03/10/20

What is the pH of 0.22 M trimethylammonium chloride
What is the pH of 0.22 M trimethylammonium chloride, (CH3)3NHCl? Enter your answer with two decimal places.The Kb of trimethylamine, (CH3)3N, is 6.3 x 10-5.Answer is 5.23
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03/09/20

Chemistry Question
I have some questions about the below:Given the The Compound C6H10N4O2, calculate percent composition using the atomic masses: Hydrogen = 1.008, Carbon = 12.011, Oxygen = 15.999, and Nitrogen =... more
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03/09/20

Of the following gases which is the smallest/lowest rate of effusions at a given temperature?

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03/09/20

If a 3.6 small of an idea gas occupies 150 mL tank at a temperature of -5°C what is the pressure inside the tank
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03/08/20

The pain killer morphine is a weak base when added to water. The Kb is 1.6 × 10–6. What is the pH of a 4.44 × 10–3 M solution of morphine?
The pain killer morphine is a weak base when added to water. The Kb is 1.6 × 10–6. What is the pH of a 4.44 × 10–3 M solution of morphine?
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03/08/20

What is the pH after 0.022 mol of HCl are added to 0.53 L of the solution?
A buffer that contains 0.11 M of an acid, HA and 0.49 M of its conjugate base A-, has a pH of 4.24. What is the pH after 0.022 mol of HCl are added to 0.53 L of the solution?
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03/08/20

calculate the pH for this buffer.
A buffer consists of 0.13 M Na2HPO4 and 0.31 M Na3PO4. Given that the K values for H3PO4 are, Ka1 = 7.2 x 10-3, Ka2 = 6.3 x 10-8, and Ka3 = 4.2 x 10-13, calculate the pH for this buffer.
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03/08/20

Calculate the pOH of a solution

Calculate the pOH of a solution that is 0.183 M NH2NH2 and 0.513 M NH2NH3Cl. Kb of NH2NH2 is 1.7 x 10-6.
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03/08/20

How many grams of the solid can be formed from 206 g of calcium nitrate and 148 g of phosphoric acid? Answer in units of g.
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03/08/20

Finding partial pressure at equilibrium?
One method for producing hydrogen is to react coke (mostly solid carbon) with steam to make syngas, a mixture of CO and hydrogenC(s) + H2O(g) ⇌ CO(g) + H2(g)     Kp = 0.45 at 900 K     ΔH = +131... more
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03/08/20

Finding moles of a specific product at equilibrium constant?
For the reaction:2H2O(g) ⇌ 2H2(g) + O2(g)KC = 2.40 x 10-3 at a given temperature.At equilibrium, it is found that [H2O] = 0.205 M and [H2] = 1.20 x 10-2 M.If the reaction is run in a 7.00 L... more
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03/08/20

Calorimetry part 8
A 52.19 mL sample of 3.02 M CuSO4 reacts with 54.48 mL of 2.87 M KOH in a coffee cup calorimeter to form Cu(OH)2(s) and K2SO4 (aq). The initial temperature is 18.5°C and the final temperature is... more
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03/08/20

Calorimetry part 7
A 52.19 mL sample of 3.02 M CuSO4 reacts with 54.48 mL of 2.87 M KOH in a coffee cup calorimeter to form Cu(OH)2(s) and K2SO4 (aq). The initial temperature is 18.5°C and the final temperature is... more
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03/08/20

Calorimetry part 6
A 52.19 mL sample of 3.02 M CuSO4 reacts with 54.48 mL of 2.87 M KOH in a coffee cup calorimeter to form Cu(OH)2(s) and K2SO4 (aq). The initial temperature is 18.5°C and the final temperature is... more
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03/08/20

Calorimetry part 5
A 52.19 mL sample of 3.02 M CuSO4 reacts with 54.48 mL of 2.87 M KOH in a coffee cup calorimeter to form Cu(OH)2(s) and K2SO4 (aq). The initial temperature is 18.5°C and the final temperature is... more
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03/08/20

Calorimetry part 4
A 52.19 mL sample of 3.02 M CuSO4 reacts with 54.48 mL of 2.87 M KOH in a coffee cup calorimeter to form Cu(OH)2(s) and K2SO4 (aq). The initial temperature is 18.5°C and the final temperature is... more
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03/08/20

Calorimetry part 3
A 52.19 mL sample of 3.02 M CuSO4 reacts with 54.48 mL of 2.87 M KOH in a coffee cup calorimeter to form Cu(OH)2(s) and K2SO4 (aq). The initial temperature is 18.5°C and the final temperature is... more
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03/08/20

calorimetry homework help 2
A 52.19 mL sample of 3.02 M CuSO4 reacts with 54.48 mL of 2.87 M KOH in a coffee cup calorimeter to form Cu(OH)2(s) and K2SO4 (aq). The initial temperature is 18.5°C and the final temperature is... more
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03/08/20

calorimetry homework
A 52.19 mL sample of 3.02 M CuSO4 reacts with 54.48 mL of 2.87 M KOH in a coffee cup calorimeter to form Cu(OH)2(s) and K2SO4 (aq). The initial temperature is 18.5°C and the final temperature is... more
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03/08/20

Calorimetry help please
A 52.19 mL sample of 3.02 M CuSO4 reacts with 54.48 mL of 2.87 M KOH in a coffee cup calorimeter to form Cu(OH)2(s) and K2SO4 (aq). The initial temperature is 18.5°C and the final temperature is... more
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03/08/20

In a 100ml dye bath with a concentration of 5x10to the -5 mol/L how many grams of dye are in that bath ( the molar weight of the dye is 808.9 G/mol
How many grams of dye are in a 100 ml dye bath with a 5x10-5 concentration ?
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03/06/20

how many grams of water can be obrained from 73.324 grams of MgSO4 7H2O
how many grams of water can be obtained from 75.324 grams of MgSO4 7H2Ohow many grams of water can be obtained from 73.324 grams of MgSO4 7H2O
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03/06/20

Chemistry calculation problems
10,0 cm^3 0,1 mol/l solutions of HCl and CH3COOH are given What amount x cm^3, x mol/l NaOH is necessary to neutralize both solutions 10,0 cm^3 0,001 mol/l HCl was diluted to 1 l. Find the pH of... more
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03/06/20

Please help with chemistry homework
Given the thermochemical equationsX2+3Y2⟶2XY3ΔH1=−320 kJX2+2Z2⟶2XZ2ΔH2=−170 kJ2Y2+Z2⟶2Y2ZΔH3=−290 kJCalculate the change in enthalpy for the reaction.4XY3+7Z2⟶6Y2Z+4XZ2
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03/06/20

For a particular isomer of C 8 H 18 , the combustion reaction produces 5093.7 kJ of heat per mole of C 8 H 18 ( g ) consumed, under standard conditions.
C8H18(g)+252O2(g)⟶8CO2(g)+9H2O(g)ΔH∘rxn=−5093.7 kJ/molWhat is the standard enthalpy of formation of this isomer of C8H18(g)?
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