The energy for the system to reach 20.5 °C is supplied by a chunk of hot metal. What would be the initial temperature of a 30.0 g piece of the metal? qmetal= -2113 J Cmetal = 0.575 J/g°C T₁ = [?] °C
Q: What is the molality of a solution composed of 3.25 g methanol (CH3OH) and 250 mL of water?
A:
Q: 15. You have 15 mL of a 0.25 M NaCl(aq) solution. What volume should you dilute it to in order to…
A: "To get remaining sub-parts solved please repost the complete question and mention the sub-parts to…
Q: A solution contains NaHCO3, Na2CO3, and NaOH, either alone or in permissible combination. Titration…
A:
Q: 1. Draw the main enolate that will be formed with the reaction conditions below? 25 °C CH3CH2OH +…
A: An asymmetric carbonyl compound with different alpha hydrogen form two different enolate Here we are…
Q: Calculate the vapor pressure of ethyl alcohol at 25 degrees Celsius if 72 g of glucose is dissolved…
A: Raoult's Law :- It states that, "The relative lowering vapor pressure of a dilute solution…
Q: A spoon is to be electroplated with gold using 1.0 M Au(NO 3) 3 and 2.50 A of current. How many…
A: Given, Amount of current = I = 2.50 A Mass of the Au = W = 5.00 g How many minutes are required…
Q: Using Table 6, calculate absolute errors in energy differences (in kJ mol-¹) for both methods in the…
A:
Q: Is possible to make a buffer pH 4 at 1mM using methanesulfonic acid and sodium tartrate? Please…
A: To explain: Is it possible to make a buffer pH 4 at 1mM using methanesulfonic acid and sodium…
Q: Draw the cis- and trans- geometric isomers (if they exist) of: a) BrCH=CHBr b) CH3CH2CH=CHCH2CH3 c)…
A:
Q: reaction + Ag (aq) + 2NH3(aq) – Ag(NH3)+ (aq) HBr(aq) + NH3(aq) → Br_(aq) + NH(aq) 2+ 2+ Zn(aq) + 6…
A: 1) Ag+(aq) + 2 NH3(aq) → Ag(NH3)2+(aq)
Q: Which of the following thermochemical equations represents the formation of liquid sulfuric acid?…
A:
Q: Consider the galvanic cell based on the following half-reactions: Mn²+ +2e →Mn = -1.18 V Fe²+ + 2e →…
A: Here we are required to find the standard potential of the cell reaction along with the equilibrium…
Q: 28. if 5 moles of NaCl is added to a 1 liter of pure water what will be the percent by mass of the…
A:
Q: A 50 mL solution of 0.08 M KCN (aq) is titrated with 0.125 M HCl (aq). Calculate the pH at the…
A:
Q: What is the calculated value of the cell potential at 298 K for an electrochemical cell with the…
A:
Q: Which compound has the element X with the oxidation number of +6. (select all that are correct)…
A: Oxidation number is basically hypothetical of an atom if all of it's bonds to different atoms were…
Q: Calculate the magnetic moment of Mn in K4[Mn(NCS) 6].
A: The complex given is K4[Mn(NCS)6].
Q: 5. Propose a structure for a compound, with molecular formula C8H19N, that fits the following…
A: Molecular formula C8H19 N Formula for degree of unsaturation of a molecule CnHx Ny = n+1-x2-y2 Now…
Q: Forty grams of powdered banana pulp was mixed with 80.00 mL of cold Tris-HCl extracting buffer to…
A: 1. The original concentration of standard solution is 2 mg/mL.
Q: Ancient Romans built often out of bricks and mortar. A key ingredient in their mortar was quicklime…
A: Question 1 . Decomposition of calcium carbonate. When calcium carbonate is heated solid calcium…
Q: At -6.00 °C the pressure equilibrium constant K = 4.2 x 10³ for a certain reaction. Here are some…
A: At - 6.00 °C , the pressure equilibrium constant, Kp = 4.2 × 105 for a certain reactionHeat…
Q: Using the table of the weak base below, you have chosen Ethylamine as your weak base in the buffer…
A: Given: pH of buffer solution = 10.1
Q: c. Describe the coupling pattern (i.e. doublet, triplet, doublet of doublets, etc.) for the peak at…
A: Solutions- Coupling pattern is the doublet, triplet, the 1H NMR spectrum was obtained on a 300 MHz…
Q: The redox reaction below has a AG value of 230. kJ. Determine the standard cell potential(Eᵒcell)…
A:
Q: Y Salt bridge A+ B- Y2+ - the half-cell containing Y is the , the half-cell containing X undergoes…
A: In the galvanic cell, anode is negative charged electrode and oxidation takes place. And cathode…
Q: 24. A deoxyhemoglobin molecule (molar mass 65,000 g) can bind up to four oxygen molecules. In a…
A:
Q: 1. NaOEt, EtOH H OBn 3. H₂O* quench OEt 2.0 com
A: The product of the given reaction is:
Q: Given two buffer solutions: Buffer 1 : 0.200 M CH3COOH - 0.200 M NaCH3COO Buffer 2 :…
A: The buffer solutions given are, Buffer 1 : 0.200 M CH3COOH - 0.200 M NaCH3COO Buffer 2 :…
Q: Consider the following reaction at 298K. 2Fe3+(aq) + 2I-(aq)------>2Fe2+(aq) + I2(s) The standard…
A:
Q: What is the oxidation state of the metal ion in the cation complex of the compound…
A: We are to discuss the oxidation state of metal ion in the given complex [Fe(H2O)6]2[Fe(CN)(H2O)5]3
Q: Which statement is correct for the cell with a notation Pt /Cl2(g)/Cl¯(aq) // Zn+2(aq)/Zn ?…
A: Answer: In the line notation of a cell, anode is always mentioned in the left and cathode is always…
Q: What would happen to CaBr2 + Ni(NO3)3 --> NiBr3 + Ca(NO3)2 , if another CaBr2 was added?
A:
Q: When the Cu²+ concentration is 4.32x10-4 M, the observed cell potential at 298K for an…
A: Answer: In the given cell reaction Mg is getting oxidized and Cu2+ is getting reduced, therefore Mg…
Q: 2. "No acid stronger than H³O+ exists in H₂O." Explain this statement. 3. Answer all parts: a. Al³+…
A:
Q: What will be the concentration of satndard AgNO3 if 4.55 mL is used to to turn the color of 12 mL of…
A:
Q: What is the volume of gas in liters at 1.00 atm if it originally occupies 2.00 L at 158 mmHg?
A: We will use the formula as :- P1V1 = P2V2
Q: Half-reaction E° (V) Cl₂(g) + 2e →→→ 2Cl¯(aq) 1.360V Cd²+(aq) + 2e → Cd(s)-0.403V Cr³+(aq) + 3e¯…
A:
Q: V. Mechanism. 1. Consider the following reaction. CH₂OH Ho Br OCH₂ 3. Draw out a complete electron…
A: 1 a. Methanol is polar protic solvent. The prefered mechanism is sn1. Here rearranged product is…
Q: Directions: Write the electron configuration for the following element. Element Electron…
A: Given table is : Element Electronic configuration 1. Aluminium 2. Calcium 3. Chlorine…
Q: Consider the following reactions 2- bromooc tame reacted with Sodium tert-butoxide Complete reaction…
A:
Q: The plot of InK vs. 1/T for a particular chemical reaction shown below yields a linear equation…
A:
Q: Pentane has a [Select] hexane has a [Select] Butane has a [Select] pentane has a [Select] pentane is…
A: Here we are required to compare the solubility and boiling point of various organic compound
Q: b. A few poles of C are too much for this all-around 85. As shown in the following reaction formula,…
A: Excess reagent is reagent present in large amount and limiting reagent is reagent that decide amount…
Q: (11) The quantized energies of the rigid rotor are If J=2, what are possible values of MJ given by…
A:
Q: Write/illustrate the detailed reaction mechanisms for the following transformations: 1.…
A:
Q: Your HRP sample had a concentration of 2.0 mg/mL and you added 10 uL to a tube containing 10 uL of…
A: Concentration of HRP sample = 2.0 mg/mL
Q: A group of students conducted a similar experiment to Part 3 (note the differences in concentration…
A:
Q: Directions: Write the electron configuration for the following element. Element Electron…
A:
Q: Ascorbic acid (H2C6H6O6; represented as H2Asc for this problem), known as vitamin C, is a diprotic…
A: Solutions- Given-Ascorbic acid (H2C6H6O6; represented as H2Asc, vitamin C, is a diprotic acid (Ka1 =…
Q: 140 130 120 110 100 90 80 70 60 50 40 30 20 10 Solubility (g/mL) Potassium nitrate Sodium chloride…
A: The solubility curve given is,
Step by step
Solved in 2 steps
- The enthalpy of vaporization for water is 40.65 kJ mol-1. As a design engineer for a project in a desert climate, you are exploring the option of using evaporative cooling. (a) If the air has an average volumetric heat capacity of 0.00130 J cm-3 K-1, what is the minimum mass of water that would need to evaporate in order to cool a 5 m? 5 m room with a 3 m ceiling by 5°F using this method? (b) Is this a spontaneous or nonspontaneous process?NH4NO3 + H2O -> NH4NO DeltaH = +25.7kJ What is the final temperature in an activated cold pack that contains 50.0g of NH4NO3 dissolved in 125mL of water? Assume a specific heat of 4.184J/g.C for the solution, an initial temperature of 25.0C and no heat transfer between the cold pack and the environment.In constant pressure calorimeter 75.0 ml is mixed with 1.25 M Hydrocloric acid solution is mixed with 75.0 ml of 1.25 M Sodium hydroxide solution. the density of the final solution is 1.00g/ml and the the solution both initially 21.45c, reach a maximum temperature of 28.32c when mixed. based on this information, and estimating the solution's heat capacity as 4.18Jg-1c-1, what is the amount of heat in Kilojoules, transferred in this reaction?
- An oxyacetylene torch is used to weld steel. During this process _________energy is converted into --mechanicalchemicalthermalelectrical energy. A. mechanical B.chemical C. thermal D.electrical When an ice cube (the system) melts, energy flows from the______ --(surroundings OR system )to the --__________(surroundings OR system )and the internal energy of the system --__________ (increases OR decreases OR does not change.) In a chemical hot pack, iron powder and oxygen react to form iron oxide in the presence of a catalyst. This reaction causes the temperature of the hot pack to increase. This process is --________(exothermic OR endothermic.) FILL IN THE BLANK ANSWER ALL PLEASEThe sun supplies about 1 kilowatt(s) of energy for each square meter of surface area (1 kW/m2kW/m2, where a watt = 1 J/sJ/s). Plants produce the equivalent of about 0.19 gg of sucrose (C12H22O11C12H22O11) per hour per square meter.A cylinder of compressed neon gas is opened to the atmosphere in a storage closed where P closet = 1010, 066 Pa, the gas then fills the closet. Volume of the gas Ne(g) cylinder = 0.7 m^3 and closrt is 1 m. Calculate the work usd in KJ
- A chemical reaction takes place inside a flask submerged in a water bath. The water bath contains 4.70 kg of water at 37.5C. During the reaction 92.8kJ of heat flows out of the flask and into the bath. Calculate the new temperature of the water bath. Heat capacity of water is 4.18J.g-1.K-1. Round your answer to 3A mixture of gaseous reactants is put into a cylinder, where a chemical reaction turns then into gaseaous products. the cylinder has a piston that moves in or out, as necessary, to keep a constant pressure on the mixture of 1 atm. the cylinder is also submerged in a large insulated water bath. From previous experiments, this chemical reaction is known to release 173.kJ of energy. the temperature of the water bath is monitored, and it is determined from this data that 37.2kJ of heat flows out of the system during the reaction. Is the reaction exothermic or endothermic? Does the temperature of the water bath go up or down? Does the piston move in or out? Does the gas mixture do work, or is work done on it? How much work is done on (or by) the gas mixture? Round your answer to 3 significant digits.You are camping and need to cook all your food using your camp stove which runs off of propane.If you wanted to warm up your giant mug (67.628 fluid ounces) of morning coffee from 10°C to 80°C,what mass of propane would you have to use?The ΔHcomb for propane is -2219.2 kJ/mol, the density of coffee is 1.0002 g/mL, and the specific heatcapacity of coffee is equal to that of water.1 fluid ounce = 0.0295735 L
- One kilogram of boiling water is poured into an empty thermos whose mass is 1kg and whose temperature is 25oC. No heat is lost from the thermos. The specific heats of water and the thermos are 1 and 0.5 kcal/kg-oC, respectively. Their final temperature is?How logn would it take to convert 100 g Na(s) at 20oC to sodium vapor at 1000oC if heating rate at a pressure of 1 atm is 8 kj/min? Tmelt = 97.8oC Tboil - 883oC CNa(s) = 28.2 J/mol K CNa (l) = 30.8 J/mol K C Na(g) = 20.2 J/mol K Solve by adding all the qs and showing work please, need step by step, and solve on paper!Using the data below, calculate ∆Hrxn for: HCl(aq) + NH3(aq) ® NH4Cl(aq) The reaction of 50.0 mL of 1.00 M HCl with 50.0 mL of 1.00 M NH3 causes a temperature rise of 6.4 ̊C in the resulting 100.0 mL of solution. The NH4Cl solution has density 1.005 g/mL and specific heat capacity 3.97 J/g ̊C. Pay careful attention to sig figs in this problem.