Si se tiene una solución de 50mL y 7M ¿cuantos mL se han de añadir para tener una concentración de de 2M?

If you add 5.00 ml of 0.100 m sodium hydroxide to 50.0 ml of acetate buffer that is 0.100 m in both acetic acid and sodium acetate, what is the ph of the resulting solution? acetic acid: ka = 1.8. x 10-5

Calculate the number of kilojoules to warm 125 g of iron from 23.5°c to 78.0°c.

Why does earth rotate? because earth is formed from cold gases collapsing due to gravity because the matter in the nebula that formed earth was spinning because earth forms more than 99% of the mass of the solar system because the hydrogen atoms inside the nebula fused to form helium