if 209g of ethanol are used up in a combustion process, calculator the volume of oxygen used for the combustion at stp
help plzz
Answers
Answer:
a) The volume of oxygen used for combustion at STP is approximately 305 dm³
b) The volume of gas released during combustion at STP is approximately 508 dm³
Explanation:
The given chemical reaction equation for the burning of ethanol in air, is presented as follows;
2CH₃CH₂OH (l) + 6O₂ (g) → 4CO₂ (g) + 6H₂O
The mass of ethanol used up in the combustion process, m = 209 g
The molar mass of ethanol, MM = 46.06844 g/mol∴
The number of moles of ethanol in the reaction, n = m/MM
∴ n = 209 g/(46.06844 g/mol) ≈ 4.537 moles
a) Given that 2 moles of ethanol, CH₃CH₂OH reacts with 6 moles of oxygen gas molecules, O₂, 4.54 moles of ethanol will react with (6/2) × 4.537 = 13.611 moles of oxygen
The volume occupied by one mole os gas at STP = 22.4 dm³
The volume occupied by the 13.611 moles of oxygen gas at STP, 'V', is given as follows;
V = 13.611 mol × 22.4 dm³/mole = 304.8864 dm³ ≈ 305 dm³
The volume occupied by the 13.611 moles of oxygen gas at STP, V = The volume of oxygen used for the combustion ≈ 305 dm³
b) The total number of moles of gases released in the reaction, is given as follows;
The total number of moles = (4.537/2) × (4 + 6) = 22.685 moles of gas
The total volume of gas released, [tex]V_T[/tex] = The volume of gas released during the combustion at STP = 22.685 moles × 22.4 dm³/mole = 508.144 dm³ ≈ 508 dm³
Related Questions
Use the drop-down menus to complete the statements about printing Contacts. When printing a single contact, go to File and then Print; the only style available is Memo style . When printing multiple contacts, there are several styles to choose from.
Answers
Answer:
When printing a single contact, go to File and then Print; the only style available is Memo style .
When printing multiple contacts, there are several styles to choose from
Explanation:
The question has been answered (by you). I will help you with the explanation. The texts in bold in the answer section represent the answer.
The question is an illustration of Microsoft outlook.
In Microsoft outlook, the default style of printing is the memo style of printing. This is the only form of printing allowed when printing single contacts. In other words, other forms of printing cannot be selected.
However, there are several options available when multiple contacts are to be printied. Some of the printing styles are: phone directory style, card style, medium booklet style, etc.
Answer:
1. is memo style
2. is mulitiple
Explanation:
You have copied the data highlighted in the dotted box. What would be the result if you did PASTE command at the selected cell ?
Answers
Answer:
The data would be copied over to the new box
Explanation:
how to bold words in microsoft word
Answers
Answer:
highlight what you want to bold and then press CTRL+B.
Explanation:
Hope this helped.
What type of tool displays preferred content from several sources, such as RSS feeds, social networking tools, and social news websites?
Answers
Answer:
Aggregator
Explanation:
The answer to this question is an aggregator. An aggregator us a tool that is useful for discovering content as well as acting as a content curator from different social media outlets and then puts them into one feed. This feed could then be shown across all channels. The feed after it has Ben combined can be shown on a website.
Define the term editing
Answers
Answer:
editing is a word file mean making changes in the text contain is a file. or a word file is one of the most basic ms office word operation.
In which patten the modern computer work ?
Answers
Answer:
Modern computers can perform generic sets of operations known as programs. These programs enable computers to perform a wide range of tasks.
Which factors make the prevention of cyberbullying difficult? Check all that apply.
speaking out publicly that cyberbullying is a problem
disbelieving that cyberbullying causes serious harm
convincing others that cyberbullying is harmless
refusing to take responsibility to stop cyberbullying
using technology to participate in cyberbullying
collecting evidence that cyberbullying has occurred
Answers
Answer:
disbelieving that cyberbullying causes serious harm
convincing others that cyberbullying is harmless
refusing to take responsibility to stop cyberbullying
using technology to participate in cyberbullying
Explanation:
We can categorize the 6 given options into 2 categories.
(1) The factors that makes the prevention easy
(2) The factors that makes the prevention difficult
Options (a) and (f) can be categorized under 1 because when one speaks up or gather evidence when one gets cyberbullied, that means that an awareness has been created and as such, one and others would know how to prevent themselves from being cyberbullied.
However, the same cannot be said for (b), (c), (d), and (f). In fact, these 4 options contribute to the growth of cyberbullying. One must shun each of these 4 activities.
Write a C++ program to count even and odd numbers in array. The array size is 50. The array elements will be entered by the user.
