The law of conservation of mass states that in a chemical reaction the mass of the reactants
equals the mass of the products. Based on this information, what mass of hydrogen (H2)
was produced in this reaction?

A. 2 g

B. 4 g

C. 72 g

D. 144 g

please leave an explanation
thank you!

What type of reaction is illustrated? 2c12o5 = 2cl2 + 502

Why did southern business leaders want to increase the number of slaves

Two people each hold the end of a rope and create waves by moving their arms up and down. this wave is best classified as a transverse wave because a) both the rope particles and the wave are moving in the same direction. b) the wave is moving up and down as the particles of the rope move horizontally. c) the wave is moving horizontally as the particles of the rope move up and down. eliminate d) the wave is moving in a parallel direction with the motion of the person's arms.