"Old pH = 4.72"; "New pH = 4.70" > The strategy to follow is a) Write the chemical equation for the buffer. b) Calculate the "pH" of the buffer. c) Calculate the moles of "HCl" added. d) Calculate the …

11 and 16 First, write the problem in the form of a system of equations: 27 = x + y x = 2y - 6 Next, using substitution, combine the two equations replacing x in the first equation with the value of x in the …

You need to know the standard change in entropy as well. The standard change in Gibbs free energy can be calculated using the equation color (blue) (ul (color (black) (DeltaG^@ = DeltaH^@ - T * …

Explanation: Use trig identity: #sec^2 t= (1 + tan^2 t)# In this case: # (2 + 2tan^2 t) + 3tan t - 1 = 0# #2tan^2 t + 3tan t + 1 = 0# Solve this quadratic equation for tan t. Since a - b + c = 0, use shortcut. …

A mole of gasoline will get you 1,303 kcal of energy. If we, somehow, figure out the number of moles of gasoline in 3 gallons, we'd be able to know the answer. Step 1: First of all, there are 11,355 ml in 3 …

See the answer below: Credits: 1. Thanks to the web site www.integral-calculator.com that gave us the direction to be followed to solve this integral! 2. Thanks to the website www.symbolab.com that …

Nov 4, 2017 · The nickel:zinc:copper ratio of 3:4:13 tells us that XXX for every 3 units of nickel, XXX there will be 4 units of zinc, and XXX there will be 13 units of copper. That is, out of a total of 3 +4 + …

Feb 11, 2018 · (1,1.5) Let's rewrite this into form 4p (y-k)= (x-h)^2 y=1/2 (x-1)^2+1 =>y-1=1/2 (x-1)^2 =>2 (y-1)= (x-1)^2 We now compare this to 4p (y-k)= (x-h)^2 2 (y-1)= (x-1)^2 4p (y-k)= (x-h)^2 It …

May 7, 2016 · Given tax rate imposed ( 2nd line down in question) on income over $20700 and less than $38000.

Feb 12, 2016 · Atomic size decreases across the period because of EFFECTIVE NUCLEAR CHARGE. As you add on more and more electrons, you also add on more and more protons. Because of this, …