It's sp3d according to the lewis dot structure (four bonds, one lone pair).
Answer:
a. absorbs energy as heat and has positive enthalpy of solution.
Explanation:
A reaction can either be exothermic or endothermic. An endothermic reaction, as the dissolution described in the question, is that which absorbs heat energy from the surroundings in order to start the reaction.
Because an endothermic reaction makes heat lost from the surroundings, the enthalpy (∆H) of the solution will be positive (+). ∆H is got by finding the difference between the enthalpy of the reactants and products and since the enthalpy of a product in endothermic reaction is more, the enthalpy change (∆T) will be positive.
Answer:
the atom to become unstable and rip apart.
Explanation:
We define radioactivity as the spontaneous disintegration of atoms. It could occur naturally or artificially.
Artificial radioactivity occurs either by the process of nuclear fusion (combination of two light nuclei) or nuclear fission(bombarding of a heavy nucleus with a small particle such as a neutron).
When a heavy nucleus is bombarded with a neutron, the nucleus becomes unstable and rips apart producing a daughter nucleus/nuclei and more neutrons hence the process continues. This is otherwise called a chain reaction.
The increase on the boiling point of a solvent (water in thiis case) is a colligative property: it is proportional to the number of particles dissolved.
Sodium chloride is a ionic salt with chemical formula NaCl. It ionizes fully into two ions (Na+ and Cl-).
Calcium chloride is a ionic salt with chemical formula CaCl2. It ionizes fully into three ions (one Ca(2+), and two Cl-).
So, the boiling point of the solution with 1 mole of calcium chloride will be higher than the boiling point of the solution with 1 mole of sodium chloride.
Answer:
Explanation:
Hello!
In this case, since the reaction between nitrogen and hydrogen produces ammonia:
We can compute the volume of the container by using the ideal gas law at STP (1 atm and 273.15 K):
Next, since nitrogen and hydrogen are in a 1:3 mole ratio, we understand all the nitrogen and hydrogen are consumed and only ammonia remains at the end of the reaction in the following amount:
Thus, the final pressure turns out:
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