Answer:
2
Explanation:
The subscript on Ammoniumwhich is (NH4) is 2.
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The answer is surface tension. The water has an inward attraction because there are no molecules above it (I mean water, at least), and the legs of water bugs repel water, hence, they walk on water.
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Answer:
Sound waves and light waves need to change places.
Explanation:
Answer:
The most common chemical properties are flammability and reactivity. Flammability looks very similar to a word that many of you have seen before: flame. In this case, flammability is the ability of a substance to burn or better yet, how easily something burns.
Explanation: