Chemistry, 23.09.2021 14:00, datgamer13
1. Carla observes a bright star in the night sky. The star is close to the western horizon. She
records the time the star sets each night for four nights. Her data is shown in the chart.
Star Observations
Night
1
2.
3
4
Time Star Sets
8:44 P. M.
8:40 P. M.
8:36 P. M.
8:32 P. M.
Which sentence describes Carla's observations?
A. The star rotated earlier each night as the sun moved around Earth.
B. The star rotated later each night as the sun moved around Earth.
C. The star rotated earlier each night as Earth moved around the sun.
D. The star rotated later each night as Earth moved around the sun.
Answers: 2
Chemistry, 22.06.2019 14:30, malenacastillo4887
For the reaction shown, find the limiting reactant for each of the following initial amounts of reactants. 4al(s)+3o2(g)→2al2o3(s) a) 1 molal, 1 mol o2 b) 4 molal, 2.6 mol o2 c) 16 molal, 13 mol o2 d) 7.4 molal, 6.5 mol o2
Answers: 3
Chemistry, 22.06.2019 23:30, lizdeleon248
The sum of the oxidation numbers in a neutral compound is always
Answers: 2
1. Carla observes a bright star in the night sky. The star is close to the western horizon. She
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