123 brainliest for best answer + 20 ! a chemist is designing an experiment to investigate the effect of temperature on the rate of a chemical change. suggest a suitable hypothesis for the experiment. also, list the dependent, independent, and controlled variables that can exist in such an investigation.

The dependent variable is the chemical change because it depends on the temperature.

The independent variable is the temperature.

There is no controlled variable that I can identify.

Hypothesis: Depending on the temperature, the rate of the chemical change would increase or decrease.

Hope this helps! :)

Hypothese: "An increase in temperature produces an increase in the speed of a chemical reaction"

An independent variable: Temperature.

A dependent variable: Rate of a chemical change.

Controlled variable: any other factor, that it must be controlled so the experiment is not flawed by other influences.

Explanation:

A hypothesis is an idea or an assumption based on previous information and that allows you to explain the relationship between different facts. In this case the relationship is between the speed of a chemical reaction and the temperature.

The hypothesis is an affirmation, which then, during the investigation, can be confirmed or not.

The hypotheses are simple and easy to understand statements, that is, the objective is to avoid the multiplicity of interpretations. On the other hand it should be able to be applied to more than one case.

Taking all this into account, you can consider as a hypothesis for this case the following:

"An increase in temperature produces an increase in the speed of a chemical reaction"

Independent variables are those variables that you can modify in the course of an experiment in a controlled manner. It is independent because it is not affected by any other variable or condition of the experiment. In this case, the variable that you modify or control to test your hypothesis is temperature, and they do not depend on any other experimental condition. That is why you consider the temperature is considered an independent variable.

Dependent variables are the focus of interest of the person conducting the experiment, it is the condition that must be measured during the process. This is because it depends on the independent variable and its modification. In this case the dependent variable is the rate of the chemical reaction, because it is the variable during the experiment, and it depends on the modifications you make in the temperature (the independent variable) to test the hypothesis.

Controlled variables are variables that remain constant so that they do not unduly affect the way in which the independent variable affects the dependent variable. In this case this would be any other factor, that it must be controlled so the experiment is not flawed by other influences.

answer:

technetium is the most reactive. this is followed by silver. the least reactive out of these three elements is strontium.