A hydrated salt is a solid that contains water molecules within its crystal structure. During an experiment, a student heats a 9.10 gram sample of a hydrated salt to remove its water. The final mass of the salt is 5.41 grams. What is the percent by mass of water in this crystal?

There are 6.022, 104 atoms of hg in 1 mole of hg the number of atoms in 45 moles of hg can be found by multiplying 4.5 by 6.022, 102 which is the number of atoms in 4.5 moles of hg, correctly written in scientific notation with the correct number of significant figures? 0 21,109 0 21,100 271, 1024 27.099, 100 mark this and retum save and exit submit

What is the empirical formula of c6h18o3? ch3o c2h5o c2h6o c2h5o5

Acompound has a molar mass of 92.02 grams/mole, and its percent composition is 30.4% nitrogen (n) and 69.6% oxygen (o). what is its molecular formula? a. n2o4 b. no2 c. n2o d. n4o2