Which of the following terms is not used for ionic compound?
A. formula unit
B. empirical formula
C. molecular formula
D. formula mass
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Chemistry
One mole of CO2 contains?
A. 6.022 x 1023 atoms of oxygen
B. 22-gram electrons
C. 6.022 x 1023 atms of carbon
D. both B & C
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Which of the following statements about isotopes is correct?
A. Isotopes with odd atomic number are abundant
B. Isotopes with odd atomic number and even mass number are abundant
C. Isotopes with even atomic number and even mass number are abundant
D. Isotopes with even atomic number and odd mass no are abundant
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Molecular mass of water (18g) means
A. 1-mole molecules of water
B. 1-gram molecule of water
C. 3-gram atoms
D. All
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Empirical formula of chloroform is
A. CH2 C12
B. CH3C1
C. CC14
D. CHCL3
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The number of peaks obtained in mass spectrometry shows
A. Relative abundance
B. Average mass of element
C. Number of isotopes
D. Relative isotopic mass
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Mass spectrometer is used to determine Mass number of isotopes and
A. Atomic number
B. Relative abundance
C. Electronic configuration
D. All of the above
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Diameter of an atom is in the order of
A. 0.2m
B. 0.2mm
C. 0.2nm
D. 0.2pm
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What is a mixture of Potassium Nitrate Powdered Charcoal and Sulphur called?
A. Paint
B. Glass
C. Gun Powder
D. Cement
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