Which phrases describe space observatories?

1.are telescopes that can images of invisible energy

2.are located on Earth's surface away from areas of light pollution

3.observed electromagnetic radiation that is blocked by our atmosphere

4.observe only electromagnetic radiation that makes it through Earth's atmosphere

5.are large observation decks in space where humans can conduct experiments

If 34.2 grams of lithium react with excess water, how many liters of hydrogen gas can be produced at 299 kelvin and 1.21 atmospheres? 2 li (s) + 2 h2o (l) yields 2 lioh (aq) + h2 (g)

Fill in the coefficients that will balance the following reaction: a0cr2(so4)3 + a1agno3

According to the valence shell electron pair repulsion (vsepr) theory, a molecule that has four electron groups around the central atom will exhibit what electron geometry? view available hint(s) according to the valence shell electron pair repulsion (vsepr) theory, a molecule that has four electron groups around the central atom will exhibit what electron geometry? trigonal bipyramidal tetrahedral square planar determination of electron geometry requires information on whether the electron groups are lone pairs or bonding groups.