Which one of these chemical equations is already balanced? (Hint: count how many of each kind of atom on each side). You can use scratch paper.
Ca + 202 - 2Cao,
2Ca + 02 - 2Cao
Ca + 0, - Cao
Ca + 20
2Ca + O2

Idon't know hope someone you

Those are different gas lawshere is a brief description of themcharles's law states that volume and temperature are directly proportional to each other as long as pressure is held constant.  boyle's law asserts that pressure and volume are inversely proportional to each other at fixed temperature.gay-lussac's law introduces a direct proportionality between temperature and pressure as long as it is at a constant volume.    source:

The answer is b. because when it leaves the bat, its bringing motion on where its going.