Chemistry question and answers for September 14, 2023
- Q The equilibrium water vapor pressure table gives the partialpressure of water when the gas is 100.% saturated with water vapor.If the gas you collected was actually only 85% saturated with...
- Q a. A 1 liter solution contains 0.509 Mhypochlorous acid and 0.382 Mpotassium hypochlorite.Addition of 0.191 moles of hydroiodicacid will:(Assume that the volume does not change upon the addition ofhydroiodic acid.)Raise...
- Q Sulfur dioxide and oxygen react exothermically according to thethermochemical equation shown below. Calculate the maximum amountof heat that could be released if 15.0 g of O2 gas is allowed toreact...
- Q If 2.99 g of sodium peroxide (Na2O2) reactwith water to produce sodium hydroxide and oxygen, how many litersof oxygen will be produced at 30.4 °C and 734 torr?2 Na2O2(s) +...
- Q 1) A sample of gas in a balloon has an initial temperature of45C and a volume of 1.28×103 L . If the temperaturechanges to 62C , and there is no...
- Q A 110.0 mL buffer solution is 0.110 molL−1 in NH3 and 0.125molL−1 in NH4Br.Part A (PLEASE ANSWER EVERY PART CORRECTLY :))What mass of HCl will this buffer neutralize before the...
- Q calculate the ph of 1.0 l of a buffer that is .01 m of HNO2 and.15 m NaO2. what is the ph of the same buffer and after the additonof...
- Q Classify each of the following reactions as one of these fourtypes:• spontaneous at all temperatures • not spontaneous at anytemperature • spontaneous below a certain temperature but notabove• spontaneous above...
- Q If at 30F the air has 25% relative humidity, what is therelative humidity at 70F and how much moisture must be added to getit up to 50% relative humidity.
- Q A sample of granite at 85.0 C is immersed into a 75.0g of waterat 24.0C. At equilibrium the temp. is 28.7C, what is the mass ofthe granite? (Cs for granite=.790...
- Q How do 'coupled reactions' allow life (as a biochemical process)to exist?
- Q Arrange the following reaction in order of increasing Svalue.1. H2(g) + F2(g) 2HF(g)2. NH4NO3(s) N2O(g) + 2H2O(I)3. (NH4)2 Cr2O7(s) Cr2O3(s) + 4H2O(I) +N2(g)
- Q A) How many grams of solid sodiumfluoride should be added to 2.00L of a 0.190 M hydrofluoric acidsolution to prepare a buffer with a pH of 2.425?grams sodium fluoride =...
- Q 1. How would the reaction be affected if bromoethane were usedinstead of iodoethane?2. How would the reaction be affected if 2-iodopropane were usedinstead of iodoethane?experiment:http://legacy.earlham.edu/~seuka/Biochemistry/Ex.%2007%20Saccharin%20Alkylation.pdf
- Q I was analyzing the sample in Agilent HPLCand I got 3 peaks at 3.654min, 4.540min and 7.839min with0.1175, 0.1366 and 0.1571 width valuesanyone knows how to calculate N value (#of...
- Q mass spectral measurements were made on 10 replicate lowconcentration Ni-EDTA samples: 146.9 , 111.5 , 125.7 , 140.7 ,109.7 , 179.1 , 130.7 , 135.3 , 124.7 , and 142.3...
- Q what is the new PH of a solution if 10ml of 0.1 M Hcl is addedto 150ml of a buffer system that is 0.1M Benzoic acid and 0.1Msodium benzoate (...
- Q Before working this pre-lab exercise read the theory,experimental precedures and sample calculations outlined in thelaboratory manual. Suppose that a student collects the followingspectrophotometric data to determine the relative concentrations ofHMR...
- Q A 0.4569 g sample of pewter, containing tin, lead, copper, andzinc, was dissolved in acid. Tin was precipitated as SnO2·4H2O andremoved by filtration. The resulting filtrate and washings werediluted to...
- Q ​In the reaction where cyclohexanol is put into a roundbottomflask with phosphoric acid and sulfuric acid and heated in afractional distillation system, why is it important to use a roundbottom...
- Q Calculate the volume, in milliliters, of a solid that has adensity of 7.142g/cm3 and a mass of 232.51g
- Q Figure the percent of mass of Aminiuem nitrate (NH4)² NO3
- Q Calculate the cell potential for the following reaction aswritten at 25.00 °C, given that [Mg2 ] = 0.799 M and [Sn2 ] =0.0160 M. Standard reduction potentials can be found...
- Q 1) If, in using a lead-acid battery to start a car, 1.00 g of Pbis consumed on the anode, how long will it take to recharge thebattery, using a current...
- Q The following electron configurations represent excited states.Identify the element and enter its ground-state condensed electronconfiguration:1s^22s^22p^43s^1[Ar]4s13d104p25p1[Kr]5s24d25p1
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