02/07/23

How many moles of KCl can be produced by letting 2.5 moles of KClO3 react?
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02/07/23

How many moles of O2 can be produced by letting 8.00 moles of KClO3 react?
Need help with this one im stuck on what too do.
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02/07/23

What is the mass concentration (in g/L) when 1.379 L of salty water contains 4.32 g of NaCl?
please answer this question
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02/07/23

Find K for ΔG° of -5.2 kJ/mol at 25°C
Given a ΔG° of -5.2 kJ/mol at 25°C, calculate the corresponding K. [R = 8.314 J/K∙ mol]
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02/07/23

Chemistry redox reaction
Calculate the E^o cell  for the redox reaction shown below in volts:2Li(s)+Mg+2(aq)→2Li+1(aq)+Mg(s)2Eocell=Eocathode+Eoanode
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02/07/23

A roll of aluminum foil has a mass of 1.07 kg. What is its mass in pounds?
Required to show work mathematically.
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02/06/23

What would be the osmotic pressure (in atm) of this solution at 40.0 °C? Assume the density of the solution is the same as benzene, 0.877 g/mL.
0.0711 kg of biphenyl (C₁₂H₁₀) is dissolve in benzene (C₆H₆) to create a solution with a total volume of 350.0 mL. (Assume the change in volume is negligible) What would be the osmotic pressure (in... more
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02/06/23

If the vapor pressure of pure benzene is 24.4 kPa at 40.0 °C, then what will the vapor pressure of the solution be in kPa?

0.0711 kg of biphenyl (C₁₂H₁₀) is dissolve in benzene (C₆H₆) to create a solution with a total volume of 350.0 mL. (Assume the change in volume is negligible) If the vapor pressure of pure benzene... more
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02/06/23

what would be the boiling point of this solution in °C? (Kb for benzene is 2.53 °C/m and the density of benzene is 0.877 g/mL)
0.0711 kg of biphenyl (C₁₂H₁₀) is dissolve in benzene (C₆H₆) to create a solution with a total volume of 350.0 mL. (Assume the change in volume is negligible) If the boiling point of pure benzene... more
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02/06/23

What is the molality of a solution prepared with 92.2 g of ethyl propanoate and 579.6 mL of acetone? The density of acetone is 0.784 g/mL.
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02/06/23

general chemistry

What mass of water is produced from the complete combustion of 7.50×10−3 gg of methane?
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02/06/23

need help with chem question please
"Determine the vapor pressure and the vapor pressure lowering of a solution made from 460.0mL of water and 218.2g of the solute, glucose (molar mass = 180.157g•mol-1), at a temperature of... more
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02/06/23

Chemistry question
"Determine the mass of a 1.15L aqueous solution of sucrose (C12H22O11) that is isotonic with seawater given the average osmotic pressure of seawater is 30.0 atm at 25°C."
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02/06/23

At 25 °C and 775 Torr, carbon dioxide has a solubility of 0.0347 M in water. What is its solubility at 25 °C and 1350 Torr?
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02/06/23

A mixture of 0.5830 M CO and 0.3080 M Cl2 is enclosed in a vessel and heated to 1000 K CO(g)+Cl2(g)↽ ⇀COCl2(g)𝐾c=255.0 at 1000 K Calculate the equilibrium concentration of each gas at 1000 K

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02/06/23

At a certain temperature, 0.680 mol of SO3 is placed in a 5.00 L container. 2SO3(g)↽−−⇀2SO2(g)+O2(g) At equilibrium, 0.0200 M O2 is present. Calculate 𝐾c.
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02/06/23

Freezing point depression (mass of additive)

Ethylene glycol (C₂H₆O₂) is used as an additive to the water in your automobile to lower its freezing point. A solution of ethylene glycol in water has a freezing point of -4.60 °C. What mass (in... more
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02/06/23

buffer solution is comprised of 0.10 M NH3 and 0.10 M NHCI. A small volume of NaOH is added to the solution. Select all the spectator ions.
A) H30+b.) Cl-C.)NH4^+D.) Na^+
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02/06/23

Select the statement that best describes a solution containing 0.10 M NH3 and 0.20 M NH4CI?
A) The solution will have a greater buffer capacity for added acid than added base.B.) The solution will have a greater buffer capacity for added base than added acid.C.) The solution will not... more
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02/06/23

The 𝐾sp of strontium carbonate, SrCO3, is 5.60×10−10 . Calculate the concentration of strontium ions in a saturated solution of SrCO3.
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02/05/23

Earth (mass = 6.0 x 10^27 g) moving through space at 3.5 x 10^4 M/S
Need help
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02/04/23

For the reaction 2HNO3 + Mg(OH)2 → Mg(NO3) 2 + 2H2O, how many grams of magnesium nitrate are produced from 4 grams of nitric acid, HNO3 ?
Round your answer to the nearest tenth. Do not round your answers until the last step of the problem. If you do, the computer might mark your answer incorrect and you will be asked to complete your... more
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02/04/23

Buffer solution

Calculate the buffer range of these buffer solutions: (a) NH4Cl-NH3; pK (NH)=4.75 (b) KH2PO-Na₂HPO4; pKa1(H3PO4)=2.16, pK 2(H3PO4)=7.21, PK (H3PO4)=12.32 (c) Na₂HPO-Na3PO4
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02/04/23

Buffer solution
What mass of sodium acetate must be added to 2.50 L of 0.55 M acetic acid to make a buffer solution with pH = 5.75? pK (HAC)=4.75, molar mass of NaAc is 82 g/mol (Ignore volume change after solid... more
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02/04/23

The element chlorine has two naturally occurring isotopes. The isotopic masses and abundances of these isotopes are shown in the table.
IsotopeIsotopic mass (u)Abundance (%) Cl35 34.97 75.77 Cl37 36.97 24.23 Calculate the average atomic mass of chlorine to two digits after the decimal point.average atomic mass:
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