How many moles of O2 are produced when 8 g of CH4 react in the following equation?
CH4 + 2 02 --> CO₂ + 2 H₂O

O2 moles
O 0.5 moles
O 8 moles
O 1 mole
O 0.25 moles

Answers

Answer 1

Answer:

1 mole

Explanation:

The balanced chemical equation for the reaction is:

CH4 + 2O2 → CO2 + 2H2O

The stoichiometric coefficients of the reactants and products indicate that one mole of methane reacts with two moles of oxygen gas to produce one mole of oxygen gas.

To find the number of moles of O2 produced when 8 g of CH4 react, we first need to convert the mass of CH4 to moles. The molar mass of CH4 is 16 g/mol. Therefore,

8 g CH4 × (1 mol CH4/16 g CH4) = 0.5 mol CH4

According to the balanced equation, 1 mole of methane reacts with 2 moles of oxygen gas. Therefore,

0.5 mol CH4 × (2 mol O2/1 mol CH4) = 1 mol O2

So, 1 mole of O2 is produced when 8 g of CH4 react in this equation.


Related Questions

A critical reaction in the production of energy to do work or drive chemical reactions in biological systems is the hydrolysis of adenosine triphosphate, ATP, to adenosine diphosphate, ADP, as described by:

ATP(aq) + H2O(l) <----> ADP(aq) + HPO42-(aq)
for which delta Gorxn = - 30.50 kJ/mol at 37.0 oC and pH 7.0. Calculate the value of delta Grxn in a biological cell at human body temperature in which the concentrations of ATP, ADP, and HPO42- are 5.6 mM, 0.3 mM, and 4.98 mM, respectively.

Report your answer in units of kJ/mol to 2 decimal places.

Answers

Alright fam, let's dive into this biochem stuff. It's all about energy, which is something we can all vibe with, right?

First up, we got the standard change in Gibbs free energy (ΔGº). That's like the default energy change happening when ATP breaks up into ADP and a phosphate ion. In this case, it's -30.50 kJ/mol at body temp (37.0 oC), at pH 7.0.

But things get interesting when we step into the real-world scenario, aka inside a human cell, where the ATP, ADP, and phosphate ion (HPO42-) concentrations aren't at "standard" levels (which are usually 1 Molar for each reactant and product).

Now, to calculate the Gibbs free energy (ΔG) under these conditions, we use a super handy formula:

ΔG = ΔGº + RT ln(Q)

where:

- R is the universal gas constant (8.314 J/mol*K), but for kJ/mol, we'll use 0.008314

- T is the temperature in Kelvin (we add 273.15 to the Celsius temperature to convert it, so 37.0 oC becomes 310.15 K)

- Q is the reaction quotient, which is products over reactants. For us, it's the concentrations of ADP and phosphate ion divided by the concentration of ATP. Keep in mind that water is not included 'cause its concentration is assumed to be constant in biological reactions.

So now let's run the numbers:

ΔG = -30.50 kJ/mol + (0.008314 kJ/mol*K * 310.15 K) * ln((0.3 mM * 4.98 mM) / 5.6 mM)

= -30.50 kJ/mol + (2.58 kJ/mol) * ln(1.49)

= -30.50 kJ/mol + 1.04 kJ/mol

And finally, we get:

ΔG = -29.46 kJ/mol

So that's it. In the cell, the Gibbs free energy change is -29.46 kJ/mol, a bit different from the "standard" conditions, thanks to the concentration levels in a human cell. The negative sign tells us the reaction is spontaneous, meaning it happens on its own without needing an energy push. So yeah, your cells are legit energy machines.

Hope that's clear, and remember, biochem is like the most epic game of tiny molecular Legos you could ever play!

how to explain the energy released by the reaction in terms of the law of conservation of energy

Answers

Chemical reactions can either absorb or release energy depending on the energy requirements of the reaction. When the products have a lower energy content than the reactants, the reaction is exothermic and releases energy to the surrounding environment.

This energy can be in the form of heat, light, or sound depending on the nature of the reaction. The amount of energy released by a reaction can be calculated by measuring the enthalpy change of the reaction, which is the difference between the enthalpy of the products and the enthalpy of the reactants. The law of conservation of energy states that energy can neither be created nor destroyed, but can only be converted from one form to another. In the case of an exothermic reaction, the energy released by the reaction is equal to the energy absorbed by the surroundings, as energy is conserved. This means that the total energy of the system and surroundings remains constant before and after the reaction. For example, when hydrogen gas reacts with oxygen gas to form water, a large amount of energy is released in the form of heat and light. This is an exothermic reaction as the energy content of the water is lower than the energy content of the hydrogen and oxygen gases. According to the law of conservation of energy, the total energy of the system and surroundings remains constant, so the energy released by the reaction is equal to the energy absorbed by the surroundings. In conclusion, the energy released by a chemical reaction is explained by the law of conservation of energy, which states that energy is conserved and cannot be created or destroyed, only converted from one form to another. Therefore, in an exothermic reaction, the energy released by the reaction is equal to the energy absorbed by the surroundings, ensuring that the total energy of the system and surroundings remains constant.

