Answer:
The filter that water went through faster is Filter paper
Answer:I'm not completely sure but I think the energy stored in fossil fuels came from the sun and was captured through photosynthesis.
Explanation:
Answer:
<h3>Exothermic Process</h3>
Explanation:
Answer:
The atomic mass of lead is: 207.216 u
Explanation:
data Isotopes mass percent
1 203.97302 1.4
2 205.974444 24.1
3 206.97587 22.1
4 207.97663 52.4
atomic mass = (203.97302x 0.014) + (205.974444 x 0.241) +
(206.97587 x 0.221) + (207.97663 x 0.524)
atomic mass = 2.856 +49.639 + 45.742 + 108.979
atomic mass = 207.216 u