Answers
Answer:
The program in C++ is as follows:
#include <iostream>
using namespace std;
int main(){
int numbers[50];
int evekount = 0, odkount = 0;
for(int i = 0; i<50;i++){
cin>>numbers[i];
if(numbers[i]%2==0){ evekount++; }
else{ odkount++; }
}
cout<<"Even Count: "<<evekount<<endl;
cout<<"Odd Count: "<<odkount<<endl;
return 0;
}
Explanation:
This declares the integer array of number
int numbers[50];
This initializes the even count and odd count to 0
int evekount = 0, odkount = 0;
This iterates from 1 to 50
for(int i = 0; i<50;i++){
This gets input for the array
cin>>numbers[i];
This checks for even
if(numbers[i]%2==0){ evekount++; }
This checks for odd
else{ odkount++; }
}
This prints the even count
cout<<"Even Count: "<<evekount<<endl;
This prints the odd count
cout<<"Odd Count: "<<odkount<<endl;
# is used for single line comment and triple quotes(‘ ' ' or " " " ) are used for multiline comments. true or false
Answers
Answer:
False
Explanation:
In Python the symbol # is used for a single line comment, but it is the only way to comment anything in this language. Triple quotes are not for comments, instead they are used in order to easily implement multi line strings into your code without having to create various one-line strings. However triple quotes will never comment out the information in between the quotes. Therefore, the statement being made is ultimately false.
In a forest ecosystem, which of the following is the best example of a limiting factor for a rabbit population?
Answers
Answer:
A rise in the population of predators is followed by a decrease in the population of prey.
Cuales de estos aparatos son ejemplo de mecanización automatizacion o robotica batidora electrica , grifo de un cuarto de bño publico que se detiene al cabo de un cierto tiempo y maquina fotocopiadora digital
Answers
Answer:
La automatización es el reemplazo del trabajo humano por máquinas o computadoras y programas de computadora. El motivo es económico: la suma de trabajo y consumo de materias primas es menor después de la automatización que antes.
Las formas de automatización se pueden encontrar a nuestro alrededor. Los semáforos son operados por un sistema automatizado. La caja registradora de la tienda que paga los alimentos hace más que sumar el precio de los artículos; también es la base de un sistema de gestión de inventarios. Tan pronto como se vende un artículo, se reserva inmediatamente y se puede pedir un artículo de reemplazo.
Robots are more prevalent today than they were just a few years ago, tackling tasks that range in importance from cleaning floors to teaching students to diagnosing illnesses. With this progress comes possible job loss for janitorial personnel, educators, doctors, and others. Discuss some areas where you find this technology helpful as well as areas you feel more confident in human decision making. List some pros and cons of robotic technology and provide real life examples. For instance, many people would relish the thought of owning a robotic sweeper but would cringe if their children were being taught by a robot sporting a face and using personalized conversation.
Answers
Answer: Some areas that technology would be useful are Agriculture, Health Care, and the Military.
But some jobs that humans are better at could be jobs that require Creativity and strategic thinking
Explanation:
Hope this helped
The CEO of CorpNet.xyz has hired your firm to obtain some passwords for their company. A senior IT network administrator, Oliver Lennon, is suspected of wrongdoing and suspects he is going to be fired from the company. The problem is that he changed many of the standard passwords known to only the top executives, and now he is the only one that knows them. Your company has completed the legal documents needed to protect you and the company. With the help of a CorpNet.xyz executive, you were allowed into the IT Admin's office after hours. You unplugged the keyboard from the back of the ITAdmin computer and placed a USB keylogger into the USB, then plugged the USB keyboard into the keylogger. After a week, the company executive lets you back into the IT Admin's office after hours again. In this lab, your task is to use the keylogger to recover the changed passwords as follows: Move the keyboard USB connector to a different USB port on ITAdmin. Remove the keylogger from ITAdmin. Move the consultant laptop from the Shelf to the Workspace. Plug the keylogger into the consultant laptop's USB drive. Use the SBK key combination to toggle the USB keylogger from keylogger mode to USB flash drive mode. Open the LOG.txt file and inspect the contents. Find the olennon account's password. Find the Administrator account's password. Answer the questions.
Answers
Answer:
The olennon account's password: See the attached file for this.
The Administrator account's password: 4Lm87Qde
Explanation:
Note: See the attached excel file for the olennon account's password as I was unable to save it here because I was instead getting the following message:
"Oh no! It seems that your answer contains swearwords. You can't add it!"
The olennon account's password and the Administrator account's password can be found as follows:
To see the rear of the computer, click Back from the menu bar above the computer.
Drag the USB Type A connector for the keyboard from the rear of the computer to another USB port on the machine.
Make sure the keyboard is plugged back in.
Expand System Cases on the shelf.
Add the Laptop to the Workspace by dragging it there.
To see the rear of the laptop, click Back from the menu above the laptop.
Drag the keylogger from the computer to the laptop's USB port.
Select Front from the menu above the laptop to see the front of the laptop.
Select Click to display Windows 10 on the laptop.
Toggle between keylogger and flash drive mode by pressing S + B + K.
To control what occurs with detachable drives, select Tap.
To view files, choose Open folder.
To open the file, double-click LOG.txt.
Select Answer Questions in the top right corner.
Respond to the questions.
Choose Score Lab as the option.
Therefore, we have:
The olennon account's password:
The Administrator account's password: 4Lm87Qde
One of the users in your company notices some strange behavior on his PC. After describing what is being seen, you do a little research and determine that the best course of action is to update the UEFI firmware. Before performing the upgrade, if possible, which of the following is the BEST action to take?
A. Upgrade the processor
B. Password protect the system
C. Connect the computer to a UPS
D. Change the motherboard battery
Answers
Answer:
B
Explanation:
I don't know the explanation to this
The best action to take is to password protect the computer system. Hence option B is correct.
What is computer system?Computer system is defined as a fundamental, full-featured, and operational hardware and software arrangement that includes all necessary components to implement computer performance. Computers are currently extremely significant since they are highly accurate, quick, and capable of completing a variety of jobs with ease.
Keeping your anti-virus software up to date and regularly scanning your computer for viruses is one of the most crucial tasks in maintaining your computer's efficiency and security. Always put password on the computer so that unknown person does not easily user your computer or hacker will not able to hack your computer easily.
Thus, the best action to take is to password protect the computer system. Hence option B is correct.
To learn more about computer system, refer to the link below:
https://brainly.com/question/17206337
#SPJ5
Terry visits the website www.examplewebsite.org. What can you gather about the site from the domain?
ОА.
It is a commercial website.
OB.
The website belongs to an organization.
Ос.
The website was set up in Oregon.
OD.
The website is 100 percent original.
O E.
It is a government website.
Answers
Explanation: This question asks the student to consider the domain .org. The student needs to know that org is short for organization. This would point to option B. For option A to be true, the domain would need to be .com. Option C and D couldn’t be true, as there is no domain to point to these options. For option E to be true, the domain would need to be .gov.
Hope this helps! Comment below for more questions.
write a program to enter base and height of a triangle and print area of rectangle using Q Basic. (class8)
Answers
Answer:................................
Cls
Input " enter the base";b
Input" enter the height ";h
A = b*h
Print" the area of triangle=" ;a
End
what are network services?
Answers
Answer: A networking service is a low-level application that enables the network to perform more than basic functions.
Match each word to its correct meaning.
visual representations of
1. clip art
information that are not text-images,
photos, symbols, diagrams, and so on
2. graphics
digital artwork that can be used in
documents
Answers
Answer:
1. Graphics.
2. Clip art.
Explanation:
1. Graphics: visual representations of information that are not text-images, photos, symbols, diagrams, and so on. Some examples of software applications used for graphics design are CorelDraw, Adobe Illustrator, Affinity Designer, Inkscape, Adobe Photoshop, etc.
Adobe Photoshop is a proprietary software application designed and developed by Adobe inc. for both Windows and MacOS operating system. It is a raster graphics editor that's typically used for imaging and graphics design. It comprises of various shape tools such as ellipse, line, polygon, triangle, custom shape and rectangle.
2. Clip art: digital artwork such as symbols and pictures that can be imported for use in documents or other software applications.
Answer: Clip art: digital artwork can be used in documents
Graphics: visual representations of information that are not text, images, photos, symbols, diagrams, and so on
Explanation: Answered it on Edg 2021
GUITAR
An ensemble is a group of two or more musical-
chairs
chords
notes
performers
Answers
which of the following is not an example of a cyber crime?
A. cybers talking
b. prank phone call's
c. phishing scams
d. identity theft
Answers
Create a flowchart that assigns a counselor to a student. You need to ask a student for the first letter of his/her last name. Assign a counselor based on the following criteria:
• A through Mare assigned to Ms. Jones
• N through Z are assigned to Mr. Sanchez
Answers
Answer:
See attachment for flowchart
Explanation:
The explanation is as follows:
Start
Input first_letter (of student's name)
If first_letter is any of N through Z
Assign student to Mr. Sanchez
Else
Assign student to Ms. Jones
Print Counselor
Stop
why it's important for designers to consider the environmental impact of a
product they design.