For such more question on exothermic

https://brainly.com/question/24808802

#SPJ8

Assignment Your Unde a professor in a University has Sent you an touration 6 his Inaugural lectore wate a letter to him, showing appreciation for him on halind gesture and Congratulating! his achievements So far​

Answers

In this letter, express gratitude to your uncle, a university professor, for his invitation and congratulate him on his achievements.

Here are the steps to be followed:

Start with a proper salutation: Dear [Uncle's Name],

Express gratitude and appreciation: Begin the letter by expressing your gratitude for your uncle's kind gesture in inviting you to his inaugural lecture. Show genuine appreciation for his thoughtfulness in including you in such an important event.

Congratulate your uncle on his achievements: Extend your heartfelt congratulations to your uncle for his accomplishments thus far. Acknowledge his hard work, dedication, and commitment to becoming a professor at the university. Highlight specific achievements or milestones that you find particularly impressive.

Share your excitement and anticipation: Express your excitement and anticipation about attending his inaugural lecture. Let your uncle know that you are looking forward to being a part of this significant moment in his career and witnessing his expertise in action.

Offer support and encouragement: Offer words of encouragement and support for your uncle's future endeavors. Let him know that you are proud of him and believe in his continued success. Encourage him to keep pursuing his passion and making a positive impact in his field.

Close the letter with warm regards: End the letter with a closing remark and warm regards. You can use phrases such as "Best regards," "With love," or "Sincerely," followed by your name.

Proofread and revise: Before finalizing the letter, review it for any errors or areas that may need improvement. Ensure that the tone is respectful, appreciative, and heartfelt.

Send the letter: Once you are satisfied with the letter, send it to your uncle either via traditional mail or email, depending on your preferred method of communication.

By following these steps, you can write a thoughtful and appreciative letter to your uncle, expressing your gratitude for his invitation and congratulating him on his achievements.

Know more about Letter here:

https://brainly.com/question/18879087

#SPJ8

What two air masses form a STATIONARY front?

Captionless Image
maritime polar
continental polar
maritime tropical
continental tropical

Answers

A stationary front is a boundary between two different air masses that aren't moving relative to each other, but instead are stationary.An air mass is a massive body of air with uniform temperature and moisture characteristics. An air mass takes on the qualities of the area where it forms. As an air mass moves from one place to another, it carries its temperature and moisture content with it.

It can change temperature and humidity, but not as quickly as it can change location.Types of air massesThe air masses are categorized based on two criteria. The first is the place of formation, while the second is the kind of surface over which they move. There are four types of air masses based on the place of formation, and two types based on the surface over which they move, for a total of six different types. Maritime tropical (mT): Warm and moist air masses that originate over water.Maritime polar (mP): Cold and moist air masses that originate over water.Continental tropical (cT): Dry and hot air masses that form over land. Continental polar (cP): Dry and cold air masses that form over land.A stationary front can be created when a mass of air with a uniform temperature and moisture characteristic meets an opposing air mass with similar characteristics but moving in a different direction. When a cold front and warm front meet and neither front is powerful enough to move the other, a stationary front occurs. The result is a stationary front that separates the two opposing air masses, like continental polar and continental tropical.

For such more question on temperature

https://brainly.com/question/27944554

#SPJ8

b. Through his meticulous experiments, Lavoisier first proposed what is now known as the law of
conservation of matter. A similar law developed later, which was called the law of conservation of
energy. (6 points)

Answers

Lavoisier's experiments led to the formulation of the law of conservation of matter, and a similar principle known as the law of conservation of energy was later established.

Through his meticulous experiments, Antoine Lavoisier laid the foundation for the law of conservation of matter, which states that matter cannot be created or destroyed in a chemical reaction, but only transformed from one form to another. Lavoisier's experiments demonstrated the principle of mass conservation, where the total mass of the reactants equals the total mass of the products.

Later on, a similar law was developed known as the law of conservation of energy. This law, also known as the first law of thermodynamics, states that energy cannot be created or destroyed in an isolated system, but it can be converted from one form to another. It signifies that the total energy of a closed system remains constant.

The discovery of these two fundamental laws revolutionized our understanding of the physical world. They demonstrate the fundamental principles of conservation that apply to both matter and energy, highlighting the interconnectedness and preservation of these fundamental entities. These laws provide a basis for studying and analyzing chemical reactions, physical processes, and energy transformations, allowing scientists to uncover the underlying principles governing the behavior of matter and energy in various systems.

Know more about first law of thermodynamics here:

https://brainly.com/question/21864813

#SPJ8

A vial of Ancef 1 g is reconstituted with 5 mL of normal saline to yield 125mg / m * L How many mL of the medication should be given if a patient is prescribed 250 mg of the medication?

Answers

Ancef (Cefazolin) is a first-generation cephalosporin antibiotic that is used to treat bacterial infections. Cefazolin is available in several formulations, including injectable, intravenous, and powder for injection.

A vial of Ancef 1 g is reconstituted with 5 mL of normal saline to yield 125mg / m * L. We need to determine how many milliliters of the medication should be given if a patient is prescribed 250 mg of the medication.To begin with, let us first calculate the concentration of the reconstituted solution using the given data.1 gram of Ancef (Cefazolin) = 1000 milligrams (mg)5 mL of normal saline = 5000 milligrams (mg)Therefore, the total volume of the reconstituted solution = 5 mL + the volume of Ancef (Cefazolin)1 g of Ancef (Cefazolin) = 125 mg/mL (Given)Therefore, the volume of Ancef (Cefazolin) = (250 mg)/(125 mg/mL) = 2 mLTherefore, the total volume of the reconstituted solution = 5 mL + 2 mL = 7 mLThus, the amount of medication that should be given to the patient is 2 mL.

For such more question on  antibiotic

https://brainly.com/question/11849121

#SPJ8

How much energy is required to heat a 60-ml cup of coffee that goes from room

temperature (25 C) to 80 C? (specific heat for water is 4.19 J/g C)

a. 14,000 J

b. 250 J

c. 20,000 J

d. 3300 J

Answers

The amount of energy required to heat a 60-ml cup of coffee that goes from room temperature 25°C to 80°C is 14,000J (option A).

How to calculate energy?

The amount of energy required to heat a substance can be calculated using the following formula;

Q = mc∆T

Where;

Q = quantity of energym = mass of substancec = specific heat capacity∆T = change in temperature

According to this question, a 60-ml cup of coffee goes from room temperature 25°C to 80°C. 60mL of coffee is equivalent to 60 grams.

Q = 60 × 4.19 × {80 - 25}

Q = 13,827J

Q ~ 14,000J

Learn more about energy at: https://brainly.com/question/26380678

#SPJ1

Reaction of carbon with hydrogen gas produces propane gas (C3H8).
3 C(s) + 4 H₂(g) →→→ C3H8(g) A Hrxn = -105 kJ

Answer the following questions.

Is this reaction endothermic or exothermic?

How may grams of carbon is necessary to produce 1220kJ of heat?

Answers

Approximately 139.47 grams of carbon are necessary to produce 1220 kJ of heat in this reaction.

The reaction of carbon with hydrogen gas to produce propane gas is an exothermic reaction. This can be determined based on the given information that the enthalpy change of the reaction (ΔHrxn) is -105 kJ. A negative value for ΔHrxn indicates that the reaction releases heat energy to the surroundings, indicating an exothermic process.

To calculate the amount of carbon required to produce 1220 kJ of heat, we need to use the balanced equation and the stoichiometry of the reaction.

From the balanced equation:

3 moles of carbon (C) produce 1 mole of propane (C3H8)

ΔHrxn = -105 kJ (heat released per mole of propane)

We can use the molar ratio between carbon and propane to calculate the moles of carbon required:

3 moles of carbon → 1 mole of propane

Moles of carbon = Moles of propane x (3 moles of carbon / 1 mole of propane)

= 1220 kJ / (-105 kJ/mol)

≈ -11.62 moles (note the negative sign indicates heat released)

Since we cannot have a negative number of moles, we can ignore the sign and take the absolute value. So, we need approximately 11.62 moles of carbon.

To convert moles of carbon to grams, we need to know the molar mass of carbon, which is 12.01 g/mol.

