Answer:
True.
Explanation:
Hello!
In this case, since the law of conservation of mass and energy states that both mass and energy cannot be neither created nor destroyed, if we want to analyze it in a chemical reaction, it is necessary to realize that the initial reactants are composed by a specific amount of atoms of each element and therefore the products must have that equal amount. For instance, going over the formation of water from hydrogen and oxygen:
We can see hydrogen are equal at both sides whereas oxygen do not; that is why we balance it by putting a coefficient of 2 just before hydrogen and water in order to equal the new 4 atoms of H and 2 atoms of O at each side.
That is why this statement is true.
Hey there!
The pathway will resemble a hill , The minimum amount of energy the reagents need to make the complex activated, is the activation energy , The difference in heights of the products and reactants will be equivalent to the difference in energies.:
ΔH = ( -1,023 kj ) - ( - 935,3 kj )
ΔH = -87.7 Kj
Answer:
2 that is Calcium (Ca) and Manganese (Mn)
Explanation:
Add dithizone in chloroform and look for a red complex formation.
The balanced chemical reaction is written as:
<span>Zn(s) + 2HCl(aq) = ZnCl2(aq) + H2(g)
</span>
We are given the amount of the reactant zinc to be used in the reaction This amount would be the starting point for the calculation. It is as follows:
5.00 mol Zn ( 1 mol H2 / 1 mol Zn ) (2.02 g H2 / 1 mol H2 ) = 10.1 g H2
Therefore, the correct answer is the second option.
