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March 26, 2017

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Number of results: 8,562

Chemistry 2
A solution of NaOH (aq) contains 8.2 grams of NaOH(s) per 100.0 mL of solution. Calcualte Ph and POH at 25 degrees celsiuis
February 21, 2014 by Jason

Science(chemistry)
how much energy is needed to change 53 grams of water from -53 degrees celsius to 160 degrees celsius ?
April 30, 2014 by Mohamed

chemistry
How many grams of sodium hydroxide (NaOH) are needed to prepare 250 mL of a 0.20 M (mol/dm3) sodium hydroxide solution?
May 5, 2014 by pippiserra

Math
How many grams of Ag2S react to form 174 g of AgCl? see below: Ag2S + 2 HCl ==> 2 AgCl + H2S
May 17, 2014 by Daniel Macombson

Science
What is the mass percent of sodium hydroxide in a solution that is made by dissolving 8grams of sodium hydroxide in 50 grams of H2O?
July 7, 2014 by Araceli

science
what is the weight of the ethyl alcohol that exactly fills a 200.00 ml container? The density of ethyl alcohol is 0.789 grams/ml
September 9, 2014 by dylan

math
A metal sphere has a mass of 1 kg. 1 cubic centimeter of this metal has a mass of 4.8 grams. find the radius. how do you work this out?
September 22, 2014 by maya

Chemistry
How many grams of sodium carbonate are in a sodium carbonate sample that contains 1.773x10^17 carbon atoms? How do I work this out?
September 22, 2014 by Sam

Chemistry
Assuming an element's half-life is 3.6 years. How much of 2 grams of the element would remain after 10.8 years?
October 24, 2014 by Chandler

Chemistry
For the reaction CaCO3(s)+ 2HCl(aq)= CaCl2(aq)+ CO2(g)+ H2O(l) how many grams of CaCl2 can be obtained if 14.6 g HCl is allowed in CaCO3?
November 24, 2014 by Lita

chemistry
Iron and oxygen gas can react to form the magnetic oxide of iron Fe3O4. How many grams of Fe3O4 can be made from 13.2 g of O2?
December 8, 2014 by dave

science
for every cubic meter of 30 degrees celsius saturated coded to 16 degrees celsius fowmany grams lost
January 27, 2015 by vince

chemistry
An aqueous solution contains 64g of ethanol( C2H5OH) in 122 grams of solution. The mole fraction of ethanol is:
March 15, 2015 by anon

Chemistry
A flask contains 25.0 mL of diethyl ether weighth 18.74 µg (micrograms). What is the density of the diethyl ether and grams per liter?
May 1, 2015 by Sara

PHYSICS
CALCULATE THE ENERGY PRESSURE WHEN 20 GRAMS OF STEAM AT 100 DEGREES CELSIUS COOLS TO ICE AT-20 DEGREES CELSIUS.
September 30, 2015 by ROJAI

science
If the solution is saturated at 100 degrees Celsius and then cooled to 30 degrees Celsius, how many grams of solute will precipitate out?
October 26, 2015 by Troy

Science
How much graphite carbon must be burned in oxygen gas to produce 2.2 grams of carbon dioxide gas
November 27, 2015 by Isaac

Chemistry
1.How Many Grams Of Sulphur Contains The Same Number Of Moles As 4.6g Of Sodium? 2.Calculate The Number Of Moles In 28.6g Of Na2CO3.10H2O?
January 21, 2016 by Saich

Physics 110
How much energy is needed to raise 500 grams of water from 10 degrees Celsius to 40 degrees Celsius?
March 28, 2016 by Jennifer

chemistry
Given the balanced equation: 2 Al + Fe2O3 → Al2O3 + 2 Fe how many grams of Al2O3 will be produced if 68.1 g Al reacts with 112 g Fe2O3?
March 31, 2016 by Winter

Chemistry
Iron and oxygen gas can react to form the magnetic oxide of iron Fe3O4. How many grams of Fe3O4 can be made from 42.3 g of Fe?
May 3, 2016 by Jenny

Chemistry
3 Cl2 + 6 KOH go to KClO3 + 5 KCl + 3 H2O how many moles of KClO3 form when 2 grams of KOH react completely
June 22, 2016 by Samantha

