Why can’t astronomers take a picture of a black hole?

Which substance has non polar covalent bonds

Imagine one batch of soup (batch “a”) is made with 8.19 g/can of salt, according to the recipe, and a second batch of soup (batch “b”) is made with 8.32 g/can of salt. explain which batch would be more resistant to frost damage if it is shipped a great distance in winter and explain why.

If an atom has 12 protons and 13 neutrons