If 50.0 mL of a 0.0500 M HNO3, 50.0 mL of a 0.0700 M KSCN, and 70.0 mL of a 0.0600 M Fe(NO3)3 are combined, what is the initial concentration of Fe3 in the mixture

Plz choose one of the compounds from the table and explain how you know the numbers of atoms in your formula. is it possible for two different compounds to be made from the exact same two elements? why or why not? with a limited number of elements (less than 120 are known), does this mean we also have a small number of compounds or do we have a large number of compounds in this world?

The blackbody curve for a star name zeta is shown below. what is the peak wavelength for this star ?

What is the wavelength of a 3*10^12 hz infrared wave a 3*10^20m b 1* 10^4m c 3*10^-3m d 1*10^-4 m