Answer:
The answer is
<h2>22 g/mL</h2>
Explanation:
The density of a substance can be found by using the formula
From the question
mass of liquid = 44 g
volume = 2 mL
The density of the liquid is
We have the final answer as
<h3>22 g/mL</h3>
Hope this helps you
Answer : The correct option is, (3) Oxidation occurs at the anode and reduction occurs at the cathode.
Explanation :
Electrochemical cell : It is a type of device which is used to convert the chemical energy into electrical energy during the redox reaction.
In the electrochemical cell, there are two electrodes. The electrode on which the oxidation takes place is called the anode (or negative pole) and the electrode on which the reduction takes place is called the cathode (or positive pole). This cell is connected by the salt bridge.
In the external circuit, the electrons flow from the anode (negative pole) to cathode (positive pole) through the voltmeter.
In the inner circuit, the ions flow through the salt bridge.
Hence, the correct option is, (3) Oxidation occurs at the anode and reduction occurs at the cathode.
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:
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Step 3
Explanation:
Step 3 contains a major error.
In step 3, it is stated as molten rocks are heated.
Molten rocks are not heated.
Solid rocks are heated as the plate is pushed down under the earth due to movement of tectonic plates.
When the rock is heated, the rock is melted to become molten.
- The molten rock is called magma.
- When the magma cools, it solidifies to form igneous rocks.
A molten rock is not heated to form igneous rocks.
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Answer:
A coefficient multiplies the number of atoms of each element indicated in a chemical formula. Thus, 2H2O represents four H atoms and two O atoms. ... side to four by placing the coefficient 2 in front of the molecular formula for oxygen
Explanation:
