8) In science lab, Sue estimated that there were 140 amoebas under her microscope, but there were actually 150. What was the percent error of her estimate?

A) 6.7%

B) 8.3%

C) 9.4%

D) 10%

Benzyl chloride, though a primary halide, readily forms a precipitate when trested wirh 2% ethanolic silvee nitraye. explain

The electronegativities for the elements vary from 0.7 for cesium to 4.0 for fluorine. The electronegativity for iodine is 2.5.

Which are homogeneous mixtures? Check all that apply. vinegar trail mix orange juice with pulp sugar water sand soda pop in a sealed bottle

Which materials are made of more than one element

Chemical reactions can be recognized by the presence of heat, light, or gas formation. The ultimate outcome for any chemical reaction is the ... a) change from solid to a liquid b) presence of sound c) formation of a new chemical substance

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.