the decomposition of water into hydrogen gas h2 and oxygen gas o2 can be modeled by the balanced chemical equation
a) h2 + o2 → h2o
b) h2o → h2 + o2
c) 2h2 + o2 → 2h2o
d) 2h2o → 2h2 + o2

D) 2H₂O → 2H₂ + O₂

Explanation:

Decomposition means water molecules break up into hydrogen and oxygen molecules.

H₂O → H₂ + O₂

We need to balance the equation.  There's one O atom on the left, and two O atoms on the right.  Put a 2 in front of H₂O.

2H₂O → H₂ + O₂

Now there's 4 H atoms on the left, and 2 H atoms on the right.  Put a 2 in front of H₂.

2H₂O → 2H₂ + O₂

The equation is balanced.  There are 4 H atoms and 2 O atoms on either side.

radiation

explanation:

heat is transmitted by radiation

we have been given a quadratic function and we need to restrict the domain such that it becomes a one to one function.

we know that vertex of this quadratic function occurs at (5,2).

further, we know that range of this function is .

if we restrict the domain of this function to either or , it will become one to one function.

let us know find its inverse.

upon interchanging x and y, we get:

let us now solve this function for y.

hence, the inverse function would be if we restrict the domain of original function to and the inverse function would be if we restrict the domain to .