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- 0 Cals) + NAC lag) – O White the balanced molecular chemical equation for the reachion f Solid lithium with aqueo us Chromium (111) acetat: 4 no iea chun occurs, write UR. Idaite a balanced molecular Chemical equahion for the Solia Sodium with aqueous Zinc perchlorite . 7 no geaction ccuns,I 11 Some lighters contain a hydrocarbon, a) Express the molar mass of an isomer in The percentage, by mass, of carbon in which is a mixture of isomers of general for- mula CnH2n+2, where n is to be determined. kitch The percentage, by _mass, of carbon these isomers is 82.8%. the Ass the r the terms of n. Cond b) Express the percentage, by mass, of car- bon in terms of n. Deduce the molecular formula of the considered isomer. c) Give their condensed structural formulas and their names. |14To exomine the reock n rote of tem pero tu mn Q,+ Ca0 + CO2 » M2+ An experinment is corried Out in w hich the reoo tiN is ociunc. In the experiment tne frst test tube is Fm L 8x 104 M KMn Ou ond ImL 0.25M HesOyinto the secod test tube 4 mL 2,5x 10?M H2 204 is benp Put. When both test tubes ge broupht to thermol equilibrium both wth temperoture of in the Noter 25°C. The soluti on cotoining t2 CO is tronsferre d ether tost tube. Mhot the is the reocon fron the nonent of odd. Hon Stop uuo tch the う tエ de tected second c.The doke re oetion is repeotad Por us°C from this ex perimen t-Tobles The folowine question onswers, Os e piven. e ccordnp to this quote- Tem Pero tule ( time Isecoid 25 253 the effect of tomperature rate unhe the a. Exploin the reao t form lo ArrheninS
- A formula for compounding state qs ad 250 ml. This expression meansFluorite, a mineral of calcium, is a compound off the metal with fluorine. Analysis shows that a 43.35-g sample of fluorite contains 21.11 g of fluorine. Calculate the following: (a) Mass of calcium in the sample. g Ca (b) Mass fractions of calcium and fluorine in fluorite. Calculate to 3 significant figures. mass fraction Ca mass fraction F (c) Mass percents of calcium and fluorine in fluorite. Calculate to 3 significant figures. mass % Ca mass % FForeattt part of iTIS qtestfoni; tonsider FOHOWIHg Btetat: You need to make a stock solution of Ca( C2H3O2 )2 with a concentration of 6.50 M. You have a 850.0 mL volumetric flask available to make this stock solution in. You are then tasked with using this stock solution to prepare a sample for use in an experiment. The experimental sample should have a final volume of 15.0 mL and a concentration of 0.350 M Ca(C2H3O2)2. a) What is the molar mass of Ca(C2H3O2)2? b) How many moles of the solute would be needed to create the stock solution using the volumetric flask available? c) How many grams of the solute should be added to the volumetric flask to create the stock solution? d) What volume, in mL, of the stock solution should be used to prepare the experimental solution through dilution? US 目 M
- mete, 900. S: To mi vansteianos Ens comu SAM BO BOY E 1938 Bits Vousletanoo oni ovoight mi Intimhoqxo novigs gaivormi no au ubat mils over noyz son A to us has no 6.302oni iw tarta (98.950) * (4.184) * (368-21.5) como 602 nirtive envy tedt rowehs no bonisido svad bloode nov and bannot done K vitamos tramiroqxs * The temperature of 98.450 g of an aqueous solution increases from 21.5 °C to 368 C. Calculate 0 the change S in heat content (9) of this solution Express your answerin units of Kilojoules. Assume the specific heat capacity of the solution is 4184 J/g °C. Input your answer to three Significant figures do not include units with your answer input. To Answer 6.30 KJ re called * you calculate a value of 6.11kJ 9 surroundings (also solution in this experiment). Calculate system (also called greaction in this experiment). Do not include the units in your answer.(d) Br. e 0.. K :Q'Bu(b) 1. CH3CH₂COCI, AICI3 2. Br₂, CH3CO₂H 3. K+tBuO 4. OsO4 then NaHSO3 5. H₂CrO 4 *%85 l Sn [F ? ChemDoodleⓇ
- 5-) 1,200 grams of aluminum of an impure NH4AI(SO4)2 sample is converted into Al203 by precipitation with aqueous ammonia and heating. It seems that this comes to 0.1798g. Accordingly, determine the amount of a)% Al203 b)% Al in the initial sample.II. A.Give at least 3 primary standards for standardization of (a) HCl, H2SO4, (b) NaOH, KOH, Ba(OH)2 B. State the properties of each primary standards and the limitations as to its application. pls answer B0,500 of Nacl containing scmple weigh 25ML of cund treat with 0.1086 M mpNO3 sowhen. The remaning nou? rs 11.3mL of ol010 M KSCN. HOW many Nacl tArated with found m the sample? Find mass percantape NOu M the Sample ? CNOCI =58.5 plmol)