07 g/mol = 64.066 g/mol.
Use the molar mass of SO2 to convert the given number of molecules to grams.
1 mole of SO2 = 64.066 g
1 mole of SO2 contains 6.022 x 10^23 molecules of SO2
Therefore, 1.20 x 1024 molecules of SO2 = (64.066 g/mol) × (1.20 x 1024/6.022 x 10^23 mol^-1) = 4.02 x 10^27 g
Therefore, the mass of 1.20 x 1024 molecules of sulfur dioxide is 4.02 x 10^27 g.
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Chlorine displaces iodine from a solution of sodium iodide in a redox reaction.
The equation for this reaction is shown.
Cl₂ + 2NaI—>2NaCl + I₂
Which statement about this reaction is correct?
A Chlorine is the oxidising agent and it oxidises iodide ions.
B Chlorine is the oxidising agent and it reduces iodide ions.
C Chlorine is the reducing agent and it oxidises iodide ions.
D Chlorine is the reducing agent and it reduces iodide ions.
Answer:
(A) chlorine is an oxidizing agent in this reaction so it oxidize iodine and it itself is reduced
Explanation:
Cl2 oxi no. = 0 became Cl- oxi no. = -1
so it is reduced
I- oxi no. = -1 became I2 oxi no. = 0
so it oxidized
How much has co2 increased in the atmosphere since 1750? group of answer choices
Since 1750, about 46 percent of CO2 is increased in the atmosphere.
Co2 gas is considered as Greenhouse effect.
Green house effect : The trapping of the sun's warmth in a lower atmosphere of planet, due to the more and more transparency of the atmosphere to visible radiation from the sun than the infrared radiation which are emitted by the surface of the planet.
Due to greenhouse effect the temperature of earth surface increases.
Many reasons for increase in Greenhouse effect are as follow:
DeforestationBurning of fossil fuels.FarmingIndustrial waste and landfills. Global warmingdepletion of ozone layerAir pollutionDue to these reason the percentage of CO2 in the atmosphere is increased by 46.
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How is burning magnesium different from burning methane?
Answer:
oxygen and magnesium come together in a chemical to form a reaction to it compound after it burns then it forms white powder of magnesium oxide but in the process magnesium gives up 2 electrons to oxygen atoms to form powdery product.
when you burn methane it crrates a blue flame in sufficient amounts of oxygen methane burns to give off carbon dioxide (Co2) and water (H2o)
what is the volume of 1.00 mole of H2
Answer:
22.414 \(dm^{3}\) at S.T.P and 24 \(dm^{3}\)
Explanation:
Volume of one mole of gas at standard temperature and pressure, stp, (0 °C, 1 atm) is 22.4 dm3. At room temperature and average pressure, rtp, the volume of any gas is approximately 24 dm3.
Please help me answer the questions I need help
Answer:
atomic radius decreased from left to right
electrons in an atom increases
causing the atom to shrink
atom radius increased down a group
additional energy level is added
Calculate the number of atoms in 24.83g calcium phosphate.
Avogadro's Number:
Avogadro's number, which is equal to 6.02214076 x \(10^{23}\) , is the quantity of units in one mole of any material. Hence, 1 mole of calcium phosphate,\(Ca_{3} (PO_{4}) _{2}\) will contain 6.02214076 x \(10^{23}\) atoms.
The molar mass of calcium phosphate is 310.18 g/mol,
Then, number of moles in 24.83g of calcium phosphate = \(\frac{mass}{molar mass}\)
= \(\frac{24.83}{310.18}\)
= 0.08 mole
Then, 0.08 mole of \(Ca_{3} (PO_{4}) _{2}\) will contain,
= 0.08 moles x 6.02214076 x \(10^{23}\) atoms
= 0.4818 x \(10^{23}\) atoms = 4.818 x \(10^{22}\) atoms.
Hence, 0.08 mole of calcium phosphate will contain 4.818 x \(10^{22}\) atoms.
