Which of the following human activities could have an irreversible effect on an ecosystem? i. introducing a new species ii. urban sprawl iii. introducing a new chemical iv. over-hunting

The diagram below shows the different phase transitions that occur in matter. which arrow represents the transition in which dew is formed?

According to le chatelier’s principle, a system in chemical equilibrium responds to stress by shifting the equilibrium in a direction that reduces the stress. normalizes the stress. increases the stress. changes the stress.

Which of the following is not true about the atomic model of substances?