Water vapor is placed in a balloon and cooled to 50°F. As the water vapor cools it begins to condenses into liquid and the balloon deflates. Which statement best describes how the mass changes during this process?

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.

Significant figures are digits read directly from the measuring instrument plus one more digit, which is __ by the observer.

Anurse used a 0.02-mg/l solution of disinfection to clean a patients wound. what is the concentration of the solution expressed as a percentage?