Me with this questions and give a brief explanation > _< i don't understand or get what it means :

The answer to your question is: No, this equation is not balanced.

Explanation:

To know if a equation is balanced, we must know the Lavoisier law of conservation of mass that states that " In an isolated or closed system, matter can not be created or transform".

This means that that matter in the reactants is equal to the mass in the products.

Equation

                            S  +  3O₂   ⇒   SO₃

                           Reactants         Products

                            1 sulfur               1 sulfur

                            6 oxygens         3 oxygens

As the amount of oxygens in the reactants is higher than in the products, the equation is not balanced.          

h

some sources quote the lethal dose, for an average 170lbs opiate-naive individual is between 75 and 375 mg