<h3><u>Answer;</u></h3>
pH = 6.34
<h3><u>Explanation;</u></h3>
pH is given as -log{H+]
But;
pH + pOH = 14
However;
pOH = -log [OH-]
[OH-] = 2.20 × 10−8 M
Thus;
pOH = -log (2.20 × 10−8 M)
= 7.66
But;
pH = 14 - pOH
= 14 - 7.66
<u>= 6.34 </u>
Answer:
17.6kg
Explanation:
mass = Volume × Density
mass = 5000cm^3 × 3.52g/cm^3
mass = 17600g = 17.6kg
Question 4: C
question 5: D
Answer:
b Fuel for fusion reactors can be extracted from ocean water.
Explanation:
The fuel is deuterium, which makes up 0.02% of the hydrogen atoms in water. The oceans contain more than a billion cubic kilometres of water, so that's a lot of deuterium.
a is wrong. The fuel for fusion reactors is deuterium.
c is wrong. There is much research, but there are no large-scale fusion reactors in operation.
d is wrong. Fusion reactors do not produce radioactive waste as spent fuel. Most of the radioactive waste would be the reactor core itself.