Mass of carbon = Moles of carbon x Molar mass of carbon= 11.62 moles x 12.01 g/mol

≈ 139.47 g

For more such question on carbon visit:

https://brainly.com/question/27860158

#SPJ8

Other Questions
Use the compound interest formula for compounding more than once a year to determine the accumulated balance after the stated period.A $20,000 deposit at an APR of 4.2% with quarterly compounding for 25 years.The amount after 25 years will be?(Round to the nearest cent as needed.) iii. \( \lim _{x \rightarrow 4} \frac{3(x-4) \sqrt{x+5}}{3-\sqrt{x+5}} \) need help all information is in the picture. thanks! (6 pts) Explain in words how the surfactants in soap and detergent can clean oil off your hands and your clothes. Use your drawing as evidence to support your explanation how intermolecular forces all Software Architecture and Design Patterns (a) Is it good to have a loosely-coupled system? Explain your answer. [4 marks]< (b) What are design patterns? [2 marks]< ( (c) What are the main cost and benefit of using design patterns? [4 marks]< (d) Describe the architectural styles of client/server and three-tier. Explain the main benefit of using the three-tier architecture in place of the client/server architecture. [5 marks] Fill in the following blanks. No need to show calculation steps. (2 points each, 10 points in total) a) Below shows the information of national income account for an economy in 2020 dollar values($ billions): -Government purchases 43 -Exports 24 - Taxes 25 - Investment 33 Imports 15 - Consumption 95 Based on the given information, the nominal GDP of 2020 is $ billion. If the GDP deflator is 120, the real GDP should be $. billion. In 2019 the GDP deflator was 80. Then the inflation rate between 2019 and 2020 is_%. b) Suppose the working-age population = 12000, unemployment = 1000, and the people not in labour force = 4000. The employment = The unemployment rate = %. Suppose market demand is given by QD = 90 - P and market supply is given by QS = 2 Pa) With no tax, what is the market equilibrium price and quantity?b) Now suppose the government imposes an excise tax of $9 per unit collected from the buyers. Find the equilibrium after the tax.c) Compute the following: (Hint: It may be helpful to draw a graph).Consumer surplus before the taxProducer surplus before the taxConsumer surplus after the taxProducer surplus after the taxGovernment tax revenueDeadweight loss of the taxd) Who bears the greater burden of the tax, consumers or producers? What does this tell you about the relative elasticities of supply and demand?e) Is the benefit to the government from imposing this tax greater than the loss of welfare to society? Explain For the data in problem 28, use the results of the regression equation to estimate the slope and intercept of the series at the end of June. Use these numbers as the initial values of slope and intercept required in Holt's method. Assume that = .15, B = .10 for all calculations. a. Suppose that the actual number of visitors using the park in July was 2,150 and the number in August was 2,660. Use Holt's method to update the estimates of the slope and intercept based on these observations. b. What are the one-step-ahead and two-step-ahead forecasts that Holt's method gives for the number of park visitors in September and October? c. What is the forecast made at the end of July for the number of park attendees in December? Suppose the government places a $10 excise tax on buyers of computers. Assume this market has a typical downward-sloping demand curve and upward-sloping supply curves. What will happen to the price of computers? A) Rise by $10 B) Buyers of computers will bear the entire burden of the tax C) Rise by less than $10 d) Rise by more than $10 E) Sellers of computers will bear the entire burden of the tax Assumeandare angles in the first quadrant, withsin()=6/11 andsin()=7/15. Determinecos(+). Answer = NOTE: Enter exact answers; decimal approximations will be marked incorrect. How did hurricane katrina lead to renewed concerns over civil rights in the United States Consider the market for American bonds. Let's say that current political upheaval has caused potential bond buyers to view American bonds as more risky than before. As a result, we'd expect to see the price of American bonds _______ and their yields to _______.Group of answer choicesfall; riserise; fallrise; risefall; fallConsider the market for liquidity preference. An increase in the interest rate determined in this framework could happen from which TWO of the following events, ceteris paribus?Scenario One: Average American incomes fall. Scenario Two: The Federal Reserve system does policy enacted to fight inflation. Scenario Three: Demand for American goods and services rises. Scenario Four: Firms decide to increase economic investment.Group of answer choicesScenarios One and TwoScenarios Three and FourScenarios Two and ThreeScenarios Two and Five a pilot flies in a straight path for 1 h 30 min. she then makes a course correction, heading 10 degrees to the right of her original course, and flies 2 h in the new direction. if she maintains a constant speed of 625 mi/h, how far is she from her starting position? Find all solutions of the equation in the interval [0, 21). cos 20 +2 cos 0=-1 Write your answer in radians in terms of it. If there is more than one solution, separate them with commas. H 00 JT 0,0,. at what time in geologic history did the Klamath mountains form? Grant receives the writing prompt below.Write an informative essay about the Greek hero, Jason. Summarize his unhappy youth and explain how he overcame obstacles to become great.Grants first research question is What happened in Jasons early