The reaction, Fe2O3 + 3CO------> 2Fe + 3CO2 is an oxidation-reduction reaction.
An oxidation-reduction reaction is a reaction in which there is a change in oxidation number from left to right in the reaction. This is because, a specie is oxidized and another specie is reduced.
In the reaction; Fe2O3 + 3CO------> 2Fe + 3CO2, we can see that the oxidation number of iron decreased from +3 on the left hand side to zero on the right hand side. The oxidation number of carbon was increased from + 2 to +4.
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The anode is zinc, and the cathode is the nail
Answer:
KNO₃ → 1 mol of K⁺ ; 1 mol of nitrate (1 mol of oxygen + 3 mol of nitrogen)
Na₂SO₄ → 2 mol of Na⁺ ; 1 mol of sulfate ( 1 mol of sulfur + 4 mol of oxygen)
Ca(OH)₂ → 1 mol of calcium; 2 moles of hydroxide
(NH₄)₂SO₃ → 2 mol of ammonium; 2 mol of sulfite (1 mol of sulfur + 3 mol of oxygen)
Ca₃(PO₄)₂ → 3 mol of calcium: 2 mol of phosphate (1 mol of phosphorus + 4 mol of oxygen)
Al₂(CrO₄)₃ → 2 mol of aluminum ; 3 mol of cromate (1 mol of Cr + 4 mol of oxygen)
Explanation:
Let's verify all the dissociations:
KNO₃ → K⁺ + NO₃⁻
Na₂SO₄ → 2Na⁺ + SO₄⁻²
Ca(OH)₂ → Ca²⁺ + 2OH⁻
(NH₄)₂SO₃ → 2NH₄⁺ + 2SO₃⁻²
Ca₃(PO₄)₂ → 3Ca²⁺ + 2PO₄⁻³
Al₂(CrO₄)₃ → 2Al³⁺ + 3CrO₄⁻²
<u>Answer</u>:
A single atom of an isotope does not have a(n) Neutron.
<u>Explanatio</u>n:
The lack of neutrons are found to be in an isotope of hydrogen. It has one proton and one electron. This protium has an active ingredient pantoprazole. It is found to be an elective proton pump inhibitor, helps in lowering the acid concentration in the stomach. Being used in the treatment of acid problems in stomach and intestine.it can be abundantly found in the oceans. Protium lacks neutron in the nucleus. It is one among the stable isotope. It is also called as ordinary hydrogen.
Answer : The correct option is, (3) change states of matter.
Explanation :
Latent heat : It is defined as the heat required to convert the solid into liquid or vapor and a liquid into a vapor without changing the temperature.
There are two types of latent heat.
(1) Latent heat of fusion
(2) Latent heat of vaporization
Latent heat of fusion : It is defined as the amount of heat energy released or absorbed when the solid converted to liquid at atmospheric pressure at its melting point.
Latent heat of vaporization : It is defined as the amount of heat energy released or absorbed when the liquid converted to vapor at atmospheric pressure at its boiling point.
Hence, latent heat is used to change states of matter.