Galaxies Unit Review Practice The universe's galaxies have evolved since what point in time? (1 point)
O 13.8 billion years ago, right after the universe first formed
O approximately 50 million years ago after initial clumps of material were formed
O 23 4 billion years ago, when the universe first formed
O 800 million years ago, when gas concentrations were optimal for galaxy formation

50 pts plz what is the physical state of matter of baking soda.

Darla claims that the first periodic table developed by mendeleev was not completely accurate, so it is not useful at all. harmony argues that it establish the periodic table we use today, making it more credible. who is correct and why? darla is correct, because a model that has any mistakes should be thrown out. darla is correct, because a good model would not need to change. harmony is correct, because mendeleev’s model had all of the information correct in the first version. harmony is correct, because mendeleev’s model made predictions that came true.

Which formula can be used to calculate the molar mass of ammonia (nh3)? molar mass of n + molar mass of h 3 × molar mass of n + molar mass of h molar mass of n + 3 × molar mass of h 3 × molar mass of n + 3 × molar mass of h