(b) One homologous series of hydrocarbons is the alkanes. Pentane(C5 H12 ) is an alkane.

(i) When pentane burns completely in oxygen, carbon dioxide and water are produced. Give a chemical equation for this combustion reaction.

(ii) Incomplete combustion can occur when the oxygen supply is limited. Give the names of two products of the incomplete combustion of pentane.

iii) One of the products of incomplete combustion is a poisonous gas. State why this gas is poisonous to humans.

The rules of engagement (roe) working group is often used to (select all that apply.)

Which explanation is true about what happens to a ray of light when it strikes a mirror? a. a light ray is transmitted toward a mirror at a certain angle. the light ray is then reflected by the mirror at an equal angle but in the opposite direction of the transmitted ray. b. an incident ray strikes a mirror at an angle with a line perpendicular to the mirror. the light ray is then reflected at an angle equal to the angle of incidence but on the opposite side of the perpendicular line. c. a reflecting ray strikes a mirror at an angle with a line perpendicular to the mirror. the light ray is then refracted at an angle equal to the angle of the reflecting ray and on the same side of the perpendicular line. d. an incident ray strikes a mirror at an angle with a line parallel to the mirror. the light ray is then transmitted at an angle equal to the angle of incidence but on the opposite side of the parallel line. you so much! : -d take the time to try and answer correctly.

Pegmatites are igneous rocks in which the individual minerals are very large. typically, the minerals are all light-colored quartz, feldspar and muscovite. if you were given a black and white photograph of a pegmatite in a quarry (where the rock has been blasted and broken), what physical properties could you use to identify those three minerals in this hypothetical photo? describe each mineral and the specific diagnostic properties. be specific.