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Helium gas is contained inside a piston cylinder assembly as shown in the figure. Initially the gas is
having pressure 1 bar and volume 0.01 m3. Then the current is supplied, and the gas is heated such that the final pressure is 1.2 bar and the final volume is 0.0145 m3
10 % of the electrical energy supplied to the gas is lost as heat from the cylinder. Determine the followings. If necessary, make assumption(s) with justification.
(a) How long the current is supplied if process is ideal?
(b) How long the current is supplied if process is real?
The equilibrium mixture is found to contain 0.07, 0.11,0.03 and 0.03 moles of CO ,H2, CH4, H2O respectively for the reaction:
CO(g)+3H2(g)0. CH4=H2O(g)
I NEED THE ANSWER PLEASE!!!
For each of the following molecules, write the Lewis structure(s), predict the molecular structure (including bond angles), give expected hybrid orbitals on the central atom, and predict the overall polarity. a. OF2 b. AsF5 c. IF5
Steel wool , which is made of pure iron metal, burns with oxygen gas to produce ferric oxide (Fe2O3). Fe(s) + O2(g) ( Fe2O3
If there are 1.25 moles of Fe and 1.25 moles of O2,
How many moles of Fe2O3 will be produced? What is its mass?
If the actual laboratory yield is 95.8g Fe2O3, what is the rection’s percent yield?
Pure aluminum (Al) metal reacts with hydrocholoric acid (HCl) to produce aluminum chloride (AlCl3) and hydrogen (H2) gas.
Write the balanced chemical equation for the reaction described above.
If the expected mass of AlCl3 to be formed is 3.5g, what should be the initial mass of the pure aluminum metal?
If the actual mass of AlCl3 produced is 3.1g, what is the percentage yield of the reaction?
How many moles of O2 will be formed if 5.0 moles of H2O decomposed into H2 and O2?
Chemical Equation: H2O ( H2 + O2
How many moles of O2 are needed to burn 100 g of propane (C3H8)?
Chemcial Equation: C3H8 + O2 ( CO2 + H2O
If 50.0 grams of Cl2 gas is reacted with enough sodium hydroxide (NaOH), calculate the following:
Mass in grams of sodium hypochlorite (NaOCL) produced
Moles of sodium chloride (NaCl) produced
Chemical Equation: NaOH + Cl2 ( NaOCl + NaCl + H2O
2. A solution containing 0.402 49 g of CoCl2 ∙ xH2O (a solid with an unknown number of waters of hydration) was exhaustively electrolyzed to deposit 0.09937 g of metallic cobalt on a platinum cathode by the reaction Co2+ + 2e- Co(s). Calculate the number of moles of water per mole of cobalt in the reagent.
1. A 50.0-mL aliquot of unknown Cu(II) solution was exhaustively electrolyzed to deposit all copper on the cathode. The mass of the cathode was 15.327 g prior to electrolysis and 16.414 g after electrolysis. Find the molarity of Cu(II) in the unknown.
The standard enthalpy of formation, ΔH˚f of liquid ethanol, C2H5OH(l) @ 25C is -277.63 kJ/mol. Calculate its heat of combustion at constant pressure from the given reaction, C2H5OH(l)+ 3 O2(g) → 2 CO2(g) + 3 H2O(l). ΔH˚f CO2=-393.50 kJ/mol ΔH˚fH2O= -285.84 kJ/mol
Solid lime (CaO) reacts with chlorine gas (Cl2) to form laundry bleach (CaOCl2). Calculate how many moles of chlorine gas is required to produce 1.000 kg of laundry bleach.
Titration of 0.2121 g of pure Na2C2O4 (134.00 g/mol) required 43.31 mL
of KMnO4.What is the molar concentration of the KMnO4 solution? The
chemical reaction is
2MnO4 + 5C2O4+ 16H* ->2Mn+ 10CO2+ 8H2O
