06/24/22

Light relationships

What is the wavelength in nanometers of photons with an energy of 69.0 kJ/mol? in nm
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06/24/22

Light relationships
What is the energy of 1.62 x 10–3 moles of 4.77 nm X-ray photons?  in kJ
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06/23/22

how to calculate the ph of this solution [OH-]=5x10-2M
pls provide all steps so I can learn thank you
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06/23/22

calculate the molarity of acetic acid soution if 25.2ml of an HC2H3O2 solution is titrated with 28.6 mL of a 0.164 M KOH solution
equation is HC2H3)2(aq)+KOH(aq) arrow to rt H2O(l) +KC2H3O2(aq)Can you please provide step by step... I need to learn how to do this....Thank you
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06/23/22

balance the molecular equqtion for the neutralization of H3PO4(aq)and KOH(aq) including phases
pls provide basic steps so I can learn and thank you
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06/23/22

enter balanced molecular equation of neutralization including all chemical phases for HNO3 (aq) and CA(OH)2(s)
please be practical i need to learn and thank you
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06/22/22

Solve for the following problems. Write the given and solution.
8. Write the noble gas electron configuration of Bismuth then determine the principal, azimuthal, magnetic, and spin quantum numbers. 9. Write the noble gas electron configuration of Tin then... more
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06/22/22

Solve for the following problems. Write the given and solution.
6. Write the expanded electron configuration of Astatine then determine the principal, azimuthal, magnetic, and spin quantum numbers. 7. Write the expanded electron configuration of Nihonium then... more
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06/22/22

Solve for the following problem. Write the given and solution.
5. A 3.5 L sample at 20o C and 750 atm contains 0.5 moles of a gas. If 0.1 mole of the gas at the same temperature and pressure is added to the sample, what is the new volume of the gas?
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06/22/22

Solve for the following problem. Write the given and solution.
4. A scuba tank is filled with air at 16.7 atm and 24o C, but someone leaves it out in the sun to warm to 65o C. What is the new pressure in the tank?
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06/22/22

Solve for the following problem. Write the given and solution.
2. At 2.02 atm and 17oC, a constant pressure tank has 255 L of propane. What is the Volume of the gas at 49oC? 3. A given mass of Hydrogen occupies 20 L at 0.79 atm. What volume will it occupy at... more
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06/22/22

Solve for the following problems. Write the given and solution.
1. A mixture of N2 and H2 gases to be used for ammonia production exerts a pressure of 4.0 atm. If the mole fraction of N2 in the mixture is 0.55, what is the individual pressure of H2 in the... more
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06/22/22

Enthalpy - Chemistry

Calculate ΔHo for the process Co3O4(s) → 3 Co(s) + 2 O2(g)from the following information Co(s) + ½ O2(g) → CoO(s)  ΔHo = -108.1 kJ/mol 3 CoO(s) + ½ O2(g) → Co3O4(s)  ΔHo = -265.3 kJ/mol
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06/22/22

Enthalpy - Chemistry

The combustion of propane is given by the following reaction.C3H8 + 3 O2 → 3 CO2 + 4 H2OThe enthalpy of reaction is −2202.0 kJ/mol. How much energy (in joules) will be released if 43.11 grams of... more
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06/21/22

Hi can anyone show me the solution of this please
Consider the following reaction which has a Kc = 25.0 at 1100 K. H2 (g) + I2 (g) ↔ 2 HI (g)1.50 mol H2 and 3.00 mol I2 are placed in a 2.00 L reaction vessel at 1100 K. What is the equilibrium... more
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06/21/22

Hi can anyone show me the solution of this please
The [OH-] of a 0.290 M weak base is 1.25 x 10^ -2 M. Calculate Kb.
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06/21/22

Hi can anyone show me the solution of this please
Determine the Ksp of lead (II) chloride (PbCl2), if its molar solubility is 1.95 x 10^-3 M
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06/20/22

Chemistry Conversion Question
When doing metric/unit conversions, how do you know when it is supposed to be multiple steps? For example one of my homework questions asks how many centimeters are in 8 nanometers. I have to go... more
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06/20/22

Enthalpy - Chemistry

Calculate ΔHo for the process Zn(s) + S(s) + 2 O2(g) → ZnSO4(s)from the following information Zn(s) + S(s) → ZnS(s).  ΔHo = -158.9 kJ/mol ZnS(s) + 2 O2(g) → ZnSO4(s)  ΔHo = -247.4 kJ/mol
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06/20/22

Calorimetry - Chemistry

A 25.00 gram sample of an unknown metal initially at 99.0 degrees Celcius is added to 50.00 grams of water initially at 7.16 degrees Celcius. The final temperature of the system is 20.15 degrees... more
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06/20/22

Calorimetry - Chemistry
You order a 16 oz glass of tea (where the mass of Tea is 474 grams) from a local restaurant. The tea is freshly brewed and has an initial temperature of 22.84 °C. You add ice to cool it. If the... more
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06/20/22

General Chemistry 2
Calculate the concentration of HS- in an aqueous solution of 0.0632 M hydrosulfuric acid, H2S (aq).
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06/20/22

General Chemistry 2
The pH of an aqueous solution of 0.1890 M carbonic acid, H2CO3 (aq), is
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06/20/22

Calorimetry - Chemistry

Calculate the internal energy (in Joules) of a system that loses 340.8 J that is compressed with a pressure of 2.13 atm from 4.930 L to 1.00 L.
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06/20/22

Calorimetry - Chemistry

A 58.78 gram sample of iron (with a heat capacity of 0.450 J/gºC) is heated to 100.0 ºC. It is then transferred to a coffee cup calorimeter containing 33.63 g of water (specific heat of... more
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