Answer:
chemical change occur when a substance combines with another to form a new substance.
Explanation:
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Answer:
1 mole of MgO contains Avogadro's number of molecules which is 6.023×10^23
molecules.
0.5 mole of MgO will contain 0.5×6.023×10^23
=3.0115×10^23 molecules
Inert gases are also called noble gases. They are the elements found in Group 8A in the periodic table. They are inert because they don't react with other elements. This is because they have the most stable electronic configuration. That's why elements form ions to gain or give way electrons so that they conform with the electronic configuration of the nearest inert gas. Basing on the periodic table, the nearest inert gas to K is Argon. The nearest inert gas to I is Xenon.
Answer:
diphenylmethane is liquid at room temperature.
Explanation:
It is a solid below room temperature and its melting point is at 22 degree celsius to 24 Celsius degree celsius.
