Answer:
84.30 mm Hg
Explanation:
In 100 cm³ of solution we have: 40 cm³ C6H6 and 60 cm³ CCl4. Given the densities we can calculate their masses and number of moles, and since by Raoult´s law
Ptotal = XAPºA + XBPºB
where XA= mol fraction =na/(na +nb) and PºA vapor pressure pure of pure component A
m C6H6 = 40 cm³ x 0.87865 g/cm³ = 35.146 g
mol C6H6 = 35.146 g/ 78.11 g/mol = 0.45 mol
mass CCl4 = 60 cm³ x 1.5940 g/cm³ = 95.640 g
mol CCl4 = 95.640 g / 153.82 g/mol = 0.62 mol
mol tot = 1.07
XC6H6 = 0.45/ 1.07 = 0.42 XCCl4 = 0.62/1.07 =0.58
Ptot (mmHg) = 0.42 x 74.61 + .58 x 91.32 = 84.30 mmHg
Answer:
what are the answer choices
Answer:
A detergent consists of an ionic head and a hydrophobic tail.
Explanation:
Cleaning involves the use of a detergent and water. Every detergent possesses a hydrophillic head which is capable of interacting effectively with water thereby helping the detergent to dissolve in water.
It also has a hydrophobic tail, projecting above the water surface, which dissolves the grease. An aggregation of these heads and tails forms large microscopic detergent particles called miscelles. The miscelle is responsible for the cleansing action of the detergent.
B have to be chewed. It's easy because a lot of elderly people don't have teeth/ dentures but even with dentures it's easier not to chew.
C. Also just look up a chemical equation balancer calculator next time.