Question 5 (5 points) (08.02 LC)
Which of the following is the correct formula to calculate percent by mass? (5 points)
[Mass of solution (g) + mass of solute (g)] x 100
Oь
[Mass of solute (g) - mass of solution (g)] x 100
O
[Mass of solute (g) = mass of solution (g)] x 100
Od
[Mass of solution (g) = mass of solute (g)] x 100

What is the formula that this ionic compounds could form sr2+p3-o2-

The characteristic of two different types of reactions are shown below. reaction a: electrons are gained by the atoms of an element. reaction b: protons are lost by the atom of and element. which statement is true about the atoms of the elements that participate in the two reactions? a: their identity changes in both reaction a and b. b: their identity changes in reaction a but not b. c: their identity changes in reaction b but not a. d: their identity remains the same.

How many moles of sulfuric acid (h2so4) are needed to react completely with 6.8 moles of lithium hydroxide (lioh)? 2lioh + h2so4 → li2so4 + 2h2o a. 3.4 mol h2so4b. 6.8 mol h2so4 c. 10.2 mol h2so4 d. 13.6 mol h2so4