General Chemistry

1.A1.001 sample of a gas as STP has a mass of 0.759g. The molar mass of the gas is

2. The pressure of 8.4L of nitrogen gas is in a flexible container is decreased to one-half

      Its original pressure and its absolute temperature is increased to double the original

       Temperature .The volume is now?

3. For an ideal gas, which two valuables are directly proportional to each other( if all other

     conditions remain constant)

4. A flexible vessel contain 41L of gas where the pressureis1.2atm. What will be the volume

     be when the pressure is 0.76atm, the temperature remaining constant

5 .Which condition of P.T and n respectively are most ideal?

6.How many moles of gas are in a gas sample occupying 1.77L at 623mmHg and 298K

7.All of the following are postulates of the kinetic molecular theory of gas except

8. A particular gas exerts a pressure of 6.23mmHg. What is this pressure in units of atmosphere

9. Consider the following thermochemical equation.

       N₂(g)+2O₂(g)    2NO₂(g)+H=66.2Kj

10. According to the following thermochemical equation if 471.0g of NO₂ is produced ,how much

           Heat is released at constant pressure ?  2NO(g)+O₂(g)   2NO₂(g)   =_114.4Kj

11.  Given     4NCl₃(g)+3O₂(g)       2Al2O₃(g)    =529.0Kj

        Determine   H  for the following thermochemical equation

         Cl(g)+Al2O₃(s)    ACl₃(s)+O₂(g)

12.  If𝞿=31Kj for a certain process , that process

13. Given

       Fe2O(s) + 3CO2(g)      2Fe(s)+3CO2(g)   H=26.8Kj

       FeO(s)+CO2(g)          Fe(s)+CO(g)    =_16.5Kj

       Determine      H for the following thermochemical equation

14. Exactly 273.5 J  will raise the temperature of 10.0g of a metal from 25.0⁰C TO 60.00C.  What

        Is the specific  heat capacity of the metal?

15.  The energy associated with a speeding bullet is called

16.How much heat is gained by nickel when 29.2g of nickel  is warmed from 18.30C to 69.60C. The specific heat of nickel is 0.443J (g 0C)

17. What is the frequency of a photon having a wavelength of 602.5 nm

      (c=3.00*10³m/s, h=6.63*10³⁴Js,1 meter=1*10⁹nm

18. What is the wavelength of a photon having a frequency of 3.00*10¹⁵H₂

         (c=3.00*10⁸ms, h=6.63*10^_34Js, 1 meter=1*10⁹nm

19. What is the wavelength of a photon that has an energy of 4.28*10_18J

(c=3.00*10³m/s, h=6.63*^_34Js, 1 meter=1*10⁹nm)

20. What is the energy of a photon of electromagnetic radiation with a wavelength of 689.8nm

(c=3.00*10³m/s, h=6.63*10^_34Js, 1 meter=1*10⁹nm)