The (triangle)Hrxn of formation of carbon dioxide is negative. Which statement is true? The reaction is endothermic. The reactio
2 answers:
Answer:The reaction is exothermic.
Explanation:
Enthalpy of Formation (): It is defined as change in enthalpy when one mole of substance is formed at standard temperature and pressure from its pure elements under same conditions.
1)
When the energy is released during formation of compound in a chemical reaction that is an Exothermic reaction.
2)
When the energy is absorbed during the formation of compound in a chemical reaction that is an Endothermic reaction
The of formation of carbon dioxide is negative means that the reaction is exothermic reaction.
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Answer:
5*10²⁴ chlorine atoms are found in 8.3 moles of chlorine.
Explanation:
Avogadro's Number or Avogadro's Constant is called the number of particles that make up a substance (usually atoms or molecules) and that can be found in the amount of one mole of said substance. Its value is 6.023*10²³ particles per mole. Avogadro's number represents a quantity without an associated physical dimension, so it is considered a pure number that allows describing a physical characteristic without an explicit dimension or unit of expression. Avogadro's number applies to any substance.
Then you can apply the following rule of three: if 1 mole of the compound contains 6.023 * 10²³ atoms, 8.3 moles of the compound how many atoms does it have?
amount of atoms≅ 5*10²⁴ atoms
<u><em>5*10²⁴ chlorine atoms are found in 8.3 moles of chlorine.</em></u>