Answer:
to help demonstrate what they're doing
Explanation:
Answer:
[H₃O⁺] = 7.08×10⁻⁹ M
Explanation:
pH = - log [H₃O⁺]
[H₃O⁺] = 10^⁻pH
Therefore, [H₃O⁺] = 10⁻⁸¨¹⁵
[H₃O⁺] = 7.08×10⁻⁹ M
Hello there.
<span>
Some elementary particles are positively or negatively
</span><span>
b. charged particles.
</span>
Answer:
In physics, a conservation law states that a particular measurable property of an isolated physical system does not change as the system evolves over time. Exact conservation laws include conservation of energy, conservation of linear momentum, conservation of angular momentum, and conservation of electric charge.
Explanation:
hope this helps :)
Answer:
4NH₃ + 5O₂ → 4NO + 6H₂O ΔH = -904 kj
Explanation:
Given data:
Energy evolved when one mole of NH₃ react = 226 kj
Energy evolved when 4 mole of NH₃ react = ?
Solution:
Chemical equation:
4NH₃ + 5O₂ → 4NO + 6H₂O
It is stated in question that when one mole of ammonia react 226 kj energy evolved.
When 4 moles react energy evolved is,
1 mol = -226 kj
4 mol × -226 kj / 1mol
-904 kj
when 4 moles of ammonia react 904 kj energy is evolved.
Complete thermal equation:
4NH₃ + 5O₂ → 4NO + 6H₂O ΔH = -904 kj