A0.20 mol sample of mgcl2(s) and a 0.10 mol sample of kci(s) are dissolved in water and diluted to 500 ml. what is the concentration of cl in the solution?

(a) 0.15 m
(b) 0.30 m
(c) 0.50 m
(d) 0.60 m
(e) 1.0 m

What is the temperature of 0.750 mol of a gas stored in a 6,850 ml cylinder at 2.21 atm? . 2.95 k 5.24 k 138 k 246 k

Which of the following is an example of physical change not a chemical change? a) a log gives off heat and light as it burns. b) a tree stores energy from the sun in its fruit. c) a penny lost in the grass slowly changes color. d) a water pipe freezes and cracks on a cold night.

How many atomic mass units are equal to 1.672×10−24 g of protons?