Initial Temp of HCl: 22.96 C Final Temp of HCl: 28.30 C Moles of HCl: .05 moles Moles of NaOH: .05 moles Cs water: 4.184 J/g C Accepted delta Hrxn: -55.8 kJ/mol 1. what is the qwater. pls include formula. 2. calculate delta Hrxnn using the moles, temp and cswater 3. calculate delta Hrxn % error
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Initial Temp of HCl: 22.96 C
Final Temp of HCl: 28.30 C
Moles of HCl: .05 moles
Moles of NaOH: .05 moles
Cs water: 4.184 J/g C
Accepted delta Hrxn: -55.8 kJ/mol
1. what is the qwater. pls include formula.
2. calculate delta Hrxnn using the moles, temp and cswater
3. calculate delta Hrxn % error
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- Aleks data for AgBrO3 is 5.38 x 10^-5Use the following atomic masses (in g/mol): K = 39.1; Mn = 54.94; O = 16; H = 1; P = 30.97; C = 12.01; Na = 23; Mg = 24.31; S = 32.06; Zn = 65.38; Cu = 63.55 In the standardization of Hydrochloric Acid against pure anhydrous Sodium Carbonate, 1mL was found to be equivalent to 0.05g of the primary standard. Compute for the normality of the acid.Calculate the values of vrms, vmp, and vmean for Cl2 (70.90 g mol-1) at 25 °C
- In an Orsat analysis the % CO2 of the product of the combustion is 20% . If percent excess air is 30% . find the maximum percentage of CO2 attainable.1) Mass of flask, aluminum foil, and rubber band 68.45g 2) Temp. Of boiling, water 98.20 0C 3) Barometric pressure 755 mmHg 4) Volume of flask (volume of vapor occupies flask) 152 ml 5) Mass of flask, aluminum foil, rubber band, and condensed vapor 68.60g 6) Mass of condensed vapor is (5)-(1) Find Molecular weight of unknown ______ g / mol Calculation PV = (m/M)RT) è M = (mRT) / PV = ? Unknown liquid- Based on Molecular weight determine which unknown below has this molecular weight: Methanol, Ethanol, Isopropanol, Propanol. UNKNOW IS : __________________________Acetaminophen, a popular drug taken as pain reliever and fever reducer, is produced together with acetic acid from the reaction of 3.05 g 4-aminophenol and 4.1 ml of acetic anhydride. Acetaminophen was extracted at 60% yield. Density of acetic anhydride at 20 C, 1.08 g/ml. Calculate the actual no. of grams of acetaminophen produced. [Determine L.R., E.R.]
- What mass of C2H4 is needed to produce 56L of CO2(g) at 315K and 1.00atm in a combustion reaction with excess oxygen gas? Please show all your workAmmonia (considered to be ideal gas, 1 mole) initially at 25 oC and 1 bar pressure is heated at constant pressure until the volume has tripled.Use CP = 25.895 + 32.999 x 10^– 3 T – 30.46 x 10^– 7 T2 , J/mole-KCalculate: c) delta H d) delta U e) delta S show complete solution1-Pentanol to 1-bromopentane Chemicals: - 60ml Conc. Sulfuric Acid - 100ml Saturated Sodium bicarbonate - 65ml 1-Pentanol - 78g sodium bromide - Distilled water - 58.42g 1-Bromopentane 1-Pentanol Sodium Bromide Sulfuric Acid 1-Bromopentane Formula C5H12O NaBr H2SO4 C5H11Br MW (g/mol) 88.15 102.894 98.078 151.04 Density (g/mL) 0.811 3.21 1.84 1.218 Boiling point (*C) 138 1,396 337 130 NaBr(aq) + H2SO4(aq) -> NaHSO4(aq) + HBr(aq) CH3(CH2)4OH(aq) + H+ Br- (aq) CH3(CH2)4OH2 (aq) + Br-(aq) CH3(CH2)4OH2 (aq) + Br-(aq) CH3(CH2)4Br(aq) + H2O(aq) How do I calculate the percent yield and identify the limiting reagent?
- The maximum dose over 24 hours for OTC (over the counter use) of acetaminophen (medication in Tyleonol) is 4,000 mg. Many OTC and prescription medications contain acetaminophen along with other ingredients. Acetaminophen can be found in many cold medicines and in prescription painkillers such as Norco, which also contains the addictive opiod hydrocodone. Keeping track of sources and amount of acetaminophen is very important for your health. Abuse of Norco due to the opiod can also lead to toxic/lethal doses of acetaminophen. There are now strict regulations on the number of tablets of Norco that can be prescribed (7 day maximum per prescription, not refillable without another prescription). A tablet of Norco contains 325 mg of acetaminophen. Thirty tablets are in a week-long prescription post major-surgery to aid in recovery. How many grams of acetaminophen are in the 30 tablets?Beaker 0.00200 M Fe(NO3)3, mL 0.00200 M NaSCN, mL total volume, mL 1 3.000 2.000 10.00 2 3.000 3.000 10.00 3 3.000 4.000 10.00 4 3.000 5.000 10.00 5 (blank) 3.000 0.000 10.00 In Solutions 1-4 you are adding successively larger volumes of 0.00200M SCN- to the Fe3+ solution and diluting to 10.00 ml. Calculate the final diluted molarity of SCN- in solution #1 Your answer should have 3 sig figs =From this given value of Kc: 2H2S (g) <-------> 2H2 + S2 Kc=2.3 X 10-4 at 1404K What is Kc for: H2 + 1/2S2 <--------> H2S