How many main sequence stars are there

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the role of the microscope world in creating new materials .

answer: enthalpy

explanation:

for a exothermic reaction, the energy is released i.e. the energy of the products is lower than the energy of the reactants.

= enthaply

= energy of products

= energy of reactants

as , thus comes out to be negative. negative value of enthalpy shows that the reaction is exothermic.

oxygen, selenium, tellurium, and polonium.

they're all from the same group as sulfur (group 16).