Observation of product Flaky and light gray Solid Mass of product and crucible 31.970g Mass of crucible (from first data table) Mass of product (show calculation).

When copper is heated with an excess of sulfur, copper(I) sulfide is formed. In a given experiment, 1.50 g of copper was heated with excess sulfur to yield 1.79 g copper(I) sulfide. What is the percent yield?

Write a balanced chemical equation for each of the following.  Express your answer as a chemical equation. Identify all of the phases in your answer.   a. Solid lead(II) sulfide reacts with aqueous hydrochloric acid to form solid lead(II) chloride and dihydrogen sulfide gas. b. Gaseous carbon monoxide reacts with hydrogen gas to form gaseous methane (CH4) and liquid water.         c.Solid iron(III) oxide reacts with hydrogen gas to form solid iron and liquid water.         d.Gaseous ammonia (NH3) reacts with gaseous oxygen to form gaseous nitrogen monoxide and gaseous water.

A 0.206 g piece of solid magnesium reacts with gaseous oxygen from the atmosphere to form solid magnesium oxide.  In the laboratory a student weighs the mass of the magnesium oxide collected from this reaction as 0.254 g. What is the percent yield of this reaction?

Assume that your empty crucible weighs 15.98 g, and the crucible plus the sodium bicarbonate sample weighs 18.56 g. After the first heating, your crucible and contents weighs 17.51 g. After the second heating, your crucible and contents weighs 17.50 g. Answer the following questions based on this information.

One technique used in industry to extract gold from gold sulfide is reacting it with hydrogen gas. In the process, solid gold and hydrogen sulfide gas form. If 337.75 g of gold(III) sulfide is completely reacted in the process, what mass of gold will be produced?

For the following reaction, 11.2 grams of glucose (C6H1206) are allowed to react with 15.5 grams of oxygen gas. glucose (C6H1206) + oxygen---> carbon dioxide + water What is the maximum amount of carbon dioxide that can be formed? Mass= __ g What is the FORMULA for the limiting reactant? What amount of the excess reactant remains after the reaction is complete? Mass= g

Chromium metal can be produced from high-temperature reactions of chromium (III) oxide with liquid silicon. The products of this reaction are chromium metal and silicon dioxide. If 8.21 grams of chromium (III) oxide and 4.11 grams of Si are combined, determine the total mass of reactants that are left over.

When copper is heated with an excess of sulfur, copper(I) sulfide is formed. In a given experiment, 1.50 g of copper was heated with excess sulfur to yield 1.80 g copper(I) sulfide. What is the percent yield?

Your crucible has a mass of 30.074 g when empty, and does not change upon heating. You add some solid iron and then weigh the crucible and iron to be 32.860 g together. You then burn the iron in the presence of oxygen following the procedure in the handout. Assume that there are no contaminates and all of the iron is converted to iron oxide. The final mass of the crucible and iron oxide is 33.961 g, which does not change upon heating. The unrounded empirical formula obtained from these measurements would be FeOX, where X is a decimal type number (not necessarily a whole number). Give the value of X in the blank below in decimal format with the correct number of significant figures.Answer: ________