D that is the correct answer
Answer:
B
Explanation:
Chemical changes would mean changes that does not change in the form of matter.
A) water freezing in a pond is liquid to solid, so form of matter change, so it cannot be this one.
C) A tree buming is solid to gas, so form of matter change, so it cannot be this one.
D) Steam rising from pavement is solid to gas, so for of matter change, so it cannot be this one.
On the other hand B, the matter stays in the same form, solid.
Tree branch to a tree branch.
A molecule with a triple covalent bond is N2
Na would be the best conductor of electricity
<span>
</span>
<u>(1) zmniejszyła się o czynnik 2. </u><span>(2) zwiększona o współczynnik 2. </span>
<span>(3) zmniejszona o współczynnik 200. </span>
<span>(4) zwiększona o współczynnik 200.</span>
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