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Valentin [98]
3 years ago
5

Katy wrote the following examples of changes in substances. Example A: Butter melts on warm toast. Example B: Drink mix dissolve

s in water. Which statement is correct? Both are examples of physical changes. Both are examples of chemical changes. Example A describes a physical change and Example B describes a chemical change. Example A describes a chemical change and Example B describes a physical change.
Chemistry
2 answers:
FinnZ [79.3K]3 years ago
8 0
A= Physical Change
B=Chemical Change
Rasek [7]3 years ago
5 0

Answer:

Example A describes a physical change and Example B describes a chemical change.

Explanation:

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Upper n subscript 2 (g) plus 3 upper H subscript 2 (g) double-headed arrow 2 upper N upper H subscript 3 (g). At equilibrium, th
artcher [175]

Answer:

The <u>equilibrium constant</u> is:

              k_c=0.0030M^{-2}

Explanation:

The correct equation is:

  •   N₂(g)    +    3H₂(g)    ⇄    2NH₃(g)

Thus, with the equilibrium concentrations you can calculate the equilibrium constant, Kc.

The equation for the equilibrium constant is:

         k_c=\dfrac{[NH_3]^2}{[N_2]\cdot [H_2]^3}

Substituting:

        k_c=\dfrac{(0.105M)^2}{(1.1M)\cdot (1.50M)^3}

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6 0
4 years ago
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larisa86 [58]

Answer:

I think it would be D

Explanation:

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