Question

450.0 g of H ₂O is at 54.0 ^oC. It loses ________ kJ of heat to a cooler environment.  
The final temperature is 48.7 ^oC. The specific heat of water is 4.184 J/g·C.   Watch units.
How many kJ of heat did it lose?

		8.02 kJ
		11.5 kJ
		9.98 kJ
		14.0 kJ
		25.2 kJ

12.60 milliliters of a 1.25 M KOH solution are required to titrate 20.0 milliliters of a H₃PO₄ solution. What is the molarity of the H₃PO₄ solution?
3KOH + H₃PO₄ --> K₃PO₄ + 3H₂O  

		0.513 M
		2.52 M
		0.0550 M
		0.728 M
		3.04 M
		0.263 M
		1.45 M
		0.817 M

Answer 1