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April 24, 2014

Search: Chemisty/Physic

Number of results: 1,072

Chemisty/Physic
How can I find the pipe diameter when given the velocity = 1 m/s and the volumetric flow rate = 6000 m^3/day and flow area = 6000 m^2/s So that everything cancels leaving me with meters so I can write my answer in cm.
Thursday, September 13, 2012 at 4:27pm by Angie

Chemisty 11
Why is it important to use the correct salt-sand mix on highways during storms? Help please this is for my Chemisty Project
Monday, April 26, 2010 at 9:21pm by Andy

physic
indentify at least two ereas of physic involved in the following: a) building a louder stereo system in your car b)bungee jumping c)judging how hot an slectric stove burner is by looking at it. d) cooling off on a hot day by diving into a swimming pool.
Sunday, February 20, 2011 at 3:02am by nancy

Physic
Type A nerve fibers in humans can conduct nerve impulses at speeds up to 139.8 m/s. How fast is this in mph? This is a question from my physic homework. I have tried converting 139.8 m/s to mile then to hrs and i got .000241 mph. When I input it it said this is not correct. ...
Sunday, August 26, 2012 at 9:22pm by David

College Physic
I am having problem with this one physic problem. I am not sure where to start can someone help me? Thank You! A 15.0 kg box falls out of an Jet at an altitude of 3000 meters. It reaches a terminal speed of 50 meters per second in 3.20 seconds. Calculate the force of air ...
Wednesday, September 26, 2012 at 7:44pm by Monet Nguyen

Chemisty
explain how you get a decompositin..?
Tuesday, February 8, 2011 at 10:32am by Arcaral

chemisty
balancing equations H2+02=
Wednesday, October 9, 2013 at 12:53pm by wasef

Chemisty
why do you use water in calorimeters?
Monday, October 1, 2007 at 5:42pm by Kelly

chemisty
how many grams are in 5.66 mole of of CaCo3
Wednesday, December 16, 2009 at 12:10pm by qualesha

chemisty
(NH4)2SO4 How many atoms
Tuesday, March 9, 2010 at 8:20pm by Patti

chemisty
what is the name of this substance K2Cro4
Sunday, May 2, 2010 at 1:32pm by ann

Chemisty
How many V atoms are there in a 26.3 gram sample of V?
Thursday, February 2, 2012 at 6:26pm by love

Chemisty
Full analysis for calcium
Friday, March 1, 2013 at 1:24pm by Anonymous

Chemisty
How do i convert 0.0024 to scientific notation
Monday, January 11, 2010 at 4:45pm by Ruth

chemisty
does NF3 follow the octet rule
Sunday, November 28, 2010 at 6:58pm by olivia

Chemisty
What is the electron dot structure of Ethanol?
Tuesday, March 22, 2011 at 12:50am by Shane

clinical chemisty
why is lupus inhibitors important
Tuesday, April 26, 2011 at 8:39pm by yr

CHEMISTY
why is but-1-ene a structural isomer of 2-methylpropene?
Friday, November 4, 2011 at 8:43am by yukila

chemisty
give the conjugate base for HNO2
Tuesday, November 29, 2011 at 1:47am by melanie

Chemisty
How do you convert 237.7 g/mol to moles?
Thursday, February 2, 2012 at 9:26pm by Eliazbeth

chemisty
how do you convert 50 microliters of 2 butanol to moles?
Monday, March 12, 2012 at 9:49pm by jessica

Chemisty
If 59.0 mL of 0.40 M HI is mixed with 100. mL of 0.10 M KOH what is the resulting pH?
Friday, March 16, 2012 at 1:30pm by Tracey

chemisty
How many moles of Ba(OH)2 are present in 295mL of 0.800M Ba(OH)2?
Monday, August 6, 2012 at 7:06pm by LL

chemisty
how many grams of KCL are there in 1200 ml of a 2% KCI solution
Wednesday, January 6, 2010 at 12:21pm by shon

Chemisty
The molecular structure around the oxygen in water is....????
Friday, February 5, 2010 at 1:36am by SuSu

Chemisty
A 5M solution is diluted 1/10 and again 1/5. What is the concentration of each dilution?
Sunday, October 31, 2010 at 12:55pm by T

Chemisty
What mass of aluminum is produced by the decompisition of 7.47 kg of Al2O3?
Sunday, February 26, 2012 at 10:49pm by Cheery`

chemisty
What is the approximate mass of 2L of C4H10 gas at STP?
Thursday, November 29, 2012 at 4:21pm by karen

