Answer:
Rhombic sulphur and monoclinic sulphur.
Energy is transmitted to the surrounding in an exothermic reaction and this can be understood with the energy diagram of exothermic reaction attached with the answer.
<h3>What is an Exothermic Reaction ?</h3>
When a chemical reaction happens, energy is transferred to or from the surroundings.
When energy is transferred to the surroundings, this is called an exothermic reaction, and the temperature of the surroundings increases.
ΔH value negative –> energy released –> exothermic reaction
This happens because the reactants are at the higher energy state as compared to the products and therefore heat is liberated in the atmosphere to match the difference and therefore heat content in the surroundings increases.
The energy diagram for the exothermic reaction is attached with this answer.
To know more about exothermic reaction
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First one is a
the
second one is b
Answer:
the percentage by mass of Nickel(II) iodide = 23.58%
Explanation:
% by mass of solute = (mass of solute/mass of solution) x 100%
% by mass of NiI2 = (mass of NiI2/mass of solution) x 100%
% by mass of NiI2 = (5.47 grams/23.2 grams) x 100% = 23.58% m/m
100 mL graduated cylinder because the device is more precise.