A sample of platinum is found to have a mass of 171.2 g, and its volume is 80 cm. Determine the density of platinum.

If a || b and e || f, what is the value of y ?

The density of an unknown gas at 98°c and 740 mmhg is 2.50 g/l. what is the molar mass of the gas with work showed?

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.