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December 19, 2014

Search: chemisty

Number of results: 327

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
April 26, 2010 by Andy

Chemisty
explain how you get a decompositin..?
February 8, 2011 by Arcaral

chemisty
balancing equations H2+02=
October 9, 2013 by wasef

Chemisty
Need Boys #'s
October 27, 2014 by Lindsey

Chemisty
why do you use water in calorimeters?
October 1, 2007 by Kelly

chemisty
how many grams are in 5.66 mole of of CaCo3
December 16, 2009 by qualesha

chemisty
(NH4)2SO4 How many atoms
March 9, 2010 by Patti

chemisty
what is the name of this substance K2Cro4
May 2, 2010 by ann

Chemisty
How many V atoms are there in a 26.3 gram sample of V?
February 2, 2012 by love

Chemisty
Full analysis for calcium
March 1, 2013 by Anonymous

chemisty
calculate the H+ for green tea with a pH of 7.9
May 14, 2014 by ashley

Chemisty
How do i convert 0.0024 to scientific notation
January 11, 2010 by Ruth

chemisty
does NF3 follow the octet rule
November 28, 2010 by olivia

Chemisty
What is the electron dot structure of Ethanol?
March 22, 2011 by Shane

clinical chemisty
why is lupus inhibitors important
April 26, 2011 by yr

CHEMISTY
why is but-1-ene a structural isomer of 2-methylpropene?
November 4, 2011 by yukila

chemisty
give the conjugate base for HNO2
November 29, 2011 by melanie

Chemisty
How do you convert 237.7 g/mol to moles?
February 2, 2012 by Eliazbeth

chemisty
how do you convert 50 microliters of 2 butanol to moles?
March 12, 2012 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?
March 16, 2012 by Tracey

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

chemisty
convert 32.9g of neon into moles
December 6, 2014 by Iestyn

chemisty
how many grams of KCL are there in 1200 ml of a 2% KCI solution
January 6, 2010 by shon

Chemisty
The molecular structure around the oxygen in water is....????
February 5, 2010 by SuSu

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

Chemisty
What mass of aluminum is produced by the decompisition of 7.47 kg of Al2O3?
February 26, 2012 by Cheery`

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

CHEMISTY
WHICH HAS THE HIGHER BOILING POINT PENTANE OR HEPTANE
January 14, 2013 by Anonymous

Chemisty
What are the factors that cause the difference between measured pH and calculated pH in titration.
March 3, 2009 by Eunice

chemisty
How many moles of molecules are there in 250 grams of hydrogen nitrate?
January 15, 2010 by mary

chemisty
How much energy is needed to melt a 30.5 g ice cube?
February 23, 2010 by Christopher

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

Chemisty
calculate pH of 50.0 mL of a .100 M solution of the weak monoprotic acid HX
March 29, 2010 by Emily

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

chemisty
balance ___ch3ch2cooh + __o2 yields __co2 + ___h2o
September 12, 2010 by joey

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

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

any tutor
Are there any tutors on right now or people who are good with chemisty?
February 23, 2012 by Anon

Chemisty
How many grams of c6h12o6 are needed to form 7.50g of c2h5oh
March 3, 2012 by Winnie

Chemisty
how many mole of calcium sulfate are in a 100mL of .86M solution?
November 26, 2012 by Riley

organic chemisty
write raction of benzoic acid with propylamine
April 21, 2013 by chemistry

Chemisty
When alkali metals are heated with hydrogen they form--------hydrides
October 16, 2013 by Peter

Organic chemisty
What's the difference between a major and minor product?
November 3, 2014 by Lil

Chemisty
How many litres of water at 100C are vaporized by the addition of 5.00 MJ of heat
November 7, 2014 by Fred

chemisty
convert .98L of N20 gas at STP to moles
December 7, 2014 by Iestyn

chemisty
What would happen if you reacted potassium dicarbonate with HCL and NaOH?
July 22, 2009 by Lena

Chemisty 11 U
Determin the number of oxygen atmos in 1.75kg of potassium sulfate.
April 27, 2010 by Andy

Chemisty 11 U
Determin the number of oxygen atmos in 1.75kg of potassium sulfate.
April 27, 2010 by Andy

Chemisty 11 U
Determin the number of oxygen atmos in 1.75kg of potassium sulfate.
April 27, 2010 by Andy

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

Chemisty
Describe how you would prepare 250 ml of a 0.10M NaCl solution?
November 17, 2010 by Tina

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

Chemisty
what instrument would you use to determine the mass of three apples
January 17, 2012 by love

Chemisty
What instrument would you use to determine the volume of orange juice
January 17, 2012 by love

analytical chemisty
Calculate the pH and pOH of a 0.00002M solution of acetic acid.
September 23, 2012 by mary

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

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

science
when a substance is heated energy is released/ absored. in chemisty this is called an
February 13, 2013 by jomecia

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

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

Chemisty
blanced equation for MgSO4(aq) + BaCl2(aq) describing any precipitaion reaction
June 3, 2014 by Carmen

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

chemisty
what type of reaction occurs when potassium metal reacts with fluorine gas?
November 16, 2009 by Tiffine

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

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

Chemisty
How many milliliters of 5.50 M HCl must be diluted to make 350. mL of a 0.500 M solution?
April 10, 2012 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
February 20, 2013 by mariam

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

Chemisty
What mass of carbon dioxide is formed by the complete combustion of 885g of methanol?
November 9, 2014 by Shatoya

Chemisty
calculate the concentration of the solution of 6.4g calcium sulafte is added to 0.125l of water
December 18, 2014 by EFonts

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
February 17, 2008 by Lauren

chemisty
A bottle labeled 0.150Msulfuric acid contains a solution with what concentration in sulfate ions?
September 27, 2010 by sarah

Chemisty
What is the Net Ionic Equation for the following: a.) NH4Br, NaOH b.) Li2CO3, HClO4 c.)Pb(NO3)2, Kl
May 18, 2011 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?
August 1, 2011 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?
August 1, 2011 by Hannah

Chemisty
How much KNO3 will you have to add to 100 g of water at 40 C to make a saturated solution?
August 1, 2011 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?
September 5, 2012 by Daniel

Chemisty
Write the symbols of the family of elements that have seven electrons in their outermost energy level.
January 16, 2008 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?
July 21, 2008 by Persia

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

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

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

Chemisty
Calculate the standard enthalpy change for the following reaction at 25 C. MgCl2(s)+H2O(l)-->MgO(s)+2HCl
April 1, 2013 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?
April 24, 2013 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
November 2, 2013 by Kiki

Organic Chemisty
How to identify the difference between major and minor products using Markovnikov' rule
November 4, 2014 by Deanne

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?
March 24, 2010 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
October 10, 2011 by Vic

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

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

Chemisty
195 g of water containing magnesium chloride boils at 102.5 celcuis. what mass of salt is needed?
February 24, 2013 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?
April 14, 2013 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?
November 17, 2010 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?
September 20, 2011 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.....
January 6, 2012 by pamela

Chemisty
How many grams of Cl are in 38.0g of CF2Cl2? I really want to figure out how to do it. I can't seem to understand any of this Chem homework and it's getting me frustrated, please help!
September 26, 2014 by Luis

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?
March 1, 2010 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:)
August 20, 2010 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?
April 10, 2012 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
June 6, 2012 by chemistt

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