What is the mass, in g, of 0.500 mol of 1,2-dibromoethane, ch2brch2br?

ar (h) = 1; ar (c) = 12; ar (br) = 80

a. 23.5

b. 47.0

c. 94.0

d. 188

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 did planetesmals form planets? a. they broke apart into smaller chunks.b. they collided and stuck together.c. they cooled and pulled ice together.d. they began to rotate.

Idon’t know how to solve this question