calculate the % (m/m) of helium gas in a mixture containing 15.0 g of helium gas and 45.0 g on nitrogen gas

Q: Which statement best describes the reaction TiCl4(l) + 2H2O(l) --> TiO2(s) + 4HCl(aq) at a low…

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Q: 4. Write the product and give mechanism. (i) *CO PheFe Et (ii) =CH3 RCN.. PMes Rh H, Me,P

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Q: Which of the following half reactions is MOST LIKELY TO OCCUR at the cathode of an electrolytic cell…

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Q: 6. Much of the communication between insects is achieved through the use of chemical messengers, or…

A: A. Molecular formula : C11H24. B. IUPAC name : Undecane.

Q: arrange the elements in order of decreasing atomic radius : Osmium, Platinum,Lead by drawing the…

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Q: Given a 1.00 L solution containting 1.00 x 10^-2 M each of Ca2+ and Ag+. A 1.00 M Na2CO3 solution is…

A: Given that Concentration of Ca+2 = 1.00 × 10–2 M Concentration of Ag+1 = 1.00 × 10–2 M Ksp of CaCO3…

Q: Given the cell notation Pt /Cl2(g)/Cl¯(aq) // Zn+2(aq)/Zn. How long, in seconds, will it take for…

A: Given-> Weight of Zn =1.000 gm Atomic mass of Zn = 65.38 gm Current (i) = 2.000 ampere

Q: Calculate the final temperature, in degrees Celsius, for each of the following, if n and V do not…

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Q: pH of the solution that results when 20.0 mL of 0.175 45.0 mL with distilled water.

A: Givrn, Ka(Formic acid) = 3.74 M1 = 0.1750 M Volume (V1) = 20.0 mL V2 = 45.0 mL Using dilution law,…

Q: Draw the product of the reaction shown below. Ignore inorganic byproducts. 1. CH.CH2MGBR 2. H3O*…

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Q: Which of the following molecules would be the least polarizable? O CH3CH3 O SİH3SİH2SİH3 O SİH3SIH3…

A: The polarizability of a molecule is determined by the net polarity of the bond, or in other words,…

Q: 3. Consider the following thermochemical equation: ZnSe) + Ozie) - ZnO(s + SO2 (e) How much heat is…

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Q: Be sure to answer all parts. A freshly isolated sample of 90y was found to have an activity of 9.7 x…

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Q: Equations: Conc/Abs = Conc2/Abs2 MW salicylic acid: 138.12 g/mol Determine the concentration of your…

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Q: 1. Gold-198 is used in the diagnosis of Ilver problems. If the half-life of Au-198 is 2.69 days: a…

A: Given-> Half life = 2.69 days Initial amount = 9.21 mg Time = 72.9 days

Q: Question 15 of Draw the major product of this reaction. Ignore inorganic byproducts. 1. LIAIH4 2.…

A: ->LiAlH4 is reducing agent which can reduce acid halide into alcohol.

Q: Question 1 Methane CH4) can be captured from landfills and farms and burned as fuel. This process…

A: Carbon dioxide (CO2) is the most significant greenhouse gas.Of the greenhouse gases, carbon dioxide…

Q: which of the following cases is water acting as a Lewis acid and Arrhenius acid:   A. H2O(l) +…

A: ->Water acts as Lewis acid when accepts electron pair from base. ->water acts as Arrhenius…

Q: 3. The maximum buffering capacity is nearest to the pka of the buffer. Explain why?

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Q: The equilibrium constant, Kc, for the following reaction is 4.91×10-3 at 678 K. NH4I(s) NH3(g) +…

A: Kc is the ratio of the equilibrium concentrations of product over equilibrium concentrations of…

Q: Which of the following will produce a solution that is less than 7 (i.e. acidic solution)? Select…

A: Answer: We need a solution that has pH less than 7, which means solution must be acidic and that…

Q: 1. A 300 increased in the internal energy of the system happen while it expands to do 75.25 J of…

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Q: odn an s HC CI- 7) the following reaction is of type: A) Markovnikov hydrogenation B) markovnikov…

A: ->When alkene reacts with HCl then it proceeds through formation of carbocation and markovnikov's…

Q: HBr(aq) + ZnS(s) → Express your answer as a chemical equation including phases. View Available…

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Q: On a 5 day wilderness expedition you'll need to heat 5.0 kg of water to the boiling point each day.…

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Q: Draw the Lewis structure for the chlorine trifluoride (ClF,) molecule. - C

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Q: Table 3 Mass (g) Calorimeter 19.78 Calorimeter & Room Temperature Water 117.97 Room Temperature…

A: The heat capacity of calorimeter is needed to be calculated.

Q: The Kea for the equilibrium below is 3.52 x 10-2 at 480.0 °C. 2Cl2 (g) + 2H20 (g) = 4HCI (g) + 02…

A: Given:: 2Cl2 + 2H2O <=> 4HCl + O2 -----(i) K1=3.52×10-2

Q: A sample of air is determined to have an NO2 concentration of 75.7 µg/m³. What is this concentration…

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Q: A balloon at 30.0°C has a volume of 222 mL. If the temperature is increased to 53.1°C and the…

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Q: Complete and balance the following equation. The missing term is _____.                   Rb-92    →…

A: Rb -92 ---> ___ + -1b0 There occur beta elimination reaction . In beta elimination reaction…

Q: The carbon-14 decay rate of a sample obtained from a young tree is 0.263 disintegration per second…

A: Solution - According to the question - Given - Ao = initial activity = 0.263dps A = activity at time…

Q: How many Faradays are needed to completely electrolyze one mole of Cu2+ ions?

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Q: 18 mL 0.10 M HClO (Ka= 3.5x10-8) was titrated with 0.06 M NaOH. Calculate the pH after the addition…

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Q: whats the oxidation and reduction half reaction? H2O2(aq) + I'(aq) → H2O(1) + 3´(aq) (not balanced –…

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Q: The free energy change for the following reaction at 25 °C, when [H+] = 1.11 M and [Sn2+] =…

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Q: Both HC2O4- and HS- are amphoteric. Enter an equation to show how HC2O4- can act as a base with…

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Q: When copper chloride reacts with sodium nitrate, copper nitrate and sodium chloride are formed.…

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Q: Describe the difference between of hybrid orbitals such as sp

A: Hybridization can be defined as process in  which there is mixing of two or more atomic orbitals to…

Q: Hydroboration, hydrogenation, catalytic hydrogenation, radical addition, oxidation, oxidation…

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Q: During recharge the following reactions occur in the lead-acid battery.          Cathode: PbSO4 (s)…

A: At cathode -> PbSO4(s) + 2e-------> Pb(s) + SO42-(aq) At Anode -> PbSO4(s) + 2H2O…

Q: Which chemical reactions in the ozone layer cause ozone depletion? Oxygen reacts with ozone to form…

A: Given,  Which chemical reactions in the ozone layer cause ozone depletion = ?  Options are :  A.…

Q: Iodine-131 is used medically for the diagnosis of thyroid illnesses. The rate constant for t decay…

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Q: e-angle formulas for these alkanes and cycloalkanes an

A: in bond-line formula, corners and end of line are represented as carbon atoms .

Q: What type of distillation do we use to separate a mixture of water and acetic acid and why?

A: Distillation is the process by which two liquids are separated from a mixture through evaporation…

Q: i need help in  comparing ir spec of 1,4-dimethoxybenzene versues  1,4-dimethoxybenzene and what is…

A: We need to compare the IR spectra of the two compounds:   2,5-di-tertbutyl-1,4-dimethoxybenzene and…

Q: Jsing the equilibrium below, select the statement consistent with favorability OH + -F Reaction is…

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Q: Consider the following reaction at 25 °C: 3 NiO(s) + 2 NH (g) → 3 Ni(s) + N,(g) + 3 H̟O(g) kJ If AG°…

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Q: HO NH2

A: Detail mechanistic pathway is given below to carry out the following conversion

Q: Calculate the cell potential for the galvanic cell in which the given reaction occurs at 25 °C,…

A: [Cr2+] = 0.00190 M [Au3+] = 0.824 M ->Answer may differ slightly because values of standard…