Which step is the rate determining step?

What type of reaction is the reaction below?  

The image below refers to what type of slope failure?

Identify the following functional groups(s).

A group of nine college students were asked how many hours they slept the previous night. The number of hours they slept are:      7     6     7.25     8.5     5      7      6.75     6    9 [a].  Find the mean.  Round to two decimal places. [b].  Find the median.  Round to two decimal places.    [c].  The standard deviation of the hours slept is 1.24 hours. What is the z-score for the student who slept 7 hours?  Round to two decimal places.      

In a particular suburb, 30% of the households have installed electronic security systems.  If a household is selected at random, what is the probability that this household has not installed a security system? 

The time-dependent deformation of clayey soil is explained using a classic model of a water filled cylinder with a spring at its center. In this example, the spring represents what element of the three-phase model?

The blows per six inches for an SPT test results are reported by your drillers as follows: (A) 50/3″, WOH (B) WOH, 50/3″ (C) 49, 48, WOH (D) 36, WOH You immediately note that one of the SPT N values reported is incorrect. That incorrect SPT N value is A, B, C or D?

Is the reaction represented by the energy diagram below exothermic or endothermic?  

Two data sets yield the following standard deviations.  Which data set is more consistent?   Data set 1:  standard deviation = 5.2                       Data set 2:  standard deviation = 6.1