Prior to their phaseout in the 1980s, chemicals containing lead were commonly added to gasoline as anti-knocking agents. A 4.887 g sample of one such additive containing only lead, carbon, and hydrogen was burned in an oxygen-rich environment. The products of the combustion were 5.319 g CO2(g) and 2.722 g H2O(g). Determine the empirical formula of the gasoline additive.

Lead ions can be precipitated from solution with KCl according to the reaction: Pb2+ (aq) + 2KCl(aq) → PbCl₂ (s) + 2K+ (aq) When 34.3 g KCl is added to a solution containing 25.8 g Pb²+, PbCl2 (s) forms. The solid is filtered and dried and found to have a mass of 30.9 g. theoretical yield of PbCl2 = 25.8 g Ph Part C % yield = Determine the percent yield for the reaction. Express your answer in percent to three significant figures. 15 ΑΣΦ X Ċ 1 mel P5²+ 1 mol 1 met X 207.2 g Pb² ? %

Ethane is a gas similar to methane that burns in oxygen to give carbon dioxide gas and steam. The steam condenses to form water droplets. The chemical equation for this reaction is C2H6 + O2 → CO2 + H2O. Balance this equation.

Predict the reactants of this chemical reaction. That is, fill in the left side of the chemical equation. Be sure the equation you submit is balanced. (You can edit both sides of the equation to balance it, if you need to.) Note: you are writing the molecular, and not the net ionic equation. [] → Ba(C1O₂)₂(aq) + H₂O(1) 2 X G

Honors Chemistry Chapter 9 Name/Date 3. Gold is very valuable because it does not oxidize easily. It can be oxidized by reacting it with nitric acid as shown below: Au(s) + 4H'(aq) + NO: (aq) → NO(g) + 2H:0(g) + Au³ (aq) 3a. If 30 grams of gold react with 3.4 grams of nitrate ion, which reactant is limiting?. 3b. What is the theoretical yield?. 4. Lead (II) nitrate reacts with sodium chloride according to the equation below: Pb(NO.): + NaCl → PbCla + NANO. 4a. If 8.3 grams of lead (II) nitrate react with 5 grams of sodium chloride, which material would be the limiting reactant? 4b. What is the theoretical yield?

Write a balanced equation for the Alka Seltzer reaction where aqueous citric acid, H3C6H5O7, and aqueous sodium bicarbonate, NaHCO3, react and form aqueous sodium citrate, liquid water, and carbon dioxide gas.

Consider the reaction of solid P, and chlorine gas to form gaseous phosphorus trichloride. a) Write the balanced chemical equation for the reaction. b) The balanced chemical equation is P,(s) + 6 CI,(g) → 4 PCI,(g). What is the mass in grams of phosphorus trichloride that can be formed from 222.3 grams of P, based on the balanced chemical equation? c) The balanced chemical equation is P,(s) + 6 CI,(g) → 4 PCI,(g). What is the mass in grams of phosphorus trichloride that can be formed from 304.8 grams of chlorine gas based on the balanced chemical equation? 28 d) Given that 222.3 grams of P, react to make 985.6 g of PCI, and 304.8 g of CI, react to make 393.5 g of PCI, which reactant is limiting? e) The theoretical yield for the reaction is 393.5 g of PCI,. If only 218.7 g of phosphorus trichloride were collected, what is the percent yield of the reaction?

The combustion of gasoline produces carbon dioxide and water. Assume gasoline to be pure octane (C8H18) and calculate how many kilograms of carbon dioxide are added to the atmosphere per 5.4 kgkg of octane burned. (Hint: Begin by writing a balanced equation for the combustion reaction.)

[References] ot A sample of calcium metal with a mass of 2.06 g was reacted with excess oxygen. The following equation represents the reaction that took place: ot 2Ca(s) + O2 (g) → 2CaO(s) The isolated product (CaO) weighed 2.25 g. What was the percentage yield of the reaction? ot ot Percentage yield ot

Consider the general chemical equation 3A+B→2C. Part A. If 1.45 g of A reacts with 1.75 g of B, what is the mass of C? Express your answer with the appropriate units. Part B. If 4.70 g of A reacts to produce 8.95 g of C, what is the mass of B? Express your answer with the appropriate units.