05/10/21

What is the net ionic reaction of iron iii acetate and potassium sulfide
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05/10/21

Dry air is approximately 78% nitrogen, 21% oxygen and 1% argon, by number of molecules. What is the partial pressure of oxygen in a sample of dry air, if atmospheric pressure is 751 torr?
Dry air is approximately 78% nitrogen, 21% oxygen and 1% argon, by number of molecules. What is the partial pressure of oxygen in a sample of dry air, if atmospheric pressure is 751 torr?'SHOW ALL... more
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05/10/21

The piston of an internal combustion engine compresses 538 mL of gas. The final pressure is 15 times greater than the initial pressure.

The piston of an internal combustion engine compresses 538 mL of gas. The final pressure is 15 times greater than the initial pressure. What is the final volume of the gas, assuming constant... more
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05/10/21

help please Determine the rate law, the rate constant, and the overall order for this reaction. chem
Under certain conditions the decomposition of dinitrogen pentoxide ( N2O5 )on a metal surface gives the following data: [N2O5] (M) 1.0  10−3 2.0  10−3 3.0  10−3 Rate (mol... more
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05/10/21

If the Ksp for CaF2 is 5.6 x 10-5 what is the solubility of CaF2?
If the Ksp for CaF2 is 5.6 x 10-5 what is the solubility of CaF2? A. 0.048 M B. 0.024 M C. 2.15x 10-5 M D. 4.30 x 10-5 M
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05/10/21

What is the pH of 0.180 M solution of hydrofluoric acid? (Ka = 6.6 x 10-4)
What is the pH of 0.180 M solution of hydrofluoric acid? (Ka = 6.6 x 10-4) A. 0.745 B. 0.180 C. 0.090 D. 1.96
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05/10/21

help pls If the molar solubility of aluminum hydroxide, Al(OH)3 is 2.6 x 10-9 M, what is the solubility product, Ksp ?
If the molar solubility of aluminum hydroxide, Al(OH)3 is 2.6 x 10-9 M, what is the solubility product, Ksp ?
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05/10/21

Amino acids at different pH
How do I know how amino acids look like using only the Ip and pH-value (without pKa)For example: Draw lysine at pH 9.5 The Ip of lysine is 9.7I feel like I can't do it without the pKas :(
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05/10/21

show all workout for electrochemistry problem
Copy and paste link to view the salt bridge graphhttps://assets.learnosity.com/organisations/154/e2a8974d-1898-4990-ad79-581c1d41eea7.PNGAnswer the following questions regarding the electrochemical... more
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05/10/21

list answer clearly
which of the following gives the relative size of Ka and pH of a 0.10 M solution of HEX3(aq)?HEX3(aq) + H2O(l) ⇌ H3O+(aq) + EX3−(aq)∆Go = +47 kJ/molrxnThe reaction between the acid HEX3(aq) and... more
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05/10/21

Calculating Enthalpy in a Calorimeter Experiment- PLEASE HELP!
When 3g of Ammonium Chloride is added to 10ml of water in a calorimeter, the temperature over a five-minute period drops from 27.1 degrees celsius to 19.8 degrees celsius. The table of the results... more
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05/10/21

2C2H2 + 5O2 -> 4CO2 + 2H2O Identify theoretical yields in grams if 100.0 g of each reactant was used.

2C2H2 + 5O2 -> 4CO2 + 2H2OIdentify theoretical yields in grams if 100.0 g of each reactant was used.
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05/10/21

1 C2H5OH + 3 O2 -> 2 CO2 + 3 H20 Identify theoretical yields in moles if 1.00 mol of each reactant was used.

1 C2H5OH + 3 O2 -> 2 CO2 + 3 H20Identify theoretical yields in moles if 1.00 mol of each reactant was used.
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05/10/21

Hellppppp What volume (L) of 0.432 M NaOH is needed to titrate 50.0 mL of 0.254 M HCl? You must show your work to receive credit.
What volume (L) of 0.432 M NaOH is needed to titrate 50.0 mL of 0.254 M HCl? You must show your work to receive credit.
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05/10/21

How many moles of V205 are consumed to produce 12.0 grams of oxygen?

2V2O5(s) → 4V(s) + 5O2(g)
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05/09/21

What mass of P2O5 is produced from 154 g p?

The equation is: 4P+5O2=2P2O5
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05/09/21

How many moles of O2 are needed to make 71 moles of diphosphorus pentoxide?

The equation is: 4P + 5O2 → 2P2O5
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05/09/21

A mixture of Ne and He, both gases, are held in a container. If the total pressure of the system (the container) is 490 torr, and the pressure of He is 430 torr, what is the pressure of Ne?
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05/09/21

A gas is originally kept in a 15.00 L container at 40° C and 1.67 atm. If the temperature is increased to 70° C and the volume decreased to 7.49 L, what is the new pressure?
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05/09/21

I got c correct me if i'm wrong
Consider the following unbalanced equation: Al4C3 + H2O → Al(OH)3 + CH4 How many moles of Al(OH)3 will be produced when 0.469 mol of CH4 is formed? a. 0.352 mol b. 0.625 mol c. none of these... more
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05/09/21

Please help me with this Chemistry question.

Chemical reactions fall into two classes: redox (electron exchange occurs), and non-electron transfer. Generally speaking, under which category do each of these reactions fall?... more
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05/08/21

If 100.0 grams of each of the following metals absorb the same amount of heat, which metal will show the smallest temperature increase?
Silver = (c = 0.235 J/g°C)Aluminum = (c = 0.897 J/g°C)Lead = (c = 0.129 J/g°C)LeadAluminumSilverThey will all have the same increase in temperature
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05/08/21

ASAP Show all work and calculations
2 AB (g) + B2 (g) → 2AB2 (g); H° = +492.0 kJ/mol, S° = +236.9 J/KmolThe molar mass for AB for part (a) is 149.88Answer the following questions regarding the reaction represented above.(a) Calculate... more
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05/08/21

Q: Which Reaction is more likely to occur: Cl20 + 2F-1 → 2Cl- + F20 F2 + 2Cl-1 → 2F- + Cl20 Why?
Q: Which Reaction is more likely to occur: Cl20 + 2F-1 → 2Cl- + F20 F2 + 2Cl-1 → 2F- + Cl20 Why?
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05/08/21

Which Reaction is more likely to occur: Cu+2 + Al0 → Cu0 + Al+3 Cu0 + Al+3 → Cu+2 + Al0 Why?
Which Reaction is more likely to occur: Cu+2 + Al0 → Cu0 + Al+3 Cu0 + Al+3 → Cu+2 + Al0 Why?
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