The colors emitted by fireworks are products of chemical reactions. These products can be harmful to the environment, that's why, in other countries, it is prohibited to use fireworks, unless during New Year or Christmas. For example, blue fireworks from copper release cancerous dioxins, green sparks come from barium which is radioactive,etc.
Answer:
The CN double bond and triple bond are stronger than the corresponding CC bonds
Explanation:
Answer:
Au
Explanation:
For the density of a face-centered cubic:
where
= molar mass of the compound
avogadro's constant
the volume of a unit cell
Given that:
Density = 19.30 g/cm³
a = 0.408 nm
a =
a =
∴
Thus, the molar mass of 197.37 g/mol element is Gold (Au).
Answer:
The fox who shed their heavy coat in the summer.
Explanation:
If a fox has the ability to shed its coat in the summer, it will have no difficulties adapting to new temperatures even during winter. However, the heavy-coated one will.