Anyone in for role playing?- qwq- bio down below, have nothing nice to say, don't say anything and just ignore this -n- Age: 15~Gender: Female~sexuality: Bisexual(usually men)~name: Selina~ About me: I'm kinda childish for my age, i have adhd, i'm adorable u3u, I like hardcore stuff >/<, if you have questions, ask! ^^ P. S- I'm also a switch, usually bottom.★~(◡︿◕✿) (◠﹏◠✿)

you weirdo this website is for education purposes

Explanation:

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 corroding iron, if that's one of your choices