Answer:
Explanation:
The relation between frequency and wavelength is shown below as:
c is the speed of light having value
Given, Frequency = 1290 kHz = (As 1 kHz = 1000 Hz )
Thus, Wavelength is:
Iodine hexafluoride is the chemical name
Answer:
NaBr
Explanation:
When AgBr is dissolved in water, the following equilibrium is set up in solution;
AgBr(s)⇄Ag^+(aq) + Br^- (aq)
If we dissolve NaBr in the water, a common ion (Br^-) is now introduced into the system. This increases the concentration of Br^- and favours the reverse reaction hence more AgBr is precipitated. This is known as common ion effect.
Copper (Cu) can have two ion charges: +1 and +2. CuF2 is with the +2 charge, copper (II), and CuF is the opposite.
Protons and neutrons are in the nucleus (the center of an atom), but electrons are not.