I think it is polymer B because polymer B has the same structure and the right elements in the right place.
Answer: A
Explanation: Boiling point increases with the rise of electrons.
Answer:
you should consider waterproofing. depending on the climate in your area, you need to apply multiple layers of waterproofing in the roof for it to support vegetation. you should also confused the types of plants. the types of plants is important for the success of your roof. if you live in a dry area, you don't want to choose plants that can live in dry areas without drying out.
Answer:
3. You should walk fast in moving out.
4. You should stay in the evacuation center. Avoid going back to your car, aftershocks may occur.
5. Do not run
Calcium, sodium and hydrogen