13. Given the table representing the subatomic particles in four different atoms:
Atom
Number of Number of Number of
Protons Neutrons Electrons
A
4
4
4
E
5
7
5
G
6
7
6
J
12
12
12
Which atom has a mass of 12 u?
A) A
B) E
C) G
D) J

In this chemical reaction, 325 grams of barium (ba) react completely. how many moles of lithium (li) are produced?

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 you burn 10 kilograms of wood in a fire (combustion) what is the weight of the products after the fire has finished burning the wood?