08/05/22

chemistry qeustion below
A sample of ideal gas is in a sealed container. The pressure of the gas is 585 torrtorr , and the temperature is 8 ∘C∘C . If the temperature changes to 94 ∘C∘C with no change in volume or amount of... more
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08/04/22

calculating half-life
The decomposition of ethylene oxide (CH₂)₂O(g) → CH₄(g) + CO(g) is a first order reaction with a half-life of 58.0 min at 652 K. The activation energy of the reaction is 218 kJ/mol. Calculate the... more
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08/04/22

What is the solubility of La(IO₃)₃ in water? (Ksp of La(IO₃)₃ is 7.5 × 10⁻¹²)
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08/03/22

Calculate the pH when 45.0 mL of 0.200 M HBr is mixed with 30.0 mL of 0.400 M CH₃NH₂ (Kb = 4.4 × 10⁻⁴).
what would you do with the volume and concentrations of the acid and base?
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08/03/22

Calculate the pH when 29.0 mL of 0.150 M KOH is mixed with 20.0 mL of 0.300 M HBrO (Ka = 2.5 × 10⁻⁹)
I ended up with a pH of 12.5 but it still was not correct...
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08/03/22

Pressure Help Please
A sample of gas is held at constant temperature. If the volume of this sample of gas is doubled and the pressure of this sample of gas is doubled, what happens to the number of moles of the gas?
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08/03/22

Pressure Help Please
A sample of gas is held at constant temperature. If the volume of this sample of gas is doubled and the number of moles of this sample of gas is halved, what happens to the pressure of the gas?
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08/03/22

Which equilibrium shows a increase in [products] when the volume increases? I. 2H2(g) + 02(g) => 2H20 (g) II. Ch(g) + PC|3(g) > PC1, (g) Ill. H2(g) + 12 (g) > 2HI (g) IV. 2NH; (g) > N2 + 3H2(g)
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08/01/22

Complete the balanced chemical equation for the following reaction between a weak acid and a strong base. HCN(aq) + Ca(OH)₂(aq) →
what would I do with the Ca and OH?
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08/01/22

Complete the balanced chemical reaction for the following weak base with a strong acid. In this case, write the resulting acid and base as its own species in the reaction. CH₃NH₂(aq) + HClO₃(aq) →??
I am unsure how to balance out the H atoms since the acid should lose an H and become a conjugate base on the product's side, right?
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08/01/22

Calculate the Ksp for hydroxide if the solubility of Pb(OH)2 in pure water is 1.62 × 10-3 g/L.
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07/31/22

How many moles of methane are required to produce 22g co2 after combustion

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07/31/22

A solution is preapared by adding 2g of a substance A to 18g of water calculate the mass per cent of the solute
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07/31/22

Determine ΔG°rxn for the following reaction at 318 K.
FeO(s) + CO(g) → Fe(s) + CO2(g)             ΔH°= -11.0 kJ; ΔS°= -17.4 J/K
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07/30/22

A 120.0 mL sample of 0.20 M HF is titrated with 0.10 M NaOH. Determine the pH of the solution after the addition of 240.0 mL of NaOH. The Ka of HF is 6.8 × 10-4.
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07/30/22

A 450.0 mL sample of 0.20 M HF is titrated with 0.10 M NaOH. Determine the pH of the solution after the addition of 450.0 mL of NaOH. The Ka of HF is 6.8 × 10-4.
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07/29/22

Half life isotope
What is the half-life of an isotope if after 2.00 weeks you have 31.25 g remaining from a 250.0 g starting sample size?
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07/29/22

Phosphorus isotope
 Phosphorus-32 has a half-life of 14.3 days. How many milligrams of phosphorus-32 remain after 71.5 days if you start with 4.00 mg of the isotope
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07/29/22

Anode and cathode half reaction equations
A cell is constructed in which the reactions represented by the following equations is possible:Write the half-reaction that occurs at the cathode and the half-reaction that occurs at the anode
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07/29/22

Standard reaction potentials
 Use the table of Standard Reduction Potentials to calculate the E0cell for a cell made from iodine and bromine.
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07/29/22

use the ideal gas law (pV = nRT) to derive as many gas laws as you can
derive: Boyle's Law, Charles' Law, Gay Lussac's Law, Avogadro's Law and Combined gas Law.
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07/28/22

What is the equilibrium constant K at 25°C for an electrochemical cell when E° = +0.0275 V and n = 2?(F = 96,500 J/(V･mol), R = 8.314 J/(mol･K))
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07/28/22

The rate for the overall reaction:
NO2(g) + CO(g) ---> NO(g) + CO2(g) is Rate = k[NO2]2a) Consider this mechanism:i) 2 NO2(g) ---> N2(g) + 2 O2(g) [slow]ii) 2 CO(g) + O2 ---> 2 CO2(g) [fast]iii) N2(g) + O2(g) ---> 2... more
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07/28/22

For the pair of species given:
a. Lithium (Eº = -3.05 V) and silver (Eº= 0.80 V) b. Cadmium (Eº= -0.40 V) and copper (Eº= +0.34 V)1) Write balance half-reactions and the overall spontaneous reaction.2) Diagram the cell. Be as... more
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07/28/22

Balance the following reactions using the half reaction method:
a) H2O2(aq) + I-1(aq) <---/---> IO3-1(aq) [basic solution]b) S2O32-(aq) + Cl2(l) <---/---> SO42-(aq) + Cl-1(aq) [acidic solution]c) Al(s) + MnO4-1(aq) <---/---> Al(OH)4-1(aq) +... more
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