11/28/22

Balance the following redox reaction in basic solution.

Complete and balance the following redox reaction in basic solution. Be sure to include the proper phases for all species within the reaction. NO₃⁻(aq) + AsH₃(s) → NH₃(g) + As(s)
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11/28/22

A solution NaOH(aq) contains 8.5 g NaOH(s) per 100.0 mL of solution. Calculate the pH and the pOH of the solution at 25 °C.

ph=pOH=
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11/28/22

In each of the following pairs, which isotope would you expect to be more common in nature? Briefly explain your answer.
In each of the following pairs, which isotope would you expect to be more common in nature? Briefly explain your answer.a. 3919K or 4019Kb. 3013Al or 2713Al
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11/28/22

MnO4- (aq) + S2O42- (aq) → S4O62- (aq) + Mn2+(aq) Balance that acidic solution
MnO4- (aq) + S2O42- (aq) → S4O62- (aq) + Mn2+(aq)Balance that acidic solution
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11/27/22

The radioactive decay of Tl-206 to Pb-206 has a half-life of 4.20 min. Starting with 5.00 x 10^22 atoms of Tl, how many atoms remain after 42.0 min?
The radioactive decay of 206Tl to 206Pb has a half-life of 4.20 min. Starting with 5.00 x 1022 atoms of Tl, how many atoms remain after 42.0 min?
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11/27/22

Given that 𝐾a for HBrO is 2.8×10−9 at 25 °C, what is the value of 𝐾b for BrO− at 25 °C? Kb=
Given that 𝐾b for (CH3)2NH is 5.4×10−4 at 25 °C, what is the value of 𝐾a for (CH3)2NH+2 at 25 °C?Ka=
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11/27/22

What is the pH of a 2.9 M solution of HClO4? PH=
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11/27/22

balanced chemical equation for the reaction, in aqueous solution, between iron(III) acetate and potassium carbonate.
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11/26/22

What is the mass of methane in grams?
The heater used in a 4.41 m×3.45 m×2.99 m dorm room uses the combustion of natural gas (primarily methane gas) to produce the heat required to increase the temperature of the air in the dorm room.... more
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11/26/22

A piece of almunium foil is 8.0x10cm thick what is thickness in micrometrs
10-5
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11/25/22

Titration / Stoichometery
You prepared 0.5 g of KHP to determine the concentration of the NaOH. During titration, you slowly add NaOH to KHP and found out that it requires 16ml of NaOH to change the color of KHP to light... more
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11/25/22

structure of sulphite ion

Explain the structure of sulphite ion
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11/24/22

What volume of 0.410 M KOH is needed to react completely with 23.3 mL of 0.280 M H2SO4 ?
The balanced equation for the neutralization reaction of aqueous H2SO4H2⁢SO4 with aqueous KOHKOH is shown.H2SO4(aq)+2KOH(aq)⟶2H2O(l)+K2SO4(aq)
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11/23/22

Draw Phosphorous trichloride (PCl3) on some scratch paper and answer the following questions:
PCl3 has ______ bonding electronsPCl3 has ______ nonbonding electronsPCl3 has ______ single bonds,______double bonds, and ______ triple bondsPCl3 has ______ electron geometry and ______ molecular... more
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11/23/22

Complete and balance the precipitation reactions. Include physical states. Refer to the solubility rules as necessary.
https://gyazo.com/b89d2e3f6b41ed1d6dc8e4e15359a8b0
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11/23/22

I really need help on this part please :(
5. A student prepared bromobenzene in the Organic lab by reacting 10.0 g of benzene, C6H6, with bromine in the presence of a ferric bromide catalyst according to the reaction of C6H6 (l) + Br2 (l)... more
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11/23/22

What is the HLB of an emulsifier blend consisting of 25 % of Span 20 (HLB 8.6) and 75 % of Tween 20 (HLB 16.7)?
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11/23/22

Using this table of ionization constants, calculate the overall equilibrium constant, 𝐾overallKoverall, for the reaction.
Using this table of ionization constants, calculate the overall equilibrium constant, 𝐾overallKoverall, for the reaction.HF(aq)+S2−(aq)↽−−⇀F−(aq)+HS−(aq)
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11/23/22

How many grams of CaH₂ are needed to generate 66.7 L of H₂ gas at a pressure of 0.995 atm and a temperature of 32°C? The molar mass of CaH₂ is 42.094 g/mol.
Calcium hydride (CaH₂) reacts with water to form hydrogen gas: CaH₂(s) + 2H₂O(l) → Ca(OH)₂(aq) + 2H₂(g)
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11/22/22

Complete and balance the chemical equations for the reactions of group 1 metals. Be sure to include the correct phases of the products.
equation: ___ Li(s)+O2(g)⟶ ___equation: ___. Na(s) + O2(g) -> ___equation ___. Cs(s)+O2(g)->. ___equation: 2Cs(s)+2NH3(l)Note that the (am)(am) phase denotes the solvation of... more
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11/22/22

If 7.99 g of sulfur dioxide reacts with 2.18 g of oxygen, how many grams of sulfur trioxide can form?
Another way that sulfuric acid is formed in the atmosphere is when sulfur dioxide reacts with oxygen in a reaction catalyzed by dust in the atmosphere to form sulfur trioxide. If 7.99 g of sulfur... more
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11/22/22

If the mask contains 0.150 mol KO2 and 0.100 mol water, how many moles of oxygen can be produced? KO2(s) + H2O(ℓ)→ KOH(s) + O2(g)
Potassium superoxide, KO2, is used in re-breathing masks to generate oxygen according to the reaction below. If the mask contains 0.150 mol KO2 and 0.100 mol water, how many moles of oxygen can be... more
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11/22/22

How many molecules of water are produced if 2.0 grams of sodium sulfate are produced in the reaction of sulfuric acid and sodium hydroxide (water is also a product).
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11/22/22

A sample of propane (C3H8) gas was burned with excess oxygen gas. If 4.20 L of CO2 were produced from the reaction of at STP, how many liters of propane were used in the reaction?
A sample of propane (C3H8) gas was burned with excess oxygen gas. If 4.20 L of CO2 were produced from the reaction of at STP, how many liters of propane were used in the reaction?
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11/22/22

If 2.70 L of hydrogen gas reacts completely with excess nitrogen gas by this reaction, how many grams of ammonia are produced? The reaction is carried out at 3.00 atm and 298 K.
Ammonia can be produced from hydrogen and nitrogen gases based on the reactionN2(g) + 3H2(g) à 2NH3(g)If 2.70 L of hydrogen gas reacts completely with excess nitrogen gas by this reaction, how many... more
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