What is the pH change (ApH) when 50 ml 0.2 M NaOH is added to 200 ml mixture of buffer solution containing 0.15
Macetic acid and 0.2 M sodium acetate?

a. 3
b.4.44
c.0.1
d.4.54​

At 300 mm hg, a gas has a volume of 380 l, what is the volume at standard pressure

Use this information to determine the number of calends electrons in the atoms. which of the following correctly compares the stability of the two atoms? a) both are unreactive b) both are highly reactive c) a is unreactive and d is reactive d) a is reactive and d is unreactive

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.