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Chemistry 102 Q&A Archive of January 10, 2025

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January 10 of 2025

how to asign charges on atom or cmpound
what's the value of the freezing point constant for water if the enthalpy of fusion at 273.15k is 6.00kjmol-1
Chrome File Edit View History Bookmarks Profiles Tab Window Help Fri Jan 10 3:19PM YuJa ALEKS - Escarly Vazquez - Le ALEKS ALEKS - Escarly…
20g of a solute was added to 100g of water at 25C, The vapor pressure of pure water was 23.76mmHg while that of the solution was 22.41mmHg. calculate the molar mass of the solute.
ALEKS ALEKS - Escarly Vazquez - Lc ALEKS ALEKS - Escarly Vazq ChatGPT sulfur hexafluoride - Google www-awu.aleks.com/alekscgi/x/lsl.exe/1o_u-IgNsikr7j8P3jH-IJjnzw4vpUz2|YCcR4NM7yr_IpMriNwxObE8IvdK6Wv5jrE6cEOQV63hcLwNSAOTTdQJgM9yJmgk5W4X-KNyn... States of Matter \( 3 / 5 \) Escarly Calculating…
ALEKS ALEKS - Escarly Vazquez - Lc N. ALEKS ALEKS - Escarly Vazq ChatGPT sulfur hexafluoride - Google www-awu.aleks.com/alekscgi/x/lsl.exe/10_u-lgNsikr7j8P3jH-IJjnzw4vpUz2IYCcR4NM7yr_IpMriNwxObE8IvdK6Wv5jrE6cEOQV63hcLwNSAOTTdQJgM9yJmgk5W4X-KNyn... States of Matter Escarly Calculating partial…
ALEKS ALEKS - Escarly Vazquez - L N. Try Ace Al STEM Tutor by Nur CIF5 molar mass - Google Se ChatGPT www-awu.aleks.com/alekscgi/x/lsl.exe/1o_u-lgNsikr7j8P3jH-IJjnzw4vpUz2IYCcR4NM7yr_IpMriNwxObE8IvdK6Wv5jrE6cEOQV63hcLwNSAOTTdQJgM9yJmgk5W4X-KNyn... States of Matter \( 0 / 5…
The movie below shows some molecules in a tiny sample of a mixture of gases. Drag the slider to see how the molecules move. \begin{tabular}{|l|l|} \hline \begin{tabular}{l} Does a chemical reaction happen during this \\ movie? \end{tabular} & \begin{tabular}{l} O yes \\ O no \end{tabular}…
ALEKS ALEKS - Escarly Vazquez - Ll atm to kpa - Gcogle Search: www-awu.aleks.com/alekscgi/x/lsi.exe/1o_u-lgNsikr7j8P3jH-IJjnzw4vpUz2iYCcR4NM7yr_JpMriNwxObE8lvdK6Wv5jrE6cEOQV63hctwNSAOTTdQJgM9yJmgk5W4X-KNyn... States of Matter Calculating partial pressure of a gas from a sketch Escarly Some \(…
BOG 23323 3 Obaze ukpos, GLONT PLACE 253230221 CLASS WORK (Minimum liquid rate for absorption) A packed tower is to be designed for the absorption of 98% of the ammonia(A) from an air-ammonia mixture containing 4% ammonia at a rate of 4200 Nm³ (normal cubic metre) per hour…
How many protons, neutrons, and electrons are in a neutral atom of 56Fe? Group of answer choices 56 protons, 26 neutrons, 26 electrons 56 protons, 26 neutrons, 56 electrons 26 protons, 30 neutrons, 30 electrons 26 protons, 30 neutrons, 56 electrons 26 protons, 30 neutrons, 26 electrons
Use VSEPR theory to predict the electron-pair geometry and the molecular geometry of XeF4. Group of answer choices The electron-pair geometry is octahedral, the molecular geometry is tetrahedral. The electron-pair geometry is tetrahedral, the molecular geometry is octahedral. The…
Magnesium reacts with iodine gas at high temperatures to form magnesium iodide. What mass of MgI2 can be produced from the reaction of 5.15 g Mg and 50.0 g I2? Group of answer choices 44.9 g 58.9 g 29.5 g 55.2 g 54.8 g
An unknown diprotic acid (H2A) requires 44.391 mL of 0.111 M NaOH to completely neutralize a 0.58 g sample. Calculate the approximate molar mass of the acid. Group of answer choices 235.42 g/mol 405.9 g/mol 58.86 g/mol 117.7 g/mol 202.95 g/mol
If a cordless phone operates at a frequency of 9.00× 1 0 8 s –1. What is the wavelength of this radiation? h= 6.6x10–34 m 2 kg/s c= 3 x1 0 8m/s Group of answer choices 3.33 × 10 –9 m 2.70 × 10 17 m 0.333 m 3.71 × 10 –18 m 1.99 × 10 –25 m
Which of the following statements concerning electrolytes and nonelectrolytes is/are true? 1. Some molecular substances are electrolytes. 2. All electrolytes are ionic substances. 3. Strong electrolytes partially ionize in solution. Group of answer choices 3 only 2 and 3 2 only 1 and…
An atom of which of the following elements has the smallest atomic radius? Group of answer choices Cl Si K P Ca
What is the maximum number of electrons that can occupy one ​p orbital? Group of answer choices 10 2 1 6 14
What is the correct formula for calcium nitrate? Group of answer choices Ca3N2 Ca3(NO3)2 CaNO2 CaN Ca(NO3)2
Calculate the number of moles in 0.48 g of copper. Group of answer choices 1.3 × 102 mol 31 mol 0.48 mol 0.033 mol 7.6 × 10−3 mol
What is the molarity of an NaI solution that contains 5.3 g of NaI in 41 mL of solution? Group of answer choices 0.035 M 0.0077 M 0.86 M 0.00027 M 0.13 M
What is the ground-state electron configuration of nitrogen (N)? Group of answer choices [He]2s32p2 [Ne]2p5 [Ne]2p5 [Ne]2s22p3 [He]2s22p3
What length of a cylindrical piece of tungsten wire having a radius of 3.79 mm has a mass of 39.7 g? The density of tungsten is 19.25 g/cm3 and Volume = πr2h. Group of answer choices 4.57 × 10–2 m 4.57 × 10–4 m 3.45 × 102 m 2.19 × 10–1 m 2.19 × 10–3 m
For reaction 3A + 2B → A3B2 ΔrH°= 83.6 kJ/(mol rxn) "A" molar mass = 22 g/mol; "B" molar mass= 105.7 g/mol what is the enthalpy change in kJ if 50 g of A react with 50 g of B?
The thermochemical equation for the combustion of methanol is given below. CH3OH(liquid) + 3/2 O2(g) → CO2(g) + 2 H 2O(g) ΔrH° = –638.7 kJ/mol-rxn What is the enthalpy change for the combustion of 8.59 g of CH3OH?
Calculate the energy in the form of heat (in kJ) required to change 78.2 g of liquid water at 26.3 °C to ice at –18.7 °C. Assume that no energy in the form of heat is transferred to the environment. (Heat of fusion = 333 J/g; heat of vaporization = 2256 J/g; specific heat capacities: ice = 2.06…
According to the reaction given below, the standard enthalpy change for the combustion of 1 mole of propane is –2043.0 kJ. C3H8(g) + 5 O2(g) → 3 CO2(g) + 4 H2O(g) Calculate ΔfH° for propane based on the given standard molar enthalpies of formation. molecule ΔfH° (kJ/mol-rxn) …
When 2.64 mL of 0.410 M of HI(aq) is combined with 5.22 mL of 0.570 M of NaOH(aq) in a coffee-cup calorimeter, the temperature of the solution increases by 3.15 °C. What is the change in enthalpy for this balanced reaction (kJ/mol rxn)? HI(aq) + NaOH(aq) → NaI(aq) + H2O(l) Assume that the…
For reaction 3A + 2B → A3B2 ΔrH°= 80.5 kJ/(mol rxn) "A" molar mass = 29 g/mol; "B" molar mass= 100 g/mol what is the enthalpy change in kJ if 50 g of A react with 50 g of B?
The thermochemical equation for the combustion of methanol is given below. CH3OH(liquid) + 3/2 O2(g) → CO2(g) + 2 H 2O(g) ΔrH° = –638.7 kJ/mol-rxn What is the enthalpy change for the combustion of 8.59 g of CH3OH? Group of answer choices –1.76 × 106 kJ –171 kJ –2.38 × 103 kJ –19.9 kJ …
Calculate the energy in the form of heat (in kJ) required to change 78.2 g of liquid water at 26.3 °C to ice at –18.7 °C. Assume that no energy in the form of heat is transferred to the environment. (Heat of fusion = 333 J/g; heat of vaporization = 2256 J/g; specific heat capacities: ice = 2.06…
According to the reaction given below, the standard enthalpy change for the combustion of 1 mole of propane is –2043.0 kJ. C3H8(g) + 5 O2(g) → 3 CO2(g) + 4 H2O(g) Calculate ΔfH° for propane based on the given standard molar enthalpies of formation. molecule ΔfH° (kJ/mol-rxn) …
When 1.87 mL of 0.410 M of HI(aq) is combined with 6.67 mL of 0.570 M of NaOH(aq) in a coffee-cup calorimeter, the temperature of the solution increases by 4.18 °C. What is the change in enthalpy for this balanced reaction (kJ/mol rxn)? HI(aq) + NaOH(aq) → NaI(aq) + H2O(l) Assume that the…
Identify if the processes are endothermic or exothermic: - combustion of butane \( \square \) [ Select ] , and the sign of \( \mathrm{q}_{\text {sys }} \) is [ Select ] - melting of ice [ Select] - raising water temperature from 300 K to 340 K [ Select ] - condensing water vapor to form…
Calculate the energy in the form of heat (in kJ) required to convert 325 grams of liquid water at 20.0 °C to steam at 115 °C. Assume that no energy in the form of heat is transferred to the environment. (Heat of fusion = 333 J/g; heat of vaporization = 2256 J/g; specific heat capacities: liquid…
Which of the following processes is/are endothermic? 1. the combustion of hydrogen 2. the condensation of water 3. the evaporation of isopropyl alcohol Group of answer choices 1, 2, and 3 1 only 1 and 3 3 only 2 only
How much energy is gained by copper when 48.7 g of copper is warmed from 10.2 °C to 67.0 °C? The specific heat capacity of copper is 0.385 J/(g·°C). Group of answer choices 1.91 × 102 J 1.26 × 103 J 21.86 J 25.79 J 1.06 × 103 J
Which one of the following statements is INCORRECT? Group of answer choices Exothermic processes transfer heat from the system into the surroundings. Energy is the capacity to do work. Energy is neither created nor destroyed in chemical reactions. Kinetic energy is the energy that results…
Exactly 251 J will raise the temperature of 10.0 g of a metal from \( 11^{\circ} \mathrm{C} \) to \( 89^{\circ} \mathrm{C} \). What is the specific heat capacity of the metal? answer units: \( \mathrm{J} /(\mathrm{g} \cdot \mathrm{K}) \)
2. Perform a retrosynthetic analysis and suggest a synthesis of the target molecule (on the left) from the given starting material (on the right). (any reagents maybe used) ( 30 marks each worth equal marks) From From From
\( \begin{array}{l}a^{3}(1+\cos \theta)^{3} \sin \theta d \theta \\ \pi a^{3} \frac{k^{t}}{4}=-\frac{2}{3} \pi a^{3}\left[\left.\frac{(1+\cos )^{4}}{4}\right|_{0} ^{x}=\frac{\operatorname{saa^{2}}}{3}\right.\end{array} \)
What are the molecular and empirical chemical formulas of a compound made up of these molecules? The lines stand for chemical bonds between the atoms. You can ignore the dots -- they represent "lone pairs" and you'll learn about them later. \begin{tabular}{|c|c|} \hline molecular formula: & \(…
Read each description in the first column of the table below. If any chemical element with atomic number of 92 or less matches the description, check Yes and enter the chemical symbol of an element that matches. Otherwise check No in the second column. \begin{tabular}{|c|c|c|} \hline…
Read each description in the first column of the table below. If any chemical element with atomic number of 92 or less matches the description, check Yes and enter the chemical symbol of an element that matches. Otherwise check No in the second column. \begin{tabular}{|c|c|c|} \hline…
Organization of the Periodic Iable Read each description in the first column of the table below. If any chemical element with atomic number of 92 or less matches the description, check Yes and enter the chemical symbol of an element that matches. Otherwise check No in the second…
