magnesium is a highly flammable element which is easily combustible in the presence of oxygen: 2mg + o2  --> ? ? + heatwhat is the unknown productmgob)mgo2c)2mgod)mg2o2

Answer is: C) 2MgO.

Balanced chemical reaction:  

2Mg + O₂ → 2MgO + heat.  

1) The same number of atoms is on each side of the equation: two magnesium atoms and two oxygen atoms.

2) In magnesium oxide (MgO), magnesium has oxidation number +2 and oxygen -2, because compound must be neutral.

3) The same mass is represented on each side of the equation: because there is same number of atoms, the mass is the same.

the answer is yes

it has kinetic energy

reason

an object has kinetic energy when you stop the force carrying it, the object will stay in motion.

hope this contact me for more questions if you'd like: )

i believe the answer is 5,000