192 Answered Questions for the topic chemical engineering

04/27/21

#### The acid-dissociation constants of HC3H5O3 (aq) and CH3NH3+ (aq) are given in the table above. Which of the following mixtures is a buffer with a pH of approximately 10.5?

Given:HC3H5O3--> Ka: 8.3*10^-4CH3NH3+---> Ka: 2.3*10^-11 The acid-dissociation constants of HC3H5O3 (aq) and CH3NH3+ (aq) are given in the table above. Which of the following mixtures is a...
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04/25/21

#### Show all workout and answer all parts ( Im just reviewing for AP exams so its not graded, but I want it to help me.

Show all workout and answer all parts ( Im just reviewing for AP exams so its not graded, but I want it to help me.A new weak acid, HG, has been synthesized. The a titration of 0.115g of...
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04/13/21

#### HELP! I need help solving these chemistry questions before midnight! Please and thank you!

a.A sealed container of an unknown gas has a volume of 2.5 L and a pressure of 5 atm at 25oC.How much gas is in the container?b.If the mass of the gas in the container is 40.5 g, what is the...
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#### I need help before midnight! Please and thank you!

What mass of chlorine gas is contained in a 10.0 L container at 27°C and 3.50 atm of pressure?

04/12/21

#### In the above equation how many moles of water can be made when 180.7 grams of HNO3 are consumed?

S + 6 HNO3 --> H2SO4 + 6 NO2 + 2 H2OIn the above equation how many moles of water can be made when 180.7 grams of HNO3 are consumed?Round your answer to the nearest tenth. If you...
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04/12/21

#### (Chemistry) Mass-to-Mole Conversion

For the reaction C + 2H2 → CH4, how many moles of hydrogen are needed to make 152.5 grams of methane, CH4 ?Round your answer to the nearest tenth. If you answer is a whole number like 4, report the...
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04/12/21

#### In the above equation how many moles of N2 can be made when 188.7 grams of CuO are consumed?

2 NH3 + 3 CuO --> 3 Cu + N2 + 3 H2OIn the above equation how many moles of N2 can be made when 188.7 grams of CuO are consumed?Round your answer to the nearest tenth. If you answer is a...
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Chemical Engineering Chemistry

04/10/21

#### dissolved oxygen

What is the solubility of oxygen in water in contact with air when the atmospheric pressure is 0.88 atm, the temperature is 16oC, and the chloride concentration is 1000 mg/L?

#### Calculate enthalpy change

Given the following two reactions:(1)Pb(s) + Cl2(g)PbCl2(s) H(1) = -359.4 kJ(2)Mg(s) + Cl2(g)MgCl2(s) H(2) = -641.3 kJcalculate the enthalpy change for the following reaction:(3) Pb(s) +...
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#### Calculate enthalpy

The following reaction is exothermic. N2(g)+H2(g)+3O2(g)=2HNO3(g) deltaH(1)=-270kjcalculate the enthalpy change for the reaction of the elements to form one mole of HNO3(g). 1/2N2(g)+1/2H2(g)+3/2...
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#### SOS! Please help with rate law problem!

Step 1 : A + B → C + E (slow) Step 2 : B + E → D (fast)Predict the rate law if step 1 is slow.

03/03/21

#### What kinetic energy, 𝐸k , must the electrons have in order to resolve a protein molecule

To resolve an object in an electron microscope, the wavelength of the electrons must be close to the diameter of the object. What kinetic energy ,𝐸k, must the electrons have in order to resolve a...
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03/03/21

#### Maximum mass of an object

Assuming that the smallest measurable wavelength in an experiment is 0.430 fm, what is the maximum mass of an object traveling at 913 m⋅s−1 for which the de Broglie wavelength is observable?

02/23/21

#### Concentration of sulfuric acid and balanced equation

Write the balanced neutralization reaction that occurs between H2SO4 and in KOH aqueous solution. Phases are optional.Suppose 0.250 L of 0.500 M of H2SO4 is mixed with 0.200 L of 0.240 M KOH....
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02/23/21

#### Net ionic equation

Write the net ionic equation for the chemical reaction shown. Include physical states.HClO2(aq)+NaOH(aq)⟶H2O(l)+NaClO2(aq)

#### Which of the following statements is TRUE?

The different isotopes of an element are always equally abundant. Atoms of different elements may have the same mass numbers. The identify of an atom cannot be determined solely by its atomic...
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#### How many zinc atoms are contained in 354 g of zinc?

How many zinc atoms are contained in 354 g of zinc?!

Chemical Engineering

02/08/21

#### If gold is selling presently for $1000.00/oz how much would 1 cubic inch of gold be worth?

Given: 1 inch= 2.54 cm; 1 oz: 28.3 g. Density of gold: 19.5 g/cm^3

01/29/21

#### How do I find the analytical solution to this differential equation and then plot H vs t?

(v12)/2g * (1 - 1/B4) = - (H + L)wherev1 = - dH/dt and H(to) = Ho

Chemical Engineering Physics

01/26/21

#### Please show all your work and step. Please write clear

Earth = 9.8 meters per second squared [m/s^2]
Earth's moon = 1.6 meters per second squared [m/s^2]
Mars = 3.7 meters per second squared [m/s^2]
A space probe is built with a mass of 1597...
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01/24/21

#### What happens when co2 is heated

01/20/21

#### PLEASE HELP ME OUT ASAP !

Calculate the pCl of the mixture of 100.0 mL of 0,0500 M NaCl with 40.0 mL 0.100 M AgNO3 . Take account of the precipitate occurs when the solutions are mixed. PLEASE WRITE THE SOLUTION WITH FULL...
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12/23/20

#### General Chemistry

1. Draw cell diagrams of galvanic cells one of which Zn is the anode, the other − the cathode. Write the electrode reactions. Calculate E0cell. 2. Calculate the cell potential of Mg/Nigalvanic cell...
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Chemical Engineering Chemistry

12/14/20

#### Analyse the technical problems and design factors in the manufacture of oxygen and nitrogen

Please give a detailed analysis in about 400 words.

11/22/20

#### please help on this questions

1.At what temperature was thermal equilibrium reached? How long did it take to arrive at this temperature?2.How does the temperature change within the first 60 seconds of the experiment? Within the...
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