Chemistry question and answers for September 02, 2023
- Q 1. Calculate the freezing point of a solution that is made from34.9 g of a nonelectrolyte (ℳ = 172.2979 g/mol) dissolved in 159.9g of solvent. The solvent freezes at 4.20...
- Q A 0.20 M solution of the weak acid HA is 5.5 % ionized HA + H2O--> H3O+ + A-a.Calculate the [H3O+]b.Calculate the [A- ]c.Calculate the [HA] at equilibriumd.Calculate the Ka...
- Q An IR spectra can be divided into three major regionsfor interpretation. Provide a range for these three regions andwhat functional groups and associated peaks value you would expectto see in...
- Q Calculate the volume of nitrogen dioxide produced at 746.0 torrand 20.8°C by the reaction of 6.05 cm3 copper (density =8.95 g/cm3) with 212.4 mL of concentrated nitric acid ifthe acid...
- Q How do I draw the molecular geometry (Including polarity) forNaOH, CaCO3, Ca(OH)2 and Ba(OH)2?
- Q a) Estimate the decay heat load from a 3000 MWt reactor at oneday, one week, one month, and one year after shutdown from a 2-yearrun. b) Estimate the rate of...
- Q 3.11 g of toluene (C7H8) is burned in a bomb calorimeter. Thefollowing reaction occurs. C7H8(l) + 9 O2(g) → 7 CO2(g) + 4 H2O(l)The temperature of the calorimeter changes from...
- Q If you add 35.6mL of 5.20M Hcl to 35.6mL of 7.40M NaOH, thesolution that you generate is what percent NaCl? (Keep in mind thefollowing... you must balance the equation to...
- Q The force constants for F2 and I2 are 470. and 172 Nm−1,respectively. The atomic masses in amu are as follows: 19 F -18.9984, 127 I - 126.9045.1) Calculate the ratio...
- Q Compound A and Compound B are binary compounds containing onlyelements X and Y. Compound A contains 1.000 g of X for every 1.914g of Y. Which mass ratio for Compound...
- Q Draw all the possible isomers for MA4BC
- Q A student placed 14.5g of glucose (C6H12O6) in a volumetricflask, added enough water to dissolve the glucose by swirling, thencarefully added additional water until the 100mL mark on the flaskwas...
- Q Compare samples of helium and neon gases at 25°C.(a) Which gas has the highest average molecular speed?Explain your answer.(b) Which gas has the highest average molecularkinetic energy? Explain your answer.
- Q The following data is available for a solution of lysozyme.Lysozyme (g/L)Osmotic Pressure (mmHg)4.064.46.136.58.188.6510.4210.7512.2612.5514.2614.5516.3116.318.3818.3520.4420.15Determine the molar mass and osmotic virial coefficient forlysozyme.
- Q A. Which of the following buffer systems would be the bestchoice to create a buffer with pH = 9.05?HF/KFHNO2/KNO2NH3/NH4Cl (correct answer)HClO/KClOB. For the best system, calculate the ratio of the...
- Q How do GMOs relate to chemistry and everyday life? What are thepro's and con's of using GMO's/Pesticides? What are the dangersassociated with their usage? Are there natural pesticidesavailable? Do they...
- Q Mass percent KHP using and indicator.Please show your work in chemical units, with known andunknown.Show how you would determine the molarity of a NaOH using thetitration of the NaOH with...
- Q How to identify the kinetic pathway or thermodynamic pathwaybased on example? Show 2 or 3 examplesalso, show how to determine the value from keq and delta G basedon your figure.
- Q 1) Predict the sign, (+) or (-), for∆H and ∆S for the following reactions.2 C(s) + O (g)        2CO(g)                             ∆H: _____                ∆S: _____CO2 (s)     CO2 (g)                                         ∆H: _____                ∆S: _____N2(g)...
- Q a. (3 pts) All Brønsted-Lowry acids contain the hydrogen ion, H+. True Falseb. (3 pts) You can use any acid/conjugate base pair in making abuffer. True Falsec. (3 pts) Concentration...
- Q 1- brilliant colors in fireworks are due to electrons within thecolorant chemicalsa) mixing with water in the atmosphereb) reacting with the ozone layerc) falling back to the ground state2- the...
- Q 1. What is the change in pH when 10.0 mL of 0.010 M HCl is addedto 500 mL of pure water.2. What is the change in pH when 10.0 mL...
- Q please answer the following questions by typing, thanks.1. How different is the measured volume from the volume if ithad been obtained under STP conditions? Is the difference greaterthan an assumed...
- Q If the endpoint in a titration was reached using a volume of37.60 mL and the concentration of the standard NaOH solution was0.3214 M, how many grams of KHP were neutralized...
- Q 1) GC-MS of your sample willresult in a total ion chromatogram and a mass spectrum. Explain theinformation that each contains and label the axes.a) Total Ion Chromatogramb)Mass Spectrum2) Antihistamine contains...
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