Chemistry
What is the maximum mass, in grams, of NH3 that can be produced by the reaction of 1.0 g of N2 and 1.0 g of H2 using the reaction below? N2+H2→NH3 (not balanced) A) 0.60 g B) 5.7 g C) 1.2 g D) 2.9 g
October 19, 2016 by Katelyn

Chemistry
Based on the following balanced equation: 2 C4H10 + 13 O2 --> 8 CO2 + 10 H2O a. How many moles of CO2 are produced after complete reaction of 8.00 moles of C4H10? b. How many grams of CO2 are produced after complete reaction of 8.00 moles of C4H10? c. How many moles of H2O ...
April 29, 2015 by Anonymous

chem
How many grams of nitric acid(HNO3) will be produced when 0.51 mol of dinitrogen pentoxide reacts with water to form nitric acid?
March 7, 2008 by megan

Chem
What is the quantity of heat evolved when 111.9 grams of H2O(l) is formed from the combustion of H2(g) and O2(g)? H2(g) + 1/2 O2(g) --> H2O(l) Delta Ho = -285.8 kJ A. -0.4 kJ B. 1776.7 kJ C. 0.4 kJ D. -1776.7 kJ E. -6.2 kJ
October 26, 2008 by Kyle

math
a 14- gram serving of mayonnaise contains 11 grams of fat. what percen tof the mayonnaise, to the nearest tenth of a percent, is fat?
May 6, 2009 by Anonymous

chemistry
How many grams of glacial acetic acid should be used to make 250 mL of 2.00 M acetic acid? Show all your work.
May 31, 2010 by Lily

chemistry
How many grams of glacial acetic acid should be used to make 250 mL of 2.00 M acetic acid? Show all your work.
May 31, 2010 by Lily

Physics
if the specific heat of aluminum is 0.21 cal/g degree C, how much heat is givin off when 10 grams of aluminum is cooled from .50 to .10 degress
July 11, 2010 by Jasper

chemistry
3CS2 + 6 NaOH==> 2 Na2CS3 + Na2CO3 + 3 H2O how many grams of Na2CS3 are produced in the reaction of 65 ml of liquid CS2(d=1.26 g/ml) and 1.56 mol NaOH?
August 8, 2010 by thimmaiah

Chem
The sedative Demerol hydrochloride has the formula C15H22ClNO2. How many grams are in 0.020 mol of Demerol hydrochloride? I got 6.640g is this right?
October 9, 2010 by Jen

chemistry
For the reation: C3H8+5 02 =3 CO2+4 H2O How many moles of C3H8 are needed to make 3.60 grams of H2O? I think the ans is 44.8molesc3h8
October 24, 2010 by Lillian

chemistry
For the reation: C3H8+5 02 =3 CO2+4 H2O How many moles of C3H8 are needed to make 3.60 grams of H2O? I think the ans is 44.8molesc3h8
October 24, 2010 by Lillian

chemistry
The specific heat of ice is 0.5 calories/gram. 60 grams of ice will require _____ calories to raise the temperature 1°C. so i just do 0.5/60 ??
November 17, 2010 by Jon

Chemistry
The molar heat of solution of NH4NO3 is 25.7 kJ/mol. How much heat (in kJ) would be required to dissolve 20 grams of NH4NO3 in water?
December 14, 2010 by Hannah

science
how much energy is required to obtain superheated steam at 115 degrees celcius from 25 grams of water at 10 degrees celcius?
December 16, 2010 by Tyler

Chemistry - Unit Analysis
The molar mass of cupric chloride is 134.45g/mol. What is the mass, in grams, of 8.19*10^-3 mol of this compound?
January 20, 2011 by Farah

physical science
If 22 grams of water are saturated at 75 degrees celsius with potassium nitrate and then cooled to 40 degrees celsius, how much will precipitate?
February 21, 2011 by chris

Chem
AgNO3 (aq) + HCl (aq) ¨ AgCl (s) + HNO3 (aq) 40.30 grams of silver nitrate and excess HCl, how much silver chloride could you make?
February 27, 2011 by Gigi

