Water can be separated into its elements. If 20.0 g water is decomposed by this method, how many liters of oxygen gas will be produced assuming STP? 2H2O --> 2H2 + O2
6.23 L oxygen gas
12.4 L oxygen gas
11.2 L oxygen gas
7.00 L oxygen gas
24.9 L oxygen gas

In the analysis of hair and fiber samples, which does a compound comparison microscope allow for that a conventional compound microscope does not? a. simultaneous observation b. polarization c. fluorescence d. higher magnification

Suppose a lab group reports a ppercent yield of sand of 105. is it really possible to collect more sand than was originally represented? what is the possible explanation for the extra product?

If we compare and contrast electromagnetic waves with sound waves, all but one statement is true. that is a) sound waves require a medium to travel while electromagnetic waves do not. b) electromagnetic waves can travel through the vacuum of space while sound waves cannot. c) electromagnetic waves must have a medium in which to travel, but sound waves can travel anywhere. eliminate d) sound waves must bounce off of matter in order to travel while electromagnetic waves do not require matter to be present.