Lenses can be found in a variety of objects. Which example does not contain a lens?

A.

a magnifying glass

B.

a telescope

C.

chemical safety goggles

D.

a microscope

Which alkane may be obtained by the reduction of 2-bromo propane

What are the coefficients for the reactants and products in the equation CuCl2 + H2S → CuS + HCl when balanced using the smallest possible integers?

Why do scientists make hypothesis

Elemental cesium reacts more violently with water than does elemental sodium.

For the reaction at equilibrium 2so3 2so2 + o2 (dhºrxn = 198 kj/mol), increasing the reaction temperature would:

Restate Newtons first law in terms of acceleration

Why is burning is not a recommended method of disposing plastics

Why do cells have a plasma membrane? A. to separate protein from the nucleus B. to distinguish plants from animals C. to define the size of the cell D. to separate the inside of the cell from its enviroment

Base on its molecular mass, what is the molar mass of iron

For the following reaction in aqueous solution, identify all those species that will be spectator ions. Select all that apply. Na, SO4+Hg (NO3) 2HSO4+2NaNO3 Choose one or more: A. Hg2S04 B. Na2S04 C. Nat D. NO3 E. SO42- F. Hg2 (NO3) 2 G. NaNO3 H.