CHEMISTY
WHICH HAS THE HIGHER BOILING POINT PENTANE OR HEPTANE
Monday, January 14, 2013 at 12:27pm by Anonymous

Chemisty
What are the factors that cause the difference between measured pH and calculated pH in titration.
Tuesday, March 3, 2009 at 12:43pm by Eunice

chemisty
How many moles of molecules are there in 250 grams of hydrogen nitrate?
Friday, January 15, 2010 at 9:59am by mary

chemisty
How much energy is needed to melt a 30.5 g ice cube?
Tuesday, February 23, 2010 at 5:17pm by Christopher

Chemisty
In which cases are higher-energy photons released, with Li+ or Cu2+? How do you know?
Tuesday, March 9, 2010 at 2:57pm by student

Chemisty
calculate pH of 50.0 mL of a .100 M solution of the weak monoprotic acid HX
Monday, March 29, 2010 at 3:58pm by Emily

Chemisty (Sig Figs)
79.7 + 890.43 - 23 = 9.5 e2 its wrong and I am suppose to correct it.
Monday, August 23, 2010 at 7:06pm by Hannah

chemisty
balance ___ch3ch2cooh + __o2 yields __co2 + ___h2o
Sunday, September 12, 2010 at 9:49pm by joey

Science (Chemisty)
Why do you never find liquid bromine in your neighborhood?
Monday, October 25, 2010 at 8:25pm by Jeremiah

Chemisty
How would you classify a solution of NaCl at 35.9 g/100 g of water at 20 C?
Monday, August 1, 2011 at 3:28pm by Hannah

any tutor
Are there any tutors on right now or people who are good with chemisty?
Thursday, February 23, 2012 at 9:59pm by Anon

Chemisty
How many grams of c6h12o6 are needed to form 7.50g of c2h5oh
Saturday, March 3, 2012 at 3:15pm by Winnie

Chemisty
how many mole of calcium sulfate are in a 100mL of .86M solution?
Monday, November 26, 2012 at 7:37pm by Riley

organic chemisty
write raction of benzoic acid with propylamine
Sunday, April 21, 2013 at 10:05am by chemistry

Chemisty
When alkali metals are heated with hydrogen they form--------hydrides
Wednesday, October 16, 2013 at 3:11pm by Peter

chemisty
What would happen if you reacted potassium dicarbonate with HCL and NaOH?
Wednesday, July 22, 2009 at 12:18am by Lena

Chemisty 11 U
Determin the number of oxygen atmos in 1.75kg of potassium sulfate.
Tuesday, April 27, 2010 at 8:54pm by Andy

Chemisty 11 U
Determin the number of oxygen atmos in 1.75kg of potassium sulfate.
Tuesday, April 27, 2010 at 8:57pm by Andy

Chemisty 11 U
Determin the number of oxygen atmos in 1.75kg of potassium sulfate.
Tuesday, April 27, 2010 at 8:59pm by Andy

chemisty
What mass of iodine contains the same number of atoms at 25.0 g of chlorine?
Wednesday, September 15, 2010 at 8:13am by Anonymous

Chemisty
Describe how you would prepare 250 ml of a 0.10M NaCl solution?
Wednesday, November 17, 2010 at 10:29am by Tina

chemisty
how many grams of magnesium sulfate are required to make 575 ml of a 1.65% (m/v) solution
Monday, March 7, 2011 at 7:03pm by jess

Chemisty
what instrument would you use to determine the mass of three apples
Tuesday, January 17, 2012 at 8:25pm by love

Chemisty
What instrument would you use to determine the volume of orange juice
Tuesday, January 17, 2012 at 8:29pm by love

analytical chemisty
Calculate the pH and pOH of a 0.00002M solution of acetic acid.
Sunday, September 23, 2012 at 10:14pm by mary

chemisty 2
Calculate the molarity (M) of a solution if you have 0.34 mol of NaOH in 19 ml of water
Tuesday, October 23, 2012 at 10:13am by chris

Analytical chemisty
How many grams of K2Cr2O7 are required to prepare 500 ml of a 0.13 N solution?
Saturday, February 2, 2013 at 7:33pm by Anonymous

science
when a substance is heated energy is released/ absored. in chemisty this is called an
Wednesday, February 13, 2013 at 11:01am by jomecia

