Please help. Determine the number of moles of PbCl2 in 112 grams of PbCl2.

Select one:
a. 0.40 moles
b. 0.25 moles
c. 1.15 moles
d. 3.10 moles

Determine the number of moles of Na2SO4 in 213 grams of Na2SO4.

Select one:
a. 2.75 moles
b. 3.10 moles
c. 0.33 moles
d. 1.50 moles

Which statement is true about a catalyst? a: a catalyst decreases the rate of the reaction. b. a catalyst is consumed during a chemical reaction. c. a catalyst lowers the activation energy of a reaction. d. a catalyst increases the reactant concentration during a reaction.

Find the missing probability in the table below a.0.10 b.40 c.0.80 d. 0.20

Five different substances are given to you to be dissolved in water. which substances are most likely to undergo dissolution in water? check all that apply. view available hint(s) check all that apply. sodium fluoride, naf octane, c8h18 propanol, ch3ch2ch2oh potassium iodide, ki benzene, c6h6