If my math is right its A) 7
because 189 divided by 27 is 7
The Doppler effect occurs when a source of sound or light
moves either toward or away from the observer.
Answer:
Explanation:
BeSO₄ + 2NH₄OH → Be(OH)₂ + (NH₄)₂SO₄
In a replacement reaction, an atom or ion substitutes or replaces another in a reaction. We can have single replacement or double replacement reaction.
The above is a double replacement reaction. In this type of reaction, partners are exchanged to form compounds. In a single replacement, one substance is replacing another.
Answer: When work is positive, the environment does work on an object
Explanation:
