Mass spectrometer is used to determine Mass number of isotopes and___________________? April 15, 2025 by admin A. Atomic number B. Relative abundance C. Electronic configuration D. All of the above
The number of peaks obtained in mass spectrometry shows____________________? April 15, 2025 by admin A. Relative abundance B. Average mass of element C. Number of isotopes D. Relative isotopic mass
Empirical formula of chloroform is____________________? April 15, 2025 by admin A. CH2 C12 B. CH3C1 C. CC14 D. CHCL3 Chloroform is a colorless, sweet-smelling organic compound with…
Molecular mass of water (18g) means__________________? April 15, 2025 by admin A. 1-mole molecules of water B. 1-gram molecule of water C. 3-gram atoms D. all
Which of the following statements about isotopes is correct ? April 15, 2025 by admin 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…
One mole of CO2 contains? April 15, 2025 by admin A. 6.022 x 1023 atoms of oxygen B. 22-gram electrons C. 6.022 x 1023 atms of carbon D. both
The number of isotopes of elements with even mass number and even atomic number are ________________? April 15, 2025 by admin A. 280 B. 300 C. 154 D. 54
Which of the following terms is not used for ionic compound ? April 15, 2025 by admin A. formula unit B. empirical formula C. molecular formula D. formula mass
moles of each aluminium and oxygen react with each other to produce aluminium oxide. The amount of product formed is______________________? April 15, 2025 by admin A. 0.18 mole B. 0.27 mole C. 0.24 mole D. 0.09 mole
Which one of the following has the maximum number of isotopes ? April 15, 2025 by admin A. oxygen B. carbon C. tin D. chlorine
