Saturday

July 4, 2015

July 4, 2015

Total # Posts: 1,658

**Chemistry**

According to your calculations a reaction should yield 5.67 g of oxygen O2. What do you expect the volume to be at 23 degrees C and 0.985 atm? I got the all the amounts 5.67 g 23 degrees C = 296 K .985 atm And use the ideal gas law Can you help me out by starting it again
*October 23, 2007*

**Chemistry**

P(5.00L)= .446 mol(.0821)(292K) It would look like this right then do I just multiply it all together and divide by the 5.00 L
*October 23, 2007*

**Chemistry**

In an experiment, you fill a heavy walled 5.00 L flask with methane gas, CH4. If the flask contains 7.13g of methane at 19 degrees C, what is the gas pressure. Use the ideal gas law. Can some one help me get started on this problem please
*October 23, 2007*

**Chemistry**

Thanks for all the help DrBob I really appreciate it
*October 23, 2007*

**Chemistry**

Sorry it should be 8.58 * 1.020/ 1.584= Answer: 5.525 m^3 Is that right now
*October 23, 2007*

**Chemistry**

A driving bell is a container open at the bottom. As the bell descends, the water level inside changes so that the pressure inside equals the pressure outside. Intially the volume of air is 8.58m^3 at 1.020 atm and 20 degrees C. What is the volume at 1.584 atm and 20 degrees C...
*October 23, 2007*

**Chemistry**

An experiment called for 4.83 L of sulfur dioxide at 0 degrees C and 1.00 atm. What would be the volume of this gas at 25 degrees C and 1.00 atm? V1= 4.83 L V2= ? T1= 273 K T2= 298 K 1 atm P1 and P2 V2 = V1 * T2/T1 4.83 L * 298 K /273 K = ANSWER: 5.27 L Is this correct.
*October 22, 2007*

**Chemistry**

A mole of gas at 0 degrees C and 760 mmHg occupies 22.41 L. What is the at 20 degrees C and 760 mmHg? T1= 273 K T2= 293 K V1= 22.41 L V2= ? 22.41 L * 293 K/ 273 K = ANSWER: 24.05 L Is this the correct answer
*October 22, 2007*

**Chemistry**

Is this right??
*October 22, 2007*

**Chemistry**

If 456 dm^3 of krypton at 101 kPa and 21 degrees C is compressed into a 27.0 dm^3 tank at the same temperature, what is the pressure of krypton in the tank? V1= 456 dm^3 V2= 27.0 dm^3 P1= 101 kPa P2= ? P2= 101 kPa * 456 dm^3/ 27.0 dm^3 ANSWER: 1705.78 kPa
*October 22, 2007*

**11th grade algebra**

Determine the nature of the roots of this question (1/4)x^2+x+1=0
*September 27, 2007*

**Math**

Determine the nature of the roots of this question (1/4)x^2+x+1=0
*September 27, 2007*

**Science**

Yay! Thanks Liandra!
*September 20, 2007*

**Science**

I need one example of a class one lever that is nothing like scissors (eg. pliers, wire cutters...) and has nothing to do with hammers. Thanks.
*September 20, 2007*

**Not Sure**

Thanks a lot.
*September 7, 2007*

**Not Sure**

What about the bike of yesterday? Like the very first one ever?
*September 7, 2007*

**Not Sure**

What year was the first bike invented in? I can't find that information anywhere.
*September 7, 2007*

**English**

What is the simple subject and simple predicate in the sentence The first movies were different from today's films. I said the simple subject is movies and the simple predicate is were different. I this the correct answer?
*September 6, 2007*

**math**

write equation in standard form. E(-3,-6) and F(-5,-7)
*September 6, 2007*

**sci--check this FINAL ANSWER!**

I would construct the building within 200 m from the side near to the logging area, and I would construct the road across the reserve within 110 m from the side of the deforested pastureland. Constructing the building within 200 m from the side near to the logging area would ...
*August 22, 2007*

**sci**

I would construct the building within 200 m from the side near to the logging area and the road across the reserve within 110 m from the side of the deforested pastureland. This would help reduce the problem of parasitism by the brown-headed cowbirds by separating them from ...
*August 22, 2007*

**sci**

Suppose you are in charge of planning a forest reserve, and one of your main goals is to help sustain locally beleaguered populations of woodland birds. Parasitism by the brown-headed cowbird is an escalating problem in the area. Reading research reports, you note that female ...
*August 22, 2007*

