The gas phase decomposition of phosphine at 120 °C PH3(g)1/4 P4(g) + 3/2 H2(g)

is first order in PH3.

During one experiment it was found that when the initial concentration of PH3 was 0.0542 M, the concentration of PH3 dropped to 0.00851 M after 68.0 s had passed.

Based on this experiment, the rate constant for the reaction is
s^-1. (I need specific instructions on how to solve this problem with a simple scientific calculator please!!)

How do temperature and salinity affect deepwater currents? as temperatures and salinity levels of water increase, the water rises to the surface where it creates currents as it moves to colder regions. they create changes in wind direction, moving denser water in the same direction as the wind and causing the deepwater circulation patterns found in the ocean. they equalize the forces on undersea currents caused by the coriolis effect as they replace more dense water with less dense water. they create density differences that cause dense deepwater currents to flow toward the equator where they displace less dense, warmer water above them.