03/11/21

Chemistry help please? Calculate the enthalpy change for the reaction: C6H4(OH)2(aq) + H2O2(aq) <—>C6H4O2(aq) + 2H2O(l)?
Calculate the enthalpy change for the reaction: C6H4(OH)2(aq) + H2O2(aq) <—> C6H4O2(aq) + 2H2O(l)given the following data:C6H4(OH)2(aq)-->C6H4O2(aq)+H2(g) H= +174.4 kJH2O(g)-->H2O(l) H=... more
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03/11/21

Given: Ar P1: 3.5107 atm P2: 4.7902 atm V1: 63.805 L T1: 287.32 K T2: 512.3 K Wanted: liters of Ar?
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03/10/21

CHEMISTRY QUESTION
A sample of gas in a flexible container is heated from 293 K to 552 K while the pressure remains constant. If the starting volume is 47 L, what is the volume after heating?
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03/10/21

CHEMISTRY QUESTION
If a sample of gas has a temperature of 43.1oC, what is the temperature in Kelvin?
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03/06/21

I need help with Chemistry

Methane (CH4) is a highly flammable gas that can combust according to the equation below: CH4 (g) + 2 O2 (g) → 2 H2O (g) + CO2 (g)a.)Given the standard heats of formation (ΔHof) in the table below,... more
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03/06/21

Acid or Base reaction
Determine if the following salt is neutral, acidic or basic. If acidic or basic, write the appropriate equilibrium equation for the acid or base that exists when the salt is dissolved in aqueous... more
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03/06/21

Need help with this question
What is the molarity of a solution consisting of 324 g of Yb2(SO4)3 in 2.50 L of solution
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03/06/21

Calculate the molarity of each ion present in each of the following solutions. 0.0020 Ca(OH)2 0.103 M Na3PO4
Calculate the molarity of each ion present in each of the following solutions.0.0020 Ca(OH)20.103 M Na3PO4
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03/06/21

Calculate the molarity of each ion present in each of the following solutions. 0.25 M AlCl3 0.375 M Na2CrO4
Calculate the molarity of each ion present in each of the following solutions.0.25 M AlCl30.375 M Na2CrO4
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03/06/21

If 3.2 grams of aluminum reacts with 5.4 grams of chlorine gas to produce solid aluminum chloride
What mass of aluminum chloride will be produced? Which reactant is the limiting reactant? Which reactant is the excess reactant?
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03/06/21

In the reaction N2(g) + 3 H2 (g) → 2 NH3 (g), how much ammonia would be produced from 1.0 mol of hydrogen and excess nitrogen? 1. 0.67 mol 2. 3.0 mol 3. 2.0 mol 4. 0.33 mol 5. 1.3 mol
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03/06/21

How many milliliters of 1.50 M H2SO4 are needed to neutralize 50.0 g of NaOH?
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03/06/21

What mass of CO would occupy a volume of 35.6 L at STP?
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03/05/21

Can somebody help me with my chemistry homework? I'm seriously confused
The problem is: The Ostwald process for manufacturing nitric acid involves the following reaction:4NH3 + 5O2 = 4NO + 6H2OAssume that 310 g of O2 will react with 175 g of NH3. a. Determine the... more
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03/05/21

college chemistry 1
If a plant produces 3.46mol C6H12O6 how many moles of H2O are needed?
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03/05/21

The solubility of Ce(IO3) in a 0.20 M solution of KIO3 is 4.4 x10-8 M. Calculate the Ksp for Ce(IO3)3.
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03/05/21

2.0 mol of propane, C3H8, reacts with 8.0 mol of oxygen gas in a combustion reaction producing carbon dioxide and water. Calculate the theoretical yield of carbon dioxide.
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03/05/21

Sorry for asking for more help :(
How many liters of 3.87 M sulfuric acid are required to fully neutralize 698.5 mL of 8.16 M lithium hydroxide?Sorry I keep asking for help, but no matter how I do the problems or work them out I... more
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03/05/21

I keep getting this wrong. In a collision of sufficient force, automobile air bags respond by electrically triggering the explosive decomposition of sodium azide (NaN3) to its elements....
A 33.4−g sample of sodium azide was decomposed, and the nitrogen gas generated was collected over water at 26°C. The total pressure was 757.0 mmHg. How many liters of dry N2 were generated? Do not... more
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03/05/21

you need to prepare a 4 M concentrated solution for a lab and only need 500 mL of total solution. If you use enough water to bring the volume to 500 mL how many grams of sodium’s chloride would you
need to dissolve in the solution?
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03/05/21

Redox reactions

CH2O + Ag2O + OH- → 2Ag + HCO2-+ H2O—how many grams of Ag are formed if 2.32 grams of Ag2O are used—If 0.98 grams of Ag are formed what is the yield of the reaction
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03/05/21

What is the percent yield if 1.77 g of Ca(OH)₂ reacts with excess HCl to produce 2.50 g of CaCl₂?
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03/04/21

chem help please

In a titration, 485.6 mL of a 3.68 M solution of hydrochloric acid is neutralized by with 0.349 L of magnesium hydroxide. What is the molarity of the base?
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03/04/21

chem hw question

The rate constant for this first-order reaction is 0.0292 s−1 at 300 °C.A⟶productsIf the initial mass of A is 18.06 g, calculate the mass of A remaining after 1.20 min.
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03/04/21

homework question
A reactant decomposes with a half-life of 185 s when its initial concentration is 0.118 M. When the initial concentration is 0.799 M, this same reactant decomposes with the same half-life of 185 s.... more
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