Enthalpy of formation is defined as the heat change that is needed for formation of one mole of substance from its constituent elements in pure state.
In present case, Heat of formation of one mole of C2H6 at <span>101.3 kpa and 298 k is -84 kJ/mol. Negative sign indicates that, heat is evolved from the system.
Thus, for two mole of ethane, heat of formation will be 2 X (-84) = -168 kJ/mol.
</span>
As the
Sodium Ion contains +ve charge so it will interact with the
Oxygen atoms of water molecules. As Oxygen contains partial negative charge it will form intermolecular interaction with sodium Metal. The hydrogen atoms of water will point away from Sodium Ion due to repulsion. The best representation of interaction between Sodium ion (Na⁺) and water molecules is shown below,
Answer:
nitric acid
Explanation:
couse it mix well so that we can create them
Given the reaction in the photo you posted, the particle that is represented by the X will be {30 / 15 P }. The correct answer will be choice number 4 which is located on the graph.