Question 1 of 10
2 points
the speed of a radio wave is 3 x 108 m/s. the wave has a frequency of 9.98 x
10' hz. use the wavelength equation to calculate the wavelength.
o a. 2.5x 10-4 m
o
b. 2.99 x 1016 m
o c. 4.4 x 105 m
o d. 3 m

Dumbledore decides to gives a surprise demonstration. he starts with a hydrate of na2co3 which has a mass of 4.31 g before heating. after he heats it he finds the mass of the anhydrous compound is found to be 3.22 g. he asks everyone in class to determine the integer x in the hydrate: na2co3·xh2o; you should do this also. round your answer to the nearest integ