Dalton's law of multiple proportions states that when two or more elements combine in different ratios, different compounds are formed.
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Q20: The observation that all samples of tin
Q21: The compounds NO and NO2 represent which
Q22: If 8.0 g of hydrofluoric acid reacts
Q23: How much carbon dioxide is needed to
Q24: The two compounds SO2 and SO3 are
Q26: A compound is made up of two
Q27: Rutherford's gold foil experiment proved what about
Q28: What does the symbol e- represent?
A)Proton
B)Neutron
C)Element
D)Electron
Q29: Boron has how many protons?
A)2
B)3
C)4
D)5
Q30: Atoms of Ca contain how many protons?
A)19
B)40
C)20
D)41
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