(2)in a water molecule each hydrogen atom is bonded to the oxygen atom by sharing a pair of electrons
Why does an oxygen atom share two pairs of electrons rather than just one pair?

The pressure in a fluid is affected by which characteristics of that fluid

What substance has a mass of 9.5g and volume of 2.1cm^3

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.