A laboratory assistant was experimenting with chemical reactions when she combined a small amount of zinc (Zn) with hydrochloric acid (HCl). She discovered that zinc chloride (ZnCl2) [2 should be small and below the Cl] and hydrogen (H2) [2 should be small and below the H] were produced. Which of the following substances are the reactants? PLEASE PLEASE
A. Zn + HCl
B. ZnCl2 + H2
C. Zn + H2
D. ZnCl2 + HCl

Butadiene undergoes a reaction at a certain temperature in the gas phase as follows: 2c4h6(g) --> c8h12(g) the following data were collected for this reaction: time (min) [c4h6] (m) 0 0.36 15 0.30 30 0.25 48 0.19 75 0. determine the order of the reaction and the rate constant. 1st order and k = 4.3x10 -4 s-1 1st order and k = 2.3x10-4 s-1 2nd order and k = 4.3x10-4 s-1 2nd order and k = 2.3x10-4 s-1 zero and k = 4.3x10-4 s-1

What does x represent in the formula for the compound xcl4?

There is a single path for electrons. the current decreases when additional resistors are added. the current will be the same in each resistor. these statements best describe a(n) circuit.