**BIOLOGY**

Suppose you are in charge of planning a forest reserve, and one of your main goals is to help sustain locally beleaguered populations of woodland birds. Parasitism by the brown-headed cowbird is an escalating problem in the area. Reading research reports, you note that female ...
*August 22, 2007*

**science**

how do the moons stay in orbit around jupiter http://www.synapses.co.uk/astro/moon1.html Thanks
*May 7, 2007*

**Physics**

I believe it is as follows: a) x=0 b) y=0 the mag of x would be equal, but in the neg directioin c)x=0 and the mag of x is = to the origional d) all apply except mag of x does not equal 0 as a disclaimer i did not do the math to solve this, but you could use trig to check ...
*May 7, 2007*

**US Gov't**

On what two ground have Presidents base their power of Executive privilege ? http://en.wikipedia.org/wiki/Executive_privilege =)
*April 26, 2007*

**US Gov't**

What are the provisions of the 25th Amendment? http://www.law.cornell.edu/constitution/constitution.amendmentxxv.html It refers to who would succeed whom in case of the removal, resignation, or death of the President. Let us know if you have further questions. =)
*April 25, 2007*

**chemistry**

calculate the empirical formula: 79.8%C and 20.2%H. what os the formula Take a 100 g sample. That will give you 79.8 g C 20.2 g H. convert g to mols. mols = g/molar mass. 79.8/12.01 = 6.64 20.2/1 = 20.2 This gives the formula of C6.64H20.2 However, we know from Dalton's ...
*March 31, 2007*

**economics**

what happens to the united states economy when the gold standard was discontinued? Since this is not my area of expertise, I searched Google under the key words "gold standard economy discontinue" to get these possible sources: http://www.financialsense.com/...
*March 31, 2007*

**Math - PLEASE**

I roll twelve 4-sided dice. What is the probability that I roll at least one 2? What is the probability that I roll exactly three 2s? i dont knowm sorry the same question was answered by Economist at 4:59
*March 29, 2007*

**Math - Statistics**

I roll 12 4-sided dice. What is the probability that I roll at least one 2? What is the probability that I roll exactly three 2s? So i take it, on any give roll, the probability of rolling a 2 is .25 (25%); the probability of rolling something else must be .75 The probability ...
*March 29, 2007*

**science**

For the following crystals, explain how their melting points are related to the bonding forces and the crystal structure. a)Copper,Cu b)Water,H20 c)Sodium chloride,NaCl d)Diamond,C (Broken Link Removed)
*March 25, 2007*

**math**

find all solutions in the interval [0,2 pi) sin(x+(3.14/3) + sin(x- 3.14/3) =1 sin^4 x cos^2 x Since sin (a+b) = sina cosb + cosb sina and sin (a-b) = sina cosb - cosb sina, the first problem can be written 2 sin x cos (pi/3)= sin x The solution to sin x = 1 is x = pi/2 For ...
*March 22, 2007*

**math**

tan (u-v) given sin u=3/4 and cos v= -5/13 with U and V in quadrant 2 Use the identity tan (u-v) = (tanu tanv)/[1-tanu tanv) Get the values of tanu and tanv from the sines and cosines that you are given. For example, if cos v = -5/13, sin v = 12/13 and tan v = -12/5 (in the ...
*March 22, 2007*

**social studies**

what do people who live in mozambique wear on their day to day activities http://www.google.com/search?source=ig&hl=en&q=mozambique There are all kinds of sites to sift through here. If you find nothing, you might try refining the search to mozambique everyday clothing. =)
*March 6, 2007*

**Science**

What is the smallest part of a compound?
*February 20, 2007*

**drugs**

Help! An inhalant is not a stimulant or a depressant. So... what is it then?????? Puh-leaze help me! My grade this term counts on it. What kind of inhalant? We inhale many things -- dust, illegal drugs, legal asthma medications, pollen, etc. Please clarify your question. ...
*February 19, 2007*

**Health (drugs)**

I know that inhalants aren't either a stimulant or a depressant. So what are they? Thank you for using the Jiskha Homework Help Forum. Here is a site from the government explaining inhalants: http://www.nida.nih.gov/Infofacts/Inhalants.html thanks, but I couldn't find ...
*February 19, 2007*

**Gauss' Law!!!!!!!!!!**

Can any one help me for this problem? The cube in Figure 23-27 has edge length 1.40 m and is oriented as shown in a region of uniform electric field. Find the electric flux through the right face for the following electric fields, given in newtons per coulomb. (the figure is ...
*February 14, 2007*

