Which sequence of coefficients will balance the following equation? Mg (s) + O2 (g) --> 2MgO (s) A. 4,1,2
B. 1,1,2
C. 2,1,2
D. 3,1,2

Yes it would be a physical change.

You can still be friends with each other. you don't have to date since he likes someone else. just stick to being friends for now

Six base units were recommended: the metre, kilogram,second, ampere, degree kelvin (later renamed kelvin), and candela. in 1960, the 11th  cgpm  named the system the international system of units, abbreviated si from the french name, le système international  d'unités.