Molecular mass of water (18g) means__________________?
A. 1-mole molecules of water
B. 1-gram molecule of water
C. 3-gram atoms
D. all
Chemistry Basic Concept
Empirical formula of chloroform is____________________?
Empirical formula of chloroform is____________________?
A. CH2 C12
B. CH3C1
C. CC14
D. CHCL3
Chloroform is a colorless, sweet-smelling organic compound with the IUPAC name Trichloromethane and formula CHCl3. Chloroform can daze or knock out people even when it’s consumed in small doses.
The number of peaks obtained in mass spectrometry shows____________________?
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
Mass spectrometer is used to determine Mass number of isotopes and___________________?
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
Diameter of an atom is in the order of________________?
Diameter of an atom is in the order of________________?
A. 0.2m
B. 0.2mm
C. 0.2nm
D. 0.2pm