B

This page lists questions and answers that were posted by visitors named B.

Questions

The following questions were asked by visitors named B.

Is the molar enthalpy of combustion of pentane the same as the molar enthalpy of formation of pentane? No. The molar enthalpy for the combustion is for the reacton C5H10 + (15/2)O2 ==> 5CO2 + 5H2O The molar enthalpy for the formaton is 5C(graphite) + 5H2(...

we did a field study of two different sites...one was a grassland and one was a forest... considering that our two sites were so close together, why were the abiotic factors in the sites not identical?

How would you solve this problem?... magnesium metal reacts rapidly in hot water. Predict the mass of pericipitate that will form if a 2.0g strip of magnesium reacts completely with water. *Use the 5-step method* *Answer: 4.8g* I don't know what the five...

i was wondering if someone could either suggest to me some good websites or actually post the info about the gist of the book "lovely bones" esp. the main character...i have no idea what this book is about or anything, but there is an attempt at a product...

i'm working on this essay on y i'm proud to be an American and i wanted to prove some points about what people in other countries can't do, concerning freedoms and rights, that we can. can anyone help me with some examples? thank you!

How do you convert 3secs. into days?

The problem really said convert 3 seconds into days. Then the next question was convert 2 inches into yards.

A chemist was asked to find the molecular mass of a gas. She massed the gas and found that 3.73 g of the gas occupied 300 cm3 at 25°C and 92.4 kPa. What is the molecular weight of the gas?

what is the value of log10 6.85 to the nearest ten thousandth

How to solve 16a^2=14,400

Whatis the chemical name of the substance formed in the slow reaction that takes place when iron filings are mixed with water?

Two cards are drawn without replacement from an ordinary deck of 52 playing cards. What is the probability that the second card is a number card, if the first card was a queen? The face cards are King, Queen, Jack. The number cards are ace – 10.

Consider the experiment of drawing two cards without replacement from an ordinary deck of 52 playing cards. What are the odds against drawing two kings?

A mass is thrown upwards with an initial velocity of 30m/s. A second mass is dropped from directly above, a height of 60m from the first mass 0.50s later. When do the masses meet and how hight is the point where they meet?

A mass is thrown upwards with an initial velocity of 30m/s. A second mass is dropped from directly above, a height of 60m from the first mass 0.50s later. When do the masses meet and how hight is the point where they meet? I NEED TO KNOW HOW TO SHOW THIS...

Givin these 9 hypothesis we are supposed to state if they are inductive or deductive 1. Male Red-winged Blackbirds display red wing patches to signal superiority to other males 2. Bees make honey 3. Male red-winged Blackbirds compete for territories and t...

Please answere these questions: identify each statement as observation, hypothesis, or prediction and then tell if it is inductive or deductive Male Red-winged Blackbirds display red wing patches to signal superiority to other males A male Red-winged Blac...

Suppose you are playing a word game with seven distinct letters. How many seven-letter words can there be?

okay I am converting some measurements and is 30.16 mm larger or smaller than 27 mm? and then 22.2 mm is larger or smaller than 20.64 mm?

What is neoliberalism? examples?

I need to know the main concepts of either the Protestant or Catholic Reformation?

In Jonathan Swift's "A Modest Proposal" help me to discuss how it relates to the issues of proverty, depravity, and suffering that plagued English society even in the face of human progress idealized during the Age of Enlightment. Thanks!!

Find the slope of the tangent line to the graph of the function at the given point. g(x) = 3 x + 4, (-4, 1)

Solve: csc x = 2, 0¡Üx<2¦Ð

Retrograde motion describe the A backward motion of the stars relative to Earth B uniform circular motion exhibited by the planets C irregular speeds at which the planet travel. D backward motion of the planets with respect to the stars I think the answer...

Explain how the potential energy of carbon and its ability to tetramerize lead to the development of macromolecules

Comparisons of amino acid sequences from different organisms often shed light on the evolutionary divergence of related species. Would you expect all of the proteins of a given set of living species to show the same degree of divergence?

What is the heat capacity of 190g of liquid water? I came up with 794.96 but it says my sig figs are wrong? Help?????

How many moles of water can be obtained from 19.7 g of CoCl2·6H2O?

Which of the following mixtures will result in the formation of a buffer solution when dissolved in 1.00 L of water? i) 0.50 mol NaOH and 0.50 mol HCl. ii) 0.50 mol NaCl and 0.25 mol HCl. iii) 0.50 mol NaF and 0.25 mol HF. iv) 0.50 mol NaOH and 0.25 mol H...

Post a 200- to 300-word response to the following: Describe the stages of sleep. In which stage do we dream? What are the five common beliefs about dreaming? What are the two common theories about dreams?

