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July 29, 2014

Search: a 2.747 g sample of manganese metal is reacted with excess HCl gas to produce 3.22 L of H2 at 373 K and 0.951 atm and a manganese chloride compunds. what is the formula of the manganese chloride compound produced in the reaction?

Number of results: 11,673

science
A 2.747-g sample of manganese metal is reacted with excess HCl gas to produce 3.22 L of H2 at 373 K and 0.951 atm and manganese chloride compound (MnClx) what is the formula of manganese chloride compond produced in the reaction?
December 9, 2007 by heather

chem
a 2.747g sample of manganese metal is reacted with excess HCl gas to produce 3.24L of H2 at 366K and .927atm and a manganese chloride compound(MnCl0. What is the formula of the manganese chloride compound produced in the reaction?
November 16, 2007 by mel

chemistry
What is the chemical equation for the reaction of manganese metal with sulfuric acid to produce aqueous manganese (II) sulfate and hydrogen gas
February 24, 2011 by Anonymous

chemistry
a 2.800 g sample of metal M reacted with oxygen to form 3.365 g Ms)3. What is the atomic mass of the metal M?
September 16, 2007 by julie

Chemistry
Metallic aluminum reacts with MnO2 at elevated temperatures to form manganese metal and aluminum oxide. A mixture of the two reactants is 67.2% mole percent Al. Find the theoretical yield (in grams) of manganese from the reaction of 240 g of this mixture.
October 8, 2009 by Liz

chemistry
if a sample of alloy containing magnesium and metal that doesn't react wtih hydrochloric acid are reacted, how much heat would be evolved from a 5 gram sample that is 30% magnesium?
July 13, 2011 by mike

Science
Jake was doing a lab to find the density of metal. Here's his data: mass of the metal sample: 45 grams, volume of metal sample: 4.5 mL. Use his data to determine the density of the metal sample. Can you help? I don't get this.
October 7, 2010 by Haley

chemistry
A sample of cesium metal reacted completely with water, evolving 47.0 mL of dry H2 at 31C and 769 mmHg. What is the equation for the reaction?
December 13, 2011 by Jessica

Chemistry
A sample of cesium metal reacted completely with water, evolving 48.7 mL of dry H2 at 24C and 774 mmHg. What is the equation for the reaction? (Include states-of-matter under SATP conditions in your answer. Use the lowest possible coefficients.) What was the mass of cesium in...
June 13, 2011 by Lance

science
Al(s) + HCl(aq) AlCl3(aq) + H2(g) Zn(s) + HCl(aq) ZnCl2(aq) + H2(g) Consider the unbalanced equations above. A 0.250 g sample of a mixture of aluminum and zinc metal is reacted with an excess of hydrochloric acid. Both metals react with hydrochloric acid. The sample produces ...
April 29, 2013 by samantha

Chemistry
Al(s) + HCl(aq) AlCl3(aq) + H2(g) Zn(s) + HCl(aq) ZnCl2(aq) + H2(g) Consider the unbalanced equations above. A 0.200 g sample of a mixture of aluminum and zinc metal is reacted with an excess of hydrochloric acid. Both metals react with hydrochloric acid. The sample produces ...
October 7, 2013 by Connor

chemistry
-You have a sample of unkonw metal that you have heated to 100 deg Celsius (oC) in boilin water. If, unknown to you, the metal sample cools somewhat before being added to your calorimeter, what will be the effect on the delta T for the water in your calorimeter (assume you ...
January 29, 2009 by kristine

Chemistry
(a) A sample of cesium metal reacted completely with water, evolving 48.7 mL of dry H2 at 24C and 774 mmHg. What is the equation for the reaction? Include states-of-matter under SATP conditions in your answer. Use the lowest possible coefficients. (b) What was the mass of ...
June 17, 2011 by Lance

Chemistry
A sample of Manganese (II) Chloride has a mass of 19.8 grams before heating, and 12.6 grams after heating until all the water is driven out. Based on this information, how many water molecules were attached to each molecule of Manganese (II) Chloride?
January 22, 2012 by Diana

