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Mertcan Rüzgar

Mertcan R.

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In the question 41 , the most probable speed of the molecules is (a) $1029 \mathrm{~m} \mathrm{~s}^{-1}$ (b) $1161 \mathrm{~m} \mathrm{~s}^{-1}$ (c) $1671 \mathrm{~m} \mathrm{~s}^{-1}$ (d) $917 \mathrm{~m} \mathrm{~s}^{-1}$

In the question 41 , the most probable speed of the molecules is (a) $1029 \mathrm{~m} \mathrm{~s}^{-1}$ (b) $1161 \mathrm{~m} \mathrm{~s}^{-1}$ (c) $1671 \mathrm{~m} \mathrm{~s}^{-1}$ (d) $917 \mathrm{~m} \mathrm{~s}^{-1}$

Objective Physics for NEET

The temperature of an ideal gas enclosed in a chamber is raised from $300 \mathrm{~K}$ to $600 \mathrm{~K}$. The pressure becomes two fold because the: (a) mean molecular velocity becomes $\sqrt{2}$ fold (b) root mean square velocity becomes $\sqrt{2}$ fold (c) number of molecules striking the wall per unit time becomes 2 fold (d) energy transfer to walls per unit time becomes halved

The temperature of an ideal gas enclosed in a chamber is raised from $300 \mathrm{~K}$ to $600 \mathrm{~K}$. The pressure becomes two fold because the: (a) mean molecular velocity becomes $\sqrt{2}$ fold (b) root mean square velocity becomes $\sqrt{2}$ fold (c) number of molecules striking the wall per unit time becomes 2 fold (d) energy transfer to walls per unit time becomes halved

Objective Physics for NEET

Which of the following combinations of Lissajous' figure will be like infinite $(\infty)$ ? (a) $x=a \sin \omega t, y=b \sin \omega t$ (b) $x=a \sin 2 \omega t, y=b \sin \omega t$ (c) $x=a \sin \omega t, y=b \sin 2 \omega t$ (d) $x=a \sin 2 \omega t, y=b \sin 2 \omega t$

Which of the following combinations of Lissajous' figure will be like infinite $(\infty)$ ? (a) $x=a \sin \omega t, y=b \sin \omega t$ (b) $x=a \sin 2 \omega t, y=b \sin \omega t$ (c) $x=a \sin \omega t, y=b \sin 2 \omega t$ (d) $x=a \sin 2 \omega t, y=b \sin 2 \omega t$

Objective Physics for NEET

Questions asked

INSTANT ANSWER

NaoH 0.08M 500 ml buffer ph=4.5 AeOH ( pure of 1.0s)

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INSTANT ANSWER

Laboratory work №2 Objective of the work: introduction to the volumetric technique. Reagents and equipment: Concentrated HCl; 0.1 N NaOH; areometer; burette; 100 mL volumetric flask; 100 mL Erlenmeyer flask; 10 mL volumetric pipette; methyl orange. Work sequence: 1) make 0.1M HCl by dilution of concentrated solution. 2) refine concentration of the solution obtained by titration with 0.1 N NaOH. 3) Using thus prepared HCl solution, determine concentration of base in the sample solution. 1) Preparation of 100 mL of 0.1 M HCl Measure the density of conc. HCl by areometer. Using the table of densities, determine the concentration of the acid. Calculate the necessary volumes of conc. HCl and water to prepare 100 mL of 0.1 M HCl. Add ~ 50 mL of distilled water to the volumetric flask, then add the 13 calculated volume of conc. HCl from the burette and fill the flask to the mark with distilled water. Mix the solution thoroughly. 2) Refinement of the concentration of the prepared solution Take 0.1 N NaOH solution from Assistant. Take 10 mL of this solution into Erlenmeyer flask by volumetric pipette. Add 1-2 drops of methyl orange soln. Fill the burette with prepared solution of HCl. Add this solution to the flask dropwise until beginning of colour change. Put down spent volume of HCl solution. Repeat this procedure thrice. Calculate the average volume and precise concentration of HCl solution C N (HCl) from the law of equivalents: C N (NaOH)xV(NaOH) = C N (HCl)xV(HCl) Calculate relative error which has been made in the process of preparation: Δ=[C N (HCl)-0.1]/0.1 3) Quantitation of NaOH in the test solution Fill the clean burette with prepared solution of HCl of known concentration. Put 10 mL of alkaline solution (got from Assistant) by volumetric pipette into Erlenmeyer flask. Add 1-2 drops of indicator solution. Perform titration of alkaline solution thrice. Calculate mean volume of HCl spent. Calculate (using law of equivalence) lye concentration in the analyzed solution. Exercises: 1) What is the essence of volumetric analysis? 2) What is the equivalence point and how it is determined? 3) Which indicators belong to acid-basic family? 4) Formulate the law of equivalence. How it is used in volumetric analysis? 5) Why molar and equivalent concentrations are equal for HCl and NaOH solutions?

