( urgent help needed!! 50pts + brainliest ) What particle remains when uranium-238 undergoes alpha decay?

A. thorium-234
B. protactinium-234
C. plutonium-234
D. neptunium-234

If a plot weight (in g) vs. volume (in ml) for a metal gave the equation y= 13.41x and r^2=0.9981 what is the density of the metal?

How many moles of bromine are needed to produce 3.23 moles of potassium bromide

Kp is the equilibrium constant for dissociation of the propionic acid dimer. what is the sign of the slope for a plot of the natural logarithm of kp vs. inverse temperature for this reaction?