What is a large celestial body composed of gas and emits light?

Modern weaponry has increased the number of deaths in wars and violent conflicts.

What is the percent composition of ca(oh)2? 37.7% ca, 53.0% o, and 10.3% h 45.5% ca, 38.2% o, and 16.3% h 54.0% ca, 43.0% o, and 2.7% h 64.7% ca, 27.0% o, and 8.3% h

What is the compound name for the formula [ru(en)2cl2]2+ and [co(en)cl2br]-