251 Answered Questions for the topic chemical engineering

05/05/21

HELP Chemistry. energy required to heat
At 1 atm, how much energy is required to heat 53.0 g H2O(s) at −22.0 ∘C to H2O(g) at 119.0 ∘C? In KJ.
Follows • 2
Expert Answers •1

05/05/21

Vapor pressure of a certain liquid
A certain liquid has a vapor pressure of 92.0 Torr at 23.0 ∘C and 206.0 Torr at 45.0 ∘C.a. Calculate the value of delta H vap for this liquid.b. Calculate the normal boiling point of this liquid.
Follows • 2
Expert Answers •1

05/03/21

Vapor pressure of a certain substance
A certain substance has a heat of vaporization of 33.31 kJ/mol. At what Kelvin temperature will the vapor pressure be 4.50 times higher than it was at 291 K?
Follows • 2
Expert Answers •1

05/01/21

Vapor Pressure of a certain liquid
A certain liquid has a vapor pressure of 92.0 Torr at 23.0 ∘C and 206.0 Torr at 45.0 ∘C.a. Calculate the value of delta H vap for this liquid.b. Calculate the normal boiling point of... more
Follows • 2
Expert Answers •1

05/01/21

Energy required to heat water
At 1 atm, how much energy is required to heat 53.0 g H2O(s) at −22.0 ∘C to H2O(g) at 119.0 ∘C? In KJ.
Follows • 1
Expert Answers •1
Chemical Engineering Science Chemistry Biochemistry

05/01/21

Methane reacts with oxygen according to the following equation. CH2(g) + 2O2(g)   ------->  CO2(g) + 2H2O(l)
Methane reacts with oxygen according to the following equation.CH2(g) + 2O2(g)   ------->      CO2(g) + 2H2O(l)The ff data were obtained from an experiment. Time (min) [CH4] (mol L-1) [CO2]... more
Follows • 2
Expert Answers •1
Chemical Engineering Chemistry Organic Chemistry Chem

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... more
Follows • 2
Expert Answers •1

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... more
Follows • 1
Expert Answers •1
Chemical Engineering

04/23/21

Q No.9: IF you enter in your kitchen and smell the leakage of gas How would you respond Explain?

Follows • 1
Expert Answers •1
Chemical Engineering Science Chemistry Biochemistry

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 25​o​C.How much gas is in the container?b.If the mass of the gas in the container is 40.5 g, what is the... more
Follows • 1
Expert Answers •1
Chemical Engineering Science Chemistry Physics

04/13/21

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?
Follows • 1
Expert Answers •1
Chemical Engineering Mechanical Engineering Thermodynamics

04/12/21

Thermodynamics- Combustion -Conservation of Energy
I was able to figure problem one, but I need help with problem 2. Thank you for the help!Problem #1: Ethane (C2H6) gas at mass flow rate of 1.5 kg/min is mixed with air (O2 + 3.76N2) at mass flow... more
Follows • 2
Expert Answers •1

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... more
Follows • 2
Expert Answers •1

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... more
Follows • 1
Expert Answers •1

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... more
Follows • 1
Expert Answers •1
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?
Follows • 2
Expert Answers •1
Chemical Engineering Math Science Biology

04/05/21

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) +... more
Follows • 2
Expert Answers •1
Chemical Engineering Math Science Biology

04/04/21

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... more
Follows • 2
Expert Answers •1
Chemical Engineering Math Science Chemistry

03/13/21

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.
Follows • 2
Expert Answers •1
Chemical Engineering Chemistry Physics Biochemistry

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... more
Follows • 1
Expert Answers •1

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?
Follows • 1
Expert Answers •1
Chemical Engineering Chemistry Organic Chemistry Chem

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.... more
Follows • 1
Expert Answers •1
Chemical Engineering Chemistry Organic Chemistry Chem

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)
Follows • 3
Expert Answers •1
Chemical Engineering Math Algebra 1 Algebra 2

02/09/21

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... more
Follows • 1
Expert Answers •1
Chemical Engineering Math Algebra 1 Algebra 2

02/09/21

How many zinc atoms are contained in 354 g of zinc?
How many zinc atoms are contained in 354 g of zinc?!
Follows • 2
Expert Answers •1

Still looking for help? Get the right answer, fast.

Ask a question for free

Get a free answer to a quick problem.
Most questions answered within 4 hours.

OR

Find an Online Tutor Now

Choose an expert and meet online. No packages or subscriptions, pay only for the time you need.