Chem
(c) Using the appropriate Ksp value from Appendix D, calculate the solubility of Cu(OH)2 in grams per liter of solution. Appendix D: Ksp for Cu(OH)2 = 4.8 x 10-20 thanks!
April 27, 2011 by Rebekah

chemistry
how much heat would it take to raise the temperature of 52.0 grams of water from 22.0 degrees celcius to 100.0 degrees celcius
June 28, 2011 by Shelly

CHEMISTRY.
Knowing that bleach contatins 5% aqueous sodium hypocholirte, how much sodium hypochlorite does 700ml of 10% bleach contain? (in grams)
September 14, 2011 by ROSE

chem
given that 140.ml of chlorine gas weighs 0.450 g find the density of chlorine in grams per liter(g/liter).
September 27, 2011 by kenny

chem
given that 140.ml of chlorine gas weighs 0.450 g find the density of chlorine in grams per liter(g/liter).
September 27, 2011 by kenny

chemistry
How many grams of carbon disulfide,CS2 will form if 0.450 mol of carbon is consumed in a 3C+2SO2=CS2 +2CO2 reaction
October 15, 2011 by denis

chemistry
How many grams of carbon disulfide,CS2 will form if 0.450 mol of carbon is consumed in a 3C+2SO2=CS2 +2CO2 reaction
October 16, 2011 by denis

chemistry
how do you calculate the empirical formula of the barium hydroxide hydrate if a sample consists of 3.70 grams of barium hydroxide and 2.64 gras of water???
February 3, 2012 by Marissa Turner

chemistry
How many grams of CaO (56.08) are required for complete reaction with HCl (36.46) in 275 mL of a 5.90 M HCl solution? CaO + 2HCl --> CaCl2 + H2O.
February 22, 2012 by Anonymous

chemistry
What volume of solution would be needed to deliver the stated amount of solute? 39.0 grams of solute from a solution that is 16.0 % m/v? (anwser in milliliters
April 26, 2012 by johnc

Chemistry
a mixture of 4.00 moles of hydrogen and 3.00 moles of oxygen is ignited, forming water. what is the maximum amount of water in grams that can be formed?
May 16, 2012 by annabel

Chemistry
A copper ore consists of 6.32% chalcopyrite, CuFeS2(s). How many grams of ore must be processed to obtain one gram of copper?
May 25, 2012 by Jematormal91

Chemistry
if we mix 25 grams of sodium bromide with a large amount of potassium chloride, what will our theoretical yield of sodium chloride be?
February 4, 2013 by Enrique Loza

Chemistry
What is the PH of a buffer made by adding 8.20 grams of sodium acetate(NaCH3CO2) to 500 ml of 0.10 M acetic acid(CH3CO2H). Ka for acetic acid is 1.8 x 10^-5.
April 14, 2013 by Lele

AP Chemistry
We observe that 7 grams of a gaseous com- pound occupies 2102 mL at 49C and 626 torr. What is the molecular weight of the com- pound?
October 15, 2013 by Anonymous

Science
Suppose that 9 grams of a certain substance lost 17.5 calories of heat when the temperature decreased from 70 degrees Celsius to 62 degrees Celsius. What is the Cp
October 23, 2013 by Wyatt

chemistry
A radioactive sample contains 2.45 g of an isotope with a half-life of 3.8 days. How much of the isotope in grams will remain after 11.4 days?
March 14, 2014 by Jacques

science
if a solution is made by adding 83 grams.of soduim hydroxide to 750 ml.of water what is the percent by mass of sodium hydroxide in the solution?
June 26, 2014 by beadeguia

Chemistry
c) How many grams of each matter is in 2,0 litres of the following water solutions i) 8,6 til-% ethanol solution ii) 22,6 til-% glycol solution (1,2-ethanediol)
October 5, 2014 by Luiz

chem
How many grams of the adipic acid (C6H10O4) could form from the reaction of 15.00 g of cyclohexane (C6H12) with the 25.00 g of oxygen? Will the formula be... 2O2 + C6H12 ---> C6H10O4
November 4, 2014 by michelle

