Balance the following DECOMPOSITION chemical reaction: ___Al2O3 (s)--> ___ Al (s) + O2 (g)

a
3, 2, 4
b
4, 3, 2
c
4, 2, 3
d
2, 4, 3

question: ray weighs 100 kilograms, his wrestling partner, bobby, weighs 50 kilograms. if ray moves at 4 m s , how fast will bobby have to run at him to apply an equal amount of kinetic energy?

answer: 8 m/s he needs to run twice as fast to keep up so he has some work to do

explanation:   if the mass has units of kilograms and the velocity of meters per second, the kinetic energy has units of kilograms-meters squared per second squared.

question answered by

(jacemorris04)

just did the assignment and the answer was #1 +2 n

1. a)c-14 has two more protons

2. d)they have different numbers of protons, neutrons, and valence electrons; they are all gases at room temperature.

3. c) iron and nickel.