A cube has a height of 8 cm and a mass of 457 g. What is its density? O a
Ob
233,984 g/cm
.89g/cm3
1.12 g/cm3
ос

What element breaks down into yttrium-90?

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.

Provide a stepwise curved arrow mechanism that fully explains the outcome of the reaction shown below. oh нао* heat он