True or False? in single displacement reactions, changes in the charges of the reactants occur

A student places 1.520 grams of copper wire along with excess sulfur into a crucible (and cover), which weighs 18.030 g empty. The contents are heated mildly for five minutes to allow all the copper to react. The contents are then heated to glowing red heat for another five minutes to remove excess sulfur. The crucible and contents are cooled to room temperature. Calculate the mass of the excess sulfur (prior to its removal) if 0.4546 g of sulfur was put into the crucible at the start of the reaction. Molar Mass Cu: 63.55 g/mole Molar Mass S: 32.10 g/mole

Write a balanced equation for the reaction of nitric acid, HNO3(aq), with magnesium hydroxide, Mg(OH)2(aq). Include physical states.

4.84. Aluminum chloride (AICI3) is used as a catalyst in the production of polyisobutylene, which is used in automobile tires. Scrap aluminum metal reacts with chlorine gas (Cl,2) to produce AICI; . Suppose that 2.70 g of Al and 7.10 g of Cl2 are mixed. What is the maximum mass of AlCl, that could be formed?

In a chemical reaction, the substances present after the chemical change are called reactants.  True  False

"Carbon dioxide gas and liquid water are produced when gaseous carbon tetrahydride reacts with oxygen gas." What type of chemical reaction is this?   Synthesis   Combustion   Decomposition   Single Displacement   Double Displacement

Which option correctly describes the reactants and products of a chemical reaction? The mass of the reactants can be more or less than the mass of the products. The total number of moles of the reactants must be equal to the total number of moles of the products. The mass of the reactants can be more or less than the mass of the products. The total number of moles of the reactants can also be more or less than the total number of moles of the products. The mass of the reactants must be equal to the mass of the products. The total number of moles of the reactants can be more or less than the total number of moles of the products. The mass of the reactants must be equal to the mass of the products. The total number of moles of the reactants must also be equal to the total number of moles of the products.

Consider the following chemical reaction HCl (aq)  + HgNO3 (aq) à Hg2Cl2 (s) + HNO3 (aq) If 20.0 grams of HCl is mixed with 30.0 grams of HgNO3     Determine the excess reactant   The amount of the solid precipitate that was recovered equals to .................. grams , if the percentage yield from this reaction was determined to be 78.4%. Write the net ionic equation for the chemical reaction   Determine the type of this chemical reaction

Answer the following questions about acetylsalicylic cid, the active ingredient in aspirin. (a) The amount of acetylsalicylic acid in a single aspirin tablet is 325 mg, yet the tablet has a mass of 2.00g. Calculate the mass percent of acetylsalicylic acid in the tablet. (b) The elements contained in acetylsalicylic acid are hydrogen, carbon, and oxygen. The combustion of 3.000g of the pure compound yields 1.200 g of water and 3.72 L of dry carbon dioxide, measured at 750 mm Hg and 25 degrees Celsius. Calculate the mass, in g, of each element in the 3.000g sample. (c) A student dissolved 1.625 g of pure acetylsalicylic acid in distilled water and titrated the resulting solution to the equivalence point using 88.43 mL of 0.102 M NaOH(aq). Assuming that acetylsalicylic acid has only one ionizable hydrogen, calculate the molar mass of the acid.

Write the balanced NET ionic equation for the reaction when aqueous calcium chloride and aqueous lead(II) nitrate are mixed in solution to form aqueous calcium nitrate and solid lead(II) chloride. 04- 3- D²- 134 口4 1. 6 7. 口。 国。 (s) () (aq) C CI Pb Ag H. Ca 1L 3.