Se diluyen 50.0 ml de solución acuosa de na2so4 al 8.0%m/v hasta obtener 0.800 l de solución. Calcular concentracion de la solución expresada en m/v y M

0.5%m/V y 0.0352M.

Explanation:

El %m/V se define como la masa de soluto (Na2SO4 en este caso) en 100mL de solución.

La molaridad de esta solución son las moles de Na2SO4 por litro de solución

La solución original se diluye de 50.0mL a 0.800L = 800mL. Esto es una dilución de:

800mL / 50.0mL = 16 veces

Como la concentración original es de 8.0%m/V, la de la dilución será:

8.0%m/V / 16 = 0.5%m/V

Esto significa que en 100mL = 0.1L hay 0.5g. Para hallar la molaridad debemos convertir estos 0.5g a moles con la masa molar del Na2SO4 = 142.04g/mol:

0.5g * (1mol / 142.04g) = 0.00352 moles Na2SO4 en 0.1L:

0.00352 moles / 0.1L =

0.0352M

chemical energy is stored in the chemical bonds of atoms and molecules. it can only be seen when it is released in a chemical reaction. when chemical energy is released, the substance from which the energy came is often changed into an entirely different substance.

this chemical reaction releases energy in the form of light and heat. chemical energy is the potential energy stored in the arrangement of atoms within molecules. breaking chemical bonds requires energy, while forming new chemical bonds releases energy.

the atp molecule can store energy in the form of a high energy phosphate bond joining the terminal phosphate group to the rest of the molecule. in this form,energy can be stored at one location, then moved from one part of the cell to another, where it can be released to drive other biochemical reactions.

hope this !

explanation: