Calculate the molar solubility of magnesium phosphate, Mg3(PO4)2 (Ksp = 1.0×10–25)


Calculate the concentration of lithium ions in a saturated solution of lithium phosphate, Li3PO4 (Ksp = 3.2×10–9)

Which standards document describes the performance parameters for CEBus control devices?

A. HPNA 1.0

B. ANSI/TIA/EIA 570-A

C. EIA 600

D. ANSI/TIA/EIA 568-B

Which standards document describes the performance parameters for CEBus control devices?

A. HPNA 1.0

B. ANSI/TIA/EIA 570-A

C. EIA 600

D. ANSI/TIA/EIA 568-B

in determining whether an installment contract provides for adequate interest, a mimimim rate of 9% or less is used when the seller financing is no more than what amount

300

500,000

1.0 million

2.8 million

QUESTION 7

1. Calculate the % yield of the following reaction. You have isolated 1.5 g of benzil from the reaction of 1.95 g of benzoin and 1.0 g of ammonium nitrate.

   		75.5%
   		76.9%
   		77.6%
   		78.1%

In a 1.0× 10–2 M solution of CH3NH3Br(aq), identify the relative molar amounts of these species. List them from Most to Least, please.

H₂O

Br^-

CH₃NH₂

CH₃NH₃

OH^-

H₃O⁺

HBr

Estimate the pH of the resulting solution prepared by mixing 1.0 mole of solid disodium phosphate and 1.25 mole of hydrochloric acid. The pKas of phosphoric acid are 2.1,7.2,12.4. The answer is 2.1<pH<7.2. Please explain.

What amount of solid NaOH must be added to 1.0 L of a 0.12 M H2CO3 solution to produce a solution with [H+]= 3.0×10−11 M ? There is no significant volume change as the result of the addition of the solid.