Average rainfall is 20.0 inch and temperature ranges from 2.5° to 80.8° in the Jackson, Wyoming.
Rainfall: The average rainfall occurs in Jackson, Wyoming is 20.0 inch, the average amount of snowfall in Jackson, Wyoming is 109.0 inch.
Precipitation occurs about 113.3 days in a year whereas 215 days are sunny at the Jackson, Wyoming.
Temperature: The maximum temperature is 80.8° that occurs in the month of June, July, August and September whereas the minimum temperature is 2.5° that occurs in the month of December and January.
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A major component of gasoline is octane (C8H8). When liquid octane is burned in air it reacts with oxygen (O2) gas to produce "0.050 mol" carbon dioxide gas and water vapor. Calculate the moles of octane needed to produce of carbon dioxide.
Answer:
0.0063 mol
Explanation:
Step 1: Write the balanced combustion equation
C₈H₁₈(l) + 12.5 O₂(g) ⇒ 8 CO₂(g) + 9 H₂O(g)
Step 2: Establish the appropriate molar ratio
According to the balanced equation, the molar ratio of C₈H₁₈ to CO₂ is 1:8.
Step 3: Calculate the number of moles of C₈H₁₈ needed to produce 0.050 moles of CO₂
0.050 mol CO₂ × 1 mol C₈H₁₈/8 mol CO₂ = 0.0063 mol C₈H₁₈
Kati was in the kitchen when she heard a crash. She went into her bedroom and found her window broken and a baseball lying on the ground. Kati said "this baseball broke my window." This statement is an
Answer: inference because she drew a conclusion based on evidence.
why?:
Because the evidence was that she heard the crashing sound, and then when she came into her room saw the broken window and baseball.
It was not an observation because she did not directly see the baseball going through the window
Jane performed the following trials in an experiment.
Trial 1: Heat 80.0 grams of water at 15.0 °C to a final temperature of 65.0 °C.
Trial 2: Heat 80.0 grams of water at 10.0 °C to a final temperature of 65.0 °C.
Which statement is true about the experiments?
The same amount of heat is absorbed in both the experiments because the mass is same.
The same amount of heat is absorbed in both the experiments because the final temperature is same.
The heat absorbed in Trial 2 is about 1,240 J greater than the heat absorbed in Trial 1.
The heat absorbed in Trial 2 is about 1,674 J greater than the heat absorbed in Trial 1.
Answer:
The heat absorbed in Trial 2 is about 1,240 J greater than the heat absorbed in Trial 1.
The heat absorbed in Trial 2 is about 1,674 J greater than the heat absorbed in Trial 1.
The amount of heat absorbed or released by a substance can be calculated using the formula Q = mcΔT, where Q represents heat, m is the mass, c is the specific heat capacity, and ΔT is the change in temperature.
In this case, the mass (m) is the same in both trials, but the initial and final temperatures (ΔT) differ. By comparing the values of ΔT in both trials, we can determine the difference in the amount of heat absorbed.
In Trial 1, the initial temperature is 15.0 °C and the final temperature is 65.0 °C, resulting in a ΔT of 65.0 - 15.0 = 50.0 °C.
In Trial 2, the initial temperature is 10.0 °C and the final temperature is 65.0 °C, resulting in a ΔT of 65.0 - 10.0 = 55.0 °C.
Since the specific heat capacity of water is approximately 4.18 J/g°C, we can calculate the difference in heat absorbed:
ΔQ = mcΔT = (80.0 g)(4.18 J/g°C)(55.0 °C - 50.0 °C) = 1,674 J
Therefore, the heat absorbed in Trial 2 is approximately 1,674 J greater than the heat absorbed in Trial 1.
