Chemistry

Mention the most suitable separation technique that may be used to separate the components and explain briefly how separation is achieved under the separation technique Solid components from blood
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In a mixture of oxygen and nitrogen gas, 90% of the total gas pressure is exerted by the nitrogen. If the total pressure is 5.0 atm, what pressure does the oxygen exert? (Number only, 1 decimal place)
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each of the following pairs of solutions produces a reaction. for each reaction, write the balanced molecular and net ionic equations, and classify the reaction as a precipitation, neutralization, gas-forming, or redox reaction. a. sodium carbonate and hydrochloric acid b. silver nitrate and copper c. nickel(ii) bromide and ammonium sulfide d. phosphoric acid and barium hydroxide
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The enthalpy of vaporization for water is 40.7 kJ/mol. Water has a vapor pressure of 101.3 kPa at 100.0 oC. Using the Clausius-Clapeyron equation, what is the vapor pressure for methanol at 77.2 oC?
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what is the concentration (in m) of a sample of the unknown dye with an absorbance of 0.29 at 542 nm?
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which molecule would you expect to be more soluble in ethanol ch3ch2oh), ccl4 or ch2cl2? explain your choice.
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what gas law states that volume and pressure are inversely proportional, while directly proportional to temperature when moles are held constant? a) boyle's law b) charles's law c) gay-lussac's law d) avogadro's law e) combined gas law
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what happens to the rate if the concentration of chlorocyclopentane is tripled and the concentration of sodium hydroxide reamins the same
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nitrogen and hydrogen gases are combined at high temperatures and pressures to produce ammonia, nh3. if 100. g of n2 is reacted with excess h2, what number of moles of nh3 will be formed? hint: be sure to write out the balanced equation!
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does the hydrogen necessary in the electron transport chain come from the splitting of carbon dioxide molecules
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a good extraction solvent will have all the listed qualities except one. which quality listed is incorrect?
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What periodic trend does the atomic radius follow? A. It increases from left to right. B. It decreases from top to bottom. C. It stays the same across the table. D. It decreases from left to right.
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How many formula units are contained in 0. 67 grams of CaO?
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the temperature of a constant volume of gas at 1.00 atm is 25 oc. in order to increase the pressure to 2.00 atm, what temperature is needed?
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Please answer bothThe heat of vaporization for water is 2260 J/g. How much heat in J would be needed to evaporate 8.66g of water?An unknown salt was dissolved to make a total 1.25g of solution. The temperature of the water decreased from 25.1C to 20.4C when 8mol were dissolved. What is the heat of solution in J/mol?
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devise a 6-step synthesis of a carboxylic acid from ethyne using the reagents provided. ethyne is a carbon carbon triple bond, bonded to two hydrogens. three reagents convert this to the main intermediate, an alkene with three bonds to hydrogen and one bond to a propyl group. three more reagents convert this to the product, which is a carboxylic acid bonded to a four carbon chain. reagent 1 is: reagent 2 is: reagent 3 is: reagent 4 is: reagent 5 is: reagent 6 is:
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To neutralize the acid in 10.0 mL of 18.0 M H2SO4 that was accidentally spilled on a laboratory bench top, solid sodium bicarbonate was used. The container of sodiumbicarbonate was known to weigh 155.0 g before this use and out of curiosity its mass was measured as 144.5 g afterwards. The reaction that neutralizes sulfuric acid this way is as follows: H2SO4 + 2 NaHCO3 --> Na2SO4 + 2 CO2 + 2 H2OWas sufficient sodium bicarbonate used? Calculate the limiting reactant and the maximum yield in grams of sodium sulphate.
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fluorine gas and water vapor react to form hydrogen fluoride gas and oxygen. what volume of hydrogen fluoride would be produced by this reaction if of fluorine were consumed?
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alcl3 or fecl3 are also commonly used as catalysts for friedel-crafts alkylations. why might we opt to start with al as the catalyst starting point instead?
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when hydrochloric acid reacts with barium hydroxide, barium chloride and water are produced. the balanced equation for this reaction is:
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we decided to use 5.2 molar equivalents based on our past experience performing this type of reduction. what is the theoretical absolute minimum number of molar equivalents one could use in a sodium borohydride reduction of a ketone like camphor? (think about the structure of sodium borohydride). 2. calculate the % yield of the reaction, clearly showing your work.
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1) It takes 55.0 J to raise the temperature of an 11.0 g piece of unknown metal from 13.0C to 24.1 CWhat is the specific heat for the metal?2) The molar heat capacity of silver is 25.35 J/molC . How much energy would it take to raise the temperature of 11.0 g of silver by 18.1 C?3) What is the specific heat of the silver?
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Compared to the velocity of an earthquakes S-wave, the velocity of the P-wave in the same material is
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if a student decomposes 58.498 grams of aluminum carbonate and she collects the gas and measures 27.68 grams of carbon dioxide, determine the percent yield for this reaction. al2(co3)3 ----> al2o3 3co2
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