QUIZ- Avigadro's number

Beschreibung

Chemistry (Unit 1+11 - Stoichiometry ) Quiz am QUIZ- Avigadro's number, erstellt von yuvalgalshohet am 30/03/2014.
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Quiz von yuvalgalshohet, aktualisiert more than 1 year ago
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Erstellt von yuvalgalshohet vor mehr als 10 Jahre
47
1

Zusammenfassung der Ressource

Frage 1

Frage
What is a mole?
Antworten
  • An animal
  • 6.02 x10^23 atoms
  • A gram of an element

Frage 2

Frage
What is avigadro's number?
Antworten
  • Avigadro's constant or number is the number of atoms in a mole; 6.02 x10^23
  • 07865543290

Frage 3

Frage
What is meant by 'Structure of matter'?
Antworten
  • How different matter is created: atoms ---> molecules ---> bulk compound atoms ---> bulk element atoms ---> ions ---> bulk ionic compound
  • How elements are structured in different temperatures

Frage 4

Frage
What is RAM?
Antworten
  • Relative atomic mass; the ratio of the average mass per atom of the naturally occurring form of an element to one-twelfth the mass of an atom of carbon-12. RAM is averaged over the different isotopes.
  • Memory in my computer

Frage 5

Frage
Find the RAM of Carbon, Magnesium and Francium respectively
Antworten
  • 6, 12, 87
  • 12, 24, 223

Frage 6

Frage
What is meant by molecular mass?
Antworten
  • Molecular mass is the total mass of all the molar masses of atoms in a molecule
  • Molecular mass is the mass of a molecule of CO2
  • Molecular mass is the mass of one atom in a mole

Frage 7

Frage
What is the difference between RAM and AMU?
Antworten
  • Atomic Mass Units make up the Relative Atomic Mass
  • Relative Atomic Mass is the average mass of an element, when considering all its isotopes. Atomic Mass Unit is one twelfth of a carbon atom.
  • Relative Atomic Mass is the Atomic Mass Unit divided by the number of atoms involved

Frage 8

Frage
What is the formula for the number of moles?
Antworten
  • Moles= Total Mass/ Molecular Mass
  • Moles= Total Mass/ Relative Atomic Mass
  • Moles = Total Mass/ 6.02x10^23

Frage 9

Frage
Find the Empirical Formula for NaOH + P4 +H2O --> PH3 + NaH2PO2
Antworten
  • 3NaOH + P4 +6H2O --> PH3 + 3NaH2PO2
  • 3NaOH + P4 +3H2O --> PH3 + 3NaH2PO2
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