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longitudinal weak or transverse ?
Answer:
Light behaves as a Transverse Wave.
First period in the periodic table has ____ elements and they are called____
We need ti find how many elements there are in the first period and what are these.
To know what is the first period we must use that
Seeing the periodic table, the first row has two elements.
We can see that these elements are H ( hydrogen ) and He ( helium ).
ANSWER:
Firs period in the periodic table has two elements and they are called hydrogen and helium.
The table shows the relative atomic masses of some common elements. use this information to work out the relative formula mass of hydrochloric acid. give your answer to 1 decimal place.
To work out the relative formula mass of hydrochloric acid (HCl), we need to consider the relative atomic masses of hydrogen (H) and chlorine (Cl). After calculations, it is found that the relative formula mass of hydrochloric acid (HCl) is 36.5, rounded to 1 decimal place.
Hydrogen (H): 1.0, Chlorine (Cl): 35.5.
The formula for hydrochloric acid is HCl, indicating that there is one hydrogen atom and one chlorine atom in each molecule.
To calculate the relative formula mass, we add the relative atomic masses of hydrogen and chlorine.
The relative formula mass of HCl = Relative atomic mass of H + Relative atomic mass of Cl = 1.0 + 35.5.
= 36.5.
Therefore, the relative formula mass of hydrochloric acid (HCl) is 36.5, rounded to 1 decimal place.
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what mineral might contribute to hypertension if eaten in excess?
The main minerals that may contribute to hypertension when consumed in excess include sodium, potassium, and calcium.
Eating too much of certain minerals can lead to hypertension, a condition that can cause high blood pressure.
Too much sodium can cause the body to retain water, leading to increased blood pressure.
Potassium can also affect blood pressure, as it influences the amount of sodium in the body.
Calcium is important for regulating the contraction and relaxation of muscles, including those of the heart. When calcium levels become too high or excess, it may lead to hypertension.
Therefore, it is important to keep an eye on your mineral intake to ensure that it remains within healthy limits.
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Somebody please help me with this problem!!
Explanation:
I guess since it has greater number on ions it won't react as heavily as the others, I'm going based off of atoms.
this ionic compound is named incorrectly.
1. find and describe the mistake
2. correctly name the compound
CaCl² - Calcium Chlorine
CuS - Copper Sulfide
Li³P - Trilithium Phosphide
CuBr - Copper(II) Bromide
NaOH - Sodium Hydrogen Oxide
1. Ionic compounds are named using the cation and the anions in the compounds respectively.
The name of the cation remains thesame as it's element while the anions name changes by adding another suffix to the elements name.
Sometimes, the number of positive charge of a cation is added in front of it's name before adding the anion's name.
2. Correct names of the compounds above
CaCl² - Calcium chloride
CuS - Copper Sulphate
Li³P - Lithium Phosphide
CuBr - Copper (1) Bromine
NaOH - Sodium Hydroxide
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When naming a compound, which of these is written first?
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2. Which of the following reasons is why chemical equations are balanced?
Answer:Chemical equations must be balanced to satisfy the law of conservation of matter, that states that matter cannot be produced or destroyed in a closed system. The law of conservation of mass governs the balancing of a chemical equation.
Explanation:
0. 01 M HCl solution has a pH of 2. Suppose that during the experiment, both the universal pH indicator and the cabbage indicator turn orange-red for 0. 01 M HCl. What can you conclude about the the cabbage indicator key? It matches the universal pH indicator and is indicating the proper pH. It should completely match the universal indicator key for all pH values greater than 7 (base). It should completely match the universal indicator key for all pH values. There was some sort of experimental error, because the indicators should never match.
Answer:
a.) It matches the universal pH indicator and is indicating the proper pH.
Explanation:
it says its the answer.
Answer:
Explanation:
An object is thrown vertically from the ground upwards with a speed of 10 m/s. Considering g = 10 m/s2, the maximum height that the object reaches from the ground, in meters, will be:
a) 15.0.
b) 10.0.
c) 5.0.
d) 1.0.
e) 0.5.
A reaction balanced when it shows us the_____ number of atoms are present before and after the reaction.
Answer:
equal
Explanation:
According to the law of conservation of matter, the number of atoms before and after a chemical reaction should be equal, such that no atoms are, under normal circumstances, created or destroyed.
PLEASE ANSWER ASAP!
For her school Science ft Alyssa designs an experiment to learn more about
erosion. Her experimental set up is shown below
Using the illustration shown above, determine which of the following statements best
describes the independent variable itest variable). this experiment:
A The speed she pours the water, since it is the same for all trials.
B The amount of water she pours, because the amount she pours is the same.
C The height of the tray, because this is a change that may cause and effect on the experiment.
D The mass of sand that collects at the bottom of the tray, because this is what is being measured or observed.
Answer:A
Explanation:
To do the experiment
The experimental setup is the part of the scientific method that is done to prove the hypothesis. The test variable of the experiment is the height of the tray as it may cause an effect. Thus, option C is correct.
What is the independent variable?The independent variable has been the test variable that does not depends on other variables and is manipulated by the researcher. It has no fixed value and parameter and is subject to alteration so as to cause an effect on the other variable.
The height of the tray is the independent variable and the mass of the sand is the dependent variable. The height affects the mass of the sand eroded at the bottom. The speed and amount of water have been the controlled variable.
Therefore, option C. the height of the tray with the sand is the independent variable.
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Pls Help pls pls pls answer all the questions like this
1. your answer
2. your answer
3. your answer
FAST PLS I NEED AN 100%!!!!
Answer:
a person walking, a thrown baseball, a crumb falling from a table---- kinetic energyA raised weight.,Water that is behind a dam,A car that is parked at the top of a hill.----potential energy
The second law of thermodynamics is a physical law based on universal experience concerning heat and energy interconversions.
Determine the volume in cm3 of 7.2 x 10-4 m3 ?
Answer:
The volume of \(7.2\times 10^{-4}\ m^3\) is equal to 720 cm³.
Explanation:
We know that,
1 m = 100 cm
We need to convert \(7.2\times 10^{-4}\ m^3\) to cm³.
Also,
1 m³ = 10⁶ cm³
To convert \(7.2\times 10^{-4}\ m^3\) to cm³, the step is as follows :
\(7.2\times 10^{-4}\ m^3=(7.2\times 10^{-4}\times 10^6 )cm^3\\\\=720\ cm^3\)
So, \(7.2\times 10^{-4}\ m^3\) is equal to 720 cm³.
plz help with 1 i don’t know what to answer as!!
Answer: results are based on a small sample size
Explanation:
the other answers wouldnt make sense
Answer:
A. It can be reproduced.
Explanation:
I saw the other answer and I have to disagree. A small scale experiment wouldn't have much data so it may not be completely accurate. If it can be reproduced it means it is possible and has the same results. Scientists copy each other's things to prove or disprove them (this also goes with how it should be reviewed by peers)
everything else wouldn't make sense
if a student reacts 4.40 ml of acetic acid with 3.35 ml of isopentyl alcohol and obtains 3.25 ml of isopentyl acetate as the product, what was the percent yield
The percent yield of isopentyl acetate is 71.23% when reacting 4.4 ml f acetic acid with 3.35 ml of isopentyl alcohol
Percentage yield calculationPercentage yield can be defined as the ratio of the actual yield of a reaction to the theoretical yield of a reaction, multiplied by 100.
