25,963 Answered Questions for the topic chemistry

Chemistry

04/30/23

How much water should be added to 139.2 mL of 18.0 M H2SO4 to prepare a 3.1 M solution?
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Chemistry

04/30/23

Find the Cell potential
For the reaction2Co3+(aq)+2Cl−(aq)→2Co2+(aq)+Cl2(g).  E∘=0.483 Vwhat is the cell potential at 25  if the concentrations are [CO^3+] =0.713M , [CO2^+]=0.444M , [Cl^-]=0.434 M, PCl2=4.50 atm
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Chemistry

04/30/23

Chemistry related

Incandescent carbon particles cause a gas flame to be yellow. To obtain a hotter blue flame you should(A)open the air holes.(B)close the air holes.(C)open the needle valve at the base of the burner... more
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Chemistry

04/30/23

Can I get help on this?
Gallium is produced by the electrolysis of a solution made by dissolving gallium oxide in concentrated NaOH(aq). Calculate the amount of Ga(s) that can be deposited from a Ga(III) solution using a... more
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Chemistry

04/30/23

A current of 3.05 A is passed through a Pb(NO3)2 solution. How long, in hours, would this current have to be applied to plate out 9.10 g of lead?
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Chemistry

04/30/23

Calculate the equilibrium constant, 𝐾, for the reaction shown at 25 °C. Fe3+(aq)+B(s)+6H2O(l)⟶Fe(s)+H3BO3(s)+3H3O+(aq)
The balanced reduction half‑reactions for the equation and their respective standard reduction potential values (𝐸∘) areFe3+(aq)+3e−⟶Fe(s) 𝐸∘=−0.04 VH3BO3(s)+3H3O+(aq)+3e−⟶B(s)+6H2O(l) 𝐸∘=−0.8698 V
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Chemistry

04/30/23

Consider the following reaction and its Δ𝐺∘ at 25.00 °C. 2Ag+(aq)+Cu(s)⟶2Ag(s)+Cu2+(aq)Δ𝐺∘=−88.66 kJ/mol
Calculate the standard cell potential, 𝐸∘cell, for the reaction.𝐸∘cell=V?Calculate the equilibrium constant, 𝐾, for the reaction.𝐾=?
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Chemistry

04/30/23

Colligative Properties

To make something freeze at a higher temperature I would add more solvent?
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Chemistry

04/30/23

Enter the nuclear equation
Enter the nuclear equation for the alpha decay of polonium-216 (216 PO 84
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Chemistry

04/30/23

Use tabulated electrode potentials to calculate ΔG∘ for the following reaction: 2Na(s)+2H2O(l)→H2(g)+2OH−(aq)+2Na+(aq)
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Chemistry

04/30/23

How much water should be added to 125.16 mL of 18.0 M H2SO4 to prepare a 1.27 M solution?
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Chemistry

04/30/23

Colligative Formula
what formula do I use for finding freezing points?
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Chemistry

04/30/23

Boiling Point Chem
0.7 mol of table sugar(C^12H622O^11) is dissolved in 350g of water(Kb=0.51 P H^2O=100.00 How would I find the boiling point?
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Chemistry

04/30/23

Colligative Properties

A solution consists of 0.50 mole of CaCl^2 dissolved in 100 grams of H^20. Compared to the boiling point and freezing point of 100 grams of water at the same pressure the solution has a high or... more
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Chemistry

04/30/23

Colligative Properties

A solution consists of 0.50 mole of CaCl^2 dissolved in 100 grams of H^20. Compared to the boiling point and freezing point of 100 grams of water at the same pressure the solution has a high or... more
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Chemistry

04/30/23

Balance the following redox reaction occurring in basic solution: ClO−(aq)+Cr(OH)4−(aq)→CrO42−(aq)+Cl−(aq)
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Chemistry

04/29/23

Using the data in the table, calculate the rate constant of this reaction. A+B⟶C+D
Using the data in the table, calculate the rate constant of this reaction. (Include Final Units).A+B⟶C+DTrial [𝐀] (𝐌) [𝐁] (𝐌) Rate (M/s)1. 0.250 0.310 ... more
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Chemistry

04/29/23

Chemistry related

What would be the most rapid method of preparing a saturated aqueous solution of KNO, if the solubility is known?(A)Add the calculated amount of solute to the proper amount of water at 20 °C and... more
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Chemistry

04/29/23

Chemistry related

A student determines the mass of an object using a triple beam balance which is sensitive to 0.01 g. When the beam balances, the rider on one beam is in the notch marked 60 g, the rider on another... more
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Chemistry

04/29/23

Chemistry related

Which procedure will lower the activation energy for a particular reaction?(A) subdividing the reactants(B)increasing the reactant concentrations(C) increasing the temperature(D) adding a... more
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Chemistry

04/29/23

CaCO3 + 2 HCl --> CaCl2 + H2O + CO2 How much 0.80 M HCl would be needed to dissolve a CaCO3 pearl which weighs 4.0 grams?
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Chemistry

04/29/23

2 HCl + Zn --> ZnCl2 + H2 When you use 25 ml. of 4.0 M HCl to produce H2 gas, how many grams of zinc does it react with? What volume of H2 gas is produced at STP?
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Chemistry

04/29/23

Chemistry related

Heating zine sulfide in air causes the formation of (A)Zn and S. (B)Zn and SO2(C)ZnO and S(D)ZnO and SO2(E)Zn and SO3could you explain why you got that answer?
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Chemistry

04/29/23

Chemistry related

The electrical conductance of a solution of Ba(OH)2 slowly decreases upon the addition of HSO4 to a minimum, and then slowly increases. The best experimental evidence for this is(A)The Ba(OH)... more
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Chemistry

04/29/23

Chemistry related

Which instrument is used to measure the gain or loss of heat?(A)manometer(B)hydrometer(C)calorimeter(D) barometer(E)voltmetercould you explain why you got that answer
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