<h2>D.
They contain the same number of elements.</h2>
Explanation:
The formula (Ba(NO3)2) contains 9 atoms.
1 Barium atom (Ba)
Contains 2 NO3 groups -
2 Nitrogen atoms (N) x 2
6 Oxygen atoms (O3) x 2
3 Elements in total
The formula (Sc(NO3)3) contains 13 atoms.
1 Scandium atom (Sc)
Contains 3 NO3 groups -
3 Nitrogen atoms (N) x 3
9 Oxygen atoms (O3) x 3
3 Elements in total
They do not have the same number of atoms.
They do not have the same number of oxygen atoms.
They do not contain the same number of NO3 groups.
They do have the same number of elements.
Answer:
Explanation:
You calculate the energy required to break all the bonds in the reactants.
Then you subtract the energy needed to break all the bonds in the products.
CH₃CH₂OH + 3O₂ ⟶ 2CO₂ + 3H₂O
Bonds: 5C-H 1C-C 1C-O 1O-H 3O=O 4C=O 6O-H
D/kJ·mol⁻¹: 413 347 358 467 495 799 467
A mirror is opaque, meaning that it reflects the light and images that shine on it's reflective surface.
Answer:
d = endothermic
Explanation:
Chemical equation:
2CO₂ → 2CO + O₂
When carbon dioxide form carbon monoxide and oxygen the ΔH is +570KJ.
When enthalpy of reaction is positive and ΔH is greater than zero it means heat is given to the reaction.
It is called endothermic reaction.
In this case enthalpy of product is higher than enthalpy of reactant
When enthalpy of reaction is negative and ΔH is less than zero it means heat is released during the reaction.
It is called exothermic reaction.
In this case enthalpy of product is lower than enthalpy of reactant.
Answer : The correct option is, (A)
Explanation :
Rate law : It is defined as the expression which expresses the rate of the reaction in terms of molar concentration of the reactants with each term raised to the power their stoichiometric coefficient of that reactant in the balanced chemical equation.
As we are given that:
Rate of disappearing component A =
Rate of appearing component B =
Rate of appearing component C =
The general reaction is:
As per question the stoichiometry relation will be:
Now put the values of rate of following components, we get:
Thus, the stoichiometry relation is:
a : b : c = 2 : 1 : 3
Thus, the required equation will be: