Answer:
26.6 s.
Explanation:
For a zero order kinetics, the formula is:
[A] = [A₀] - kt
where,
[A] = amount pr concentration left
[A₀] = initial concentration or amount
k = rate constant
t = time
concentration = mole/volume
[A₀] = 0.5/2.0
= 0.25 M
[A] = 0.25/2.0
= 0.125 M
k = 0.0047 Ms⁻¹
t = ([A] - [A₀]/-k
= (0.125 - 0.25)/(-0.0047)
= 26.60 s.
the amount is reduced by half after 26.6 seconds
Answer:
atom
Explanation:
The sodium atom has a single valence electron that it can easily lose. (If the sodium atom loses its valence electron, it achieves the stable electron configuration of neon.) The chlorine atom has seven valence electrons and can easily gain one electron.
The temperature increases due to CO2. Hence global warming is caused by CO2.
NH3 is a molecule with a nitrogen atom in the middle surrounded by 3 hydrogen atoms bonded covalently. Nitrogen has 5 valence electrons so, it will form sigma bonds (sp3 hybrid orbitals) with each of the hydrogen atom. The remaining lone pair electrons will be situated above the atom. You ca look at this image I've pulled from Google.