The percentage yield is calculated as follows:
Percentage yield = (actual yield/theoretical yield) × 100Given data:
Volume of acetic acid used = 4.40 ml
Volume of isopentyl alcohol used = 3.35 ml
Volume of isopentyl acetate obtained = 3.25 ml
Density of acetic acid = 1.049 g/mL and its molar mass = 60.05 g/mol
Density of isopentyl alcohol = 0.809 g/mL and its molar mass = 88.15 g/mol
Density of isopentyl acetate = 0.876 g/mL and its molar mass = 130.19 g/mol
The balanced chemical equation for the reaction is:
C5H11OH + CH3COOH → CH3COOC5H11 + H2O
First, we need to determine which reactant is the limiting reactant. We can do this by calculating the number of moles of each reactant:
Number of moles of acetic acid = (volume in mL) x (density) / (molar mass)Number of moles of acetic acid = (4.40 mL) x (1.049 g/mL) / (60.05 g/mol) = 0.0767 molNumber of moles of isopentyl alcohol = (volume in mL) x (density) / (molar mass)Number of moles of isopentyl alcohol = (3.35 mL) x (0.809 g/mL) / (88.15 g/mol) = 0.0307 molThe mole ratio of acetic acid to isopentyl alcohol in the reaction is 1:1, so the limiting reactant is isopentyl alcohol because there are fewer moles of it.
The theoretical yield of isopentyl acetate can be calculated from the number of moles of limiting reactant:
Number of moles of isopentyl acetate = (number of moles of limiting reactant) = 0.0307 molNow we can calculate the percent yield:
Percent yield = (actual yield / theoretical yield) x 100%The actual yield is given as 3.25 mL of isopentyl acetate, but we need to convert this to moles:
Number of moles of isopentyl acetate = (volume in mL) x (density) / (molar mass)Number of moles of isopentyl acetate = (3.25 mL) x (0.876 g/mL) / (130.19 g/mol) = 0.022 molPercent yield = (0.022 mol / 0.0307 mol) x 100% = 71.23%Therefore, the percent yield of isopentyl acetate is 71.23%.
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The atomic symbol superscript 206 subscript 82 upper p b. represents lead-206 (pb-206), an isotope that has 82 protons and 124 neutrons. which atomic symbol could represent an isotope that undergoes radioactive decay to produce pb-206? superscript 238 subscript 92 upper u. superscript 222 subscript 87 upper p b superscript 178 subscript 72 upper h f. superscript 192 subscript 77 upper p b.
Answer: The atomic symbol represent an isotope that undergoes radioactive decay to produce Pb-206 can be, Polonium (Po).
Calculate the mole fraction of each component in a solution of 42 g CH3OH, 35 g of chloroform CHCl3, and 50 g C3H7OH
Considering the definition of mole fraction, the mole fraction of each component in the solution is:
CH₃OH: 0.54 CHCl₃: 0.118C₃H₇OH: 0.342Mole fractionThe molar fraction is a way of measuring the concentration that expresses the proportion in which a substance is found with respect to the total moles of the solution.
Mole fraction of each component
In this case, in first place you should know that the molar mass of each component is:
CH₃OH: 32 \(\frac{g}{mole}\) CHCl₃: 121.35 \(\frac{g}{mole}\)C₃H₇OH: 60 \(\frac{g}{mole}\)Now, the number of moles of each compound can be calculated as:
CH₃OH: \(\frac{42 g}{32\frac{g}{mole}}\)= 1.3125 molesCHCl₃: \(\frac{35 g}{121.35\frac{g}{mole}}\)= 0.2884 molesC₃H₇OH: \(\frac{50 g}{60\frac{g}{mole}}\)= 0.8333 molesSo, the total moles of the solution can be calculated as:
Total moles = 1.3125 moles + 0.2884 moles + 0.8333 moles
Total moles = 2.4342 moles
Finally, the more fraction of each component can be calculated as follow:
CH₃OH: \(\frac{1.3125 moles}{2.4342 moles}\)= 0.54 CHCl₃: \(\frac{0.2884 moles}{2.4342 moles}\)= 0.118C₃H₇OH: \(\frac{0.8333 moles}{2.4342 moles}\)= 0.342In summary, the mole fraction of each component in the solution is:
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