What is the names of these alkynes ?

What element breaks down into yttrium-90?

Why does the sun appear to be the brightest star in the sky? a- its apparent brightness is much greater than other stars. b- it burns more gas, making it brighter than any other star. c- it is the largest star in the galaxy, so it is the brightest star. d- its relative distance to earth is closer than the other stars.

If 1.8 l of water is added to 2.5l of a 7.0 m koh solution, what is the molarity of the new solution