What is oxygen gas? this is research assignment that's why you need to write a molecular formula ,physical properties and collection method with diagram of oxygen. pls i need it right now

Use this information to determine the number of calends electrons in the atoms. which of the following correctly compares the stability of the two atoms? a) both are unreactive b) both are highly reactive c) a is unreactive and d is reactive d) a is reactive and d is unreactive

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

Harry lives in a city, and he has a lung condition known as asthma. on certain days, harry has to stay inside because pollutants in the air make it difficult for him to breathe. which of these pollution sources are nonpoint sources that might bother harry if he goes outside? choose the two that apply.