Question 8 a chemist determined by measurements that moles of barium participated in a chemical reaction. calculate the mass of barium that participated in the chemical reaction.

Which of the following pairs of elements belong to the same groupa. h and he b. li and bec. c and pb d. ga and ge

Newtons second law deals most cosely with

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.