Vermilion, a very rare and expensive solid natural pigment that has been used to write an artist’s signature on works of art, is mercury(II) sulfide. What mass of vermilion can be produced when 55.0 mL of 0.02700 M mercury(II) nitrate is mixed with a solution containing excess sodium sulfide? Vermilion is insoluble in water.

A 8.92 g sample of an aqueous solution of hydroiodic acid contains an unknown amount of the acid. If 11.7 mL of 2.79 M potassium hydroxide are required to neutralize the hydroiodic acid, what is the percent by mass of hydroiodic acid in the mixture?

O Chemical Reactions Standardizing a base solution by titration 3/5 Bis A chemistry student needs to standardize a fresh solution of sodium hydroxide. He carefully weighs out 36. mg of oxalic acid (H2C2O4), a diprotic acid that can be purchased inexpensively in high purity, and dissolves it in 250. mL of distilled water. The student then titrates the oxalic acid solution with his sodium hydroxide solution. When the titration reaches the equivalence point, the student finds he has used 35.1 mL of sodium hydroxide solution. Calculate the molarity of the student's sodium hydroxide solution. Round your answer to 2 significant digits. Ом OP G

How many molecules of hydrosulfuric acid (H₂S) could be reacted by 22.00 ml of 0.135 M sodium hydroxide?

1 What quantity in moles of precipitate are formed when 35.0 mL of 0.350 M CaCl₂ is mixed with excess Na3PO4 in the following chemical reaction? 3 CaCl₂(aq) + 2 Na3PO4(aq) → Ca3(PO4)2 (s) + 6 NaCl(aq) ! Q CEL JUL 25 F1 SABORUMUNE 12 952 2 W F2 # 3 80 E F3 79 $ 4 16 DO 000 F4 R DI % 5 F5 T stv 6 SA MacBook Air F6 Y & 7 F7 U ▶II * 00 8 F8 W 1

A chemist prepares a solution of iron(II) bromide (FeBr,) by measuring out 97.1 mg of FeBr, into a 100. mL volumetric flask and filling to the mark with distilled water. Calculate the molarity of Br anions in the chemist's solution. Be sure your answer is rounded to 3 significant digits. olo mol x10 Ar

You may want to reference (Pages 325-326) Section 8.3 while completing this problem. Part A What volume (in mL) of a 0.125 M HNO3 solution is required to completely react with 25.1 mL of a 0.116 M Na₂CO3 solution according to the following balanced chemical equation? Na2CO3(aq) + 2 HNO3(aq) → 2 NaNO3(aq) + CO₂(g) + H₂O(1) Express your answer with the appropriate units. μĂ V = 11.6464 Submit mL P ? Previous Answers Request Answer X Incorrect; Try Again; One attempt remaining You may have made an improper stoichiometric conversion. According to the balanced chemical equation, each mole of Na2CO3 will react with two moles of HNO3, so the value of 2 should be in the numerator when calculating the volume of the HNO3 solution.

A student soaks willow bark (a natural source of salicylic acid) in ethanol. After a few minutes, the student has 12.5 mL of salicylic acid. The student determines the concentration of salicylic acid is 0.30 M. Calculate the amount, in grams, of acetylsalicylic acid that can be produced when the salicylic acid is reacted with excess acetic acid.

A 11.7 g sample of an aqueous solution of perchloric acid contains an unknown amount of the acid. If 13.5 mL of 3.12 M potassium hydroxide are required to neutralize the perchloric acid, what is the percent by mass of perchloric acid in the mixture?

Hydrochloric acid, HCl, and calcium hydroxide, Ca(OH)2, react with each other in a neutralization reaction.  Suppose that 0.28 mL of 42.3 M HCl solution is needed to neutralize an aqueous solution of Ca(OH)2.  How many grams of Ca(OH)2 must be dissolved in the solution?  The molar mass of Ca(OH)2 is 74.10 g/mol.