# Essays Tagged: "moles"

#### Gravimetric determination of water in hydrated magnesium chloride

ing, cooling then weighing is carried out until the mass of the substance is constant.The number of moles of water in a substance can be found by measuring the loss in mass on heating.MgCl2.nH2O MgCl2 ... ge mass of crucible and anhydrous MgCl2 = 40.635Mass of anhydrous MgCl2 (M4 - M1) = 1.045gNumber of moles of MgCl2 (GFM = 95.3g) = 1.045/95.3= 0.012molesMass of H2O removed M2 - M4 = 0.985gNumber of m ...

(1 pages) 74 0 4.2 Mar/2002

Subjects: Science Essays > Chemistry

#### "Gas Law Variables" It describes volume, pressure, and amount of gas.

, 760.0 mm Hg, or 101.325 kPaAmount of Gas:The amount of gas measured in a container is measured in moles or in grams. When using moles, the symbol is "n".

(1 pages) 44 0 3.5 Dec/2002

Subjects: Science Essays > Physics

#### Colon cancer (colorectal cancer) what is cancer? what is colon cancer... symptoms, treatments, preventions

mass of tissue called a tumor. There are a variety of symptoms, such as: lumps, changes in warts or moles, a sore that will not heal, indigestion, difficulty swallowing, and unexplained changes in wei ...

(2 pages) 117 0 2.7 Feb/2003

Subjects: Science Essays > Biology

#### "Finding the relative atomic mass of lithium."

s the watch glass*37.41 g of Watch glass*122 cm3 of hydrogen gas collectedCalculations from method 1Moles of hydrogen produced:Assuming that 1 mole of gas occupies 24000 cm3 at pressure and room tempe ... mole of gas occupies 24000 cm3 at pressure and room temperature!I will now calculate the number of moles of the hydrogen gas produced. I will do that by dividing the volume of gas produced by 24000cm ...

(5 pages) 49 1 4.0 Nov/2003

Subjects: Science Essays > Chemistry

#### Describing the process of Electorlysis and how the number of coloumbs can verify the amount of current given off

an amount of metal can be calculated: Q = n(e) x FQ = quantity of electricity in coulombs (C)n(e) = moles of electronsF = Faraday constant = 96, 500 C mol-1*Electrical Energy, E, can be calculated: E ... = 1,200 ÷ 60 = 20 minutes*Q = n(e) x FCalculate the quantity of electricity obtained from 2 moles of electronsQ = n x FQ = ?n = 2 molF = 96,500 C mol-1Q = 2 x 96,500 = 193,000 C*n(e) = Q &divi ...

(3 pages) 30 1 5.0 Jan/2004

Subjects: Science Essays

#### Lab Report - The Stoichiometry of an Oxidation-Reduction Reaction

Purpose: To find number of moles of Fe+3 which react with one mole of NH3OH+ in order to partially balance the equation: NH3OH+ ... the hydroxylammonium chloride and ferric sulfate solution, and that was used to find the number of moles of Fe+3 which reacts with one mole of NH3OH+ to find the missing part of the equation.Calculat ... 3 which reacts with one mole of NH3OH+ to find the missing part of the equation.Calculations: 0.103 moles/1000 mL = .00103 moles/10 mL.00103 x (2/5) = .000412/16 mL = .0256 M.0256 moles/1000 mL = 1.95 ...

(1 pages) 80 1 2.7 Apr/2004

Subjects: Science Essays > Chemistry

#### The History, Theory, and Application of Avogadro's Principle

d mathematically in the equation Vm = V/n where V is the volume of a sample and n is the amount, in moles, of molecules the sample contains.Avogadro's principle was developed to respond to the conflic ... cal equation, V=n(Vm), there is a direct relationship between the volume of a gas and the number of moles assuming constant pressure and temperature. Also the combined gas law, P1V1/T1 = P2V2/T2 is ba ...

(3 pages) 33 0 3.0 Apr/2004

Subjects: Science Essays > Biology

#### Science Fiction Book Report

n.6.The literary devices I found in this book are:Simile: "…we went underground and dug like moles."Alliteration: "There is no rule in our society saying some special parent payplenty attention ...

