What is the vapor pressure of ethanol at 79°C? a. 600 torr
b. 800 torr
C. 750 torr
d. 350 torr

How many moles is 14.5 cm^3 of platinum? the density of platinum is 21.45 g/cm^3.

How do you know when a chemical reaction has occurred

Alidded glass container is filled with a colored gas. after a period of time, it is observed that the gas is uniformly spread throughout the box and that the movement has slowed considerably. next, a warm iron plate is carefully placed under the box. why is there resumed movement of the gas in the container?