What is the frequency of a particular type of radiation in hertz given that the wavelength is 4.40 times 10

To solve the question given above, we'll begin by converting 4.40×10² nm to m. This can be obtained as follow:

1 nm = 1×10¯⁹ m

Therefore,

4.40×10² nm = 4.40×10² × 1×10¯⁹

Finally, we shall determine the frequency of the radiation as follow:

Wavelength = 4.40×10¯⁷ m

Velocity = 2.998×10⁸ m/s

Velocity = wavelength × frequency

2.998×10⁸ = 4.40×10¯⁷ × frequency

Divide both side by 4.40×10¯⁷

Frequency = 2.998×10⁸ / 4.40×10¯⁷

Therefore, the frequency of the radiation is 6.81×10¹⁴ Hz

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"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"

i think the answer is terrae but not 100 percent sure. ▓▬▬ §