A mixture of hydrogen and helium gases, at a total pressure of 844 mm Hg, contains 0.464 grams of hydrogen and 0.585 grams of helium. What is the partial pressure of each gas in the mixture

How can you use chemical equations to predict the products of the reaction you can carry out?

Melting and boiling are endothermic processes. this means that these processes absorb energy from their surroundings in order to occur. use this information and the data you collected in the phase change gizmo to describe what happens to the temperature of water when you boil it, then explain why this result occurs.

What happens to isotopes that are unstable?