Answer:
A precipitate forms; the colour changes.
Step-by-step explanation:
The formation of a precipitate a colour change are always signs that a chemical reaction has occurred.
A, B, C, and D are <em>wrong.</em> They are signs of a reaction, but you did not observe them here.
Answer:
200 torr
Explanation:
because it have 250ml when we subtract the 50 we get answer
Answer:
D. It will shift towards the exothermic reaction.
Explanation: