General Chemistry Answers

Carvone is a substance that occurs in two forms having different arrangements of atoms but the same molecular formula (C10H14O) and mass. One type of carvone gives caraway seeds their characteristic smell and the other type is responsible for the smell of spearmint oil. Compute the mass percent of each element in carvone.

Count molar mass of methanoic acid

A compound of a mineral was found to have the percent composition 29.72% O, 24.65% Fe, and 45.63% Cr. Assuming a 100.0 g sample of the mineral, how many grams are made up of oxygen, iron, and chromium, respectively?

How can 3Mg + 2Ni(NO3)3 --> 2 Ni +3 Mg(NO3)2 be written in formula with Roman numerals?

. A person’s blood alcohol (C2H5OH) level can be determined by titrating a sample of blood plasma with a potassium dichromate solution (reaction below). If 35.46 mL of 0.05961 M Cr2O7 2- is required to titrate 28.00 g of plasma, what is the mass percent of alcohol in the blood? Cr2O7 2− (aq) + C2H5OH (aq) → Cr3+ (aq) + CO2 (g) (Not balanced, acidic conditions)

Based on the following reaction; Cl2(g) + NaClO(aq) → NaCl(aq) + ClO2(g) (Not balanced) 2.5 L of Cl2(g) measured at 20.0 °C and 4.12 atm is reacted with 800 mL of 2.30 M NaClO(aq). If 51.8 g of ClO2(g) is obtained, what is the percent yield of the reaction? Determine the limiting and remaining (as gram) reagent? 

A mixture of 50.0 g sulfur and 1.00x102 g of molecular chlorine gas reacts completely to form disulfur dichloride and sulfur dichloride. Find the mass of disulfur dichloride formed and determine the limiting and remaining reagents?

The commercial sulphuric acid solution includes 96.4 % H2SO4 by mass. The density of the solution is 1.84 g/mL. Calculate the molarity of the sulphuric acid solution?

A 5.00 mL aqueous sample containing hydrogen peroxide was diluted to 25 mL and analyzed by titration with permanganate: 2MnO4 − + 5H2O2 + 6H+ → 5O2 + 2Mn2+ + 8H2O The sample required 42.8 mL of 0.0175 M permanganate to reach the endpoint. What is the concentration of hydrogen peroxide in the original sample?

A newly discovered pollutant in fossil fuels was characterized to determine its composition. Elemental analysis shows the presence of carbon, hydrogen, and sulfur elements in the compound. When burned with excess oxygen 0.397 g carbon dioxide, 0.190 g water, and 0.193 g sulfur dioxide were found as products. What is the empirical formula of this compound? If 150 g of fuel contains 3.6 g of this pollutant what is the mass percent of the pollutant in fuel?