What is the molarity of 15.0 g of nabr in 0.250 l of solution

n = m/M = 15/102.894 = 0.1457811 moles

c = n/V = n / 0.25 = 0.58312438 moles/dm3

d.) circle motion requires a force to give it a centripetal acceleration.

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.