Which is one advantage of using a reflecting telescope instead of a refracting telescope? O Reflecting telescopes are less expensive.
O Reflecting telescopes produce clearer images.
O Reflecting telescopes require only concave lenses.
O Reflecting telescopes usually take up less space.

the formula would be mgso4

mgso[subscript]4

2h2o2--> 2h2o + o2

this reaction is of the spontaneous decomposition of hydrogen peroxide down into water and oxygen.

add 2 molecules of hydrogen peroxide and 2 molecules of water. since oxygen is naturally diatomic, the total number of atoms of each element is now the same on both sides of the equation so it is balanced.

this may not be entirely correct but let me know.

2b2t

explanation:

2b2t