Why is electricity an important part of our daily life

What are atoms of the same element with varying number of neutrons

5g of ammonium nitrate was dissolved in 60g of water in an insulated container. the temperature at the start of the reaction was 23.0°c and at the end it was 19.0°c. calculate the energy absorbed by the reaction.

The diagram shows a series of volcanic island and a hot spot determine the direction of movement of the tectonic plate that for the island