Read each description in the first column of the table below. If any chemical element with atomic number of 92 or less matches the description, check \( Y \) es and enter the chemical symbol of an element that matches. Otherwise check No in the second column. \begin{tabular}{|c|c|c|c|} \hline…
\begin{tabular}{|c|c|c|} \hline substance & chemical symbol, chemical formula or Lewis structure & boiling point \\ \hline A & \( \mathrm{F}_{2} \) & (Choose one) \( { }^{\vee} \) \\ \hline B & & (Choose one) \( \checkmark \) \\ \hline C & & (Choose one) \( \checkmark \) \\ \hline D & & (Choose…
\begin{tabular}{|c|c|c|} \hline substance & chemical symbol, chemical formula or Lewis structure & boiling point \\ \hline A & \( \mathrm{Al}_{2} \mathrm{O}_{3} \) & (Choose one) \( { }^{\text {v }} \) \\ \hline B & CO & (Choose one) \( { }^{\text {V }} \) \\ \hline C & & (Choose one) \( {…
\begin{tabular}{|c|c|c|} \hline substance & chemical symbol, chemical formula or Lewis structure & boiling point \\ \hline A & \( \mathrm{H}_{2} \) & (Choose one) \( { }^{\text {V }} \) \\ \hline B & \( \mathrm{HgCl}_{2} \) & (Choose one) \( { }^{2} \) \\ \hline C & HCl & (Choose one) \( {…
\begin{tabular}{|c|c|c|} \hline substance & chemical symbol, chemical formula or Lewis structure & boiling point \\ \hline A & & (Choose one) \( { }^{\text {v }} \) \\ \hline B & \( \mathrm{H}_{2} \) & (Choose one) \( { }^{\text {v }} \) \\ \hline C & Co & (Choose one) \( { }^{\text {v }} \)…
(iv) Briefly explain "Carnot's Cycle. (b) When 1.00 mol glucose \( \left(\mathrm{C}_{6} \mathrm{H}_{12} \mathrm{O}_{6}\right) \) is oxidized to carbon dioxide and water at \( 25^{\circ} \mathrm{C} \) according to the equation: \[ \mathrm{C}_{6} \mathrm{H}_{12} \mathrm{O}_{6}(\mathrm{~s})+6…
Activity 1.1 Formulation of a minimal culture medium
THE NEGRO MOTORIST , GREEN BOOK ( Read The Negro Motorist Green Book. Alter you read, complete the Think Questlons below. WRITE THINK QUESTIONS 1. According to the introduction to the 1937 Edition. what is the purpose of The Negro Motorist Green Book? What kind of information can the reader…
ALEKS ALEKS - Escarly Vazquez - L N. ALEKS ALEKS - Escarly Vazq gaseous water - Google Sear www-awu.aleks.com/alekscgi/x/lsl.exe/1o_u-lgNsIkr7j8P3jH-IJjnzw4vpUz2IYCcR4NM7yr_IpMriNwxObE8Bm-dlzK4F2zRDRiT3dyzv4YtZ0B1OkqCErzo... Relaunch to update : States of Matter \( 3 / 5 \) Escarly Solving for…
ALEKS ALEKS - Escarly Vazquez - L N. ALEKS ALEKS - Escarly Vazq gaseous water - Google Sear www-awu.aleks.com/alekscgi/x/lsl.exe/1o_u-lgNsIkr7j8P3jH-IJjnzw4vpUz2IYCcR4NM7yr_IpMriNwxObE8Bm-dlzK4F2zRDRiT3dyzv4YtZ0B1OkqCErzo... Relaunch to update : States of Matter Solving for a gaseous…
ALEKS ALEKS - Escarly Vazquez N. ALEKS ALEKS - Escarly carbon monoxide - Goog dinitrogen difluoride -Gc calcium oxide - Google s www-awu.aleks.com/alekscgi/x/lsl.exe/1o_u-lgNsikr7j8P3jH-IJjnzw4vpUz2IYCcR4NM7yr_IpMriNwxObE8Bm-dizK4F2zRDRiT3dyzv4YtZ0B1OkqCErzo... Relaunch to update : States of…
ALEKS ALEKS - Escarly Vazquez - Le N. ALEKS ALEKS - Escarly Vaza carbon monoxide - Google St dinitrogen difluoride - Google www-awu.aleks.com/alekscgi/x/lsl.exe/1o_u-IgNslkr7j8P3jH-IJjnzw4vpUz2|YCcR4NM7yr_IpMriNwxObE8Bm-dizK4F2zRDRiT3dyzv4YtZ0B1OkqCErzo... Relaunch to update : States of…
ALEKS ALEKS - Escarly Vazquez - Lc N. ALEKS ALEKS - Escarly Vazq carbon monoxide - Google St www-awu.aleks.com/alekscgi/x/lsl.exe/1o_u-lgNsIkr7j8P3jH-IJjnzw4vpUz2IYCcR4NM7yr_IpMriNwxObE8Bm-dlzK4F2zRDRiT3dyzv4YtZ0B1OkqCErzo... Relaunch to update : States of Matter Using the ideal equation of…
ALEKS ALEKS - Escarly Vazquez - Le N. ALEKS ALEKS - Escarly Vazq dinitrogen monoxide \( = \) Googlc www-awu.aleks.com/alekscgi/x/lsl.exe/1o_u-lgNsIkr7j8P3jH-IJjnzw4vpUz2IYCcR4NM7yr_IpMriNwxObE8Bm-dlzK4F2zRDRiT3dyzv4YtZ0B1OkqCErzo... Relaunch to update : States of Matter \( 0 / 5…
what's the value of the freezing point constant for water if the enthalpy of fusion at 273.15k is 6.00kjmol-1
20g of a solute was added to 100g of water at 25C, The vapor pressure of pure water was 23.76mmHg while that of the solution was 22.41mmHg. calculate the molar mass of the solute.