The mass of one mole of electron is________________?

Related Mcqs:

1. 1 mole of electron has mass in microgram_________________?

   A. 1.008 x 10-3
   B. 5.5 x 10-4
   C. 1.84 x 10-4
   D. 1.673 x 10-3

2. When an electron is moving with velocity of 2.188 x 106 ms-1 in the first orbit of Bohrs model of hydrogen. The de Broglie wavelength of electron is______________?

   A. 0.33 nm
   B. 0.34 nm
   C. 0.35 nm
   D. 0.36 nm

3. 0.5 mole of nitrogen gas and 0.5 mole of carbon monoxide gas at STP have same_____________?

   A. Value of a
   B. Mass
   C. Atoms
   D. Both B and C

4. The value of e/m ratio of electron is________________?

   A. 6.02 x 1023 C/kg
   B. 1.7588 x 1020 C/kg
   C. 9.1095 x 10-31 C/kg
   D. 1.7588 x 1011 C/kg

5. Quantum number which tells the energy of electron is________________?

   A. n
   B. 1
   C. m
   D. s

6. A compound is determined to have an emperical formula of C2H6O and a molar mass of 138 g/mole. What is the molecular formula?

   A. C2H6O
   B. C6H18O3
   C. C6H12O6
   D. C2H5O

   Submitted by: Muhammad Ali Kunbhar

7. A substance is analyzed and found to have an emperical formula of CH2 and a molar mass of 56g/mole. What is the molecular formula of the compound?

   A. C2H4
   B. C3H6
   C. C4H8
   D. C5H10

   Submitted by: Muhammad Ali Kunbhar

8. What is the mass of one mole of Iodine?

   A. 74g
   B. 254g
   C. 127g
   D. 53g

   Submitted by: Shumail Bashir

9. 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

10. A sample of an iron and oxygen ore has a mass of 35.8 grams. The iron in the compound has a mass of 27.9 grams. What is the percent iron in the ore?

    A. 74% Fe
    B. 75% Fe
    C. 77% Fe
    D. 78% Fe

    Submitted by: Muhammad Ali Kunbhar