Sunday
December 21, 2014

Search: Chmistry

Number of results: 25

chmistry
iron+oxygen
September 25, 2010 by Anonymous

chmistry
if the %T for a sample is 80 at 50nm, what is the value of A
February 1, 2011 by bilkisu

chmistry
if the %T for a sample is 80 at 50nm, what is the value of A
February 1, 2011 by bilkisu

chmistry
what substance has the density of .60g/ml
October 11, 2011 by james

Chmistry
what numerical values of l are possible for n=4
November 1, 2012 by daphney

Chmistry
calculate the molar mass of the compound (K S 0 4 .1 2 H 2 0 )
October 15, 2014 by brown

chemistry
hey can u tell that who invented chmistry and is this subj is conceptual or not?
December 6, 2009 by gulraizkhan

Chmistry
What is the volume of a cube that has the following measurements (length 20.0 cm, width 152 mm, height 0.458 m)
September 10, 2014 by keisha

chmistry
Given that \rm S is the central atom, draw a Lewis structure of \rm OSF_4 in which the formal charges of all atoms are zero.
May 14, 2013 by Papayu Domu

chmistry
balance each of the following chemical equations ,using the change in oxidation number method. cu +h2so4=cuso4+so2+h2o
February 14, 2013 by bb

chmistry
the volume of a sample of helium is 4.5ml at 20.0c and 203.0kpa. what will its volume be in the figure?
April 11, 2012 by Anonymous

chmistry
A 4.98 g sample of aniline (C6H5NH2, molar mass = 93.13 g/mol) was combusted in a bomb calorimeter with a heat capacity of 4.25 kJ/C. If the temperature rose from 29.5C to 69.8C, determine the value of ΔHcomb for aniline.
June 18, 2013 by love

chmistry
3O2(g)---> 2O3(g) Delta H = +284.6 kJ what is the sign of delta G and delta S
February 5, 2013 by bb

Chmistry
28.31 mL of O2(g) at 1.00 atm pressure dissolve in 1.00 L of water at 25.0 C. If the pressure of O2(g) is raised to 3.86 atm what will the new concentration of oxygen be expressed in mol/L
December 1, 2012 by Anonymous

Chmistry
A sample of copper with a mass of 63.5g contains 6.02x10^23atoms.Calculate the mass of a single copper atom.
October 11, 2010 by Janie

chmistry
You run out of brown sugar and decide to use 1.5 cups granulated sugar instead. The cookies come out much thinner than usual. Formulate a one-sentence hypothesis for why the recipe failed.
November 13, 2013 by Anonymous

chmistry
a aqueous solution of hydrochloric acid has concentration of 37. wt % convert in concentration value to molar concentration if the density of the solution is 1.19g/ml molar mass of Hcl=36.46g/mol t
March 17, 2014 by dahat

Chmistry
Any object, be it a space satellite or a molecule, must attain an initial upward velocity of at least 11.2 km/s in order to escape the gravitational attraction of the earth. What would be the kinetic energy in joules of a satellite weighing 2337 lb that has the speed equal to ...
June 7, 2011 by Lance

chmistry
gunpowder is a mixture of potassium nitrate , sulfur and carbon in th proportion (by mass) of 6:1:1 (KNO3;S:C). A typical riflr shell contains 3.2 gunpowder. How many moles of each compnent are there in our sample gunpowder? KNO3 mole: C: mol S: mol Thank you for helping!!
October 27, 2009 by Brittany

chmistry
Compound: Concentration: Measured deltaT LiCl 6.00 g/kg 0.492 deg C HCl 4.00 g/kg 0.389 deg C NaCl 6.00 g/kg 0.356 deg C Determine the value of the vant hoff factor for each salt for the experimentally measured delta T value. (kf=1.86) I have tried to figure this out, but it ...
September 14, 2012 by Brunette

chmistry
a solutiona solution is made by dissolving 3.75g of a pure nonvolatile solute in 95g of acetone. the boiling point of pure acetone was observed to be 55.95 Centigrade that,and that of the solution was 56.50 Centigrade.if the molar boiling point elevation constant(Kb)of acetone...
November 20, 2012 by bb

chmistry
When 0.633 g of Ca metal is added to 200.0 mL of 0.500 M HCl(aq), a temperature increase of 103C is observed. Assume the solution's final volume is 200.0 mL, the density is 1.00 g/mL, and the heat capacity is 4.184 J/gC. (Note: Pay attention to significant figures. Do not ...
February 12, 2007 by alexis

Chmistry
For the following reaction, 4.35 grams of hydrogen gas are allowed to react with with 10.3 grams of ethylene (C2H4). hydrogen (g) + ethylene (C2H4) (g) ethane (C2H6) (g) What is the maximum amount of ethane (C2H6) that can be formed? grams What is the FORMULA for the limiting ...
December 4, 2010 by Austin Jekins

Chmistry
For the following reaction, 4.35 grams of hydrogen gas are allowed to react with with 10.3 grams of ethylene (C2H4). hydrogen (g) + ethylene (C2H4) (g) ethane (C2H6) (g) What is the maximum amount of ethane (C2H6) that can be formed? grams What is the FORMULA for the limiting ...
December 4, 2010 by Austin Jekins

Chmistry
Sodium metal dissolves in liquid mercury to form a solution called a sodium amalgam. The densities of Na(s) and Hg(l) are 0.97 g/cm3 and 13.6 g/cm3, respectively. A sodium amalgam is made by dissolving 1.0 cm3 Na(s) in 20.0 cm3 Hg(l). Assume that the final volume of the ...
December 13, 2011 by bernan

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