183 Answered Questions for the topic chemical engineering

Chemical Engineering

12/23/22

thermodynamics mcq

A gas undergoes an isobaric expansion, meaning that the pressure remains constant during the process. The initial volume of the gas is 10 L, the final volume is 20 L, and the work done by the gas... more
Chemical Engineering

12/23/22

thermodynamics mcq

What is the first law of thermodynamics? a) Energy cannot be created or destroyed b) The entropy of a closed system always increases c) Heat cannot be converted into work without some other change... more

12/20/22

The following reaction occurs at 298 K: Zn(s) + 2Ag+(aq)  Zn2+(aq) + 2Ag(s)

Topic: REDOX AND ELECTROCHEMISTRYQuestion:Sketch a diagram that shows how this cell could be set up. A voltmeter and two beakers, with some labels, are provided to give you a start. Add and label... more

12/20/22

Identify the oxidation numbers on all atoms in this reaction. Balance the reaction in acidic solution and basic solution.

SO42−(aq) + Al(s) ® SO32− (g) + Al3+(aq)
Chemical Engineering

11/07/22

Protein estimation

I want to measure the protein content of an unknown sample concentration. I’m wondering do I need to produce my own BSA curve? Or can I just use an online BSA curve and plug the absorbance value of... more
Chemical Engineering Mechanical Engineering

10/23/22

How to calculate Steam Generator Pressure in this cycle if you only have one turbine inlet condition?

A simple, superheated Rankine cycle has turbine inlet temperature of 900 K and condenser pressure of 20 kPa. The turbine has efficiency of 92% and the pump has efficiency of 85%. If the overall... more
Chemical Engineering Science Chemistry

10/01/22

What is the balanced equation of the chemical reactions involved in making toothpaste?

Like for example the balanced chemical equation for the synthesis of Urea is: 2NH3 (aq) + CO2 (aq) à CH4N2O (aq) + H2O (l)
Chemical Engineering Chemistry Organic Chemistry

09/29/22

I need help solving it by the rule of three #Chemistry

Rust contains an iron-oxygen compound in which there are three oxygen atoms for each two iron atoms. In this compound, the iron to oxygen mass ratio is 2.325:1. Another compound of iron and oxygen... more

09/18/22

chemistry question, HELP

The substance Fe2 O3 contains 2.325g of iron for every 1000g of oxygen. How much iron and oxygen compound contains these elements in the ratio 2.616g of Fe to 1000g of oxygen.What is the formula of... more
Chemical Engineering Chemistry

09/13/22

Mass Balance Diagram

I have a mass balance diagram where you're mixing sulfuric acid(40% concentrate) with sulfuric acid(90% concentrate) and it needs to be 250 lbm sulfuric acid with 98% concentrate. How do I do the... more
Chemical Engineering Math Science Biology

09/12/22

Senior High school Project ideas - Scientific

Hi! I’m doing a big project in Senior high school right now that plays a huge part in my graduation and would appreciate some help!I have to come up with an idea/subject that includes a good... more
Chemical Engineering Science Chemistry

08/29/22

if a sample containing...

If a sample containing 13.7 g of H2 is reacted with 31.9 g of O2, determine the theoretical yield of H2O.
Chemical Engineering Biology Chemistry Biochemistry

08/20/22

Chemistry uncertainty and sig figs

can anyone help me with this1) which number if the measure value is 8.4I26, which of the numbers has uncertainty2) if the scale division 0.1 unit, and the measurement values at 3.2 units, how do u... more

08/08/22

On Friday, March 11, 2011, Japan was hit with an earthquake that measured 8.9 (Please help me with this)

Shortly thereafter, a 13 foot wall of water engulfed the coastal villages and towns. The Fukushima Daichi nuclear power plant, which consists of 6 reactors, was built to withstand the earthquake.... more

08/08/22

On Friday, March 11, 2011, Japan was hit with an earthquake that measured 8.9 (Please help me with this)

Shortly thereafter, a 13 foot wall of water engulfed the coastal villages and towns. The Fukushima Daichi nuclear power plant, which consists of 6 reactors, was built to withstand the earthquake.... more
Chemical Engineering Chemistry Organic Chemistry

07/27/22

• The mass of Mg metal (99.5% pure) to prepare a 1000 ppm Mg solution in a 500 mL volumetric flask.

The mass of Mg metal (99.5 pure ) to prepare a 1000ppm Mg solution in a 500mL volumetric flask
Chemical Engineering Chemistry Organic Chemistry

07/27/22

• The mass of CaCO3 (AR grade) solid to prepare a 1000 ppm Ca solution in a 500 mL volumetric flask.

The mass of CaCO3 (AR grade) solid to prepare a 1000ppm Ca solution in a 500mL volumetric flask
Chemical Engineering Chemistry Organic Chemistry

07/27/22

The mass of KCl solid(AR grade) to prepare a 1000 ppm K solution in a 500 mL volumetric flask

The mass of KCl solid (AR grade) to prepare a 1000ppm K solution in a 500mL volumetric flask

05/11/22

Basic Chemistry

Please do show the complete solution and answer, that's all and thank you. 7.50 g of sodium chloride are added to 3200 mL of water. Find the mole fraction of the sodium chloride and of the water in... more
Chemical Engineering Chemistry

04/20/22

Cell Potential question

The standard electrode potential for Aluminum is found in Appendix 13 of the e-book (page 1107). Find the potential if the concentration of the ions in the solution is 0.546 M and the... more

04/12/22

AP Chem Need Help Urgent (Titration)

1. Answer all parts of the following question:a) The graph below shows the titration curves of a 1 M solution of a weak acid with strong base and 1 M solution of a strong acid with the same base.... more

04/07/22

Phase Changes : How much heat must be lost to freeze 75.3 g of water at 11°C?

How much heat must be lost to freeze 75.3 g of water at 11°C? 
Chemical Engineering Algebra 2 Calculus Chemistry

03/28/22

At a festival, spherical balloons with a radius of 160. cm are to be inflated with hot air and released. The air at the festival will have a temperature of 25°C 

It must be heated to 100°C to make the balloons float. 1.00kg of propane C3H8 fuel is available to be burned to heat the air. Calculate the maximum number of balloons that can be inflated with hot... more
Chemical Engineering Algebra 2 Calculus Chemistry

03/28/22

On a 5 day wilderness expedition you'll need to heat 4.0 kg of water to the boiling point each day. The air temperature will average 25°C.

You have available canisters of compressed butane C4H10 fuel, which you'll burn to heat the water. Each canister has 100.g of butane in it. What is the minimum number of fuel canisters you must... more

03/27/22

PLEASE HELP ME SOLVE THIS REACTOR DESIGN PROBLEM ASAP

A decomposition reaction (A →2P) takes place in a variable volume batch reactor in gas phase at 40°C and 303.39 kPa conditions and the following data are collected. The inititial molar percentage... more

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