(1 pages) 1036 0 0.0 Mar/2007

Subjects: Science Essays

#### Hypochlorite Oxidation of endo-Borneol to Camphor

lab manual and the carbon copy attached.Data and CalculationsWeight of endo-borneol = 0.2013gNo of moles of endo-borneol = 0.2013g/154.25g mol-1 = 1. 305mmolSince one mole of endo-borneol should give ...

(3 pages) 27 0 0.0 Apr/2007

Subjects: Science Essays > Chemistry

#### Hess's Law

mc T. It was found that q=70759.04. From this result, H can be found by dividing q by the number of moles of NaOH. The results showed that H=70246.29. According to Hess's Law, it doesn't matter what p ...

(1 pages) 1585 0 0.0 Apr/2001

Subjects: Science Essays > Chemistry

#### Compsognathus Dinosaur

pressions, a feathered Compsognathus is unlikely.The Compsognathus ate mostly small animals such as moles, rats, and other small Animals. Compsognathus was the fourth smallest dinosaur. Compsognathus ...

(1 pages) 1713 0 1.0 Oct/2001

Subjects: Humanities Essays

#### Moles Of Iron And Copper Formal Lab

going were trying to determine a couple things. What we were trying to determine was the amount of moles of copper and the amount of moles of iron in the chloride and in the nail.Procedure: 1. Put on ... ce of = .66 grams of copper. From the nail there was .66 grams of copper and 2.21 grams of Iron.-In moles; Copper: .66g x 1 mol/63.5g = .01 moles of Copper. (Solving: Take the amount of the remaining ...

(3 pages) 13 1 4.6 Jan/2002

Subjects: Science Essays > Chemistry

#### The Relationship between Heat and Amount of Reaction

corded from this data.6.Steps 1-5 were repeated for each reaction mixture.7.The amount of water (in moles) formed from the reaction between hydrogen and hydroxide ions in each reaction mixture was cal ...

(1 pages) 15 1 4.0 Oct/2007

Subjects: Science Essays > Chemistry

#### Hedgehog

The hedgehog is usually a brownish color or a yellowish color. The hedgehog is also related to the moles. The tail on the hedgehog is about 2 inches long. It can weigh up to as much as 2.25 pounds. T ...

(1 pages) 784 0 0.0 Feb/2008

Subjects: Science Essays > Biology

#### The Hedgehog

The hedgehog is usually a brownish color or a yellowish color. The hedgehog is also related to the moles. The tail on the hedgehog is about 2 inches long. It can weigh up to as much as 2.25 pounds. T ...

(1 pages) 601 0 0.0 Feb/2008

Subjects: Science Essays > Chemistry

#### What has Dylan Thomas tried to achieve in this passage? How has he used language to try and achieve this?

d movement of the sleepy town. For example, Thomas has used similes‘The houses are as blind as moles’to create the image of darkness and desolation. This shows that they are dark and quiet a ...

(2 pages) 26 1 5.0 May/2008

#### Hess's Law

egular glass container. The chemicals needed for this lab are: Sodium hydroxide in tablet-form, 0.5 moles of NaOH and HCl, and an additional 0.25 moles of HCl.During this lab, safety glasses and apron ...

(4 pages) 2101 0 0.0 Sep/2008

Subjects: Science Essays > Chemistry

#### The Ideal Gas Constant

2mm Hg – 21.7 mm Hg = 743.5 mm Hg2) Balanced Equation:Mg (s) + 2HCl (aq) H2 (g) + MgCl2 (aq)3) Moles of Mg used:Molar Mass of Mg is 24.3g/mol0.04268/24.3 = 0.0017564 mol4) Moles of H2 produced:Sa ... of Mg used:Molar Mass of Mg is 24.3g/mol0.04268/24.3 = 0.0017564 mol4) Moles of H2 produced:Same as moles of Mg used is 0.001756 mol5) Calculate R(P)(V)=(N)(R)(T)(1.00684)( 0.0445) = (0.001756)(R)( 29 ...

(2 pages) 2007 0 0.0 Nov/2008

Subjects: Science Essays > Chemistry

#### Chemistry Study Notes - Dalton's Law and Graham's Law

s Law ~ the partial pressure of each gas in a mixture of gases is proportional to the proportion of moles that the gas represents in the mixture.Ptotal = P1 + P2 + P3…Composition of Dry AirPercen ...

(1 pages) 7 0 3.0 Feb/2009

Subjects: Science Essays > Chemistry