Shambrey

It took 400 calories of heat to raise 50 mL of water from 20 degrees Celsius to its final temperature. What was that temperature?

A sample containing 4.80g of O2 gas has a volume of 15.0L. Pressure and temperature remain constant. What is the new volume if 0.500 mole of O2 gas is added? Am I converting the 4.80 O2 into moles first? How do I do that?

Is it easier for young women or older women to 'weather' a divorce. I've looked all through my book and cannot find any into pertaining to this question. Please help.

Still trying to figure this out. I have read in my book and can't find anything. This question was actually on my first exam and I'm reviewing for my next one after the break. I don't understand how to set it up. 50 is my mass. Do I use the 400cal as my S...

Thank you!