True or False? True v The mass of 2 moles of sodium is > 23 g. False v The mass of one mole of nitrogen gas = the mass of 1.204x1024 atoms of nitrogen. True v Avogadro's number of helium atoms = True v The mass of one mole of strontium sulfide < the mass of one mole of strontium and one mole of sulfur combined. True v The number of clowns in a mole of clowns is > Avogadro's number of doorknobs. 2g of helium.

True or False? True v The mass of 2 moles of sodium is > 23 g. False v The mass of one mole of nitrogen gas = the mass of 1.204x1024 atoms of nitrogen. True v Avogadro's number of helium atoms = True v The mass of one mole of strontium sulfide < the mass of one mole of strontium and one mole of sulfur combined. True v The number of clowns in a mole of clowns is > Avogadro's number of doorknobs. 2g of helium.

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter3: Stoichiometry

Section: Chapter Questions

Problem 151AE: A 0.755-g sample of hydrated copper(II) sulfate CuSo4xH2O was heated carefully until it had changed...

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The empirical formula of a gaseous fluorocarbon is CF2 . At a certain temperature and pressure, a 1-L volume holds 8.93 g of this fluorocarbon, whereas under the same conditions, the 1-L volume holds only 1.70 g gaseous fluorine (F2) . Determine the molecular formula of this compound.
It sodium peroxide is added to water, elemental oxygen gas is generated: :math>Na2O2(s)+H2O(l)NaOH(aq)+O2(g) ppose 3.25 g of sodium peroxide is added to a large excess of water. What mass of oxygen gas will be produced?
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A 0.755-g sample of hydrated copper(II) sulfate CuSo4xH2O was heated carefully until it had changed completely to anhydrous copper(II) sulfate (CuSO4 ) with a mass of 0.4183 g. Determine the value of x. [This number is called the number of waters of hydration of copper(II) sulfate. It specifies the number of water molecules per formula unit ofCuSO4 in the hydrated crystal.]
Office Home t Office Home rst- The City University o... an Degree Works - Kingsbo... ome, Gouboth - Blackboard... th Verification - CLEARED4 mch.jsp that is the Scientific Method? 7... pple 2 This test can be sa Your answers are saved automatically. Question Completion Status: QUESTION 1 0.100 mole of lithiumhas a mass of 0.300 g 6.94 g O 0.694 g 3.00 g 0.700 g Click Save and Submit to save and submit. Click Save All Answers to save MAR 1 23 245 tv
Other A Pay Calculate the number of in 19 grams of chlorate. 21. Hydrofluoric acid 20. H3ВО2 Mg=2430 C=35.45x2=70.9 Module 1 Homework Unit Conversions: Calculate the number of oxygen atoms in 19 grams of magnesium chlorate. 191.2 199Mglclo;)2 x Imol 0,0993molmg(cld3x60 Imol -0.59 58 ÉHN 2. What is the mass in grams of 6.8x1018 molecules of ammonium'? N=14.01 H= 1.0083=3.024 L6.8x10"GNi male e NH3 17.034 O-1(0x2=3 cl=3545x2=70.9 Which contains fewer molecules: 97 grams of O2 or 52 grams of Cl2? 0.743male 97g0 male 303 moleo. 5agcl2 mole 4. A sample of acetic acid has 4.22x1024 molecules. How many grams of hydrogen are present? 4.22x10241 5. In 43 grams of acetate, how many atoms of oxygen are present? Ilmole H2: 1.61x3= 3 3 02: 16.00x2: 2.00 Rule of Seven: For Problems 6-15, give the name or formula. 6. Borite 9. BrO2 Bromine Oxide 7. PO33 10. IO32- Phosphiteion Iodite icle 8. Perbromate 11. Cyanide
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H. H 1. CH;CH,MgBr, Et,0 2. H3O* H3C H.
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a. What is the molar mass of Prevacid? Molar mass = g/mol %3D b. What mass of fluorine is in 0.73 mol of Prevacid? Mass = c. What number of carbon atoms is in 0.73 mol of Prevacid? atoms d. What is the mass of 8.66 x 104 molecules of Prevacid?
#21 parts d, e, and f