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January 29, 2015

Search: 14 carat gold has a purity of 58.3%. How many moles of gold are in 154 grams of 14 carat gold? Answer in

Number of results: 56,794

chemistry
the molarity of a solution containing 40 grams of NaOH in 100 ml of solution is
July 13, 2011 by willie

Chemistry
How many grams of NaCl are neeeded to make 100ml of a 2M solution of NaCl
July 13, 2011 by corinna

Chemistry
What is the volume of 4.00 grams of air if the density of air at the time of the measurement is 1.19 g/l?
February 6, 2012 by Lisa

physics help please
How many grams of water at 20.0C are necessary to change 800.0g of water at 90.0C to 50.0C
March 9, 2012 by ******tasha******

Chemistry
To produce 3.00 L of a 1.9 M solution of NaOH, how many grams of NaOH must be dissolved?
April 11, 2012 by Jessica

Chemistry
The molar mass of Cl is 35.45 g/mol. What is the mass of the chloride atom in grams.?
June 20, 2012 by Ray

chemistry
What is the mass in grams of 9.0010^14 iron atoms, each having a mass of 56 { amu}?
September 19, 2012 by BRIANNA

Science
A solution has a density of 3/mL. How many grams are needed to obtain 10.0mL of solution?
September 24, 2012 by Sammi

Science
How many grams of ammonium nitrate is equivalent to 1 gram of calcium nitrate
October 9, 2012 by Bob

chem
An erlenmeyer flask contains 56.7 g of KMnO4. How many grams of manganese is in the flask?
November 29, 2012 by Liam

Chemistry
How many grams of sucrose are needed to make 875 mL of a 39.0% (w/v) sucrose solution?
January 27, 2013 by Chemistry

Chemistry
If 45g of a 2.2% NaHCo3 solution is to be prepared how many grams of NaHCo3 are needed
April 16, 2013 by Karla

chemistry
How many grams of methanol, CH3OH, are there in 150.0 mL of a 0.30 M aqueous solution of methanol
November 4, 2013 by mary

Physics Science
How many grams of water at 20C are necessary to change 800g of water at 90C to 50C?
November 5, 2014 by Ben

Chemistry Physics
How many grams of water at 20C are necessary to change 800g of water at 90C to 50C?
November 5, 2014 by Albert

science
uncertainties for... grams? digital balance cm? minutes? 5 minutes? milliliter (ml)?
December 16, 2014 by Anonymous

Biology
How many grams of glucose are needed to make 500ml of a 3.0M solution of glucose?
January 15, 2015 by Anonymous

Chemistry
Complete the following table for aqueous solutions of caffeine, C8H10O2N4. a) molality b) mass percent solvent c) Ppm solute All we're given is Mole fraction solvent= .900. How do I solve for the other parts with only this?? It XH2O = 0.9, then Xcaffeine=0.1. Suppose we have 0...
March 20, 2007 by Chris

chemistry
How many moles are in 1,000,000,000 molecules of H2O2?
April 20, 2010 by sonisha

Physics
How do I convert 289 kilograms/square meter into grams/square centimeter?
September 19, 2007 by Jane

Physics
Convert 1,953 grams/cubic centimeters into kilograms/cubic meters.
September 19, 2007 by Jane

Chemistry
What is the molarity of a solution containing 20 grams of NaOH in 500 milliliters of solution? a-0.04M b-0.5M c-1M d-2M
March 5, 2008 by John

Chemistry
What is the molarity of a solution containing 20 grams of NaOH in 500 milliliters of solution? a-0.04M b-0.5M c-1M d-2M
March 5, 2008 by Jena

chemistry-stoichiometry
how many grams of chlorine can be liberated from the decomposition of 64.0g of AuCl3 by this reaction 2 AuCl3----> 2 Au + 3cl2
May 19, 2008 by lori

chemistry
How many grams of calcium oxide, CaO, can be produced from 4.20 g of calcium metal and 1.60 g of oxygen gas?
September 21, 2008 by Erika

chemistry
how many grams of water at 0 degree C can be frozen into ice at 0 degree C if 55.0 kJ of heat is removed?
February 1, 2009 by Nelly

chemistry
I need help Calculating the mass of HCL neede to react with 20.0 grams Zn. Zn+HCL -> ZnCl2+H2
February 9, 2009 by Natalie

science
What mass of sodium cholride is produced when chlorine reacts with 0.29 grams of sodium iodide?
April 6, 2009 by Natosha

chemistry
If 6.90 g of (half-life = 5.30 y) are allowed to decay, how many grams would be left after 1.00 y and after 10.0 y?
May 8, 2009 by Kerrie

science
what must be the density of an object with a mass of 5000 grams if the object is to float in water?
January 25, 2010 by John

Chemistry
How many grams of CH3OH must be added to water to prepare 420.0 mL of a solution that is 5.0 M CH3OH?
March 10, 2010 by Camarra

Chemistry
C3H8 + 5O2 3CO2 + 4H2O How many grams of oxygen are required to burn 7.0 g of C3H8?
May 12, 2010 by Chris

chemistry
How many grams of NaOH should be dissolved in 1 litre of solution to prepare a solution with pH value12
June 2, 2010 by sanya

Biochem
10ml of HCl acid titrate with 9.9ml of NaOH. What is the mass in grams of HCl?
August 3, 2010 by Amrik

chemistry
How many grams of cadmium must react to displace 13.0 g of copper from a solution of copper nitrate?
October 12, 2010 by tata

chemistry
How many grams of cadmium must react to displace 13.0 g of copper from a solution of copper nitrate?
October 12, 2010 by tata

Chemistry ( stoichiometry )
How many grams of iron can be made from 16.5g of Fe2O3 by the following equation: Fe2O3 + 3 H2 -----> 2 Fe + 3 H2O.
November 10, 2010 by Sevi

chemistry
How many grams of MgF2 will dissolve in 150. mL of 0.100 M NaF solution? Ksp for MgF2 = 6.4 x 10-9
November 15, 2010 by Audrey

algebra
A piece of cable 8.5 cm long weighs 52 grams. What will a 10-cm length of the same cable weigh?
January 23, 2011 by Anonymous

chemistry
A 25 gram sample of H2O at 37.3C is mixed with 45 grams of H2O at 72.9C. What is the Temperature final of the mixture.
February 16, 2011 by reginajones

Stoichiometry Problems
How many grams of phosphorus can be obtained from the decomposition pf 45kg of POCL3. 2 POCL3 --(> 2P + 3Cl2 + O2
February 27, 2011 by Ray

chemistry
The mass of one penny is 2.51 grams and its volume is 0.40 cubic centimeter. The density in g/ml of this penny is
August 31, 2011 by Anonymous

Chemistry
How many milliters of 0.500 M magnesium nitrate can be produced from the reaction of 35.5 grams of magnesium bromide.
April 3, 2011 by Arlene

chemistry
100 grams of a liquid completely fill a 200 ml bottle. What is the density of the liquid?
April 5, 2011 by Joe

chemistry
A helium atom weighs 6.65 X 10 to the negative 24 grams. How many helium atoms are contained in a 1.0 g sample?
April 16, 2011 by Lindsey

chemistry
what is the number of grams needed to prepare a 1.23 M solution of nitric acid if 250.0 mL are needed?
May 19, 2011 by Anonymous

Science
A jar contains one half of a kilogram of water. How many grams of water does it have?
June 13, 2011 by Abigail

Chemistry
Brass is an alloy that is approximately 67% Cu and 33% Zn, by mass. How many grams of Cu and Zn are in a brass doorknocker weighing 2.2 pounds?
June 17, 2011 by Ippy

chemistry
I need to calculate the amount of grams of Na-benzoate in a Na-benzoate buffer (water based) with a pH = 4.2 at 25'C?
June 22, 2011 by Ele

chemistry
If 10 calories of heat are added to two grams of liquid water what is the temperature of the water
June 26, 2011 by joe

Chemistry
If a sample of K3PO4 is found to contain 1.81 grams of K+ ions, how many PO3- 4 ions are present?
July 31, 2011 by Heather

hw
concentrated sulfuric acid has a density of 1.84 g/ml. calculate the mass in grams of 1.00 liter of this acid. how to solve this?
September 22, 2011 by hw help ASAP

chemistry
concentrated sulfuric acid has a density of 1.84 g/ml. calculate the mass in grams of 1.00 liter of this acid.
September 22, 2011 by ann

chemistry
concentrated sulfuric acid has a density of 1.84 g/ml. calculate the mass in grams of 1.00 liter of this acid.
September 22, 2011 by victor

chemistry thank you
concentrated sulfuric acid has a density of 1.84 g/ml. calculate the mass in grams of 1.00 liter of this acid
September 27, 2011 by grace

Chemistry
What is the mass, in grams, of NaCl formed from the reaction of 2.75 mL of a 6.00 M Na2SO4 solution and 8.30 mL of 2.5 M solution of HCl?
November 23, 2011 by Jane

chemistry
What mass of KNO3 in grams would be required to prepare 0.6 liters of a 1.8 M KNO3 solution?
November 29, 2011 by Megan

chemistry
What is the concentration (m) of a solution that consists of 48 grams of copper (2) acetate dissolved in 645 mL of solution?
December 20, 2011 by Catherine

