2. If a student holds the Moon sphere out in front of her at arm's length, will the distance between the Moon sphere and her head be "to scale"? I WILL GIVE BRAINLIEST

The mass of a neutron is equal to the mass of a proton plus the mass of an electron. true or false false true

What are the first three quantum numbers for the electrons located in subshell 2s?

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.