Is table salt dissolved in water a homogeneous or heterogeneous mixture

Calculate the expected ph values of the buffer systems from the experiments (a,b,c,d), using the henderson- hasselbalch equation, ph-pka+log[a-]/[ha]. use for pka values carbonic acid= 6.37, and acetic acid= 4.75.

How do scientists think that gravity affected the formation of our solar system?

Find the number of moles of argon in 364g of argon.