Elements named after celestial bodies are the following.
1.Element 34 (Selenium) is named after the moon. Selene is Greek for moon
2. Element 2 (Helium) is named after the sun. Helios is Greek for sun.
3. Element 52 (Tellurium) is named after the earth. Tellus is the Latin word for earth.
4. Element 80 (Mercury) is named after the planet Mercury. The name Mercury is also a name of a Roman god.
5. Element 92 (Uranium) is named after the planet Uranus.
6. Element 93 (Neptunium) is named after the planet Neptune.
7. Element 94 (Plutonium) is named after the planet Pluto.
<span>The negative impact of chemistry have on society through the
production and use of chlorofluorocarbons (CFCs) is that lower levels of ozone
allowed more ultraviolet radiation to reach Earth. CFC is an organic compound
which is used refrigerants, propellants and solvents.</span>
Answer:
Chemical Formula
Explanation:Manganese(II) sulfate is a metal sulfate in which the metal component is manganese in the +2 oxidation state. It has a role as a nutraceutical. It is a metal sulfate and a manganese molecular entity. It contains a manganese(2+).
<span>Steel rusts, aluminum doesn't so the steel can would be rusty and the aluminum can would not.</span>
Answer:
0.24 mol/L.
Explanation:
- Ca(OH)₂ dissociates in solution according to the equation:
<em>Ca(OH)₂ → Ca²⁺ + 2OH⁻.</em>
<em></em>
Every 1.0 mol of Ca(OH)₂ dissociates to give 2.0 moles of OH⁻.
∴ The no. of moles of OH⁻ produced from 0.06 mol of Ca(OH)₂ = (2 x 0.06 mol) = 0.12 mol.
<em>∴ [OH⁻] = no. of moles / V of the solution</em> = (0.12 mol)/(0.5 L) = <em>0.24 mol/L.</em>
