Which kind of reaction is shown below?
2h2o2 → 2h2o + o2
synthesis reaction
decomposition reaction
single replacement reaction
double replacement reaction

decomposition reaction

Explanation:-

1. Synthesis is a type of chemical reaction in which two or more than two reactants combine together to give a single product.

2. Decomposition is a type of chemical reaction in which a single reactant gives two or more than two products.

3. Single replacement is a type of chemical reaction in which a more reactive element displaces the less reactive element from its slat solution.

4. Double replacement is a type of chemical reaction in which exchange of ions take place.

it is called acid bonding

in scientific notation, the value of the  speed of light in a vacuum

  will be written as 2.995 * 10^8. when this value is represented in the form of

  a * 10^b, then, a = 2.995 and b = 8.

the value of the speed of light in a vacuum given above can also be rounded up to approximately 300000000. in this case, the scientific notation will be written as 3 *10^8.