4. Un elemento consta de dos siótopos. La abundancia de un isotopo es de 95,72% y
su masa atómica 114,9041 uma, la masa
atómica del segundo isotopo es 112,9043
uma. ¿Cuál es la masa atómica promedio
del elemento?​

What is the temperature of one mole of helium gas at stp?

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.

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