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What is the molality of a glucose solution prepared by dissolving 16.7 g of glucose, C6H12O6, in 133.6 g of water
Answer:
0.696 m
Explanation:
We'll begin by calculating the number of mole in 16.7 g of C₆H₁₂O₆. This can be obtained as follow:
Mass of C₆H₁₂O₆ = 16.7 g
Molar mass of C₆H₁₂O₆ = (6×12) + (12×1) + (6×16)
= 72 + 12 + 96
= 180 g/mol
Mole of C₆H₁₂O₆ =?
Mole = mass / molar mass
Mole of C₆H₁₂O₆ = 16.7 / 180
Mole of C₆H₁₂O₆ = 0.093 mole
Next, we shall convert 133.6 g of water to Kg. This can be obtained as follow:
1000 g = 1 Kg
Therefore,
133.6 g = 133.6 g × 1 Kg / 1000 g
133.6 g = 0.1336 Kg
Thus, 133.6 g is equivalent to 0.1336 Kg.
Finally, we shall determine the molality of the solution. This can be obtained as illustrated below:
Mole of C₆H₁₂O₆ = 0.093 mole
Mass of water = 0.1336 Kg
Molality =?
Molality = mole / mass of water (in Kg)
Molality = 0.093 / 0.1336
Molality = 0.696 m
Therefore, the molality of the solution is 0.696 m
A calorimeter measures the Choose... involved in reactions or other processes by measuring the Choose... of the materials Choose... the process. The calorimeter is Choose... to prevent transfer of heat to outside the device.
Answer:
heat; temperature; surrounding; insulated.
Explanation:
A calorimeter can be defined as a scientific instrument (device) that is designed and developed for measurement of the heat involved in chemical reactions or other processes, especially by taking the measurement of the temperature of the materials surrounding the process.
Basically, a calorimeter is insulated using materials with a very high level of resistivity, so as to prevent heat transfer to the outside of the device (calorimeter).
Some of the components that make up a simple calorimeter are; thermometer, an interior styrofoam cup, an exterior styrofoam cup, cover, etc.
Additionally, a calorie refers to the amount of heat required to raise the temperature of a gram of water by one degree Celsius (°C)
A calorimeter measures the heat involved in reactions or other processes by measuring the temperature of the materials surrounding the process. The calorimeter is insulated to prevent transfer of heat to outside the device.
What is calorimeter?Calorimeter is an instrument used in chemical reactions for measuring the heat, physical changes as well as heat capacity of the chemical reaction.
From the definition of calorimeter it is clear that it checks the temperature of the reaction and calculates the heat of the chemical reaction. It is insulated by those materials which are bad conductors of heat so that no heat will loss from this apparatus.
Hence, correct options are heat, temperature, surroundings and insulated.
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Balance the following skeleton reaction and identify the oxidizing and reducing agents:
CrO42- (aq) + N2O(g)+ H+(aq) + OH-(aq) + H2O(l) ⟶ Cr3+(aq) + NO(g) + H+(aq) + OH-(aq) + H2O(l)
oxidizing agent is (enter just the formula of the species, e.g. CrO42-,N2O, Cr3+,NO, H2O, H+, OH-)
reducing agent is (enter just the formula of the species, e.g. CrO42-,N2O, Cr3+,NO, H2O, H+, OH-)
Answer:
The balanced net ionic equation is as follows:
CrO₄²- (aq) + 3 N₂O (g) + 2 H+ (aq) ----> Cr³+ (aq) + 6 NO (g) + H₂O (l)
The oxidizing agent is CrO₄²- as Cr⁶+ in CrO₄²- is reduced to Cr³+.
The reducing agent is N₂O as the nitrogen (i) is oxidized to nitrogen (ii).
Explanation:
The skeleton equation is given as follows:
CrO₄²- (aq) + N₂O(g)+ H+(aq) + OH-(aq) + H2O(l) ----> Cr³+(aq) + NO(g) + H+(aq) + OH-(aq) + H₂O(l)
The balanced net ionic equation with the spectator ions removed is as follows:
CrO₄²- (aq) + 3 N₂O (g) + 2 H+ (aq) ----> Cr³+ (aq) + 6 NO (g) + H₂O (l)
In a redox reaction, oxidizing agents are reduced while reducing agents are oxidized.