Chemisty
250g of water containing sucrose freezes at -3.5C. What is the molality of the solution?
Sunday, February 24, 2013 at 6:52pm by Jared

chemisty
what volume will be occupied by 3.25mol of oxygen gas at 735mmhg and 25celcius?
Monday, April 8, 2013 at 7:17pm by raw

chemisty
Calculate the density of oxygen,O2 , under each of the following conditions: 1- STP 2- 1.00 atm and 35.0 C
Wednesday, October 8, 2008 at 9:35pm by unknown

chemisty
what type of reaction occurs when potassium metal reacts with fluorine gas?
Monday, November 16, 2009 at 1:48pm by Tiffine

chemisty
how many grams of Na are needed to react with H2O to liberate 400mL of H2 gas at STP?
Wednesday, December 8, 2010 at 3:04pm by justin

chemisty
calculate the molarity of a solution with .2 moles of sodim hydroxide dissolved in .5L of water
Wednesday, April 27, 2011 at 9:32am by Anonymous

Chemisty
How many milliliters of 5.50 M HCl must be diluted to make 350. mL of a 0.500 M solution?
Tuesday, April 10, 2012 at 6:34pm by Wyatt

chemisty
What is the density of a 17.12 g object if the dimensions of the block are: length = 12.6 mm height = 9.82 cm width = 0.0140 m
Wednesday, February 20, 2013 at 3:00pm by mariam

chemisty
Calculate the volume of 4.0ml of nitogen gas at 754mmhg and 25 degrees celcius
Monday, April 8, 2013 at 5:56pm by zane

Chemisty
What is the molecularity of each of the following elementary reactions? A. O+O2+N2----> O3+N2+ B. NO2Cl + Cl---> NO2 + Cl2 C. Cl + H2 ---> HCl + H D. CS2----> CS + S
Sunday, February 17, 2008 at 6:58pm by Lauren

chemisty
A bottle labeled 0.150Msulfuric acid contains a solution with what concentration in sulfate ions?
Monday, September 27, 2010 at 9:37pm by sarah

Chemisty
What is the Net Ionic Equation for the following: a.) NH4Br, NaOH b.) Li2CO3, HClO4 c.)Pb(NO3)2, Kl
Wednesday, May 18, 2011 at 12:40am by Jessica

Chemisty
In terms of saturation, how would you classify a KBr solution with a concentration of 78 g/100 g of water at 47C?
Monday, August 1, 2011 at 3:10pm by Hannah

Chemisty
In terms of saturation, how would you classify a KBr solution with a concentration of 78 g/100 g of water at 47C?
Monday, August 1, 2011 at 3:13pm by Hannah

Chemisty
How much KNO3 will you have to add to 100 g of water at 40 C to make a saturated solution?
Monday, August 1, 2011 at 3:28pm by Hannah

Chemisty
How many moles of H2PO4 and HPO4 would be needed to prepare 1.0 L of a 0.01M phosphate buffer with a pH of 6.82?
Wednesday, September 5, 2012 at 8:41pm by Daniel

Chemisty
Write the symbols of the family of elements that have seven electrons in their outermost energy level.
Wednesday, January 16, 2008 at 6:39pm by M

CHEMISTY
WHAT IS THE MOLARITY OF A SOLUTION PREPARED BY DISSLOVING 4.92 GRAMS OF CALCIUM NITRATE, Ca(NO3)2 in 250 mL OF WATER?
Monday, July 21, 2008 at 10:22pm by Persia

chemisty
How many moles of carbon monoxide form at the same time that 0.337 mol CS2 forms?
Tuesday, May 4, 2010 at 5:12pm by jake callienf

Chemisty
Calculate the energy in radiation of wavelength 550 nm carried by 1) one photon 2) 1 mol of photons
Tuesday, September 6, 2011 at 1:17am by Grace

Chemisty
Calculate the energy in radiation of wavelength 550 nm carried by 1) one photon 2) 1 mol of photons
Tuesday, September 6, 2011 at 1:23am by Grace

Chemisty
Calculate the standard enthalpy change for the following reaction at 25 C. MgCl2(s)+H2O(l)-->MgO(s)+2HCl
Monday, April 1, 2013 at 8:00pm by Orton

Chemisty
if 1.00 g of silver nitrate is combined with 1.00g of sodium chloride what is the mass of the solid if you have 75% yield?
Wednesday, April 24, 2013 at 10:06am by El

Chemisty
At STP 4 liters of O2 contains the same total number of molecules as 1L of NH3 2L of Cl2 8L of He 4L of CO2
Saturday, November 2, 2013 at 5:27pm by Kiki

AP Physic
Hi there I am having so much problems trying to solve this physic problem and I really need help. Please give me a big hint on how to find the amplitude of this problem because i tried using everything i know and i cannot figure it out. This homework problem deals with wave ...
Sunday, January 17, 2010 at 9:23am by shylo

Chemisty/Bio
Is a environment that is hypoxic or anoxic the same as acidic?? I am a little confused how the two relate to each other?
Wednesday, March 24, 2010 at 4:25am by Mark

Chemisty
Calculate the % error of an experiement if a student obtained a destiny of 1.23g/ml(predicted) and the actual value was 1.30g/ml
Monday, October 10, 2011 at 12:06am by Vic

Chemisty
Classify the following: 1)CH3CHCH2COOH ! CH3 I think this is a carboxylic acid because of the COOH attached. Would you agree?
Wednesday, September 12, 2012 at 10:15pm by Hannah

Ap Chemisty
If .237 mol of ammonia react with 56g of iodine, how much Nitrogen triiodid, in grams, is produced?
Wednesday, October 24, 2012 at 10:33pm by Kelsey

Chemisty
195 g of water containing magnesium chloride boils at 102.5 celcuis. what mass of salt is needed?
Sunday, February 24, 2013 at 6:58pm by Jared

chemisty
how many grams of sucrose must be dissolved in 1.5kg of water ot produce a solution which has a freezing point of -2.40 degrees C?
Sunday, April 14, 2013 at 4:51pm by Joan

Chemisty
Nitric acid is abailable commercially at a concentration of 16M. What volume would you use to prepare 750 ml of a 0.20 M solution?
Wednesday, November 17, 2010 at 9:52am by Julie

Chemisty
Consider a hydrogen atom that goes from the n = 2 to the n = 1 state. (a) Calculate the wavelength, in nm, of the photon emitted. (b) What part of the electromagnetic spectrum is it?
Tuesday, September 20, 2011 at 8:28pm by Pamela

chemisty
14KMnO4+4C3H5(OH)3----->7K2CO3+7Mn2O3+5CO3+16H2O how to do it help me if you can I spend days to find this but I couldnt please help mee.....
Friday, January 6, 2012 at 7:42pm by pamela

chemisty
what is the final pH after 1 drop(.05ml) of 6M HCl is added to 1.0L of freshly prepared pure water that was originally at a pH of 7.0. Is there a signigicant pH change?
Monday, March 1, 2010 at 6:30pm by tiffany

Chemisty (Sig Figs)
so i am terrible at this. Round each number to 3 significant numbers. Can you explain? 1. 9845.42800 2. 1.548937675e12 3. 10.7771777425 4. 0.000045875 thanks:)
Friday, August 20, 2010 at 7:39pm by Rebekah

Chemisty
25.0 mL of 0.250 M MgCl is transferred to a 300.0 mL volumetric flask and diluted to the mark with deionized water. What is the concentration of the dilute solution?
Tuesday, April 10, 2012 at 6:36pm by Wyatt

chemisty
when 2.75 mol HI(g) placed in 1L container and allowed to dissociate into 2HI(g) <==> H2(g)+I2(g) Final H2 concin .275M. What is Ka for rxn The answer is .0156. But I don't know why Thanks
Wednesday, June 6, 2012 at 8:59pm by chemistt

Chemisty
0.550 L of 0.420 M H2SO4 is mixed with 0.500 L of 0.270 M KOH. What concentration of sulfuric acid remains after neutralization?
Monday, January 14, 2013 at 5:10pm by Paul

Chemisty
How many grams of sodium bicarbonate mut be decomposed by: HCl (ag) + NaHCO3 (ag) ----> NaCl (ag) + CO2 (g) + H2O (l) to yield 75.0 mL of carbon dioxide at STP?
Saturday, April 23, 2011 at 2:13pm by Adele

physic
what is thermometer
Tuesday, February 14, 2012 at 3:41am by shaka

physic
what is a wave?
Tuesday, April 2, 2013 at 1:00am by alax

chemisty
Consider the titration of 50 mL of 0.15 M NH3 with 0.1 M HCl. What is the pH at the equivalence point of the titration? (Kb= 1.8X 10-5 Ka= 5.6X10-10)
Friday, December 7, 2007 at 6:33pm by bert

Chemisty
Determine how many calories are need to heat 30 grams of water from 10 degrees C to 30 degrees C
Wednesday, January 30, 2013 at 8:21pm by Ali

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