Ochem
how many grams of NaOCl are in 12.14 mL of a 6.65% (wt./vol.) NaOCl solution? Please help me set this up... I have no idea what to do.
February 1, 2012 by Seerat

chemistry
1.5x10^7 molecules of hydrogen sulfate. find the number of grams for the molecules listed
February 8, 2012 by kate

chemistry
Calculate the mass of solute in a 10% salt solution if the mass of the solvent is 350 grams.
February 22, 2012 by Emmee

chem1151 please help me
If one started will 4.33g of copper(11) chloride , how may grams of copper could be produced?
March 8, 2012 by linda

Physic
If the specific gravity of ice is 0.92, what is the mass of one cubic meter of ice in grams?
March 15, 2012 by Ty

chemistry
determine the energy needed to raise the temperature of 10 grams of H2O from 25 degrees C to 75 degrees C?
May 24, 2012 by tim

chemistry
determine the energy needed to cool 10 grams of H2O from 110 degrees C to -10 degrees C?
May 24, 2012 by tim

CHEMISTRY
HOW MANY GRAMS OF LITHIUM DO YOU NEED TO REACT WITH 2.5 X 10^24 FLUORINE MOLECULES TO PRODUCE LITHIUM FLUORIDE?
May 30, 2012 by LYNSEY

woodlake hills/ science
The car jose is examing has a mass of 25 grams. What is the destiny of the car?
September 27, 2012 by jacob

Chemistry
Show that one mole of KCLO3 contains 122.55 grams. 2 KCLO3(s)->2 KCL(s) + 3 O2(g)
December 5, 2012 by Amy

Physics
what is the number of grams of steam at 100 degrees C that will condense as 5g of ice at 0 degrees C melts?
January 31, 2013 by Hannah

chemistry
in reaction S + O2 -> SO2, determine percent yield if 4 grams of S produced 64 gram of SO2
February 13, 2013 by Fakhry

chemistry
in reaction S + O2 -> SO2, determine percent yield if 4 grams of S produced 64 gram of SO2
February 13, 2013 by Fakhrywik

Chemistry
calculate the energy in joules lost when 70.0 grams of water cools from 86.4 celsius to 7.1 celsius
February 26, 2013 by anon

Chemistry
What mass of sodium oxide is produced from 4.23 grams of sodium and 20 liters of oxygen gas?
April 3, 2013 by Amanda

math
if you have a 4 kg block and divide it into 8 equal blocks. what will be the mass of each block in grams?
April 11, 2013 by nico

chem
What mass of KCl in grams is formed when 2.00 lbs of KC103 is decomposed? KClO3 --> KCl + O2
July 15, 2013 by ren

CHEM
can you show me the formula for this problem. calculate the grams of NaOH present in 9.0 ml of a 8.0 (m/v) NaOH solution. thank you
March 25, 2014 by julia

Chemistry
To prepare 100g of 19.7% by weight solution of NaOH.how many grams each of NaOH and H2O are needed?
June 21, 2014 by akhmal

Maths
A 5kg bag of apples costs R65 what is the cost of 500 grams of apples
August 7, 2014 by T1

Chemistry
The density of ethanol is 0.789g/cm3 at 20 degreesC. What volume of ethanol has a mass of 15.5 grams?
October 28, 2014 by tmccloud

Science
How many grams of CH3SH must be added to water to prepare 410mL of a solution that is 2.5 M CH3SH?
November 4, 2014 by Eli

Chemistry
How many grams of chlorine gas are needed to make 5.40 x 10 6 g or a solution that is 1.40 ppm chlorine by mass?
November 5, 2014 by Dustin

chem
When Mg reacts with HCl, it produces MgCl2 and H2(g). If 2.34 g of Mg react, how much MgCl2 is produced (in grams)?
December 13, 2014 by bekah

Calculus
Hi. How can I integrate 1/(X^3 +1) ? Thank you to anyone who can help me :-) Write 1/(x^3 +1) as 1/[(x+1)(x^2-x+1)] Then use integration by parts, letting dv = dx/(x^2 -x +1) u = 1/(x+1) du = log (x+1) v = (2/sqrt3)arctan[(2x-1)/sqrt3] That should take you to the answer. I ...
March 18, 2007 by M

chemistry
Analysis of aluminum-zinc alloy Mass of gelatin capsule 0.1284 g ambient temp. 22c mass of capsule plus alloy sample 0.3432g ambient temp_________K mass of alloy sample, m__________g barometric pressure 745 mm Hg mass of empty beaker 144.5g Vapor pressure at H2O at ...
June 19, 2013 by niki

chemistry
If 2.1 moles of CaCl2 are dissolved in enough water to make a 0.92-liter solution, what is the resulting molarity? 0.44 M CaCl2 0.70 M CaCl2 2.3 M CaCl2 3.0 M CaCl2
November 7, 2010 by smith

statistics
M&M plain candies have weights that are normally distrbuted with a mean weight of 0.8565 gram and a standard deviation of 0.0518 gram. A random sample of 100 M&M candies is obtained from a package containing 465 candies: the package label states that the net weight is 396.9 ...
July 19, 2010 by cindy

CHEMISTRY (WEBWORK)
SPARTAN: Answer the follow using the Energy Profile plot. More than one answer is possible for some questions. What chemical species are present... A. at the longest constraint distance? _____ (Use i, ii, iv, etc. for your answer) B. at the highest energy?_____ (Use i, ii, iv...
July 19, 2010 by arthur

Chemistry
Complete combustion of 7.70 g of a hydrocarbon produced 23.7 g of CO2 and 10.9 of H2O. What is the empirical formula of the hydrocarbon? I first calculated the moles of both the carbon dioxide and the water, but I have no idea where to go from there. Any assistance would be ...
January 27, 2011 by Student

Chemistry
If 10.4 mols of hydrogen, H2, and 9.1 mols of oxygen, O2, are placed together in a container and allowed to react according to the following equation, which one, if any, is in excess and by how much? Also, how many moles of water, H2O, would be produced by the reaction?
May 5, 2011 by Loren

chemistry
calculate the molar mass of an unknown whose mass was 0.846 g, and occupied a volume of 354 cm3 at a pressure of 752 torr and a temperature of 100 degrees celcius. I came up with .0114 moles, I want to know if this is correct.
July 13, 2011 by Carla

chemistry
A sample of hydrogen gas was collected over water at 36C and 855 mmHg. The volume of the container was 6.50 L. Calculate the number of moles of H2 collected. (Vapor pressure of water is 44.6 torr at 36C)
August 15, 2009 by jeff

Chemistry
Magnesium fluoride dissolves in water to the extent of 8.0 10-2 g/L at 25C. Calculate the solubility of MgF2(s) in moles per liter, and calculate Ksp for MgF2 at 25C. I've been doing this and getting .086. Please help!
May 26, 2010 by Kate

Chemistry
in a blast furnace, iron(III) oxide is used to produce iron by the following (unbalanced) reaction: Fe2O3 + CO = Fe + CO2 a. if 4 kg Fe2O3 are available to react, how many moles of CO are needed?
May 18, 2012 by RS

Chimestry
(The reaction of calcium hydride and water produces calcium hydroxide and hydrogen as products). How many moles of H_2(g) will be formed in the reaction between 0.90mol CaH_2(s) and 1.33mol H_2O(l)?
September 11, 2012 by Inni

Chemistry
10. When a 5.00 mL sample of vinegar is titrated, 44.5 mLof 0.100 M NaOH solution is required to reach the end point. What is the concentration of vinegar in moles per liter of solution (molarity, M)?
November 25, 2012 by Anonymous

Chem
What is the molarity (M) of an HCl solution, 150 ml of which when treated with excess magnesium liberates 3.5 l of H2 gas measured at STP? I know molarity is Moles, volume, but how does magnesium come into play?
April 17, 2013 by Johnie HELPPPPP

Chemistry
In neutralization reactions, acid + base salt + water HCl can be neutralized with NaOH. How many moles of NaOH will it take to neutralize 0.68 L of 0.29 M HCl? Is there a formula that I need to use here?
March 11, 2014 by Sara

chemistry - synthesis of aspirin
I wanted to calculate the theoretical and actual yield of aspirin. mass of salicylic acid = 2.005 g But isn't salicylic acid differ. from acetic acid? If so, how do we find the mass of acetic acid in this experiment volume of acetic anhydride = 4 ml mass of acetic anhydride (...
April 6, 2012 by Priscilla

chemistry 2
The pH of a Ba(OH)2 solution is 10.66. What is the hydroxide concentration? If the solution volume is 125ml, how many grams of Ba(OH)2 have been dissolved?
April 18, 2008 by ralph

chem
If 1.2 grams of sodium are reacted with 4.00 mL water, how much NaOH is produced? density of water= 1.00g/mL
September 21, 2009 by Andy

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