What is the percent by mass of water in mgso4 • 7h2o? a. 51.1% b. 195% c. 56.0% d. 21.0%

Answer : The correct option is, (A) 51.1%

Explanation :

Mass percent : It is defined as the mass of the given component present in the total mass of the compound.

Formula used :

First we have to calculate the mass of and .

Mass of = 18 g/mole

Mass of = 7 × 18 g/mole = 126 g/mole

Mass of = 246.47 g/mole

Now put all the given values in the above formula, we get the mass percent of in .

Therefore, the mass percent of in is, 51.1%

i just calculated it all out, and not including weekends, and all the different days off. as of this school year (2018-2019) students are spending 2198 hours in school this year

2b2t

explanation:

2b2t