Answer:
The rotation of the Earth.
This compound is Boron selenate. Molar mass of B2(SeO4)3 is 450.4948 g/mol.
Magnesium would be more reactive.
For every meter, the equivalent measurements is 1000 millimeters. Hence in the problem where the number of millimeters is given, we divide the number by 1000 to get the number of meters. The answer here is 0.01123 m.