<u>Answer:</u> The compound that has element ratio of 1 : 1 : 1 is KOH
<u>Explanation:</u>
Mole ratio is defined as the ratio of number of moles of the two elements combining to form a compound.
In a chemical compound, the subscripts represents the number of moles of elements in a compound.
For the given chemical reaction:
has two elements, hydrogen and oxygen and is present in the ratio of 2 : 1
KOH has three elements, potassium, hydrogen and oxygen and is present in the ratio of 1 : 1 : 1
Hence, the compound that has element ratio of 1 : 1 : 1 is KOH
<u>Answer:</u> The mole ratio of H : O in ammonium nitrate is 4 : 3.
<u>Explanation:</u>
We are given a compound named ammonium nitrate having formula
There are 3 elements in this compound which are nitrogen, hydrogen and oxygen.
To calculate the mole ratio, we write the ratio of their subscripts. For this compound, it is:
The mole ratio of H and O for this compound is 4 : 3.
Answer: 22 kJ amount of energy is released in the following reaction.
Explanation: There are two types of reaction on the basis of amount of heat absorbed or released.
1. Endothermic reactions: These are the type of reactions in which reactants absorb heat to form the products. The energy of the reactants is less than the energy of the products.
2. Exothermic reactions: These are the type of reactions in which heat is released from the chemical reactions. The energy of the products is less than the reactants.
Sign convention for : This value is negative for exothermic reactions and positive for endothermic reactions.
For the given chemical reaction,
Energy of the products is less than the energy of the reactants, Hence, this reaction will be a type of exothermic reaction and energy will be released during this chemical change.
Amount of energy released = (350 - 372) kJ = -22kJ
Negative sign symbolizes the energy is being released. So, 22 kJ amount of energy is released in the following reaction.