Use blue litmus paper. This is an indicator that can safely determine whether it is a base or an acid by changing color in response to the substance. This color indicates whether it is an acid or a base. Refer to the pH scale to see if the substance is basic or acidic.
The answer is A, the contras x Good luck!! :)
Answer: Yes.
Explaination: While some environmentalists choose to actively support each other (in other words, be environmental activists) a lot of environmentalist help keep the environment healthy without continuously or actively supporting the cause. For example, some people quietly take care of the environment while keeping to themselves, while others spread awareness, fund organizations, and help keep the environment clean by making an impact.
Answer:
Nitrogen gas is a homogenous mixture!