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Beschreibung
Quiz von yuvalgalshohet, aktualisiert more than 1 year ago
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Erstellt von yuvalgalshohet
vor fast 11 Jahre
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Frage 1
Frage
What is a mole?
Antworten
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An animal
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6.02 x10^23 atoms
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A gram of an element
Frage 2
Frage
What is avigadro's number?
Antworten
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Avigadro's constant or number is the number of atoms in a mole; 6.02 x10^23
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07865543290
Frage 3
Frage
What is meant by 'Structure of matter'?
Antworten
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How different matter is created: atoms ---> molecules ---> bulk compound atoms ---> bulk element atoms ---> ions ---> bulk ionic compound
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How elements are structured in different temperatures
Frage 4
Frage
What is RAM?
Antworten
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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.
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Memory in my computer
Frage 5
Frage
Find the RAM of Carbon, Magnesium and Francium respectively
Antworten
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6, 12, 87
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12, 24, 223
Frage 6
Frage
What is meant by molecular mass?
Antworten
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Molecular mass is the total mass of all the molar masses of atoms in a molecule
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Molecular mass is the mass of a molecule of CO2
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Molecular mass is the mass of one atom in a mole
Frage 7
Frage
What is the difference between RAM and AMU?
Antworten
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Atomic Mass Units make up the Relative Atomic Mass
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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.
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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
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Moles= Total Mass/ Molecular Mass
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Moles= Total Mass/ Relative Atomic Mass
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Moles = Total Mass/ 6.02x10^23
Frage 9
Frage
Find the Empirical Formula for NaOH + P4 +H2O --> PH3 + NaH2PO2
Antworten
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3NaOH + P4 +6H2O --> PH3 + 3NaH2PO2
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3NaOH + P4 +3H2O --> PH3 + 3NaH2PO2
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