What is the atomic mass of helium?
1 answer:
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Hello!
The reaction that the graph represents is A. Exothermic because Hrxn=-167 kJ
To calculate Hrxn we apply the following equation:
Looking at the graph, and at the result of the calculations, we can see that the enthalpy of the products is lower than the enthalpy of the reagents, because the sign is negative. That means that the reaction releases energy in the form of heat and that the reaction is exothermic.
Have a nice day!
The reaction that the graph represents is A. Exothermic because Hrxn=-167 kJ
To calculate Hrxn we apply the following equation:
Looking at the graph, and at the result of the calculations, we can see that the enthalpy of the products is lower than the enthalpy of the reagents, because the sign is negative. That means that the reaction releases energy in the form of heat and that the reaction is exothermic.
Have a nice day!
Answer:
Moles of = 6 moles
Explanation:
The reaction of and
to make
is:
⇒
The above reaction shows that 2 moles of Sc can react with 3 moles of to form
Mole Ratio= 2:3
For 10 moles of Sc we need:
Moles of =
Moles of =
Moles of =15 moles
So 15 moles of are required to react with 10 moles of
but we have 9 moles of
, it means
is limiting reactant.
Moles of ScCl_3= 6 moles