Q: Bromine is much less abundant than fluorine or chlorine, but it is easily recovered from seawater, which contains about 65 mg of br per what? Read this paragraph and choose the correct option from the provided answers: electrolysis2NaOH ( aq )+Cl2 ( g )+H 2 ( g ) Bromine is much less abundant than fluorine or chlorine, but it is easily recovered from seawater, which contains about 65 mg of Br per liter. Salt lakes and underground brines are even richer sources; for example, the Dead Sea contains 4 g of Br per liter. Iodine is the least abundant of the nonradioactive halogens, and it is a relatively rare element. Because of its low electronegativity, iodine tends to occur in nature in an oxidized form. Hence most commercially important deposits of iodine, such as those in the Chilean desert, are iodate salts such as Ca(IO3)2. The production of iodine from such deposits therefore requires reduction rather than oxidation. The process is typically carried out in two steps: reduction of iodate to iodide with sodium hydrogen sulfite, followed by reaction of iodide with additional iodate: Equation 22.41. Choices: - pound - foot - gallon - liter A:
liter

(Question)
Q: Pressure is defined as the force per unit area on? Read this paragraph and choose the correct option from the provided answers: Pressure is defined as the force per unit area on a surface. Choices: - weight - gravity - speed - surface A:
(Answer)
surface

Ques: Q: The negative logarithm of the hydroxide-ion concentration of a solution is called? Read this paragraph and choose the correct option from the provided answers: As with the hydrogen-ion concentration, the concentration of the hydroxide ion can be expressed logarithmically by the pOH. The pOH of a solution is the negative logarithm of the hydroxide-ion concentration. Choices: - the hil - the hop - the piel - the poh A:
Ans: the poh

(Q).
Q: What word describes a molecule that repels polar water? Read this paragraph and choose the correct option from the provided answers: The other end of each phospholipid molecule is nonpolar and has no electric charge. This end of the phospholipid molecule repels polar water and is described as hydrophobic, or "water hating. ". Choices: - monophobic - hydrophonic - soluble - hydrophobic A:
(A).
hydrophobic

Ques:Q: What type of light is composed of many rays having random polarization directions? Read this paragraph and choose the correct option from the provided answers: 27.8 Polarization Polarization is the attribute that wave oscillations have a definite direction relative to the direction of propagation of the wave. EM waves are transverse waves that may be polarized. The direction of polarization is defined to be the direction parallel to the electric field of the EM wave. Unpolarized light is composed of many rays having random polarization directions. Light can be polarized by passing it through a polarizing filter or other polarizing material. The intensity I of polarized light after passing through a polarizing filter is I = I 0 cos 2 , where I 0 is the original intensity and is the angle between the direction of polarization and the axis of the filter. Polarization is also produced by reflection. Brewster's law states that reflected light will be completely polarized at the angle of reflection b , known as Brewster's angle, given by a statement known as Brewster's law: reflected light travel and. Choices: - reflected light - polarized light - diffracted light - unpolarized light A:

Ans:unpolarized light

Q: What are made from highly reflective metal that is applied to a curved or flat piece of glass? Read this paragraph and choose the correct option from the provided answers: Mirrors are made from highly reflective metal that is applied to a curved or flat piece of glass. Converging mirrors can be used to focus light headlights, telescopes, satellite TV receivers, and solar cookers all rely on this principle. Choices: - lenses - kaleidoscopes - prisms - mirrors A:
mirrors