Chem
what occurs during the reaction below 4Hcl+MnO2-->MnCl2+2H2O+Cl2 1.the manganese is reduced and its oxidation number changes from +4 to +2. 2.the manganese is oxidized and its oxidation number changes from +4 to +2. 3.the manganese is reduced and its oxidation number ...
March 20, 2011 by Tina

math
In a 180 kilogram sample of ore, there was 3.2% of metal. How many kilograms of metal were in the sample?
March 18, 2012 by jocelyn

chemistry
Mildy basic potassium permanganate reacted with 1.25g of contaminated zinc granules to produce zinc hydroxide and solid manganese(iv)oxide.suppose 20.5ml of 0.050Molar of potassium permanganate completely reacted with contaminated zinc granules,how many moles of potassium ...
December 21, 2011 by sister ruth

Chemistry
a sample of an unknow metal exists as a perfect cube that meausres 0/78 in on a side and weighs 61.4 grams. what would be the mass, in grams, of a diff sample of this metal that has a volume of 25.0 cm^3
September 18, 2012 by Helen

Chemistry
A 0.188g sample of unknown metal, X (s), produced 71.4 ml of hydrogen gas when reacted with HCL according to the equation: X(s)+2HCL(aq)--->XCl2(aq)+H2(g) The gas was collected over water at 23 degrees Celsius. The levels of water inside and outside the gas collecting tube ...
February 10, 2011 by K

Chemistry
A1g sample of enriched water, a mixture of H2O AND D2O, reacted completely with Cl2 to give a mixture of HCl and DCl. The HCl and DCl were then dissolved in pure H2O to make a 1.00 L solution. A 25.00 mL, sample of the 1 L solution was reacted with excess AgNO3 and 0.3800g of ...
September 21, 2013 by Anirudh

chemistry
A 19.5-g sample of a metal was heated to 61.67C. When the metal was placed into 26.5 g of water in a calorimeter, the temperature of the water increased from 25.00C to 30.00C. What is the specific heat of the metal?
October 29, 2010 by caroline

chemistry
A 19.5-g sample of a metal was heated to 61.67C. When the metal was placed into 26.5 g of water in a calorimeter, the temperature of the water increased from 25.00C to 30.00C. What is the specific heat of the metal?
October 31, 2010 by Emily

Chemistry
A 19.5-g sample of a metal was heated to 61.67C. When the metal was placed into 27.1 g of water in a calorimeter, the temperature of the water increased from 25.00C to 30.00C. What is the specific heat of the metal?
June 7, 2011 by Lance

chemistry
A 37.0 g mass of a metal was heated to 100C and then plunged into 74 g of water at 24.0C. The temperature of the resulting mixture became 28.0C. (a) How many joules did the water absorb? (b) How many joules did the metal lose? (c) What is the heat capacity of the metal ...
April 27, 2014 by Kelsey

science
Technetium is a transition metal similar to manganese. what chemical and physical properties would you expect technetium to have?
February 19, 2009 by fern

Chemistry
A 1.00 g sample of enriched water, a mixture of H2O and D2O, reacted completely with Cl2 to give a mixture of HCl and DCl. The HCl and DCl were then dissolved in pure H2O to make a 1.00 L solution. A 25.00 mL sample of the 1.00 L solution was reacted with excess AgNO3 and 0....
September 21, 2012 by Adam

chem
The experiment described in the procedure was performed using a sample of Calcium with HCl(aq). The lab conditions were 25.00C, and 747.0 torr barometric pressure. 112.7 mg of Calcium (MM: 40.08 g/mol) was reacted with 25.00 mL of 1.25M HCl(aq). 71.560g of water was collected...
November 18, 2013 by Anonymous

chem
what is the number of moles of manganese (II) iodide in a sample whose mass is 650 g?
December 18, 2012 by simon

physical science
a 1.0 kg sample of metal with a specific heat of 0.50KJ/kgCis heated to 100.0C and then placed in a 50.0g sample of water at 20.0C. What is the final temperature of the metal and the water? I can't figure this out. Is the answer room temperature???
November 7, 2007 by nate

