If I put an ice cube made with tap water in a room with a temperature of 68 degrees Fahrenheit, then it will melt in less than 30 minutes. What is the independent variable?
What is the dependent variable?
What is the controlled variable?

The characteristic of two different types of reactions are shown below. reaction a: electrons are gained by the atoms of an element. reaction b: protons are lost by the atom of and element. which statement is true about the atoms of the elements that participate in the two reactions? a: their identity changes in both reaction a and b. b: their identity changes in reaction a but not b. c: their identity changes in reaction b but not a. d: their identity remains the same.

If a solution had a ph of 7 what is the solution

From the options provided for each element below, choose the properties that it may have based on its location in the periodic table fluorine (f): highly reactive nonmetal shiny a conductor