5) Two people are bitten by the same type of insect. Megan gets a small pin-sized wound, while Dave quickly gets a large, red welt. The MAIN reason for the different outcomes is

How might orange frogs change because of the red fly

Contrast a mixture and a pure substance. In your answer be sure to explain what each is, how you can tell them apart, and supply an example for each.

A filament at which temperature would have the most light absorbed by a piece of yellow glass?

Calculate the atomic mass of silicon. The three silicon isotopes have atomic masses and relative abundances of 27.9769 amu (92.2297%), 28.9765 amu (4.6832%) and 29.9738 amu (3.0872%). Show your work.

Aluminum reacts with chlorine gas according to the following equation: 2 Al (s) + 3 Cl2 (g) → 2 AlCl3 (s) How many moles of Cl2 are required to react with each mole of aluminum? a. 1 b. 0.5 c. 1.5 d. 2.5 e. 2

Most modern forms of transportation are powered by fossil fuels. Carbon dioxide, methane, carbon monoxide, and other gases are released into the atmosphere during the production and combustion of these fuels.

Does the reaction of a burning candle give off or absorb heat

1. Describe the difference between valence and core electrons.

How are deltas and rivers similar?

You plan to separate a polar and a non-polar compound using normal phase column chromatography technique. Methylene chloride (CH2Cl2) and hexanes (C6H14) are the solvents to be used to elute the column. Which solvent should be used first