chemistry
All of the lanthanide metals react with HCl to form compounds having the formula MCl2,MCl3,or MCl4 (where M represents the metallic element). Each metal forms a single compound. A chemist has .250g sample of a transition metal, and wishes to identify the metal. She reacts the ...
February 9, 2011 by T

chemistry
sometimes,instead of percentage composition, you will have the composition of a mass sample. using the actual mass of the sample, determine the empirical formula for compounds that have the following analyses. b. a 13.07g sample of an unknown substance is composed of 9.48g of ...
February 23, 2013 by tula

Chemistry
Nickel metal reacted with oxygen: Ni (s) + O2 (g) --> Ni2O3 (s). 95.00g of Nickel is reacted with 2.000L oxygen at 10.56 atm and 30.00 degrees Celsius. At the end of the reaction the pressure was reduced to 7.56 atm at the same temperature and volume. How many grams of ...
September 18, 2011 by Louis

Chemistry
A 108g piece of unknown metal is heated to 100 degrees C in boiling water. The heated sample of metal is then dropped into 50ml of H20, which is initially at 23.0 degrees C. After a few minutes the temp. of water raises to 37.5 degrees C. What is the specific heat capacity of ...
May 14, 2011 by Lesley

chemistry
A 2.3g sample of MgX is reacted with NaOH. The Mg(OH)2 precipitate had a mass of 1.8g. What is the % of Mg in the original sample?
October 15, 2007 by corey

chemistry
A 13.5 g sample of X reacts with a sample of Y to form 81.1 g of XY. What is the mass of Y that reacted?
September 19, 2011 by Mary

chemistry
a metal sample weighing 45.0g and at a temperature of 99.1C was place in 38.6g of water in a calorimeter at 25.0C. the calorimeter reached a maximum temperature of 32.8C. 1. calculate the specific heat of the metal. 2. what is the approximate molar mass of the metal?
November 13, 2008 by luke

Chemistry
Suppose 2 grams of an unknown metal carbonate MCO3 is reacted with excess HCl and 0.88 grams of CO2 are produced. What is the atomic mass (molar mass) of the unknown metal M? What element is it?
October 7, 2012 by Anonymous

chemistry
A mixture of CaCO3 and MgCO3 weighing 7.85 g was reacted with excess HCL. The reactions are CaCO3+2HCL=CaCl2+H2O+CO2 and MgCO3+2HCl=MgCl2+H2O+CO2. The sample reacted completely to produce 1.94 L CO2 at 25 degrees C and 785 torr. Calculate the percentage of CaCO3 and MgCO3 in ...
October 17, 2010 by Sue

Chemistry
A sample of unknown metal has a mass of 36.7 g. This metal was placed in boiling water at 96.0oC until the metal had reached the temperature of the water. The metal was then placed in a foam cup with 50.0 g of water in it at 20.0oC. The cup absorbs 42.0 J/oC, and the ...
November 10, 2013 by katie

chemistry
A sample of gas has a mass of 0.565g . Its volume is 120 mL at a temperature of 80∘C and a pressure of 747 mmHg . what is the molar mass
March 9, 2014 by steph

Science
To determine the mass percentage of an iron sample, the dissolved sample [iron exists at the start as iron(II)] was titrated with potassium permanganate (permanganate forms manganese(IV) oxide.)If 22.25 cubic cm of 0.0123 potassium permanganate, what is the mass percent of ...
May 2, 2011 by Anna

chemistry
a 225.0g sample of an unknown, silver, pure metal was heated to 95.5 degrees Celsius and then put into 150.50g of water at 22.5 degree Celsius. the water was heated by the hot metal to a temp. of 31.4 degree Celsius. what is the specific heat of the metal and what is the metal?
March 15, 2013 by brittany

chemistry
Can you help me write and balance this equation. I also have to include the physical states. Question: When manganese(Mn)is put into dissolved hydrochloric acid(HCl)it produces solid manganese(III)chloride (MnCl3) plus hydrogen. Thanks :)
January 24, 2008 by Miley

chemistry
When zinc metal is reacted with hydrochloric acid, zinc chloride and hydrogen gas are produced. If 16.4 ml of 2.14 M HCl are used: a) how many grams of zinc metal are needed to completely use up the acid? b) What will be the molarity of the aqueous product? Please show all ...
December 7, 2011 by Lindsay