Biology/ Chemistry
You want to prepare 0.5 L (500mL) of a 0.250M Na2SO4 solution. How many grams of do you need to measure out for the solution? [MW of Na2SO4 = 142 g
September 21, 2015 by Aileen

chemistry
how many grams of silver carbonate will precipitate when excess ammonium carbonate soln is added to 41.0 mL of a .518 M silver nitrate solution?
March 12, 2016 by JJ

Chemistry
2.16 grams of silver react with 3.20 grans of sulfur.Caculate the mass of silver sulfide produced (mass of ag=108.8g/mole)
April 21, 2016 by GLORIA

Chemistry
Electrochemistry In the electrolysis of aqueous copper(II) bromine CuBr2(aq, 1.00 g of copper is deposited at the cathode. How many grams of bromine are produced at the anode?
July 29, 2016 by sarah simpson

Science, chemistry
During the experiment, 100ml will be required to prepare 0.5M solution of NaNO3. Calculate the mass of NaNO3 in grams that will be required.
August 30, 2016 by Hilen

Chemistry
If the half life of Pu-239 is 2.4 x 10^4 years, how many years are required for a 20-gram sample of plutonium-239 to be reduced to a mass of 5 grams?
November 2, 2016 by Please help

Chemistry
If you have 1911.9 g of a bleach solution. The percent by mass of the solute sodium hypochlorite NaOCl is 3.62. How many grams of NaOCl are in the solution
February 19, 2017 by Daryll

chemistry
You have 1683.8 g of a bleach solution. The percent by mass of the solute sodium hypochlorite, NaOCl, is 3.62%. How many grams of NaOCl are in the solution?
February 19, 2017 by john

Chem
Given the reaction: Fe2SiO4 (s) + 2 H2CO3 (aq) ----> 2FeCO3 (s) + H4SiO4 (aq). How many grams of Fe2SiO4 are required to completely react with 55.0 mL of .500 M H2CO3 (aq)?
March 7, 2017 by Becca

Chemistry
Given the reaction: Fe2SiO4 (s) + 2 H2CO3 (aq) ----> 2FeCO3 (s) + H4SiO4 (aq). How many grams of Fe2SiO4 are required to completely react with 55.0 mL of .500 M H2CO3 (aq)?
March 7, 2017 by Erin

Chemistry
Given the reaction: Fe2SiO4 (s) + 2 H2CO3 (aq) ---> 2 FeCO3 (s) + H4SiO4 (aq) how many grams of Fe2SiO4 (s) are required to completely react with 55.0 mL of .500 M H2CO3 (aq) ?
March 8, 2017 by Erin

science
kevin has a piece of aluminum which has a density of 2.7gms/cm3 and a mass of 63 grams what is the volume of the piece of aluminum
September 17, 2007 by ricky

Chemistry
You are to determine the mass of O2 that can be produced from 25 grams of HgO. Don't forget to balance the equation first! this is the equation: HgO ? Hg + O2
February 12, 2008 by Killa

Chemistry
You are to determine the mass of O2 that can be produced from 25 grams of HgO. Don't forget to balance the equation first! this is the equation: HgO ? Hg + O2
February 12, 2008 by Killa

Chemistry
You are to determine the mass of O2 that can be produced from 25 grams of HgO. Don't forget to balance the equation first! this is the equation: HgO -> Hg + O2
February 12, 2008 by Killa

Health
Does anyone know what our daily percentage of carbs is? And how many grams of starch we need in our daily diets? Please help.
February 20, 2009 by Cassandra

chemistry
what mass (in grams) of solid potassium permanaganate is required to prepare 250mL of a 0.02 M of potassium permanaganate solution?
September 23, 2009 by Hannah

chemistry
what mass (in grams) of solid potassium permanaganate is required to prepare 250mL of a 0.02 M of potassium permanaganate solution?
September 23, 2009 by Hannah

chem
When 13 grams of a sample cools from 56c to 34.4cit loses 25.8 Joules of heat. What is the specific heat of the sample?
October 11, 2009 by Mark

chemistry
how many grams of ethyl alcohol are needed to produce 1 L of a 2 mM solution if 1 mole =46g of ethyl alcohol. how do you calculate?
February 7, 2010 by Chris

