A wave has a wavelength of 0.03 m and a frequency of 1 * 10 ^ 10 * H * z . Calculate the speed of light ?

v = 3 x 10^8 m/s

Explanation:

λ = 0.03 m

f = 1 x 10^10 Hz

v = ?

v = fλ

v = (1 x 10^10 Hz)(0.03 m)

v = 3 x 10^8 m/s

"you start with 15.67 g mgco3-xh2o, when heated and all the water is removed, you are left with 7.58 g mgco3 only.

therefore, you had 15.67 - 7.58 = 8.09g h2o  

moles of each :

7.58g mgco3 = ? moles = 7.58g / 83.4g/mole = 0.09moles  

8 09g h2o = ? moles = 8.09g / 18g/mole = 0.44moles  

molar ratio between the two by dividing both numbers by the smallest number :

0.09 / 0.09 = 1  

0.44 / 0.09 = 4.8  

mgco3-5h2o"