AP Chemistry
A mixture of aluminum and zinc metal is used in 2 experiments described below: A- A 1.7 gram sample of the mixture is reacted with excess hydrochloric acid and the resulting hydrogen gas is collected over water. The reaction takes place at 750 mm Hg atmospheric pressure and ...
April 3, 2011 by Kate

GA perimeter
What is the specific heat of a metal if 7.74 x 103 J of energy is required to warm a 75.0 g sample of the metal from 10 C to 125 C?
January 21, 2012 by Anonymous

Chem
22.8 kg of a metal has a density of 8.3g/mL. Calculate the volume of the metal sample?
February 22, 2011 by jay

Chem. Percent Yield
Titanium, a strong, lightweight metal used in many applications, is prepared by the reaction of titanium(IV) chloride with molten magnesium metal. 3.45 x 10^7g of titanium(IV) chloride is reacted with 1.13 x 10^7g of magnesium, 7.91 x 10^6g of titanium metal are obtained. What...
February 28, 2011 by Toni Jones

Science
if 1.2 g of sodium metal is reacted with 2 mL of H20, how many grams of NaOH will be produced
September 27, 2011 by Philip

Chemistry
Determine the potential (in V) of an electrochemical cell using a gold electrode and gold (III) [0.0243 M] solution in combination with a manganese/manganese (II) [0.00567 M] half cell How on earth would I do this question? I just know Au(3+) + 3e- = Au and E = 1.22 V
June 10, 2009 by Joe

chemistry
when aqueous solutions of sodium carbonate and manganese(V) chloride are mixed, a precipitate forms. The precipitate is a compound containing manganese. I have to write the chemical, complete ionic, and net ionic equations for it.
February 16, 2010 by Lola

Chemistry
M2CO3 ( M is a metal) 5,22 g dissolved in H2O and reacted with HCl CO3(-2) (aq) + 2H+ (aq) --> CO2 (g) + H2O (l) CO2 produced and collecting over H2O . 2.0L at 25 C P= 475 mmHg Vapour pressure of H2O at 25 C = 23,8 mmHg Then Which metal is M ?
October 8, 2012 by Which metal?

science
a 100.0 gram metal sample is heated to a temperature of 110 degrees celcius then placed into a calorimeter containing 100.0 r of pure water (at initial temperature of 23 degrees celcius). after the sample and water reach thermal equalibrium, their final temperature is 29 ...
March 1, 2011 by jason wolthen

analytical chemisty
Consider the standardization of a solution of K2Cr2O7 with iron metal according to the following: Reaction: Fe + Cr2O7-2 → Fe +3 + Cr+3a. How many grams of K2Cr2O7 are required to prepare 500 ml of a 0.13 N solution? What is the exact normality of the solution prepared ...
February 2, 2013 by Anonymous

chemistry
A stock solution containing Mn2+ ions was prepared by dissolving 1.168 g pure manganese metal in nitric acid and diluting to a final volume of 1.000 L. Calculate the concentration of the stock solution.
August 9, 2012 by rachel

chemistry
a sample of 15.00 g of an unkown metal chloride, MCl2 is dissolved in 75.0 mL water. the boiling point of the resulting solution is measured at 102.37 degrees C. what is the identity of the metal M.
May 13, 2013 by alice

chemistry
a sample of 15.00 g of an unkown metal chloride, MCl2 is dissolved in 75.0 mL water. the boiling point of the resulting solution is measured at 102.37 degrees C. what is the identity of the metal M.
May 13, 2013 by lucy

chemistry
If 2.10 kJ of heat is needed to raise the temperature of a sample of metal from 10.C to 28C, how many kilojoules of heat will be required to raise the temperature of the same sample of metal from 34C to 57C?
October 6, 2010 by ruby

chemistry
If 3.50 kJ of heat is needed to raise the temperature of a sample of metal from 10.C to 30.C, how many kilojoules of heat will be required to raise the temperature of the same sample of metal from 31C to 54C?
November 12, 2010 by Delaney kidd

Chemistry
If 2.80 kJ of heat is needed to raise the temperature of a sample of metal from 10.C to 27C, how many kilojoules of heat will be required to raise the temperature of the same sample of metal from 40.C to 58C?
June 21, 2012 by Joseph

Chemistry
If 7.60 kJ of heat is needed to raise the temperature of a sample of metal from 10.C to 25C, how many kilojoules of heat will be required to raise the temperature of the same sample of metal from 35C to 53C?
March 13, 2013 by Faith

Chem
If 7.60 kJ of heat is needed to raise the temperature of a sample of metal from 10.C to 25C, how many kilojoules of heat will be required to raise the temperature of the same sample of metal from 35C to 53C?
March 13, 2013 by Faith

Chemistry
If 7.60 kJ of heat is needed to raise the temperature of a sample of metal from 10.C to 25C, how many kilojoules of heat will be required to raise the temperature of the same sample of metal from 35C to 53C?
March 13, 2013 by Faith (Pls Help) (Would Trully Appreciate it)

CHEMISTRY
If 7.60 kJ of heat is needed to raise the temperature of a sample of metal from 10.C to 25C, how many kilojoules of heat will be required to raise the temperature of the same sample of metal from 35C to 53C?
March 13, 2013 by Faith (Pls Help) (Would Trully Appreciate it)

CHEM
If 7.60 kJ of heat is needed to raise the temperature of a sample of metal from 10.C to 25C, how many kilojoules of heat will be required to raise the temperature of the same sample of metal from 35C to 53C?
March 13, 2013 by Faith (Pls Help) (Would Trully Appreciate it)

chemistry
An 8.6 g sample of a metal is heated to 110.0oC and then placed in a coffee cup calorimeter containing 125 g of water at a temperature of 23.00oC. After the metal cools, the final temperature of the metal and water is 26.83oC. Assuming that no heat is lost to the surroundings ...
August 3, 2011 by TI

Science
At 518 degress celsius that rate of decomposition of a sample of acetaldehyde, initially at a pressure of 363 torr, was 1.07 Torr/sec when 5% had reacted, and 0.760 torr/sec when 20% had reacted. What is the order of the reaction?
September 10, 2011 by Jenna

chemistry
At 518 degress celsius that rate of decomposition of a sample of acetaldehyde, initially at a pressure of 363 torr, was 1.07 Torr/sec when 5% had reacted, and 0.760 torr/sec when 20% had reacted. What is the order of the reaction?
September 10, 2011 by Jenna

Chemistry
Need help solving this problem. A 0.188g sample of unknown metal, X (s), produced 71.4ml of hydrogen gas when reacted with HCl according to the equation: X(s)+2HCl(aq)--> XCl2(aq)+H2(g) The gas was collected over water at 23 degrees C. The levels of water inside and outside...
September 5, 2011 by Louis

NEED HELP!
A mixture contained CaCO3 and MgCo3. A sample of this mixture weighing 7.85g was reacted with excess HCl. The reactions are-- CaCO3 + 2HCl --> CaCl2 + H2O + CO2 MgCO3 + 2HCl --> MgCl2 + H2O + CO2 Is the sample reacted completely and produced 1.94L of CO2, at 25 degrees C...
November 5, 2009 by Mary

chemistry help!
A mixture contained CaCO3 and MgCo3. A sample of this mixture weighing 7.85g was reacted with excess HCl. The reactions are-- CaCO3 + 2HCl --> CaCl2 + H2O + CO2 MgCO3 + 2HCl --> MgCl2 + H2O + CO2 Is the sample reacted completely and produced 1.94L of CO2, at 25 degrees C...
November 6, 2009 by Mary

12th grade
what mass of copper may be produced when excess CuSO4 is reacted with 100g of aluminum metal?
February 23, 2009 by carson

Chemistry
How many liters of hydrogen gas can be produced at 300.0K and 1.55atm if 20.0g of sodium metal is reacted with water?
December 6, 2012 by Allie

Chemistry
How many liters of hydrogen gas can be produced at 300.0K and 1.55atm if 20.0g of sodium metal is reacted with water?
December 6, 2012 by Allie

General Chemestry
Diacetyl, a substance contributing to characteristic flavor and aroma of butter, consist of 55.8% C, 7.03% H, and 37.17% O. In the gaseous state at 100 C and 747 torr, a 0.30 gram sample occupies a volume of 111ml. What is the molacular formula of diacetyl?
October 26, 2008 by Aisha

statistics
Among 17 metal parts produced in a machine shop, 6 are defective. If a random sample of four of these metal parts is selected, find: (a) The probability that this sample will contain at least three defectives. (Do not round the intermediate answers. Round your answer to 4 ...
April 8, 2011 by Kate

chemistry
Diacetyl, a substance contributing to the characteristic flavor and aroma of butter, consists of 55.8% C, 7.03% H, and 37.17% O. In the gaseous state at 100 degrees celsius and 747 torr, a 0.30 gram sample occupies a volume of 111 ml. What is the molecular formula of diacetyl?
February 23, 2010 by Bob

chemistry
the temperature of a 20.0g sample of a metal(specific heat .03 J/g-C) is raised by 20C. How much heat has been absorbed by the metal?
July 13, 2011 by matt

Chemistry
A 40.0g sample of an unknow, yellowish-brown, pure metal was heated to 62degrees Celcius and put into a coffee cup calorimeter containing 85.0g of watera at 19.2 degrees Celcius. The water was heated by the hot metal to a temperature of 21.0 degrees Celcius. What is the ...
September 24, 2010 by Kelly

Chemistry
A 40.0g sample of an unknow, yellowish-brown, pure metal was heated to 62degrees Celcius and put into a coffee cup calorimeter containing 85.0g of watera at 19.2 degrees Celcius. The water was heated by the hot metal to a temperature of 21.0 degrees Celcius. What is the ...
September 24, 2010 by Kelly

chemistry
A mixture contained zinc sulfide, ZnS, and lead sulfide, PbS. A sample of the mixture weighing 6.12 g was reacted with an excess of hydrochloric acid. The reactions are given below. ZnS(s) + 2 HCl(aq) → ZnCl2(aq) + H2S(g) PbS(s) + 2 HCl(aq) → PbCl2(aq) + H2S(g) If ...
October 24, 2010 by caroline

Science/C
A 250 gram sample of metal is warmed from 50C to 90C when 100 calories of heat are added. What is he specific heat capacity of the metal?
October 12, 2012 by Raylee

chemistry
combustion of 0.356g of an unknown metal sample in oxygen gives 0.452g of an oxide in the form of mO2, Identify the unknown metal?
November 23, 2010 by Brittany

Chemistry
a 9.85 g sample of an unknown metal M is burned in the presence of excess oxygen, producing the oxide M2O3 (s) and liberating 57.8kJ of heat at constant pressure. What is the identity of the metal? 4M(s) + 3O2(g) yields 2M2O3(s)
November 4, 2012 by Kelly

Chem
a 0.2000 grams sample of aluminum metal is added to a solution containing 1.0000grams of an unknown compound made of platinum and chloride ion. the reaction results in the formation of aluminum chloride and platinum metal. when the reaction is complete, unreacted aluminum ...
March 1, 2014 by Carley

Science
a sample of an unknown metal has a mass of 21.6g and a volume of 8.00cm^3 . calculate the density of the unknown metal
February 23, 2013 by Stefan

chemical test
I'm going to do the Baeyer test (Pottasium permanganate) Instructions say to disslove 25mg of unknown or 2 drops of liquid unknown in 2ml of 95% ethanol. Slowly add 1% aqueous solution (weight/volume) of potassium permanganate, drop by drop with shaking, to the unknown. In a ...
December 2, 2007 by ~christina~

chemistry
a 23.8 g sample of unknown metal heated at 100 degrees c is placed in 50.0 mL of water at 24 degrees c resulting in 8.5 c temperature increase. What is the specific heat of the metal
March 12, 2013 by Paula

