An experiment is performed in which a crystalline substance is added to a beaker filled with room-temperature water. The following observations were made: 1. The crystals dissolve.
2. A precipitate forms.
3. The bottom of the beaker feels warm to the touch.
4. Bubbles begin to form in the water.
Which observations are evidence that a chemical reaction took place?
Give a explanation.

Emma lives on a tight budget. she saves money and also makes intelligent choices when spending it. which statements describe emma's financial skills? select three options.emma is more prepared to meet her basic needs.emma is better prepared to avoid financial setbacks.emma is better able to avoid accumulating assets.emma is more prepared to face emergencies.emma is better able to avoid financial decision-making.