I NEED HELP ASP For the following compounds please determine the correct subscripts: OsaNb RhcCd The subscripts are a b c d

a-1, b-2, c-1, d-1

Explanation:

Let us look at the first compound- OsN2

Since osmium is in +6 oxidation state and nitrogen is in -3 oxidation state. The valency of the species are 6 for osmium and 3 for nitrogen. They can now exchange valencies and we have Os3N6. Reducing to the lowest term we now have OsN2 as the formula of osmium nitride.

Similarly, rhodium is triply bonded to carbon to form the compound RhC in which the rhodium and carbon share six electrons. There is one sigma bond and two pi bonds between the atoms of rhodium and carbon.

answer: c. the experiment shows that the red substance experienced a chemical change.

explanation: chemical change is the change in which chemical composition of the substance changes. physical change is the change in which there is no change in chemical composition.

chemical changes are accompanied by following changes:

a) precipitate formation

b) energy is released or absorbed

c) formation of bubbles

d) change in color

as it is given that the red color has disappeared and there is production of gas, it means the red substance has undergone a chemical change.

e