Answer:
2Mg (s) + 
(g) ---> 2MgO (s)
Explanation:
Natural abundance of oxygen I think
Answer:
A telescope, printing press, and microscope
Explanation:
B) Glass Windows..... Hope it helps :)
The student's test average is : 0.92
Total score obtained = 369
Number of tests = 4
Since Each test is exactly 100 points ;
The total score obtainable is (100 × 4) = 400
Average = score obtained / total score obtainable
Average = 369 / 400
Average = 0.9225
Average = 0.92
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