Answers
Answer:
Kindly check explanation
Explanation:
The environment is our abode which aids the continued survival and growth of plant, animals and humans. The most important components and natural resources which are neceaaaarybto dwell and survive are all waht a makes up an enviromment. The energy derived from the sun aids power generation, plant growthbduring photosynthetic activities which is rewired to produce crops and feed us. The air we breathe are all a part of our enviromment. Therefore, such environment which provides a canvas or platform for our existence must be greatly cared for and no technological innovation, project or design must be allowed to impact negatively on the enviromment. Thus the need for impact assessment of systems in other to ensure that our abode isn't threatened.
which of the following is not a bus type A. Address bus B. Data bus C. Memory bus D. Control bus
Answers
Answer:
Answer is memory bus.
Explanation:
Answer is memory bus.
What is the SPECIAL NAME used to describe all the types of drawings which allows three faces to be seen at one time?
Answers
Answer:
3d or 3 dimensional??? I'm not sure but it sounds like it
Answer:
Orthographic projection is a name given to drawings that usually have three views. Often, the three views selected are the top, front, and right side.
hope this helps!
Can you identify one syntax error and one logic error in these lines? How do you think you could avoid making logic errors like the one in this code?
You are creating a program in which the user will input his or her age. The program will calculate the year that the user was born and will then tell the user which decade he or she was born in. Here is part of the code:if year > 1989 and year < 2000 print("You were born in the 1980s")
Answers
Answer:
(a) Syntax Error: Missing colon symbol
(b) Logic Error: The condition is wrong
Explanation:
The programming language is not stated; so, the syntax error may not be correctly identified.
Assume the programming language is Python, then the syntax error is the missing colon symbol at the end of the if statement. This is so because, Python required a colon symbol at the end of every if condition statement.
The logic error is also in the condition.
The condition states that all years later than 1989 but earlier than 2000 are 1980s. This is wrong because only years from 1980 to 1989 (inclusive) are regarded as 1980s.
Liam and his team developed a social networking group site for their company. They launched the site, and more than 100 users have already
joined, with the number of users growing each day. Above all else, which critical user requirement must Liam and his team meet?
ОА.
ability to access old messages posted by users
OB.
free access to the site
Ocability to upload user videos
OD.
user privacy and confidentiality issues
Answers
Answer:
D. user privacy and confidentiality issues
Explanation:
Software development life cycle (SDLC) can be defined as a strategic process or methodology that defines the key steps or stages for creating and implementing high quality software applications.
There are seven (7) main stages in the creation of a software and these are; planning, analysis, design, development (coding), testing, implementation and execution, and maintenance.
Basically, the two (2) essential privacy concerns in the field of cybersecurity are knowing how personal data are collected and essentially how they're used by the beneficiaries or end users.
Above all else, the critical user requirement Liam and his team must meet is user privacy and confidentiality issues.
Confidentiality refers to the act of sharing an information that is expected to be kept secret, especially between the parties involved. Thus, a confidential information is a secret information that mustn't be shared with the general public.
3. Explain five (5) reasons why computers are so powerful.
the following software threats.
Answers
Answer:
Software development brings your business to new heights of integration. It allows your company to be accessible from almost anywhere via smartphone or computer.
It improves sales and service. The way your customers experience your business is very important. Do you want them to provide you with positive feedback? Then you can’t avoid having an online platform to make it easier for them to reach your services and products.
It helps to implement on-the-go marketing, promoting your products at any place and any time without additional expenses and extra time needed. It doesn’t matter where your customers are. They can access your ads anytime and from anywhere.
It increases customers’ engagement. As with any other business, you probably want to have loyal customers. How should you increase the number of such customers? Work on online marketing strategies. Increase customers’ engagement through the website and application and make them always come back to you, not to your competitor.
Direct communication. Any other strategy can’t bring you an opportunity of direct communication with the customers at the same level as this one does. Direct communication with your customers is the fastest way to boost your brand.
Explanation:
What is the purpose of the green flag in the Scratch interface?
A. It opens the sprite menu.
B. It saves and shares the game.
C. It begins the program.
D. It opens the costumes palette.
Answers
Answer:
C. It begins the program.
Explanation:
how many country on earth
Answers
Answer:
195 countries
I think Soo
Answer:
there are 195 countries on earth
do earthquakes ever happen in Malaysia?
Answers
The correct answer to this open question is the following.
Although there are no options attached we can say the following.
Do earthquakes ever happen in Malaysia?
Yes, they do. And they are very frequent and high in intensity.
For instance, the Sabah earthquake in 2015.
On June 5, 2015, the region of Malaysia was hit by a strong earthquake, 6.0 of magnitude on the Ritcher scale. The telluric movement lasted 30 seconds and caused much destruction.
Experts and scientists confirm that this had been the strongest earthquake since the one presented in 1976.
