Chemistry question and answers for August 17, 2023
- Q The steroid hormone estriol contains only C, H, and O;combustion analysis of a 3.47 mg sample yields 9.53 mgCO2 and 2.60mgH2O. On dissolving 7.55 mg of estriol in 0.500 g...
- Q The vapour pressure of liquid A at 300 K is 76.7 kPa and that ofpure liquid B is 52.0 kPa. These two compounds form ideal liquidand gaseous mixtures. Consider the...
- Q Agas sample occupies 1.8L at 25 degre Celcius and 2.0 atm. Whatvolume will it occupy at STP?
- Q If you were to leave calcium metal in contact withoxygen at a partial pressure of 1.00 atm at 298 k, would thecalcium oxide form spontaneously? Use free energy to answerthis.
- Q It takes 25 ml of 0.40 M nitric acid solution to completelyneutralize 50.0 ml of 0.20 M NH3 solution (i.e. to reach theequivalence point). What is the pH of the...
- Q Discuss how well VSEPR predicts shape, how shape contributes tochemical reactivity, and how computer modeling can help supportyour predictions.
- Q briefly explain on a fundamental chemical basis what effectadding charges has on the polymer chain and how this relates topolarons and charge transport within the organic material. Thendescribe three different...
- Q The question I have is what are the balanced equations and netionic equations for the four following scenarios.1. Dissolving solid NaOH in water2. Neutralization reaction of NaOH (aq) with 1.00...
- Q Imagine that you are in chemistry lab and need to make 1.00 L ofa solution with a pH of 2.60.You have in front of you100 mL of 7.00×10−2M HCl,100 mL...
- Q 1) Dichlorine monoxide is a powerful oxidizing agent that isused to bleach wood pulp and to treat municipal water supplies. Itis made by the reactionSO2(g) + 2Cl2(g) SOCl2(g) + Cl2O(g)If...
- Q Energetics. We have learned that all metabolic pathways must bethermodynamically downhill. How can the citric acid cycle work eventhough the ∆G°’ of the last reaction is > 0? Explain therelevance,...
- Q Describe theBohr model of the hydrogen atom, and explain how Planck's quantumtheory contributed to it
- Q 10ml of cyclohexnol to cyclohexene10ml of cyclohexnol X 0.96g/ml =9.6g9.6X1mole/100=convert using the MV 82g/1and count the precent yeild ?
- Q The IR spectrum of HCN shows 3 absorption bands at 3312 cm^-1,2089 cm ^-1, and 712cm^-1. From this info alone can you deducewhether HCN is linear or not? Explain.
- Q Calculate the energy difference for a transition in the Paschenseries for a transition from the higher energy shell n=5.Express your answer to four significant figures and include theappropriate units.
- Q 1) For NMR, what are o2p and o1p?2) How does one determine the correct values for theseparameters?
- Q For the system SO3 ( g) ⇔ SO2 (g ) + 1 2 O2 ( g) at 1000 K, K =0.45. Sulfur trioxide, originally at 1.00 atm pressure, partiallydissociates to...
- Q Consider the isotopes of oxygen 16O and18O. These form three diatomic molecules:16O16O, 16O18O, and18O18O.(a) What are the relative average translational kinetic energiesfor these three diatomic molecules at 25â—¦ ?(b) Describe...
- Q Ifn = 4 l=1 ml=0 ms= -1/2What is the element , what is the elements complete electronconfiguration WITHOUT noble gas abbreviation & is itparamagnetic or diamagnetic??
- Q 1. Use Hess’s Law to determine the ΔH for the vaporization ofmethanol, CH3OH, given:2 C (s) + 4 H2 (g) + O2 (g) → 2 CH3OH (g) −402.4 kJ/mol2 C...
- Q Describe how you can purify a sample of toluene suspected to becontaminated with benzene?
- Q What are the cause of acidic soilWhat are the pons and cons of acidic soil
- Q Describe the difference between a \"homolytic bond dissociationenergy\" and a \"heterolytic bond dissociation energy\". In mostcases, for a given type of chemical bond, the homolytic bonddissociation energy is less than...
- Q 1. Determine the enthalpy for this reaction:2NaOH(s)+CO2(g) Na2CO3(s)+H2O(l)2. Consider the reactionNa2CO3(s)Na2O(s)+CO2(g)with enthalpy of reactionHrxn=321.5kJ/molWhat is the enthalpy of formation of Na2O(s)?Express your answer in kilojoules per mole to one decimalplace.
- Q Determine the minimum concentration of the precipitating agenton the right to cause precipitation of the cation from the solutionon the left.A. 4.0×10−2M Ba(NO3)2;NaFB. 8.5×10−2M CaI2;K2SO4C. 1.8×10−3M AgNO3;RbCl
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