724403
Frage 1
Frage
Number of moles= Volume/24
Antworten
- True
- False
Frage 2
Frage
Number of moles= volume X concentration
Antworten
- True
- False
Frage 3
Frage
Number of moles= mass/mr
Antworten
- True
- False
Frage 4
Frage
0 degrees kelvin= 273 degrees celsius
Antworten
- True
- False
Frage 5
Frage
1 moles= 6.022 X 10^23
Antworten
- True
- False
Frage 6
Frage
The nucleus is made up of?
Antworten
-
Protons, neutrons & electrons
-
Neutrons & protons
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Protons
Frage 7
Frage
A: The mass number (nucleon number) tells you?
Antworten
-
Number of protons
-
Number of protons and neutrons
-
Number of protons, neutrons and electrons
Frage 8
Frage
Z: Atomic (proton) number tells you?
Antworten
-
Total number of protons and neutrons.
-
Number of protons.
Frage 9
Frage
Isotopes are atoms of the same element with a different number of neutrons.
Antworten
- True
- False
Frage 10
Frage
Isotopes have the same mass numbers.
Antworten
- True
- False
Frage 11
Frage
Between isotopes chemical properties vary but physical properties are the same.
Antworten
- True
- False
Frage 12
Frage
Relative atomic mass (Ar)
Antworten
-
the amount of any substance containing as many particles as there are carbon atoms in exactly 12g of the C-12 isotope.
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weighted mean mass of an atom of an element compared with 1/12 of the mass of a C-12 atom.
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mass per mole of a substance (g/mol)
Frage 13
Frage
Acids (proton donor, H+ ions being the active ingredient)
Antworten
-
HCL
-
MgO
-
NaOH
-
H2SO4
Frage 14
Frage
Bases (proton acceptors)
Antworten
-
Metal Oxides and hydroxide
-
White solutions
-
Ammonia
-
Amines
Frage 15
Frage
Alkalis are insoluble bases.
Antworten
- True
- False
Frage 16
Frage
A salt is an ionic chemical compound.
Antworten
- True
- False
Frage 17
Frage
A positive ion is known as a?
Antworten
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Cation
-
Anion
Frage 18
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A salt is produced when an acid is neutralised with?
Antworten
-
A carbonate
-
A base
-
An alkali
Frage 19
Frage
Ammonium salts can be used as artificial fertilisers.
Antworten
- True
- False
Frage 20
Frage
The oxidation state of a free element is it's group number.
Antworten
- True
- False
Frage 21
Frage
The sum of the oxidation states in a molecule= number of atoms in the molecule.
Antworten
- True
- False
Frage 22
Frage
Oxidation is the?
Antworten
-
loss of electrons
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gaining of electrons
Frage 23
Frage
After reduction the oxidation state?
Antworten
-
decreases
-
increases
Frage 24
Frage
A reducing agent is oxidised in the reaction.
Antworten
- True
- False
Frage 25
Frage
Monatomic ions oxidation states is their charge.
Antworten
- True
- False
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