**American Government**

Does it matter if the Federal government or the state governments get to decide if the Federal government exceeded its authority? If yes, how? If the federal government decides if it has exceeded its authority, then obviously it's going to decide that it hasn't. The ...
*February 9, 2007*

**Plz Help Physics**

We know that the negative charge on the electron and the positive charge on the proton are equal. Suppose, however, that these magnitudes differ from each other by 0.00011%. With what force would two copper pennies, placed 1.4 m apart, repel each other? Assume that each coin ...
*February 4, 2007*

**spelling**

you rock people who gave all the answers to me i have to go bye!!!!!!see you next time and i am definently coming back to this awesome website bye!!!!
*January 16, 2007*

**english (especially for Writeacher)**

Lynch, T. (1996). DS9 trials and tribble-ations review. Retrieved October 8, 1997, from Psi Phi: Bradley's Science Fiction Club We b site: h t t p: / /w w w .bradley. edu /campus org/psiphi/DS9/ep/ 503r . html ... and this will go immediately after the quotation or ...
*December 21, 2006*

**english**

How do you cite a website in a paper? I know it is in parentheses, but that is pretty much all I know. citing websites (Broken Link Removed) http://www.jiskha.com/display.cgi?id=1166411079.1166414090 So are you saying I should put all of this: Lynch, T. (1996). DS9 trials and ...
*December 19, 2006*

**Physics**

if ur on about somthing else sorry but there are 1000grams im a killogram
*December 8, 2006*

**science**

these are my homework questions can you answer any???there are 4 1 A pupil placed some magnesium in a gas jar of oxygen How could the rate of reaction between these substances be increased 2 Complete the word equation for the reation magnesium and oxygen 3 How does the colour ...
*November 29, 2006*

**math**

what is an example of a positive corralation using a scatter graph? please help!!!!!!!!!!!!!!!!!!!! I don't know how to place that image in this reply. However, I will try to describe it. If both the abscissa (horizontal or X axis) and the ordinate (vertical or Y axis) ...
*November 29, 2006*

**History**

What problems did the Israelites face when they returned to Canaan? This is a religious, rather than a historic question. Please check your book or the Bible for the answer your teacher expects. As there is no physical historical evidence for Any of the events in the bible, ...
*October 24, 2006*

**music scales**

Hi, I need to play scales for my orchestra grade throughout the year. Is there an online site that has the (actual) scales on it along with the arpeggios? Thank you so much for your help. (The 12 major scales) I think this site will help you with that. http://www.8notes.com/...
*October 19, 2006*

**nucleus true facts**

Wow, BRANDON. You have absolutly NOOOOOOOOOOOOOO LIFE WHAT SO EVER. Ha, little boy. c[:
*October 4, 2006*

**pre-calculus**

pi*(200^2)^2
*October 3, 2006*

**Math**

A train track is 5280ft. long. After adding another foot of track, an arc is created. What is the height of the arc and how would i measure it? FIND THE LEAST COMMON MULTIPLE OF 6,9 The maximum height is given by [2640(5280) + h^2 = [2640(5280) + 0.50]^2^2 making h = 1.94 ft. ...
*September 28, 2006*

**Physics**

A rock is dropped from a height of 100m. a) how long does it take to fall the first 50m? b)How long does it take to fall the last 50m? Which equation would I use to solve this problems with? For a) use s=(1/)g*t^2 where s=50m and g=9.8m/s^2 and solve for t. For b)use s=(1/)g*t...
*September 19, 2006*

**english**

perks of being a wallflower. Does anyone know any symbols in that book? email or respond:
*September 6, 2006*

**math**

Thank goodness for this site! Two questions: first: in the 1990 U.S. census, the final count was 248,709,873 people. The general population is estimated to have been undercounted by 1.8%, that is, only 98.2% of the people were counted. If this were the case, what was the ...
*August 28, 2006*

**World Civilizations**

What evidence suggests that Roman society was more stable during the time of republic than it had been during the time of the empire? http://www.infoplease.com/cgi-bin/id/ipa/A0001206 At the above website, be sure to read the section on Rome before Augustus as well as the ...
*June 29, 2005*

**history**

hey i needinformation on sioux american indiands i need a syte wi everyfin on it b4 2moz :( im gona fail mi project plzhelp These sites have a lot of information about the Sioux nation. http://www.crystalinks.com/sioux.html (Broken Link Removed) tell me about iandiands in the ...
*June 22, 2005*