Answer:-A. It is less than 890 kJ/mol because the amount of energy required to break bonds is less than the amount of energy released in forming bonds.
Explanation: Endothermic reactions are defined as the reactions in which energy of the product is greater than the energy of the reactants. The total energy is absorbed in the form of heat and 
for the reaction comes out to be positive.
Exothermic reactions are defined as the reactions in which energy of the product is lesser than the energy of the reactants. The total energy is released in the form of heat and for the reaction comes out to be negative.
In the formation of new bonds more energy is released than is required to break the existing bonds, heat is released.
In the formation of bonds less energy is released than is required to break the existing bonds, heat is absorbed.
<em>Suppose a mixture contains two isotopes of fictitious element "A" shown below. 45A and 46A. In the mixture 33% are 45A and 67% are 46A. What is the relative atomic mass for element "A"? Show your work below.</em>
The element A, with 2 isotopes, 45A (33%) and 46A (67%), has a relative atomic mass of 45.67 u.
The fictitious element A has 2 isotopes. 45A with an atomic mass of 45 u and an abundance of 33%, and 46 A with an atomic mass of 46 u and an abundance of 67%. The relative atomic mass (am) for element A is a weighted average that takes into account the mass of each isotope (
) and its abundance (
).
The element A, with 2 isotopes, 45A (33%) and 46A (67%), has a relative atomic mass of 45.67 u.
You can learn more about relative atomic mass here: brainly.com/question/21690748
The answer to this question is B. Prairie Grass if I'm not mistaken. I hope this helps. ;)
I think it’s A it’s showing the par-ten to those certain things how it works
