Ascientist measures the number of flies in a room over time. the results are
shown below.
time (hours) number of flies
10. 35
20. 47
30 52
40. 51
50. 48
60. 40
which of the following statements describes the trend in the data?
o
a. the number of flies increased, then decreased
b. the number of flies was constant.
o
c. the number of flies decreased.
o
d. the number of flies decreased, then increased

Which statement best describes the oxidation numbers of the atoms found in magnesium chloride? a. magnesium has a 2- oxidation number and chlorine has a 1+ oxidation number. b. magnesium has a 2- oxidation number and chlorine has a 2+ oxidation number. c. magnesium has a 2+ oxidation number and chlorine has a 1- oxidation number. d. magnesium has a 1+ oxidation number and chlorine has a 1- oxidation number.

The rate constant for the reaction below is 6.2 x 10−5 mol l−1 s −1. if the initial concentration of a is 0.0500 m, what is its concentration after 115 s?

Which would freeze at a higher temperature: the great salt lake or lake tahoe? a. lake tahoe would freeze at a higher temperature. b. the great salt lake would freeze at a higher temperature. c. both lakes would freeze at the same temperature.