What is the average atomic mass of an element when 25% of one isotope is 40amu, 40% is another isotope is 45amu, and the remaining isotope is 46amu?

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.

Which symbol can be used to indicate the pressure at which a chemical reaction is carried out? 25°c 2 atm pa

What is the number of neutrons in an atom with atomic mass of 35