The oxidizing agent is CrO₄²- as Cr⁶+ in CrO₄²- is reduced to Cr³+.
One mole of CrO₄²- accepts three moles of electrons from three moles of N₂O to become reduced to 1 mole of Cr³+.
The reducing agent is N₂O as the nitrogen (i) is oxidized to nitrogen (ii).
Three moles of N₂O will each donate one mole of electrons to one mole of CrO₄²- to become oxidized to nitrogen (ii) oxide.
Hydrogen ions and a water molecule is added to the left-hand side and right-hand side of the equation respectively, in order to balance the number of oxygen atoms in the equation of the reaction.
Rank the following series of molecules or ions in order of decreasing bond energy using their bond order to predict relative magnitude: chlorine: Cl2, sulfur: S2, phosphorus: P2.
Answer:
P2>S2>Cl2 is the order of bond energy of the given molecules.
Explanation:
The bonding in each molecule is shown below:
Thus, between each P-atom, there exists a triple bond.
Between two S-atoms there exists a double bond.
Between two chlorine atoms, there exists a single bond.
As the number of bonds increases between the given atoms, then bond energy required to break the bonds also increases.
Thus, the bond order is shown below:
[tex]P_2>S_2>Cl_2[/tex].
Which of the following would tell you that a weak base is present?
A. If the pH of the solution is close to 14.
B. If the solution is a good conductor of electricity.
C. An indicator added to the solution turns green-blue.
D. If there is a high reaction rate.
Answer:
An indicator added to the solution turns green-blue.
Explanation:
An indicator is a substance which shows the degree of acidity or alkalinity of a solution by change in colour of the solution.
The universal indicator changes colour as the pH of the solution changes. Looking at the colour ranges for the universal indicator, the green-blue colour indicates a weak base.
Melanie has completed the analysis of her data for the reaction of KMnO4 with malonic acid and data for a reaction of KMnO4 with tartaric acid. She compared the activation energies, Ea, she calculated for the two reactions and found the Ea for the malonic acid reaction to be greater than the Ea for the tartaric acid reaction.
Required:
What does this mean about the magnitude of the rate constant, k, and the rate of the reaction?
Answer:
See explanation
Explanation:
The relationship between the activation energy and rate of reaction is best captured by the Arrhenius equation;
k= Ae^-Ea/RT
Where;
k= rate constant
A= pre-exponential factor
Ea=activation energy
R= gas constant
T= temperature
We can see from the foregoing that, as the activation energy increases, the rate of reaction decreases and vice versa. reactions that have a very high activation energy are markedly slow.
Since the activation energy for the malonic acid reaction is found to be greater than the activation energy for the tartaric acid reaction, then the rate of the malonic acid reaction(k) will be slower than that of the tartaric acid reaction.
The study of chemistry and bonds is called chemistry. There are two types of elements metal and nonmetals.
The correct answer is mentioned below.
What is the Arrhenius equation?The relationship between the activation energy and rate of reaction is best captured by the Arrhenius equationThe equation is as follows:-
[tex]k= Ae^{-Ea/RT[/tex] Where;
k= rate constantA= pre-exponential factorEa=activation energyR= gas constantT= temperatureWe can see from the foregoing that, as the activation energy increases, the rate of reaction decreases and vice versa. reactions that have very high activation energy are markedly slow. Since the activation energy for the malonic acid reaction is found to be greater than the activation energy for the tartaric acid reaction, then the rate of the malonic acid reaction(k) will be slower than that of the tartaric acid reaction.
Hence, the correct answer is mentioned above.
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0.45 mole of krypton gas occupies a volume of 1.6 L. What volume will 1.8 moles of krypton occupy assuming the temperature and pressure remain the same
Answer:
6.4 L
Explanation:
As the temperature and pressure are assumed to remain the same, we can solve this problem by using Avogadro's law, which states:
V₁n₂ = V₂n₁Where in this case:
V₁ = 1.6 Ln₂ = 1.8 molV₂ = ?n₁ = 0.45 molWe input the data given by the problem:
1.6 L * 1.8 mol = V₂ * 0.45 molAnd solve for V₂:
V₂ = 6.4 LWhat is the relationship (formula) and proportionality
between frequency, and wavelength?
Answer:
Frequency and wavelength are inversely proportional. c=f⋅λ (The speed of light is directly proportional to f and λ)
Proteins are:
amino acids.
carbohydrates.
minerals.
sugars.
Please help
Explain why a molecule that has polar bonds can be a polar molecule.
Answer:
Explanation:
Well, obviously a molecule with polar bonds can be polar in itself. It's like saying I am an atheltic person who can just reach the basketball rim with my head and also I can dunk.
But if the question is how can a molecule that in non-polar have polar bonds, well, its because the polar bonds' dipole cancels each other out. It's like a tight rope. If a person pulls in one direction, it intuitively, the rope would go in that direction. However, if a person pulls in the other direction with the same amount of force, the rope stays still. This is the same case. Although molecules can have different electronegativities, the pull of electrons in one direction is cancelled out by a pull in the opposite direction, making the net dipole 0.
This is common for main VSERP shaped molecules like linear, trigonal planar, tetrahedral, trigonal bipyramidal, and octahedral.
Stalactites and stalagmites form as ________ precipitates out of the water evaporating in underground caves.
Stalactites and stalagmites form as ________ precipitates out of the water evaporating in underground caves.
Group of answer choices
hydrochloric acid
sodium bicarbonate
calcium carbonate
sodium chloride
sodium hydroxide
Answer:
calcium carbonate
Explanation:
A stalactite is an icicle-looking mould that is formed by the precipitation of natural minerals as a result of water dripping from the ceiling, hanging from a cave.
A stalagmites in the other hand, grows upwards and is also a mound that is formed by the deposits of minerals gotten by the water dripping on the floor of a cave.
Therefore, stalactites and stalagmites form as calcium carbonate precipitates out of the water evaporating in underground caves.
The Tollen's test is the reaction of aldehydes with silver(l) ions in basic solution to form silver metal and a carboxylate. 2 Ag+ + + 3 OH- - HR 2 Ag +_ W + 2 H2O ÃR Which species is being oxidized in the reaction? Choose... Which species is being reduced in the reaction? Choose... Which species is the visual indicator of a positive test? v Choose... Carboxylate ion Aldehyde Silver metal Water Silver(1) ion Hydroxide ion
Answer:
Explanation:
When Tollen's test is done by aldehyde , silver ion is converted into silver which forms a layer which looks like a mirror.
Ag⁺ + e = Ag
It is a reduction process where silver(1) ion is reduced to metallic silver.
Aldehyde is oxidized to carboxylate ion.
CH₃CHO + 2 OH⁻ = CH₃COO⁻ + H₂O + H⁺ + 2e
Visual indicator is silver metal which forms silver mirror at the bottom of test tube .
Complete the table by assigning variable or fixed to the shape and volume of solids, liquids, and gases.
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Shape Volume
solids
liquids
gases
Answer Bank
Fixed or variable
The properties of solids, liquids and gases regarding their shapes and volumes are:
Shape Volume
Solids Fixed Fixed
Liquids Variable Fixed
Gases Variable Variable
Solids have strong attraction forces between their molecules. Thus, the molecules are closely packed with little movement. As a consequence, both shape and volume are fixed.
In liquids, attraction and repulsion forces are similar. They have a little more movement than the solid state. Then, they do have a fixed volume but they adopt the shape of the container.
Gases have very weak attraction forces between their molecules. They move very freely and expand trying to occupy as much volume as possible. So, they have a variable volume and shape (adopt the shape of the container).
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Please help me order these bonds
Answer:
From least polar covalent to most polar covalent;
S-I< Br-Cl < N-H< Te-O
From most ionic to least ionic
Cs-F> Sr-Cl> Li- N> Al-O
Explanation:
Electro negativity is the ability of an atom in a bonding situation to attract the electron pair of a bond towards itself.
Electro negativity difference between two atoms determines the nature of bond existing between any two atoms. When this difference is large, an ionic bond exists in the compound. However, an intermediate difference in electro negativity implies the existence of a polar covalent bond.
Hence, going by electro negativity differences as mentioned in the question, the bonds in the answer were arranged in order of increasing polar covalent nature or decreasing ionic nature as shown.
Linda used 16.25 mL of 0.4776 M NaOH to neutralize a 10.00 mL sample of orange juice. Assuming all acid in the sample was citric acid, what is the concentration, in M, of citric acid in the orange juice
Answer:
Explanation:
Citric acid is a tribasic acid , having three ionizable hydrogen in them.
Let the molarity of citric acid be X .
Normality = 3 X
Using the formula S₁ V₁ = S₂ V₂
.4776 M x 16.25 mL = 10 mL x 3 X
X = .2587
Hence molarity of citric acid is 0.2587 M .
Kingsley then adds 49.28 mL of NaOH to 250.00 mL of the HCOOH solution. The neutralization reaction resulted in 0.098 moles of HCOOH and 0.025 moles of HCOO left in solution. Determine the pH of the resulting solution. Which of the following acids would produce the highest pH at the equivalence point in a weak acid-strong base titration?
Ka(HF) =6.8x10-4
Ka(HNO2) =4.5x10-4
Ka(HCIO2) =1.1x10-2
K(CH3COOH) =1.8x10-5
i. HCIO2
ii. CH3COOH
iii. HF
iv. HNO2
Answer:
i. HCIO2 - 2.9
ii. CH3COOH - 2.64
iii. HF - 3.27
iv. HNO2 - 2.67
Explanation:
The Ph value differ for base and acid. A neutral solution will have Ph value of 7. For acid the Ph value is less than 7 and for base Ph value is greater than 7. The highest Ph value for the given acids is 3.27 for hydroflouric acids.
The pH of the resulting solution is 3.16. Acetic acid having the formula [tex]CH_3COOH[/tex] would produce the highest pH at the equivalence point in a weak acid-strong base titration.
Kingsley adds 49.28 mL of NaOH to 250.00 mL of the HCOOH solution.
The neutralization reaction resulted in 0.098 moles of HCOOH and 0.025 moles of HCOO⁻ left in the solution.
We have to determine the pH of the resulting solution and identify the acid that would produce the highest pH at the equivalence point in a weak acid-strong base titration.
What is pH?pH, a quantitative measure of the acidity or basicity of aqueous or other liquid solutions.
Kingsley adds 49.28 mL of NaOH to 250.00 mL of the HCOOH solution.
Total volume of the solution = 49.28 mL + 250.0 mL = 299.28 mL = 0.29928 L
At neutralization point, HCOOH = 0.098 mol = [tex]\frac{0.098\ mol}{0.29928\ L} = 0.32745\ M[/tex]
So, Concentration of HCOOH at neutralization point = 0.32745 M
And [tex]HCOO^-[/tex] at neutralization point = 0.025 mol = [tex]\frac{0.025\ mol}{0.29928\ L} = 0.08353\ M[/tex]
So, Concentration of HCOO⁻ at neutralization point = 0.08353 M
Now, [tex]K_a[/tex] value of HCOOH = [tex]1.77\times10^{-4}[/tex] (reference value}
We know that [tex]pK_a = -logK_a[/tex]
[tex]pK_a = -log(1.77\times10^{-4}) = 3.75[/tex]
Now, HCOOH is acid and HCOO⁻ is the conjugate base.
According to Henderson Hasselblach equation:
[tex]pH = pK_a + log\frac{[conjugate\ base]}{[acid]}\\ \therefore pH = 3.75 + log\frac{[HCOO^-]}{[HCOOH]}\\pH = 3.75 + log(\frac{0.08353}{0.32745})\\pH = 3.75 +(-0.59)\\pH = 3.16[/tex]
Therefore, the pH of the resulting solution is 3.16.
When weak acid is titrated with a strong base, the pH at the neutralization point is always greater than 7. It is because the conjugate base produced by weak acid in neutralization reaction is comparatively stronger in nature which produces [tex]OH^-[/tex] at neutralization point after reacting with water. so the solution is basic. As a result, pH is more than 7.
Now, the weaker is the acid, the stronger is the conjugate base, and vice-versa. Therefore, the concentration of [tex]OH^-[/tex] ions is more at the neutralization point. So more will be the pH value.
Given acids with the corresponding [tex]K_a[/tex] value are shown below:
[tex]K_a(HF) =6.8\times10^{-4}\\K_a(HNO_2) =4.5\times10^{-4}\\K_a(HClO_2) =1.1\times10^{-2}\\K_a(CH_3COOH) =1.8\times10^{-5}[/tex]
We know that lower the value of [tex]K_a[/tex] of acid, the weaker is the acid and vice-versa. Hence, [tex]CH_3COOH[/tex] has lowest [tex]K_a[/tex] value compared to other acids. Therefore, [tex]CH_3COOH[/tex] would produce the highest pH at the equivalence point in a weak acid-strong base titration.
Hence, The pH of the resulting solution is 3.16. Acetic acid having the formula [tex]CH_3COOH[/tex] would produce the highest pH at the equivalence point in a weak acid-strong base titration.
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Acetylene gas is often used in welding torches because of the very high heat produced when it reacts with oxygen gas, producing carbon dioxide gas and water vapor. Calculate the moles of water produced by the reaction of of acetylene. Be sure your answer has a unit symbol, if necessary, and round it to significant digits.
Answer:
0.60 mol
Explanation:
The equation is as stated below;
2 C2H2 + 5 O2----> 4 CO2 +2 H2O
5 mole amount of Oxygen produces 2 mole of water. Then upon reaction of 1.5mol of O2.
thus, number of mole = (1.5*2)/5 =0.60mol
Determine whether each of the following statements is true or false. If false, correct the statement to make it true: (a) The nucleus has most of the mass and comprises most of the volume of an atom. (b) Every atom of a given element has the same number of protons. (c) The number of electrons in an atom equals the number of neutrons in the atom. (d) The protons in the nucleus of the helium atom are held together by a force called the strong nuclear force.
Answer:
Every atom of a given element has the same number of protons
The protons in the nucleus of the helium atom are held together by a force called the strong nuclear force.
Explanation:
Atoms are composed of electrons, protons and neutrons. The electron is negatively charged, protons are positively charged and the neutrons have no charge.
Electrons are found in shells while protons are found inside the atomic nucleus. Similar to electrostatic forces between electron and proton, protons of helium are held together by a strong nuclear blinding force.
Note that, all isotopes must have the same atomic number. This shows that they are all the same atom changed by differences in number of neutrons.
A dehydration reaction starting with 3.0 g cyclohexanol produces 1.9 g cyclohexene. Calculate the theoretical yield for this reaction. Report your answer with two significant figures.
