25,963 Answered Questions for the topic chemistry
Chemistry
05/02/23
Chemistry Homework
A 25.0 mL solution of HNO₃ is neutralized with 18.5 mL of 0.250 M Ba(OH)₂. What is the concentration of the original HNO₃ solution?
Chemistry
05/02/23
Chemistry Homework
A 15.0 mL solution of Sr(OH)₂ is neutralized with 26.9 mL of 0.350 M HCl. What is the concentration of the original Sr(OH)₂ solution?
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Chemistry
05/02/23
What is the concentration of NO3- ions in a solution prepared by dissolving 15.0 g of Ca(NO3)2 in enough water to produce 300. mL of solution?
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Chemistry
05/02/23
Determine the vapor pressure of a solution at 25°C that contains 76.6 g of glucose (C6H12O6) in 250.0 mL of water (Density of water = 1.0g/mL). The vapor pressure of pure water at 25°C is 23.8 torr
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Chemistry
05/02/23
Find equilibrium constant
Consider the following reaction: CH4(g) + 2 H2S(g) --> CS2(g) + 4 H2(g) A reaction mixture initially contains 0.50 M CH4 and 0.75 M H2S. If the equilibrium concentration of H2 is 0.44 M, find...
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Chemistry
05/02/23
Molar mass of compound
An aqueous solution of a soluble compound (a nonelectrolyte) is prepared by dissolving 33.2 g of the compound in sufficient water to form 250 mL of solution. The solution has an osmotic pressure of...
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Chemistry
05/02/23
Missing Kc value
The equilibrium constant is given for two of the reactions below. Determine the value of the missing equilibrium constant.A(g) + 2B(g) --> AB2(g) Kc = 59 AB2(g) + B(g) --> AB3(g) Kc = ? A(g)...
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Chemistry
05/02/23
Find the Kc value
Determine the value of Kc for the following reaction if the equilibrium concentrations are as follows: [P4O10]e q = 2.000 moles, [P4]eq = 3.000 moles, [O2]eq = 4.000 M P4O10(s) P4(s) + 5 O2(g)
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Chemistry Math
05/01/23
A mixture of 3 gases is made of nitrogen (pressure of 905 torr), oxygen (pressure of 450 mm Hg) and argon (pressure of 2.75 atm). What is the total pressure of the mixture in atmospheres?
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Chemistry Math
05/01/23
In a hypothetical reaction, 18.2 L of carbon dioxide is generated in the decomposition of calcium carbonate. What mass of calcium carbonate is decomposed at STP?
CaCO3 (s) ---> CaO (s) + CO2 (g)
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Chemistry
05/01/23
How many milliliters of 0.20 M HCl is required to neutralize 40.0 mL of 0.80 M NaOH?
Chemistry
05/01/23
Calculating Concentration
Given the reaction: 2Al(s) + 3H2SO4(aq) ---> 3H2 + Al2(SO4)3(aq)If aluminum is placed in a 450 mL solution of 1.35 M H2SO4. What mass of aluminum would be needed to completely react?
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Chemistry
05/01/23
For the following cell combination calculate the standard cell potential and write the overall cell reaction: Cd|Cd2+ and Pb|Pb2+
I don't just want the answers. I want to know the steps and how to do it
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Chemistry
05/01/23
If it takes 260 mL of 0.20 M NaOH to neutralize 74 mL of an HCl solution, what is the HCl concentration?
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Chemistry
05/01/23
A 616.1 mL with 1.92 g of nitroglycerin (C3H5N3O9) at 441 °C into CO2 (g), H20 (g), N2 (g), and 02 (g). What is pressure? 4C3H5N3O9 (l) 12 CO2 (g) + 10 H2O (g) + 6 N2 (g) + O2 (g)
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Chemistry
05/01/23
How many mL of 0.58 M sodium hydroxide solution should be required to neutralize 2.5 L of a hydrobromic acid solution that has a concentration of 4.22 mM?
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Chemistry
05/01/23
If it takes 24.58 mL of a 0.022 M sodium hydroxide solution to titrate 145 mL of an unknown solution of phosphoric acid, what is the concentration of the acid solution?
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Chemistry
05/01/23
How many grams of zinc would you start with if you wanted to prepare 4.05 L of H2 at 240 mm Hg and 25.5 ∘C ?
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Chemistry
05/01/23
What is the expected results
The specific heat of copper is 0.385 J/degree Celsius and the specific heat of silver is 0.235 J/g degrees Celsius if the same amount of heat is added to one gram of each metal at 25degree Celsius...
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Chemistry
05/01/23
How do I solve this?
Solid sodium reacts with liquid water to form hydrogen gas according to the equation 2 Na(s) + 2 H₂O(l) → 2 NaOH(aq) + H₂(g) What is the pressure (in atm) of hydrogen gas in the 20.0 L headspace of...
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Chemistry
05/01/23
Compare the gas pressure in a one-liter samples of oxygen, nitrogen, and neon, each with a mass of 2.0 g at 25 °C. Put in descending order.
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Chemistry
05/01/23
A gas mixture was prepared to contain 50% by mass of O₂ and Ne. When the total pressure of the mixture is 1.50 atm, what is the partial pressure of O₂?
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Chemistry
05/01/23
At what pressure does methane (CH₄) have a density of 17.2 g/L at 49.5 °C?
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Chemistry
05/01/23
A gas mixture was prepared to contain 50% by mass of O₂ and Ne. When the total pressure of the mixture is 1.50 atm, what is the partial pressure of O₂?
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