Chemistry II
A stock solution containing manganese ions was prepared by dissolving 1.542 g pure manganese metal in nitric acid and diluting to a final volume of 1.000L. Calculate the concentration of the stock solution. mols Mn = g/atomic mass Mn. M = mols/L 1.542 g / 54.9 amu Mn = .028 ...
April 16, 2007 by Jayd

Chemistry
A chemist heated a sample of steel wool in a burner flame exposed to oxygen in the air. He also heated a sample of steel wool in a container of nearly 100% oxygen. The steel wool sample in the container reacted faster than the other sample explain why
March 17, 2010 by Anonymous

ocean county college
A 150 g sample of metal at 55.0 C raises the temperature of 150 g of water from 23.0 C to 35.0 C. Determine the specific heat of the metal in J/g C. Hint: #1 First find heat absorbed by water using formula q = mass x specific heat x change in temp (of water). #2 Use this value...
March 21, 2010 by adina

Chemistry
A 0.160-g sample of unknown metal (X) reacts with hydrochloric acid to produce 66.5 mL of "wet" gas at 20 C and 754 mm Hg. What is the unknown metal (X)? (The vapor pressure of water at 20 C is 18 mm Hg. Help please?
April 23, 2014 by Ally

Science
Chemistry! So a metal is found to absorb 1000 calories as it is heated from 40.0C to 60.0C. How much heat would the same sample absorb if it were heated from 60.0C to 80.0C? I know I'm supposed to use the equation Q=s x m x delta t (or soemthing) Q= energy absorbed s= specific...
January 14, 2013 by Ari

Chemistry
In a thermochemistry experiment the reaction of 0.0857 g of an unknown metal and an excess of 4.0 M HCl resulted in a 0.210 mL decrease in the volume of an ice/water mixture. Calculate the enthalpy of this reaction per 1 g of metal reacted. Needed data: density of water at 273...
December 1, 2007 by Raj

chemistry
A 1.70 g sample of a certain metal reacts with acid to liberate 380 mL of hydrogen gas, when collected over water at 20 Celsius and over 720 torr. What is the equivalent mass of the metal?
November 27, 2012 by Brit

chemistry
a 225.0 g sample of an unknown, silver, pure metal was heated to 95.5 degrees celsius then put into 150.50 g of water at 22.5 degrees celsius. the water was heated by the hot metal to a temperature of 31.4 degrees celsius. what is the specific heat? what is the metal?
March 18, 2013 by brittany

CHEMISTRY
When 2.47 g of chromium is reacted with an excess of sulphur, the compound Cr2S3 results. Treating the Cr2S3 so formed with strontium metal converts all of the sulphur to SrS. Reacting the SrS with sodium metal then converts all the SrS to Na2S. What mass in grams of Na2S is ...
November 3, 2007 by Matt

chemistry
Duralin is an alloy of aluminium containing 4.5% manganese, 3.5% copper, and 0.45% magnesium. How much magnesium is present in a 90 g sample of this alloy? Answer in units of mol
November 6, 2011 by lynn

Chemistry
Duralin is an alloy of aluminium containing 4.5% manganese, 3.5% copper, and 0.45% magnesium. How much magnesium is present in a 32 g sample of this alloy? Answer in units of mol
October 9, 2013 by Susan

Chemistry
Help please: A 0.199-g sample of unknown metal (X) reacts with hydrochloric acid to produce 88.5 mL of "wet" gas at 20 C and 754 mm Hg. What is the unknown metal (X)? (The vapor pressure of water at 20 C is 18 mm Hg.) X(s) + 2 HCl(aq) → XCl2(aq) + H2(g) (Would Mg be ...
April 17, 2014 by Ally

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