Select all of the correct statements about the relative acid strengths of pairs of acids from the choices below. a. HCl is a stronger acid than H2S because Cl is more electronegative than S.
b. H2SeO4 is a stronger acid than HClO4 because Se is larger than Cl.
c. HClO is a stronger acid than HClO2 because it has fewer oxygens surrounding the central Cl atom.
d. HNO3 is a stronger acid than HNO2 because it has more oxygens surrounding the central N atom.
e. H3PO4 is a stronger acid than H3PO3 because it has more oxygens surrounding the central P atom.
f. HNO2 is a stronger acid than HNO3 because it has fewer oxygens surrounding the central N atom.

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%

a pan containing water is placed in a positio n where it is exposed to a 10 mile per hour wind. the pan contains a uniform depth of 1.27 cm of water, is quite wide, and has a length of 2.44 m in the wind direction. the water in the pan is at a constant temperature of 15.5 °c.

explanation:

a