Answer:
<u>Copper ( II ) chloride </u>
Explanation:
<em>According to the nomenclature , </em>
- <em>The metal ion name is followed by the non-metal ion</em>
- <em>The oxidation state of the metal is to be mentioned in the brackets .</em>
- <em>As
has two
ions , and the net charge on the compound is zero , the charge on copper is :</em>

thus ,
⇒
∴ ,
The proper nomenclature is :
Copper ( II ) chloride
The more powerful an appliance is, the more amounts of energy it uses. For instance a jack hammer that does not create a lot of destruction or change does not use a lot of energy. If a jack hammer that creates a lot of destruction and change probably uses a lot more energy and makes more sound.
Answer:
1280 mg
Explanation:
Radioactive decay is a phenomenon that occurs when a certain isotope of an element, said to be radioactive, decays, turning into a lighter nucleus and emitting radiation + energy in the process.
The radioactive decay of this isotope of polonium is described by the equation

where
is the amount of polonium left after time t
is the amount of polonium t time t = 0
is the half-life of the polonium, in days (it is the time it takes for the initial element to halve its amount)
IN this problem, we know that:
After t = 560 days, the amount of polonium left is
. Therefore, we can re-arrange the equation, substituting t = 560 d, and solve for
to find the initial amount of polonium:
