what is the concentration of a after 39.5 minutes for the reaction of a to products when the initial concentration of a is 0.750?

If 1.63 times 10 negative 4 of helium dissolves in 100.0g of water, what is the concentration in parts per million

Asample of neon occupies a volume of 375 ml at stp. what will be the volume of neon if the pressure is reduced to 90.0 kpa? a. 422 ml b. 422 l c. 333 ml d. 333 l

Based on the equation and the information in the table, what is the enthalpy of the reaction?