The principal component of mothballs is naphthalene, a compound with a molecular mass of about 130 amu, containing only carbon and hydrogen. A 3.000-mg sample of naphthalene burns to give 10.3 mg of CO2. Determineits empirical and molecular formulas.

Q: Carbon dioxide is removed from the atmosphere of spacecapsules by reaction with a solid metal…

A: a) The balanced reaction of LiOH with CO2 is as follows: Molar mass of LiOH is 23.95 g/mol Molar…

Q: [2]  a. Write the balanced chemical equation for the reaction. b. Calculate for the mass of…

A:

Q: Aluminum metal is produced industrially in the Hall process by reacting solid aluminum oxide…

A: In the Hall process, the alumina is electrolyzed after pouring it with cryolite in an iron tank…

Q: In a neutralization reaction, 50.00 mL of 0.8500 M phosphoric acid reacts with 2.500 g of magnesium…

A: The answers to the first three questions can be given as - Given Data -

Q: How many molecules of hydrosulfuric acid could be reacted by 2.330 g scandium (III) hydroxide?

A: This problem can be solved by comparing stoichiometric ratio of hydrosulfuric acid and scandium(iii)…

Q: In a car engine, gasoline (represented by C₈H₁₈) does notburn completely, and some CO, a toxic…

A: (a)

Q: Aqueous hydrogen fluoride (hydrofluoric acid) is used to etch glass and to analyze minerals for…

A: a) Solid silicon dioxide (SiO2) reacts with hydrofluoric acid (HF) to produce gaseous silicon…

Q: A 12.3 g sample of an alloy of Mg and Al produces 1.66 mol of H2 when added to excess HCl. What…

A: Given: Total mass of alloy = 12.3 g. And moles of H2 produced = 1.66 mol. Assuming that there are…

Q: Iron forms a sulfide with the approximate formula Fe,Se. Assume that the oxidation state of sulfur…

A: Given that,  An iron sulfide compound with molecular formula = Fe7S8 oxidation state of sulfur = -2…

Q: Write a balanced chemical equation based on the following description: solid tetraphosphorus…

A: chemical equation is the representation of a reaction in which reactants and products are written in…

Q: Excess aluminum nitrate is mixed with 789.6 mL of sodium sulfate at a concentration of 0.679 mol/L.…

A: given balanced reaction, 2Al(NO3)3 + 3Na2SO4 → Al2(SO4)3 + 6NaNO3 volume of sodium sulfate, V =…

Q: An organic compound was found to contain only C, H, and Cl.When a 1.50-g sample of the compound was…

A: Now fisrt we find out the mass of C, H and Cl in the given compounds: Mass of C in CO2 = (3.52g of…

Q: |Solid silver oxide, Ag2O(s), decomposes at tempera- | tures in excess of 300 °C, yielding metallic…

A: The balanced decomposition reaction of silver oxide (Ag2O) at temperature in excess of 3000C can be…

Q: A student places 1.520 grams of copper wire along with excess sulfur into a crucible (and cover),…

A: When Cu reacts with excess S, Cu2S is formed as the product. The corresponding balanced chemical…

Q: A 12.3 g sample of an alloy of Mg and Al produces 1.66 mol of H2 when added to excess HCI. What…

A: Given, Mass of the sample = 12.3 g  Mass of H2 gas produced = 1.66 mole  What is the percentage of…

Q: For the synthesis of boric acid; 7.94 g of anhydrous borax was taken and 15 mL of water was added…

A:

Q: Write the balanced COMPLETE ionic equation for the reaction when aqueous KBr and aqueous A9C2H3O2…

A: Given: Aqueous KBr and Aqueous AgC2H3O2 are mixed in solution to form aqueous KC2H3O2 and solid…

Q: A 12.3 g sample of an alloy of Mg and Al produces 1.66 mol of H2 when added to excess HCl. What…

A:

Q: Write a balanced chemical equation based on the following description: liquid C₇H₈O reacts with…

A:

Q: You have dissolved 5 g of a rock containing a mixture of calcium carbonate and inert sand in 100 mL…

A: Mass of rock = 5g Volume of Solution = 100 mL = 0.1 L Molarity of solution = 1 mole /L Concentration…

Q: A 0.2021 g sample of an organic compound was burned in a stream of oxygen and the CO2 produced was…

A: Given: Mass of organic sample = 0.2021 g Mass of BaCO3 = 0.5995 g Molar mass of BaCO3 = 197.35 g/mol

Q: An aqueous solution of NaF and an aqueous solution of PbCl2 react. Predict what solid will form and…

A: The precipitate is a solid compound that does not dissolve in water.

Q: A supplement was tested for iron content in a laboratory. First, a random sample of 10 tablets…

A: A question based on mole concept that is to be accomplished.

Q: 3. A student mixes 100.0 mL of a 0.100 M solution of potassium phosphate with 100.0 mL of a 0.125 M…

A: We have been asked to write a balanced chemical equation along with physical states of each compund.…

Q: what mass of hydrogen sulphate can be prepared from 50.0 g sulphur dioxide, 15.0 g oxygen, and 980.0…

A:

Q: A 0.1799g sample of an organic compound was burned in a stream of oxygen, and the CO2 produced was…

A: The balanced equation for the above process is : CO2 + Ba(OH)2------------->BaCO3 +H2O The amount…

Stoichiometry

Stoichiometry is a chemical division that evaluates the quantitative content of the chemical process with the help of the reacting molecules or products taking part in the reaction. The term “stoicheion” in “Stoichiometry”, is an old Greek term for "element" whereas “metron” means "measure".