life? What should his second research question be, and what would be the most credible source for research?Grant should ask,What was the name of the witch who assisted Jason? using a book about Greek mythology for research.Grant should ask,What was the name of the witch who assisted Jason? using a wiki page on Greek mythology for research.Grant should ask, How did Jason defeat his challenges and gain success? using a book about Greek mythology for research.Grant should ask, How did Jason defeat his challenges and gain success? using a wiki page on Greek mythology for research. Land use for energy cropping? is this a viable option? consider the case of a typical power station with a rated electrical output of 3600 MW:If it were to co-fire 10% biomass in the form of grass, how much would have to be set aside to produce this grass? Assume that a lower heating value of 16 MJ/Kg ( dry matter), a rainfall of 600mm and a dry-matter yield (in t/ha) related to rainfall by the correlation, Yield=(0.016 precip)- 1.05.Assume that the power station runs base load with 95% availability. Taylor's is a popular restaurant that offers customers a large dining room and comfortable bar area. Taylor Henry, the owner and manager of the restaurant, has seen the number of patrons increase steadily over the last two years and is considering whether and when she will have to expand its available capacity. The restaurant occupies a large home, and all the space in the building is now used for dining, the bar, and kitchen, but space is available on the property to expand the restaurant. The restaurant is open from 6 p.m. to 10 p.m. each night (except Monday) and, on average, has 26 customers enter the bar and 60 enter the dining room at the beginning of each of those hours. Taylor has noticed the trends over the last 2 years and expects that within about 4 years, the number of bar customers will increase by 50% and the dining customers will increase by 20%. Taylor is worried that the restaurant will be not be able to handle the increase and has asked you to study its capacity. In your study, you consider four areas of capacity: the parking lot (which has 90 spaces), the bar (64 seats), the dining room (110 seats), and the kitchen. The kitchen is well-staffed and can prepare any meal on the menu in an average of 12 minutes per meal. The kitchen, when fully staffed, is able to have up to 20 meals in preparation at a time, or 100 meals per hour ( 60 minute/12 minute 20 meals). To assess the capacity of the restaurant, you obtain the additional information: - Diners typically come to the restaurant by car, with an average of 3 persons per car, while bar patrons arrive with an average of 1.5 persons per car. - Diners, on average, occupy a table for an hour, while bar customers usually stay for an average of 2 hours. - Due to fire regulations, all bar customers must be seated. - The bar customer typically orders one drink per hour at an average of $8 per drink; the dining room customer orders a meal with an average price of $21; the restaurant's cost per drink is $2, and the direct costs for meal preparation are $4. Required: 1-a. Given the current number of customers per hour, what is the amount of excess capacity in the bar, dining room, parking lot, and kitchen? 1-b. Calculate the expected total throughput margin for the restaurant per day, and month (assuming a 26-day month). 2-a. Given the expected increase in the number of customers, determine if there is a constraint for any of the four areas of capacity. What is the amount of needed capacity for each constraint? 2-b. If there is a constraint, reduce the demand on the constraint so that the restaurant is at full capacity (assume some customers would have to be turned away). Calculate the expected total throughput margin for the restaurant per day, and month (assuming a 26 day month). Complete this question by entering your answers in the tabs below. Given the current number of customers per hour, what is the amount of excess capacity in the bar, dining room, parking lot, and kitchen? (Round Intermediate computation of capacity to the nearest whole number.) Calculate the expected total throughput margin for the restaurant per day, and month (assuming a 26 -day month). (Round intermediate computation of capacity to the nearest whole number.) Given the expected increase in the number of customers, determine if there is a constraint for any of the four areas of capacity. What is the amount of needed capacity for each constraint? (Round intermediate computation of capacity to the nearest whole number.) If there is a constraint, reduce the demand on the constraint so that the restaurant is at full capacity (assume some customers would have to be turned away). Calculate the expected total throughput margin for the restaurant per day, any month (assuming a 26-day month). (Round intermediate computation of capacity to the nearest whole number) There are moles of hydrogen atoms present in2.57gramsof ethanol,C2H5OH. Hint the molar mass ofC2HOHis46.07gmmol. harper is a mid-level supervisor in a university administrative office. some of the employees feel that the office lacks true equity. harper has to do employee evaluations soon. what action should harper take to reduce the feelings of inequity associated with the office? multiple choice give every employee exactly the same evaluation score make employee evaluate their peers anonymously through a random drawing give employees honest evaluation scores based on their performance, good or bad avoid giving any really low evaluation scores to employees who have complained avoid giving any really high evaluation scores to employees who are seen as favorites