Consider Nal → Na+ + - and the following information. AHlat = -704 kJ/mol
AHhydr of |- = -247 kJ/mol
AH sol = 47 kJ/mol
What is the AHnydr of Na+? Use AH sol=-A Hat + AHhydr.
-998 kJ/mol
O-410. kJ/mol
O-400 kJ/mol
904 kJ/mol

To save time, you can approximate the initial mass of the solid to the nearest ±1 g. for example, if you are asked to add 14.3 g of copper, add between 13 g and 15 g. which of the following sets include two samples with an equal density? which all that apply below 15.4 g gold and 18.7 g silver 15.2 g copper and 50.0 g copper 20.2 g silver and 20.2 g copper 11.2 g gold and 14.9 g gold

Write the symbol for every chemical element that has atomic number greater than 3 and atomic mass less than 12.0 u.

Imagine that you push on a large rock. at what point does your effort change the rock’s mechanical energy?