Be sure to answer all parts.

The thermal decomposition of phosphine (PH₃) into phosphorus and molecular hydrogen is a first-order reaction:

4PH₃(g)

P₄(g) + 6H₂(g)

The half-life of the reaction is 35.0 s at 680

C.

Calculate the first-order rate constant for the reaction:

s¹

Calculate the time required for 95.0 percent of the phosphine to decompose:

s

Be sure to answer all parts. The thermal decomposition of phosphine (PH3) into phosphorus and molecular hydrogen is a firstorder reaction: 4PH3(g)P4(g)+6H2(g) The half-life of the reaction is 35.0s at 680C. Calculate the first-order rate constant for the reaction: Calculate the time required for 95.0 percent of the phosphine to decompose