Complete the following for the chemical formula: 5Ba(OH)2 Number of elements= ?
Number of subscripts= ?
Number of of atoms= ?
What is the coefficient?

A. 1

B. 3

C. 5

D. 15

Agas can holds 2.0 gal of gasoline. what is this quantity in cubic centimeters?

What happened to the amount of carbon dioxide in the atmosphere from 2010–2017?

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.