In a controlled scientific experiment, A. all variables are kept constant. B. one or more variables are kept constant. C. no variables are kept constant. D. only one variable can be kept constant. Reset

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.

What is the empirical formula of c6h18o3? ch3o c2h5o c2h6o c2h5o5

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