5. A 23.9 g piece of metal heated to 97.8 °C is placed in 52.4 g water at 21.9 °C. After the metal is added, the temperature of the water rises to 29.9 °C. Calculate the specific heat of the
metal. Express your answer in the units of cal/g°C.

How many protons, electrons, and neutrons are in each of the following isotopes? a. zirconium-90 b. palladium-108 c. bromine-81 d. antimony-123

Reduction is a reaction which results in a in electrons and a in positive charge of the atom or ion 1) a- loss 1) b- gain 2) a-increase 2) b-decrease

Observation and experimentation have led many scientists to accept a theory about the origin of the universe. this theory is called the big bang theory. scientific evidence collected and observed by scientists around the world suggests that the universe is ever expanding from a hot and dense initial state. what makes this a scientific theory? (2 points)