Problem PageQuestion Suppose a rhodium atom in the oxidation state formed a complex with one iodide anion and five ammonia molecules. Write the chemical formula of this complex.

[ Rhl(NH₃)₅]²⁺

Explanation:

Symbol of Rhodium atom = Rh

charge of Rhodium in complex = +3

charge on Iodine in complex = -1

Charge on NH₃= 0 (neutral)

Therefore, the total charge on the complex is given as follows;

Charge on complex= +3-1 + 0

                                        = +2

Therefore, the required formula of the complex = [ Rhl(NH₃)₅]²⁺

[Note: Inside the co-ordination complex,metal is written first and followed by negative and neutral ligands respectively and charge on complex is written on the right top of the complex. therefore, the chemical formular of the given complex is given as follows; [ Rhl(NH₃)₅]²⁺

out of these options:

ability to burn paper

pure sodium reacting violently with water

the boiling point of water

helium does not tend to react with anything

i would say this is a physical property:

helium does not tend to react with anything

why? :

i said helium does not tend to react with anything because well, it reacts to ! but ability to burn paper, pure sodium reacting violently with water, & the boiling point of water are chemical or

physical properties: the properties of a substance that can be observed without changing the chemical makeup of the substance

chemical properties: properties of a substance relating to the chemical nature and reactivity of the substance