The two ways to measure the sand in a sand castle are by counting the number of pails of sand used to build the castle and by determining the mass of the sand used in building the castle. The first method makes use of the volume of the pail to determine the amount of sand while the second method is a more quantitative way.<span />
Answer:
b) Delta S < 0
Explanation:
The change in the entropy (ΔS) is related to the change in the number of gaseous moles of the reaction: Δn(g) = n(g, products) - n(g, reactants).
- If Δn(g) > 0, the entropy increases (ΔS > 0).
- If Δn(g) < 0, the entropy decreases (ΔS < 0).
- If Δn(g) = 0, there is little or no change in the entropy
Let's consider the following equation.
2 H₂S(g) + 3 O₂(g) → 2 H₂O(g)
Δn(g) = 2 - 5 = - 3. Since Δn(g) < 0, the entropy decreases and ΔS < 0.
Answer:
The oxidation state of Cl in HCIO3 is <u><em>+5</em></u>
Answer:
C) Lighting a matchstick
Explanation:
Mixing an acid and base will cause a neutralization reaction, a type of double displacement.
Photosynthesis is just a series of chemical reactions, but don't deal with the use of O2, but rather it's creation.
Reacting sodium and chlorine would make NaCl in a synthesis reaction.
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