Yahoo Answers is shutting down on May 4th, 2021 (Eastern Time) and beginning April 20th, 2021 (Eastern Time) the Yahoo Answers website will be in read-only mode. There will be no changes to other Yahoo properties or services, or your Yahoo account. You can find more information about the Yahoo Answers shutdown and how to download your data on this help page.
Nutella
Multiple choice: The work of de Brogile and Heisenberg required that the fixed orbits of the Bohr model be replaced with____.?
A: Discrete lines
B: electron clouds
C: Electromagnetic waves
1 AnswerChemistry3 years agoHelp! Chemistry Question!?
Kc=5.75 at 2000 degrees C for the following reaction:
A(s)+B(g)=2C(g)
If the equilibrium concentration [B]=0.25 M, what is the equilibrium of [C]eq?
2 AnswersChemistry3 years agoHelp! Chemistry Question!?
For the gaseous reaction below, the Kp value at 200 degrees celsius is 3.75. The partial pressures at equilibrium are :
.20 atm CO2
0.25 atm H2
0.15 atm H2O
What is the Pco at equilibrium?
CO2+H2=CO+H2O
Chemistry3 years agoHelp! Trig Question!?
A car travels 250 km east, then turns 25 degrees south of east and goes 115km. What is the resultant distance traveled?
Round to the nearest tenth.
4 AnswersMathematics3 years agoTrig help? Multiple choice?
A boat, initially traveling 150 mi/hr 100 degrees east of north, suddenly enters a region where the wind is blowing at 50 mi/hr from the southwest. What is the boats resultant direction?
A: 90.22 degrees
B: 87.09 degrees
C: 9.78 degrees
D: 10 degrees
2 AnswersMathematics3 years agoPlease help! Chemistry question!! What is the osmotic pressure in atm of a 0.50 M urea solution at 25 degrees Celsius?
Assume R=0.08206 L * atm/mol*K
Please help and offer some explanation if you can, I keep getting it wrong and every time I get it wrong I have to watch a 15 minute long video :(
2 AnswersChemistry3 years agoWhat is the freezing point,in Celsius, of a 1.56 m aqueous solution of K3PO4?
Note: Kf for water is 1.86 C/m
1 AnswerChemistry3 years agoCalculate the vapor pressure (in torr) of a 35 degree C solution of ethanol and propanol where the mole fraction of propanol is 0.75.?
Assume ideal behavior.
P ethanol35=100 torr
P propanol35= 36torr
( I had posted this before, but accidentally left out some important information.)
Thank you!
1 AnswerChemistry3 years agoFind cos 2thera if thera is in the first quadrant and tan theta= 40/9.?
Give your answer to the nearest thousandth.
6 AnswersMathematics3 years agoTrig question?
Find the value of sin2*theta if theta is in the fourth quadrant and sin theta =-1/2
4 AnswersMathematics3 years agoCalculate the vapor pressure in torr of a 35 degrees C solution of ethanol and propanol wher the mole fraction=0.75.?
Assume ideal behavior.
P ethanol35=100 torr
P propalol35=36torr
1 AnswerChemistry3 years agoA solution contains two substances, x and y, both volatile components.?
Calculate the vapor pressure in torr of this solution when the mole fraction of x is 0.82. Assume ideal behavior.
Px=320 torr
Py=412 torr
Chemistry3 years agoA solution contains 180 grams of glucose and 500 ml of water at 25 degrees C. What is the vapor pressure of the solution in torr?
( Vapor pressure of pure water at 25 degrees C is 23.8 torr and assume the density of water is 1g/ml )
1 AnswerChemistry3 years agoChemistry Question?
1.5 moles of a solute are added to 2.0 liters of water at 25 degrees C. What is the vapor pressure of the solution in torr?
( Vapor pressure of pure water at 25 degrees C is 23.8 torr and assume the density of water is 1g/ml )
1 AnswerChemistry3 years agoTrig question?
Solve for x when pi/2 <(or equal to) x <)or equal to) 3pi/2
-4cos²(x) + (4√2)sin(x) + 6
2 AnswersMathematics3 years ago-4cos^2*(x)+4*sqrt(2)*sinx+6=0?
1 AnswerMathematics3 years agoTrig Question?
Solve for x when 0<(or equal to) x<(or equal to) pi/2
4 * (sqrt(3)) * (cscx) - 4 -(3csc^2x)=0
3 AnswersMathematics3 years agoAnother trig question?
I'm really wanting to finish my trigonometry class by the time break is over so that I can start taking pre-calc when school starts. However, I just keep running into problems that stump me. Here's one that I'm on right now:
Find x where pi/2 <(or equal to) x <(or equal to) 3pi/2
3tan^2x-8=cos^2x+sin^2x
Enter your answers from smallest to largest, separated by a comma.
Thanks in advance!
4 AnswersMathematics3 years agoQuestion about ball python feeding?
I have been wanting to get a ball python for awhile. I've done countless amounts of research on it, and I know that they have a tendency to be picky eaters. Some people I have watched have had to feed their ball pythons live food because they wouldn't eat anything else. I know that it is often dangerous to feed a snake live food due to the food fighting back, so I really don't ever want to feed live. I know a lot of people who have never had a problem feeding their ball python, but there are also many others that have. I will definitely be buying one from a breeder that has been feeding frozen thawed rodents all of the snake's life if I do choose to get one. My question (finally) is, what are the chances that a ball python that has never eaten live will go on a hunger strike until it gets live?
1 AnswerReptiles3 years ago