Calculate the number of moles of oxygen in a 16.3-l tank if the pressure is 331 kpa and the temperature is 197.4°c.

= 1.38 moles

Using the equation;

PV = nRT , where P is the pressure,. V is the volume, n is the number of moles and T is the temperature and R is the gas constant, 0.08206 L. atm. mol−1.

P= 331 000Pa or 3.267 atm T= 197.4 +273 = 470.4, V = 16.3 L

Therefore;

n = PV/RT

  = (3.267 × 16.3)/(470.4 × 0.08206)

  = 1.3796 moles

   ≈ 1.38 moles

in scientific notation, the value of the  speed of light in a vacuum

  will be written as 2.995 * 10^8. when this value is represented in the form of

  a * 10^b, then, a = 2.995 and b = 8.

the value of the speed of light in a vacuum given above can also be rounded up to approximately 300000000. in this case, the scientific notation will be written as 3 *10^8.