What quantity is represented by the metric system prefix deci-

In physical changes, the atoms or molecules that compose the matter do not change their identity, even though the matter may change its appearance. a. True b. False

Phenolphthalein is pink in an aqueous solution having a ph of (1) 5 (2) 2 (3) 7 (4) 12

An alkyne with molecular formula C4H6 was treated with ozone followed by water to produce a carboxylic acid and carbon dioxide. Draw the expected product when the alkyne is treated with aqueous acid in the presence of mercuric sulfate.

Steve, Sarah, Richard, and Kate each run paper chromatography on unknown liquids. Steve gets a red band, Sarah gets a yellow band, Richard gets a green band, and Kate gets a yellow band and a blue band.

Why is fusion nuclear energy currently not widely used as a source of electricity? Fusion reactions have not yet been achieved. Fusion reactions cannot be controlled. Fusion reactions require very high temperatures and pressure.

How does a runoff get polluted.

Anatom that has lewer neutrons than protons and more electrons than protons is

Which can have either a positive charge or a negative charge when they are released during radioactive decay? A. alpha particles B. beta particles C. positrons D. photons

Which ionic compound is water soluble? A. cuS B. NH4NO3 C. SrSO4 D. ZnF

What is part of an experiment that is not being tested and is used for comparison