Fission is the splitting of an atom. In a nuclear reaction
Answer:
The coefficients in order are 2, 1, 1
Explanation:
Each side of the reaction needs to have the same number of each element due to conservation of matter.
First I looked at what was uneven, notice there are 2 Na on the left side and 4 Na on the left. The easiest way to fix that is to add a 2 on the Na2HPO4:
2(Na2HPO4)--> Na4P2O7 + H2O
Next take count of each element on both sides to see if the 2 balanced everything:
On the left there are 4 Na, 2 H, 2 P, and 8 O
On the right there are 4 Na, 2 H, 2 P, and 8 O
Since both sides match, you are done!
Answer:
- Rock composition
- Exposed surface area
Explanation:
Although there are other factors involved, I have selected two most important factors that could play a vital role in the resistance of the rock weathering. Here I have discussed each of them briefly.
<em>Rock composition:</em> If a rock is compact and composed of minerals which are not easy to disintegrate by physical as well as chemical weathering, it will increase the resistance of natural rock weathering process. For example, if a rock is composed of high silica content, it will not easy weathered as compared to the rock which is composed of feldspar, calcite, and/or iron. Likewise, igneous rocks are more resistant to the sedimentary rocks because the minerals composition is more compact and dense.
<em>Exposed surface area: </em>If a rock is exposed to the natural environment, it could be weathered more quickly then the rock which is not exposed directly (e.g. underlying rocks). Therefore, covering a rock surface or reducing the surface area could contribute towards increasing resistance of rock weathering. This is the reason that deep underlying rocks stay intact for a longer period of time as compared the those which are exposed.
1 atom Mg, 2 atoms O and 2 atoms H.
1 + 2 + 2 = 5, so correct answer is C