CHEMISTRY
The specific heat capacity (cp) of lead is 0.13 J/g °C. How much heat (in J) is required to raise the temperature of 15 grams of lead from 22 °C to 37 °C? a. 2.0 b. -0.13 c. 0.13 d. 29
May 9, 2010 by GRACE

CHEMISTRY
The specific heat capacity (cp) of lead is 0.13 J/g °C. How much heat (in J) is required to raise the temperature of 15 grams of lead from 22 °C to 37 °C? a. 2.0 b. -0.13 c. 0.13 d. 29
May 9, 2010 by GRACE

college
Primitive air consists of 58% H2O 32% CO2 10% N2 so how many grams of primitive air do you need to react with 1 gram of H2?
July 6, 2010 by John

chemistry
Calculate the mass, in grams, of each of the following. a) 1.2×10^23 gold atoms b) 2.78×10^22 helium atoms c) 2.0×10^23 lead atoms d) 7.6×10^21 uranium atoms
September 10, 2010 by Mely

chemistry
a student dissolves 5 grams of table salt into 600 mL of water. in this situation, water is the _, and salt is the _
October 29, 2010 by Anonymous

science
If you have 0.50M Ca(NO3)2 solution, how many mL of this solution must be evaporated to obtain 32.8 grams of solid Ca(NO3)2?
November 3, 2010 by Makena

chemistry
How many grams of NH3 form when 27.5L of H2 (measured at STP)react with N2 to form NH3 according to: N2(g) + 3H2 (g) = 2NH3 (g)
November 22, 2010 by Susan

Anatomy and Physiology
calculate the percent KBr in a solution containing 0.88 grams KBr per 800 mL solution.
March 7, 2011 by paul durlin

algebra 2
10 cm^3 of normal specimen of human blood contain 1.2g of hemoglobin. How many grams does 40cm^3 of same blood contain? Thank you.
March 15, 2011 by Esther

Chemistry
how many grams of each species will be present at the end when 0.500g of copper is added to 2.500g of AgNO3? Cu(s) + 2 AgNO3(aq) --> 2 Ag(s) + Cu(NO3)2 (aq)
June 8, 2011 by tc

Science
find the density of the two rocks. The jagged rock has a mass of 56 grams. this rock therefore has a density of ?
September 22, 2011 by Anonymous

chem
a piece of (density= 10.5 g/ml)dropped into water displaces 21.56 ml of water. what is the mass (in grams) of this piece of silver?
September 27, 2011 by jj

Chemistry
MgCl2(aq) + 2 NaOH(aq) --> Mg(OH)2(s) + 2 NaCl(aq) How many grams of Mg(OH)2 would form if 50.00 mL of 0.9750M NaOH were combined with 50.00 mL of 0.8820 M MgCl2?
November 26, 2011 by Lauren

Chemistry
MgCl2(aq) + 2 NaOH(aq) --> Mg(OH)2(s) + 2 NaCl(aq) How many grams of Mg(OH)2 would form if 50.00 mL of 0.9750M NaOH were combined with 50.00 mL of 0.8820 M MgCl2?
November 26, 2011 by Lauren

math
A Banana Has 27 Grams Of Carbohydrates. It Has A Total Of 121 Calories. How Many Of Its Calories Come From Sources Other Than Carbohydrates?
November 30, 2011 by Hong

chem
A pressure cooker with a volume of 6 L is filled with 27 grams of water and heated to 390.2 K. What is the pressure (atm) in the cooker?
December 5, 2011 by laura

chem
A pressure cooker with a volume of 6 L is filled with 27 grams of water and heated to 390.2 K. What is the pressure (atm) in the cooker?
December 5, 2011 by laura

chemistry
A pressure cooker with a volume of 6 L is filled with 27 grams of water and heated to 390.2 K. What is the pressure (atm) in the cooker?
December 6, 2011 by laura

chemistry
How much heat is needed to raise the temperature of 75 grams of copper from 35„aC to 57„aC? The specific heat of copper is 0.385 J/g „aC.
December 7, 2011 by mario

chemistry
How much heat is needed to raise the temperature of 75 grams of copper from 35„aC to 57„aC? The specific heat of copper is 0.385 J/g „aC.
December 7, 2011 by mario

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