Which of the following statements is true of spreadable margarines made from polyunsaturated oils?
a. they are less resistant to damage from oxidation.
b. they have more points of unsaturation than the original oil.
c. they have a high smoking point, so they are suitable for frying foods at high temperatures.
d. they are made by forcing oxygen through the oil.
e. they are made by dehydrogenating saturated fats.

Name the element in group 17, period 2. (periodic table)

What is the ph of a 0.0010 m hno3? 1.0 3.0 4.0 5.0

Answer asap need to be answered by wednesday morning explain how a buffer works, using an ethanoic acid / sodium ethanoate system including how the system resists changes in ph upon addition of a small amount of base and upon addition of a small amount of acid respectively. include the following calculations in your i. calculate the ph of a solution made by mixing 25cm3 0.1m ch3cooh and 40cm3 0.1m ch3coo-na+. [ka = 1.74 x 10-5 m] ii. calculate the ph following the addition of a 10cm3 portion of 0.08 m naoh to 500cm3 of this buffer solution. iii. calculate the ph following the addition of a 10cm3 portion of 0.08 m hcl to 200cm3 of the original buffer solution.