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INSTANT ANSWER

21:05 numerade.com/ask/q? Numerade 3.içeren_bir örnek2kmol tek atomlu ideal gaz, ?ekil 10.3'teki gibi i?lem... 3. içeren bir örnek2kmol tek atomlu ideal gaz, ?ekil 10.3'teki gibi i?lem döngüsünden geçirilir. de?erlerini bulun \( T_{\mathrm{A}}, T_{\mathrm{B}} \mathrm{Ve}_{\mathrm{V}} \). 3 Bir termodinamik 3. A sample containing \( 2 \mathrm{k} \) mol of monatomic ideal gas is put through the cycle of operations as in Fig. 10.3. Find the values of \( T_{\mathrm{A}}, T_{\mathrm{B}} \) and \( V_{\mathrm{C}} \). 3 A thermodynamic ANINDA CEVAP UZMAN ONAYLI Ad?m \( 1 / 4 \) Öncelikle verilen parametrelerin de?erlerini bilmemiz gerekiyor. Ne yaz?k ki soru, ba?lang?ç s?cak????, hacim va??a bas?nç gibi parametreler için herhangi bir spesifik \( { }^{\prime} \) sa?lamamaktad?r. Ancak yine de de?erlerinin nas?l bulunaca??n? tart??abiliriz. \( { }_{T_{\mathrm{A}}, T_{\mathrm{B}}} \mathrm{Ve}_{V_{\mathrm{C}}} \) Genel anlamda .

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ANSWERED

Angela Williamson verified

Numerade educator

v20 1) What is the freezing point of a solution of dibromobenzene, C6H4Br2, in 0.250 kg of benzene, if the solution boils at 83.5°C? Kb=2.6°C/m, Kf=5.062.6 °C/m 2) What concentration of NaF is required to make pH=3.63 in a 0.3 M aqueous solution of HF? Ka= 6.8×10-4 3) Recently, the skeleton of King Richard III was found under a parking lot in England. If tissue samples from the skeleton contain about 93.79% of the carbon-14 expected in living tissue, what year did King Richard III die? The half-life for the carbon-14 is 5730 years. 4) Determine the equilibrium constant for the following reactions. Fe3+ + I- ? Fe2+ + I2(aq) E°(Fe3+/Fe2+)= 0.77V, E°(I2/I-)= 0.54V v18 1) The osmotic pressure of a solution containing 7.0 g of insulin per liter is 23 torr at 25°C. What is the molar mass of insulin? 2) What is [OH-] in a solution of 1.25 M NH3 and 0.78 M NH4NO3? Kb of the base is 1.9×10-5. 3) Fluorine-18 is a radioactive isotope that decays by positron emission to form oxygen-18 with a half-life of 109.7 min. (A positron is a particle with the mass of an electron and a single unit of positive charge; the equation is 18/9 F ? 18/8 O + e+.) Physicians use 18F to study the brain by injecting a quantity of fluoro-substituted glucose into the blood of a patient; glucose accumulates in the regions where the brain is active and needs nourishment. What is the rate constant for the decomposition of fluorine-18? If a sample of glucose containing radioactive fluorine-18 is injected into the blood, what percent of the radioactivity will remain after 5.59 h? How long does it take for 99.99% of the 18F to decay? 4) Determine the equilibrium constant for the following reactions. Fe2+ + Ni(s) ? Ni2+ + Fe(s) E°(Ni/Ni2+)= -0.23V, E°(Fe/Fe2+)= -0.41V

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ANSWERED

Timothy James verified

Numerade educator

One gm mole of an ideal gas expands adiabatically from an initial temperature T_I to a final temperature T_F (T_I > T_F): then the work done is (a) C_v (T_I - T_F) (b) C_p (T_I - T_F) (c) R (T_I - T_F) (d) zero

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ANSWERED

Hubert Agamasu verified

Numerade educator

Second law of thermodynamics limitations of the first law of thermodynamics

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INSTANT ANSWER

3. A sample containing \( 2 \mathrm{k} \) mol of monatomic ideal gas is put through the cycle of operations as in Fig. 10.3. Find the values of \( T_{\mathrm{A}}, T_{\mathrm{B}} \) and \( V_{\mathrm{C}} \). 3 A thermodynamic

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