06/14/22

Finding the density
8. Calculate the density of propane gas, C3H8, at 20.0oC and 1.15 atm? 2 marks.
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06/14/22

Finding the density
8. Calculate the density of propane gas, C3H8, at 20.0oC and 1.15 atm? 2 marks.
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06/14/22

Empiricial and molecular formula
An unknown sample contains 84.415 % carbon, and 15.585 % hydrogen. It has a molar mass of 142.3g/mol. Determine the empirical formula and the molecular formula
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06/14/22

Concentrated acid
Concentrated sulfuric acid is 18.0 M. You need to make a 2.0 L of 1.0 M solution from this concentrated acid. What volume of the original acid do you use?
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06/13/22

In the reaction between 97.49 grams of zinc and 2.53 moles of HCl, what is the maximum mass in grams of ZnCl2, 136.29 g/mol, produced? Report your answer with 2 decimal places.
zn(s) +2HCl(aq)-> H2(g)+ ZnCl2(aq)
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06/13/22

VII. Finding Similarities and Differences: O3 and OF2
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06/13/22

Finding Similarities and Differences: BF3 to PF3
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06/13/22

Balance the following chemical reactions, determine the type of reaction and whether each is a redox reaction: Cl2 + NaBr → Br2 + NaCl
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06/13/22

Balance the following chemical reactions, determine the type of reaction and whether each is a redox reaction: C7H6O2 + O2 ---> CO2 + H2O
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06/13/22

Balance the following chemical reactions, determine the type of reaction and whether each is a redox reaction: Al2(SO4)3 + Ca(OH)2 ---> Al(OH)3 + CaSO4.

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06/13/22

Chemistry help please
What is the mass in gram 5.00 mol of barium chloride
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06/12/22

Calculate the pH and concentrations of CH3NH2 and CH3NH+3 in a 0.0319 M methylamine (CH3NH2) solution. The 𝐾b of CH3NH2 is 4.47×10−4.
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06/12/22

Electrochemistry

Given that Zn/Zn2+(1M)//Cu2+(1M)/Cu(a) calculate the emf of the cell(b) predict if the reaction is spontaneous or non spontaneousGiven that Zn/Zn2+ E=0.34V, Cu2+/Cu E=1.10V
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06/12/22

Electrochemistry

Calculate the emf of the following voltaic cells;(a) Pt/Fe2+(0.1M),Fe3+(0.2M)//Ag+(1M)/Ag(b)Zn/Zn3+(10^-3M)//Ag+(10^-3M)/Ag(c)Al/Al3+(0.1M)//Sn2+(0.37M)/Sn
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06/12/22

Electrochemistry

Given Cu2+/Cu=0.34V and Cu2+/Cu+=0.153V, calculate the equilibrium constant for the reaction Cu + Cu2+<->2Cu2+
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06/12/22

Electrochemistry

Given the Ag+/Ag=0.8V, Cu2+/Cu=0.34V Calculate the standard emf of the cell and the equilibrium constant
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06/12/22

Electrochemistry

A zinc electrode is submerged in an acidic 0.80M Zn+ solution which are connected by salt bridge to a 1.30M Ag+ solution containing a silver electrode. Determine the initial voltage of the cell at... more
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06/12/22

Electrochemistry

What is the potential of a cell made up of Zn/Zn2+ and Cu2+/Cu, half cell at 76°c. If [Zn2+]=0.25M and [Cu2+]=0.15MGiven that Zn/Zn2+ E°=-0.76V, Cu2+/Cu E°=0.34
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06/12/22

Electrochemistry

Predict whether the following reaction would proceed spontaneously as written 298K.Co + Fe2+ -> CO2+ + FeGiven that [Co2+]=0.15M and [Fe2+]=0.68MCo2+ + 2e- ->Co E°=-0.28VFe2+ + 2e- -> Fe ... more
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06/12/22

When a 0.650 g sample of olive oil is burned in a calorimeter, the heat released increases the temperature of 370 g of water from 22.7 ∘C to 38.9 ∘C.

When a 0.650 gg sample of olive oil is burned in a calorimeter, the heat released increases the temperature of 370 gg of water from 22.7 ∘C∘C to 38.9 ∘C∘C.Part AWhat is the energy value of the... more
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06/09/22

 It took 4.5 minutes for 1.0L helium to effuse through a porous barrier. How long will it take for 1.0 L Cl2 gas to effuse under identical conditions
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06/09/22

Most enzyme catalyzed reactions, proceed faster at higher temperatures. But for a given enzyme catalyzed reaction, the rate drops abruptly at a given temperature. Explain this observation
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06/09/22

HELP PLEASEEEE ASAP
consider the reaction and write the letter of the correct answer. a. → b. ←PCl5(g) + heat←→PCl3 (g) + Cl226. Addition of C1227. Increase in pressure28. Removal of heat29. Removal of PCl330.... more
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06/09/22

2.848 mole of A (g) is placed in a 2.00 liter container at 600 °C. The equilibrium constant is 0.441. Find the concentrations of the reactant and both products once equilibrium has been reached.
The equation is 2 A (g) ⇋ B (g) + C (g)
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06/08/22

Calculate the pH of a solution made by mixing 20.0 mL of a 0.100M methanoic acid (CHOOH) with 80.0 mL of a 0.05M sodium methanoate (CHOONa). Ka for methanoic acid 1.78 x 10-4.
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