Dan states that a certain layer of the sun is like the brightest street lamp in a city. which layer of the sun is dan referring to? a) chromosphere b) convective zone c) photosphere d) radiative zonethe answer is definitely is photospere. that's is because it is the brightest layer on the sun. also, i took the quiz so its the correct answer. i hope this future students ; p

1. for the first question, we must find the mass of the anhydrous salt, mgso₄. the molar mass for mgso₄·7h₂o is 246.47 g/mol, while that of mgso₄ is 120.37 g/mol.7.834 g mgso₄·7h₂o * 1 mol mgso₄·7h₂o/246.47 g * 1 mol mgso₄/1 mol mgso₄·7h₂o * 20.37 g mgso₄/mol = 0.647 g mgso₄

2. mass of water = mass of sample - mass of anhydrous salemass of water = 7.834 - 0.647 = 7.19 gpercent water in hydrate = 7.19/7.834 * 100 = 91.74%

while cooking a piece of 1/2 pound beef steak, a cast iron pan (2.4kg in weight) was heated 260 celsius.

what is the question here. i think you messed up.