9. In which case is more heat involved: mixing 100.0-g samples of 90 °C water and 80 °C water or mixing
100.0-g samples of 60 °C water and 10 °C water? As-
sume no heat is lost to the environment.
I know the answer is more heat in the second but why? how?

He table below gives the atomic mass and relative abundance values for the three isotopes of element m. relative abundance (%) atomic mass (amu) 78.99 23.9850 10.00 24.9858 11.01 25.9826 what is the average atomic mass (in amu) of element m? 2.86 5.36 24.30 24.98

If many scientists conduct the same or similar experiments, and all obtain similar results, a can be written, which is a generally agreed-upon statement that explains and predicts how a natural phenomenon works.

Exit what is the density of an object having a mass of 5.0 g and a volume of 45.0 cm3?