Answer:
77%
Explanation:
First we convert 3.0 g of cyclohexanol (C₆H₁₂O) to moles, using its molar mass:
Molar mass of C₆H₁₂O = 100.158 g/mol3.0 g ÷ 100.158 g/mol = 0.030 molThen we convert 1.9 g of cyclohexene (C₆H₁₀) to moles, using its molar mass:
Molar mass of C₆H₁₀ = 82.143 g/mol1.9 g ÷ 82.143 g/mol = 0.023 molFinally we calculate the theoretical yield:
0.023 mol / 0.030 mol * 100% = 77%If 13.50 mL of an aluminum chloride solution is needed to reach the equivalence point with 10.00 mL of 0.109 M silver nitrate solution, determine the molarity of the aluminum chloride solution.
Answer:
If 13.50 mL of an aluminum chloride solution is needed to reach the equivalence point with 10.00 mL of 0.109 M silver nitrate solution, determine the molarity of the aluminum chloride solution.
Explanation:
The balanced chemical equation of the reaction is:
[tex]AlCl_3(aq)+3AgNO_3(aq)->3AgCl(s)+Al(NO_3)_3(aq)[/tex]
So, one mole of aluminum chloride reacts with three moles of silver nitrate.
At the equivalence point,
the number of moles of each reactant must be equal.
The number of moles = molarity x volume in L.
Number of moles of AlCl3 = volume x molarity
=0.0135Lx Molarity
The number of moles of AgNO3 = 3 x 0.010Lx 0.109M
Thus,
0.0135Lx Molarity = 3 x 0.010Lx 0.109M
Molarity of AlCl3 :
[tex]Molarity of Alcl_3=3 x 0.010Lx 0.109M/0.0135\\=0.242M[/tex]
Answer is : 0.242M.
How many moles of magnesium oxide are produced by the reaction of 1.82 g of magnesium nitride with of water
Complete Question
How many moles of magnesium oxide are produced by the reaction of 1.82 g of magnesium nitride with 17.73 g of water? Mg3N2 + 3H20 + 2NH3 + 3MgO
Answer:
[tex]Moles\ of\ MgO = 0.054 mol[/tex]
Explanation:
From the question we are told that:
Reaction Formula:
[tex]Mg_3N_2 + 3H_2_O => 2NH_3 + 3MgO[/tex]
[tex]Mass Mg_3N_2 =1.82g[/tex]
[tex]H_20=17.73g[/tex]
Therefore
[tex]Moles\ of\ Mg_3N_2 =\frac{1.82g}{100.25}[/tex]
[tex]Moles\ of\ Mg_3N_2 =0.0180 mol[/tex]
Generally
[tex]Moles\ of\ H_20 =\frac{17.73g}{18.015}[/tex]
[tex]Moles\ of\ H_20 = 0.9841[/tex]
Therefore
[tex]Moles\ of\ MgO =0.0180 mol * (3 mol of MgO)[/tex]
[tex]Moles\ of\ MgO = 0.054 mol[/tex]
Answer:
0.0182 mole of magnesium oxide, MgO
Explanation:
We'll begin by calculating the number of mole in 1.82 g of magnesium nitride, Mg₃N₂. This can be obtained as follow:
Mass of Mg₃N₂ = 1.82 g
Molar mass of Mg₃N₂ = (3×24) + (2×14)
= 72 + 28
= 100 g/mol
Mole of Mg₃N₂ =?
Mole = mass / molar mass
Mole of Mg₃N₂ = 1.82 / 100
Mole of Mg₃N₂ = 0.0182 mole
Finally, we shall determine the number of mole of magnesium oxide, MgO produced from the reaction. This can be obtained as follow:
Mg₃N₂ + 3H₂O –> 3MgO + 2NH₃
From the balanced equation above,
3 moles of Mg₃N₂ reacted to 3 moles of MgO.
Therefore, 0.0182 mole of Mg₃N₂ will also react to produce 0.0182 mole of MgO.
Thus, 0.0182 mole of magnesium oxide, MgO was obtained from the reaction.
Compound X has a molar mass of 266.64 g/mol and the following composition: aluminum 20.24% chlorine 79.76% Write the molecular formula of X
Answer:
Explanation:
Assume we have 100g of this substance. That means we would have 20.24g of Cl and 79.76g of Al. Now we can find how many moles of each we have:
[tex]\frac{79.76 \:g}{35.45 \: g/mol}[/tex] = 2.25 mol of chlorine
[tex]\frac{20.24 \: g}{26.98 \: g/mol}[/tex] = 0.750 mol of Al.
To form a integer ratio, do 2.25/0.75 = 2.99999 ~= 3.
So the ratio is essentially Al : Cl => 1 : 3. To the compound is possibly [tex]AlCl_3[/tex].
However, it says it has a molar mass of 266.64 g/mol, and since AlCl3 has a molar mass of 133.32, it must be [tex]Al_2Cl_6[/tex].
Actually this molecule isn't exactly AlCl3 (which is ionic). Al2Cl6 forms a banana bond where Cl acts as a hapto-2 ligand. But that's a bit advanced. All you need to know is X = Al2Cl6
The molecular formula of the compound is Al₂Cl₆
To solve the question given above, we'll begin by obtaining the empirical formula of the compound. This can be obtained as follow:
Aluminum (Al) = 20.24%
Chlorine (Cl) = 79.76%
Empirical formula =?Al = 20.24%
Cl = 79.76%
Divide by their molar mass
Al = 20.24 / 27 = 0.75
Cl = 79.76 / 35.5 = 2.25
Divide by the smallest
Al = 0.75 / 0.75 = 1
Cl = 2.25 / 0.75 = 3
Thus, the empirical formula of the compound is AlCl₃
Finally, we shall determine the the molecular formula of the compound.
Molar mass of compound = 266.64 g/mol
Empirical formula = AlCl₃
Molecular formula =? Molecular formula = [AlCl₃]ₙ = molar mass of compound[AlCl₃]ₙ = 266.64
[27 + (3×35.5)]n = 266.64
[27 + 106.5]n = 266.64
133.5n = 266.64
Divide both side by 133.5
n = 266.64 / 133.5
n = 2Molecular formula = [AlCl₃]ₙ
Molecular formula = [AlCl₃]₂
Molecular formula = Al₂Cl₆Therefore, the molecular formula of the compound is Al₂Cl₆
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How do I balance this equation? ?KClO3 → ?KCl + ?O2(g) and what type of reaction is it?
Explanation:
the reaction is a decomposition reaction since potassium hypochlorite is decomposed into potassium chloride and oxygen
Question 47
4 pts
Dimensional analysis & conversions. If you need scientific notation in you answer, copy this for the
exponential part: "x10^". An example would be 6.022x10^23 for Avogadro's number.
Your answers need to have the correct number of significant figures.
How many grams of hydrogen are in 10.45 moles of C&Hg? (The molar mass is not
needed for this problem.)
Answer:
84.27 g
Explanation:
How many grams of hydrogen are in 10.45 moles of C₃H₈?
Step 1: Calculate the moles of atoms of hydrogen
The molar ratio of C₃H₈ to H is 1:8.
10.45 mol C₃H₈ × 8 mol H/ 1mol C₃H₈ = 83.60 mol H
Step 2: Calculate the mass corresponding to 83.60 moles of hydrogen
The molar mass of hydrogen is 1.008 g/mol.
83.60 mol × 1.008 g/mol = 84.27 g
Anyone can help me out please?!
For consumption of each gram of reactant released=37.9 kJ/g
Therefore, for consumption of 4kg of reactant heat released=37.9x4 kJ/g
Gold’s natural state has a definite shape and a definite volume. What is gold’s natural state
If Gold's natural state has a definite shape and a definite volume, then its natural state is solid.
What type of energy does a skier stopped at the top of a hill have because of
his or her position?
A. Kinetic energy
B. Gravitational potential energy
C. Heat energy
D. Chemical energy
Answer:
B
Explanation: