Answer:
independent variable -- different batteries
dependent variable -- the time that clock stop
Explanation:
In an experiment or a research study, there are two type of variables that can affect the result of the experiment or the conclusion. They are independent variable and the dependent variable.
An independent variable may be defined as that variable in an experiment which can be changed or can be controlled in the scientific experiment in order to test the effect on the dependent variable. It cannot be changed by other variables.
On the other hand, dependent variable are those are those which can be altered or change that can affect the experiment.
In the context, Emily uses the different types of the batteries as an independent variable and the time where the clock stopped in the dependent variable in her research.
The basic rule of solubility is "like dissolves like". It simply means that polar compounds dissolve with each other, while nonpolar compounds dissolvewith each other. In this case, Cl₂ and CCl₄ are both nonpolar compounds. The dominant intermolecular force in this kind of substance are the <em>dipole forces</em>.
Answer:
The charge on the metal is +2
Explanation:
Taking a good look at the compound zinc nitride, we will notice that it is made up of zinc and nitrogen.
Zinc has a common common oxidation state of +2 while nitrogen has a common oxidation state of -3. When the two atoms combine, the individual charges on them will be +2 for zinc and -3 for nitrogen according to their common oxidation states.
Hence the answer.