What is the total pressure exerted by the mixture of l dm3 of oxygen at 320 mmHg? 1 dm3 of nitrogen gas at 230 mmHg

While unproven, it uses facts to support part of a conclusion. it is still factual and has predictive power, however.

Ithink it's the third answer

Try adding 700% because of the x in y

We are not here to write essays for people. this is something that you decide and share your opinions on yourself. just do some brainstorming and if all else fails just make something up.