Answer:
By using magnet.
Explanation:
Put sand and zinc in the bowl.
Take a magnet an bring it close to the bowl.
The zinc from the sand will be attracted towards the magnet.
In this way it will be separated.
Can you show the chart please
Answer:
vibrations and lots of girls screaming for sure
Explanation: and I dont know if this conts
The charged species carrying the positive and the negative charges are called ions. The ionic compounds formed will be NaCl, Na₂SO₄, MgCl₂, and MgSO₄.
<h3>What are ionic compounds?</h3>
Ionic compounds are the substances formed by the interaction and the bond formation between the ions of the opposite charges. A cation of the ion loses an electron to the anion.
The crisscross method is used to determine the ionic compounds from the respective ions. In Na⁺ and Cl⁻, both have charge of one that got canceled to form NaCl.
In Na⁺ and SO₄²⁻, the charges of the ions are crossed to form Na₂SO₄. With ions Mg²⁺ and Cl⁻ the +2 charge of magnesium crosses with chloride ion to form, MgCl₂. Similarly, Mg²⁺ and SO₄²⁻ cross their charges to form MgSO₄.
Therefore, the ionic compounds formed are NaCl, Na₂SO₄, MgCl₂, and MgSO₄.
Learn more about ionic compounds here:
brainly.com/question/9167977
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Answer:
Explanation:
This question appears incomplete but can however still b answered.
The purpose of the experiment is <u>to test the effectiveness of the new sunscreen</u>.
An independent variable is the variable that is changed (directly or indirectly) during the course of an experiment. The independent variable here are the <u>sunscreen</u>.
A dependent variable is the variable that is been tested in the course of the experiment. The dependent variable here is the <u>redness of the skin</u>.
The first group here (this could be in the missing part of the question, hence response not certain) is the control group. The control group consists of the arms sprayed with the leading/old sunscreen formula.
The second group is the test group. It consists of the arms sprayed with the new sunscreen formula.
The factors that are kept constant (or control variable) are <u>the duration under the sun (4 hrs)</u> and <u>the participants' arms used</u>.
The <u>test group is the second group</u> while <u>the group used for comparison</u> (to be sure the new sunscreen is more effective) <u>is the first group</u>.
