Complete the paragraph to describe the characteristics of a borane molecule (BH3). The Lewis structure and table of electronegativities are given. The bond polarities in BH3 are 
(polar or nonpolar) , the molecular shape is 
(trigonal pyramidal or trigonal planar or tetrahedral or linear or bent), and the molecule is (polar or nonpolar).

Lab reagent, hypothesis test.a reference solution used as a lab reagent is purported to have a concentration of 5 mg/dl. six samples are taken from this solution and the following concentrations are recorded: (5.32, 4.88, 5.10, 4.73, 5.15, 4.75) mg/dl.these six measurements are assumed to be an srs of all possible measurements from solution.they are also assumed to have a standard deviation of 0.2, a normal distributin, and a mean concentration equal to the true concentration of the solution.carry out a significance test to determine whether these six measurements provide reliable evidence that the true concentration of the solution is actually not 5 mg/dl.

Which example is a mechanical wave?     a.microwave    b.radio wave    c.water wave    d.ultraviolet light

Acertain reaction has a activation energy of 54.0 kj/mol. as the temperature is increased from 22c to a higher temperature, the rate constant increases by a factor of 7.00. calculate the higher temperature. c (report only numerical answer)