is a white, crystalline solid at room temperature that is soluble in water, has low melting and boiling points, and held together through covalent bonds.

Can someone me with 6 to 10 plz this is for masteries test.

The chemical formula for emerald is be3al2(sio3)6.an emerald can be decided as

Which of the following has expanded our knowledge of the universe beyond our solar system the most? a. manned space travel b. the hubble space telescope c. the pioneer and voyager missions d. the international space station