Chemistry question and answers for August 18, 2023
- Q The active ingredient in a zinc nutritional supplement isZnSO4·7H2O (molar mass = 287.58 g/mol). Ten zinc tablets containinga mix of the active ingredient and an inactive filler were groundand mixed...
- Q 1) The pressure inside a hydrogen-filled container was 2.10 atmat 21 ∘C. What would the pressure be if the container was heated to87 ∘C ?2) At standard temperature and pressure...
- Q Coal powered electricity has only about 30%total efficiency (i.e. from point of combustion toyour home) – give a technical explanation of why this is so. ​
- Q What are the benefits and drawbacks in CZE (Capillary ZoneElectrophoresis) with other more conventional separation technique,such as HPLC (High Performance Liquid Chromatography)?
- Q Technetium-99 is used as a radioisotope in a variety of medicalapplications . if a patient receives a dosage of 6.00 mg at 8 am onthursday , then how much would...
- Q At 1 atm, how much energy is required to heat 49.0 g of H2O(s)at –10.0 °C to H2O(g) at 119.0 °C?
- Q Naphthalene is mostly insoluble in water. How would yourecrystalize benzoic acid contaminated with naphthalene?
- Q HOI + NO = I2 + NO3-1 balance the following reaction in acid
- Q Ifa small stream of liquid A was strongly deflected by a chargedobject, liquid B was moderately deflected, and liquid C was weaklydeflected rank the liquids in order of increasing polarity
- Q General Chem 1Compare the current quantum mechanical model of the atom to theclassical ( pre-1913 ) model. Identify similarities and at leastthree differences. Reference to historical development leading tochanges may...
- Q Use the Henderson–Hasselbalch equation to calculate the pH ofeach solution:Part Aa solution that is 16.5 g of HF and 22.0 g of NaF in 125 mL ofsolutionPart Ba solution that...
- Q can someone please give me name, structure and percebtage ofFAME that are likely produces from the vegetable oil? i need 3! andit has to be similar to the fatty acid...
- Q A buffer solution was prepared by dissolving 4.00 grams ofsodium propanate (NaCH3CH2CO2, FM 96.06 g/mol) in a solutioncontaining 0.100 moles of propanoic acid (CH3CH2CO2H) and dilutingthe mixture to 1.00 L....
- Q Starting with a ccp array of anions,what structure types are generated by a) filling all tetrahedralsites with cations, b) filling half of the tetrahedral sites, e.g.T+, with cations c) filling...
- Q aSuppose hydrogen atoms absorb energy so that electrons areexcited to the  n = 7 energy level. Electronsthen undergo these transitions, among others:(a)  n = 7 to  n =1(b)  n = 7 to  n = 6(c)  n...
- Q The Determination of Magnesium by Direct TitrationPreparation of Solutions:Buffer solution, pH 10: Diluted 57mL of NH3 and 7gNH4Cl totaling 100mL solutionEriochrome Black T: Dissolved 102.4mg in 15mL ethanolamine and5mL of...
- Q Deep water fish are hard to transport to the surface safely. Whydo you think that is?As the water pressure decreases, there is not enough oxygen forthe fish in the waterAs...
- Q Part 1: A 1.07 g sample of caffeine (C8H10N4O2) burns in aconstant-volume calorimeter that has a heat capacity of 7.28 kJ/K.The temperature increases from 297.65 K to 301.38 K. Determine...
- Q Hi! Can someone summarize what the reaction article is saying? Iam having trouble understanding it.The purpose of this experiment was to investigate the catalyticperformance of solid acid catalyst developed from...
- Q Consider the following portion of the energy-level diagram forhydrogen:n=4–0.1361 × 10–18 Jn=3–0.2420 × 10–18 Jn=2–0.5445 × 10–18 Jn=1–2.178 × 10–18 JIn the hydrogen spectrum, what is the wavelength of lightassociated...
- Q What salt is produced in each of the following neutralizationreactions?HNO3(aq)+KOH(aq)→H2O(l)+?HNO3(aq)+Ca(OH)2(aq)→H2O(l)+?HCl(aq)+Ca(OH)2(aq)→H2O(l)+?HCl(aq)+KOH(aq)→H2O(l)+?Drag the appropriate items to their respectivereaction. K2NO3, KNO3, Ca(NO3)2, CaNO3, CaCl, CaCl2,KCl2, KClReaction A-Reaction B-Reaction C-Reaction D –Not a product...
- Q Identify and explain the different conductivity regimes. Wheredoes ionization dominate? How about Intrinsic behavior?
- Q Uranium hexafluoride (UF6) sublimes from a solid to a gas andboils at a very low temperature of 56.5 oC. UF6 is used in theenrichment process of the production of fuel...
- Q Air containing 1.6 vol% sulphur dioxide is scrubbed withpurewater in a packed column of 1.5 m2 cross sectional area and 3.5 mheightpacked with no.2 plastic Intalox saddles, at a pressure...
- Q A magnesium electrode in 1 M MgSO4 and an ironelectrode in 1 M FeSO4 are in electrical contact forminga galvanic cell. Determine the direction the electrons flow, writethe reaction that...
Get Answers to Unlimited Questions
Join us to gain access to millions of questions and expert answers. Enjoy exclusive benefits tailored just for you!
Membership Benefits:
- Unlimited Question Access with detailed Answers
- Zin AI - 3 Million Words
- 10 Dall-E 3 Images
- 20 Plot Generations
- Conversation with Dialogue Memory
- No Ads, Ever!
- Access to Our Best AI Platform: Flex AI - Your personal assistant for all your inquiries!