Which is not a sign that a double displacement reaction has occurred?

question 15 options:

gas may be formed

water may be produced

a precipitate is formed

the coefficients are equal

Miner's coal distributors does not mine coal itself, nor does it even store or handle the coal. instead, miner's solicits orders for low sulfur coal from other firms, then purchases the required amount from suppliers and directs them to ship the coal to its customers. what is miner's

Phosphorous can form an ion called phosphide, which has the formula p3−. this ion can form an ion called phosphide, which has the formula p3−. this ion properties very similar to those of pforms when a phosphorus atom loses three protonsis called a cationcontains 18 electrons

The chemical formula for emerald is be3al2(sio3)6.an emerald can be decided as