What are the four methods for studying the cerebral lateralization? I have three I just don't know what the fourth is. 1. The sodium amytal test 2. The dichotic listening test 3. Functional brain imaging 4. ?

what is the neural basis of schizophrenia?

Determine the longest wavelength of light required to remove an electron from a sample of potassium metal, if the binding energy for an electron in K is 1.76 × 103 kJ/mol.

A Norman window has the shape of a rectangle surmounted by a semicircle as in the figure below. If the perimeter of the window is 37 ft, express the area, A, as a function of the width, x, of the window. How do you do this problem?

I have to find the verbs in the preterite and the imperfect but I'm getting them marked wrong. 1. Mi amiga Anita siempre tenía dolor de cabeza cuando estudiaba. my answer: tenía; estudiaba 2. El diente me dolió todo el fin de semana pero el lunes el denti...

Simplify the ratio of factorials. (n+2)!/(n-1)!

A kettle heats up 1.5L of water from 22 degreesC to 90 degreesC in 4 min. What power did the water receive?

if b is between a and c find the value of x and the measure of bc (ab=3x,bc=5x,ac=8)

from the intervals 0 less than or equal to theda less than 2 pie, what is cot theda of 2

CAN 1+1+1=3 BE WRITTEN AS A MULTIPLICATION SENTENCE

One morning, 8/9 of the customers at the diner ordered coffee. Regular coffee was ordered three times as much as flavored coffee. What fractional part of the customers orderd flavored coffee? I did it this way 8/9x3/1= 24/9=8/3 It is wrong so please show...

Carbon atoms have 6 protons in their nucleus. In nm, at what distance from a carbon nucleus is the electric potential 3.1 V? I'm really confused with this question. I've been trying it for a while and cannot seem to get the right answer.

Michael invested his savings in two investment funds. The amount he invested in Fund A was $2,000 less than the amount he invested in Fund B. Fund A returned a 4% profit and Fund B returned a 3% profit. How much did he invest in Fund A, if the total profi...

A sample gas has a volume of 200 cm^3 at 25 degrees celsius and 700 mmHg. If the pressure is reduced to 280 mmHg, what volume would the gas occupy at the same temperature?

Consider 125 mL of 0.110 M MgCl2 solution. a. How many moles of MgCl2 are contained in 125 mL of 0.0110 M MgCl2? b. What is the concentration of Mg2+ ion? c. What is the concentration of Cl- ion?

Axel Corporation acquires 100% of the stock of Wheal Company on December 31, Year 4. The following information pertains to Wheal Company on the date of acquisition:

(u+4)cubed + 80=0

a how to solve the problem when on 100 point examination with mean 60, SD 10, if there are 5% A, 5% F, 15% B, 15% D, and 60% C, find the scores that devide the distribution into those catagories.

What is the truth value of the sentence "P v ~ P"? True False Cannot be determined Not a sentence My answer is false, Is this correct?

(3.) The plane 2x + 3y – 4z = 5 intersects the x-axis at (a,0,0), the y-axis at (0,b,0), and the z-axis at (0,0,c). The value of a + b + c is?

lim x-->infinity (3x^2+4x-5)/(6x^2+3x+1)

A person holds a 1.42N baseball in his hand, a distance of 34.0cm from the elbow joint, as shown in the figure . The biceps, attached at a distance of 2.75cm from the elbow, exerts an upward force of 12.6N on the forearm. Consider the forearm and hand to...

If 215.0 mL of water are added to a 237 mL sample of a 1.702 M dextrose solution, what is the new molarity of dextrose in the resulting solution?

Calculate the total force of the atmosphere acting on the top of a table that measures 1.9 m by 2.3 m.

Eight people in a room have an average height of 66 inches. A ninth person enters the room. How tall would he have to be to raise the average height by 0.5 inches?

Suppose that the average annual salary for city employees is $36,000 with an SD of $12,000. The city council decides to give everyone a raise of $400 per year. What is the new average salary and the new SD?

A geologist finds that a Moon rock whose mass is 9.97 kg has an apparent mass of 6.40 kg when submerged in water. What is the density of the rock?

Reno, Nevada and Salt Lake City, Utah are about 400 miles apart today. Yet 15 million years ago they were only 250 miles apart. The continental crust is being stretched by plate tectonic forces. How many inches per year do the two cities move away from ea...

1. What if the size for each sample were increased to 20? Would a sample mean of 115 or more be considered unusual? Why or why not? 2. Why is the Central Limit Theorem used? 3. Consider situations in your work or home that could be addressed through a con...

A gas sample has an initial volume of 4.5 liters at a pressure of 731 mmHg. If the volume is increased to 8.9 liters, what is the pressure?

What is the volume occupied by 12.3 g or argon gas at a pressure of 1.17 atm and a temperature of 455K?

What is the volume occupied by 12.3 g of argon gas at a pressure of 1.17 atm and a temperature of 455K? Would formula be V=T/P? 388.89 L?

What is the volume occupied by 12.3 g or argon gas at a pressure of 1.17 atm and a temperature of 455K? Unable to understand formula suggested Dr. Bob. Please explain further.

What is the volume occupied by 12.3 g or argon gas at a pressure of 1.17 atm and a temperature of 455K? So...Dr. Bob... PV=nRT 1.17V=(12.3)(.08206)(455K) V=459.25/1.17 V=392.5L ???

Attn: Dr. Bob Thank you so much for your help on this--greatly appreciated!

Calculate the enthalpy of the reaction 2B2H6 + 6O2=2B2O3 +6H2O given the following pertinent information: A. B2O3(s) + 2H2) )g) = 3O2 (g) + B2H6 (g), delta H= +2035kJ B. 2B (s) + 3H2 (g) =B2H6 (g), delta H= +36 kJ C. H2 (g) + 1/2)2 (g) =H2O (l), delta H=-...

What is a bipolar racial classification system? Thanks!

A 350 N child is in a swing that is attached to a 7.50 m long rope. find the gravitational potential energy associated with the child relative to her lowest position when a) the ropes are horizontal, (b) the ropes make a 30 degree angle with the vertical,...

What is the answer to the following: Many ____ stomachs were often empty. A refugees B refugee's C refugees' D refugees's

What is the answer to the following: Money might be sewn into ___ coat A. women's B. woman's C. womens' D. womans'

Answer the following ____ stories seemed unbelievable. A. Survivors B. Survivor's C. Survivors' D. Survivors's

Consider the Earth and a cloud layer 600 m above the planet to be the plates of a parallel-plate capacitor. (a) If the cloud layer has an area of 2.0 km2 = 2000000 m2, what is the capacitance?

What is can find in the following sentence: You can find properties of science in a basic clock. A. Main verb B. Helping verb C. Both D. Neither I say it is C Both, is this right?

What is on batteries in the following sentence: These clocks often run on batteries. A. Main verb B. Helping verb C. Both D. Neither Is it D Thanks

If the theoretical yield of a reaction is 18.6 grams & 7.6 grams were collected the.experiment, what is the percent yield

At the beginning of a new school term, a student moves a box of books by attaching a rope to the box and pulling with a force of 92 N at an angle of 30 as shown in the figure below. The box of books has a mass of 22.0 kg, and the coefficient of kinetic fr...

what is 14.76 rounded to the nearest hundredth?

28. Which answer best describes how some enslaved African Americans expressed their emotions? (4 points) They didn’t believe in public emotional displays, so they would often express themselves only to the tribal chief. They participated in sports like ar...

Car A is traveling at 18 m/s and car B at 25 m/s. Car A is 300m behind car B when the driver of Car A accelerates his car with an acceleration of 1.80m/s^2. How long does it take car A to overtake car B?

Need thesis stAtement for persuasive research paper on cs lewis

how to prepare a 250 mL solution of .15 M K2SO4 with a volumetric flask

A mountain-climbing expedition establishes two intermediate camps, labeled A and B in the drawing, above the base camp. What is the magnitude Δr of the displacement between camp A and camp B?

Ryan estimates that he uses 2/3 cup of syrup each time he eats pancakes. How many times will he be able to eat pancakes without running out of syrup if he has a giant bottle of syrup that contains 48 cups. Do you multiply 48x2/3 and get that he will be ab...

Assume that frog muscle cell membrane is permeable to Na and K only. The membrane permeabilities for Na and K are Pna and Pk respectively. At 16∘C, the resting membrane is -91 mV. What is the ratio of permeabilities Pna/Pk? For frog muscle, intracellular...

At a temperature of 10∘C, the concentrations of ions are: IonIntracellularExtracellular Na61485 K28010 Cl51485 The transmembrane potential is -30 mV. How many ion species (Na, K, or Cl) are NOT in equilibrium?

Na equil-v: Only sodium may cross a membrane separating two compartments. At a temperature of 28∘C, the concentrations of sodium ions are: intracellular: 100 extracellular: 485 What is the equilibrium potential? Give a numeric answer within 1%, in mV.

Answers

The following answers were posted by visitors named B.

a lipid found in cell membranes?

I believe this is what we needed. Thanks so much!

I would like to know if it would be appropriate to write a negative message in a memo form or letter form. what is the different

Jordan is correct, it has a seesaw shape.

Thanks. That helps me understand it a lot more!

how am i supposed to solve it?

i REALLY NEED HELP ABOUT THIS QUESTION. I AM ON THE SAME CLASS

never mind i got it thanks!!!!!!

Solve: -4x < .8 Solution: Using the Multiplication Principle, multiply both sides of the inequality by -.25. Then reverse the signs. -.25(-4x) > -.25(.8) x > -.2

First you have to answer how many clubs are in a deck of 52 cards!! Then you put that number over 52!

When hydrogen and oxygen react together and for the new bonds of h2o, the product is h2o, or water.

I believe that "venons" is correct, using the nous conjugation of the verb.

any help with this would be great. I really don't understand it.

I used: specific heat of 4.184 x 190g which = 794.96 Is that not the correct heat capacity?

the Q is asked is if the shaded area between the cicles is 9picm,and the radius 4cm find the value of X.

a) 20.4085 b) 20.8633

work= force * distance, so you can set up an integral to solve for work F=k*x, k=250 force =250x distance =dx so then you integrate(250x)dx from 0->(5+8)=21,125 idk if its right but its an answer choice

Answer: B. 1.0s later, since the vertical motion is not affected by the horizontal motion

D is my choice!

40 radians/second

thank you very much

What is the volume occupied by 12.3 g or argon gas at a pressure of 1.17 atm and a temperature of 455K?

Thanks Dr. Bob! This really helped.

Is the answer C?

What, does that mean that the answer is D neither?

oh that's cool way to show feelings

The abundance of irregular galaxies across clusters

(Sp Heat)(Change in Temp)(Mass)=

Tut tut, your supposed to do your own MIT exam questions, not ask other to do them for you.

23.4444444444444444

Is a+5 the proper LCD to isolate from the equation in order to obtain -5/2?

density = mass/volume mass = 6.4 grams volume = 28.61 mL - 27.80 mL = 0.81 mL density = 6.4 grams/0.81 mL density of Fe = 7.9 g/mL

Thank you!! I combined the terms when I isolated the LCD and received the following: a^2 +5a - 2a - 10 = 3a^2 + 15a etc..until I received: 2a^2 + 12a + 10 = 0 I wasn't sure what step to complete in order to obtain -5/2 as my final answer.

No idea. But i want to know. Does anyone have an idea??

Thank you! I was just missing the step of multiplying by atomic mass! :)

I know how to get the slope. In my answer key it has the solution of -1\3x +10/3 What i don't get is how they got the +10/3 part

Four ways to determine a plane: 1) two parallel lines 2) two intersecting lines 3) three noncollinear points 4) a line and a point not on the line

Please help I am lost on this one and another one i posted

multiply each measurement by 2.5

35cm by 25cm lol

@DrBob Do 3rd graders know algebra?

I wish I read the book so I could help you...

APA MLA Supposed Their Than (Just took it)

HAHA I need help with that too and i think we are in the same class (*CCH right) PS. posted if you know the answer

the answer to c) and d)

C. Manager B is incorrect in projecting an increased focus on competitive advantage.

I believe Amy tan

Waverlys mother.. She is interacting with... I have to write a quick write but I don't understand it

Thank you so much

$800 - $640 = $160 So you invest $160 for one year and get 4.5 % interest on it. $160 * 1.045 = $167.20 in the bank after one years interst is added.

1. Being educated meant that slaves might question their existence and try to escape. 2.Reading made him understand his situation and thinking about it torments him 3. All of the above. 4. The Declaration of Independence

Inglaterra (England)

So what is the answer?

how to do this question???

Seventy-two and fifty-three thousandths

A bank loaned out $12,000, part of it at the rate of 8% per year and the rest at the rate of 18% per year. If the interest received totaled $1000, how much was loaned at 8%?

James is totally correct!!

2.1 m/s2 is not correct

My answers were 1. What event convinced SC to send representatives to the First Continental Congress? B 2. Which of the following pairs did NOT disagree throughout the colonial period? B 3. Who was elected President of the Continental Congress? D 4. Ameri...

If you are in Connexus they should all be right. I just took the test and got 16/16

bleach is what NaOCl and H2O2 is being titrated with

Here is what I did, but I'm not sure. 1. 10 g / 74.44 g NaOCl = 0.134/0.01 L = 13.4 which is the calculated value for NaOCl 2. 11 g/34.0147 = 0.323/0.011 L = 29.4 M. for the Given value of H2O2. Is this correct?

Which kind of energy Transformation occurs when the skate’s board falls back to the ramp

-21.0 KJ (21.0 KJ lost)

You're three years late bro

alump of lead with mass 0.50...

I’ve been struggling with Algebra and do not understand any of it and it’s after hours and can’t call my teacher.

I’ve been struggling with Algebra and do not understand any of it and it’s after hours and can’t call my teacher.

Thank you so much

Who is right?????? please help!!!!

Thanks guys! Lizard is right, got 100%

Its ACB, guaranteed correct for the unit 4 lesson 2 Monumental sculptures: we remember quick check for connexus

Still not helpful

You only have 17.6ml of NaOH so it is 3.25/17.6 = 0.18