2 W S In a combination reaction, 1.53 g of lithium is mixed with 6.86 g of oxygen. (a) Which reactant is present in excess? lithium. O oxygen. (b) How many moles of product are formed? mol (c) After the reaction, how many grams of each reactant and product are present? g Li g 02 g Li₂0 & 9 71 # 3 e d C LA 4 f % 5 t 8.0 6 y h 7 u 8 k O 0

1. Consider this reaction: P4 + 6 Cl2 → 4 PC13 (a) How many moles of PC13 can be made from 16.5 mol P4? (b) How many grams of PC13 can be made from 42.4 g of P4?

ABS plastic is a polymer consisting of three monomer units: acrylonitrile (C₃H₃N), butadiene (C₄H₆), and styrene (C₈H₈). A sample of ABS plastic contains 13.7% N by mass. It took 1.56 g of Br₂ to react completely with a 2.00 g sample of ABS plastic. Bromine reacts 1:1 (by moles) with the butadiene units in the polymer and nothing else, so bromination is a method for determining the quantity of butadiene in the polymer. What is the percent by mass of styrene in the polymer?

In the earth's primitive atmosphere, it is thought that water could have reacted with methane to produce hydrogen gas and carbon monoxide. CH(g) + H;O(g) → CO(g)+ 3H2(g) The particulate representation to the right shows a product mixture for the hydrogen forming reaction above. Which species is the limiting reactant? A. CH,(g) В. Н.О(g) C. Co(g) D. H,(g) E. It is a stoichiometric mixture

ABS plastic is a polymer consisting of three monomer units: acrylonitrile (C₃H₃N), butadiene (C₄H₆), and styrene (C₈H₈). A sample of ABS plastic contains 11.9% N by mass. It took 1.56 g of Br₂ to react completely with a 2.00 g sample of ABS plastic. Bromine reacts 1:1 (by moles) with the butadiene units in the polymer and nothing else, so bromination is a method for determining the quantity of butadiene in the polymer. What is the percent by mass of styrene in the polymer?

Item 19 A piece of aluminum foil 1.18 cm2 and 0.590-mm thick is allowed to react with bromine to form aluminum bromide. Part A How many moles of aluminum were used? (The density of aluminum is 2.699 g/cm³.) Express your answer in moles to three significant figures. ΑΣΦ Ο ? Moles Al = Submit Request Answer ▼Part B Write a balanced chemical equation for this reaction. Express your answer as a chemical equation including phases. ΑΣΦ F 吧? A chemical reaction does not occur for this question. Submit Request Answer mol ▼Part C How many grams of aluminum bromide form, assuming that the aluminum reacts completely? Express your answer in grams to three significant figures. Grams AlBr3 = ΑΣΦ -> ? g

balance the following equation

Morphine (C₁₇H₁₉NO₃) is a painkiller in the opiate family. A sample of morphine was discovered that had been diluted by mixing with table salt (sodium chloride). When 2.00 g of the mixture undergoes combustion, 3.97 g of CO₂ is produced. What is the mass percent of morphine in the mixture?

and chlorine 8) A 25.8 gram sample of aqueous hydrogen chloride decomposed into hydrogen gas of chlorine gas were collected. What is the percent yield of this reaction? 2 HCl(aq) → H,(g) + Cl,(g) Calculate the theoretical yield of chlorine from 25.8 g HCl (grams to grams) gas. 13.6 grams а. E5.0 124 b. Calculate the percent yield. 80.

NaHCO, + H,C,H3O2 NaC, H;O2 + H,0 + CO2 A mixture of acetic acid (vinegar) and sodium bicarbonate (baking soda) is a common home remedy to clean some types of stains. The reaction is shown above. Calculate the moles of CO2 that would result from using 6.4 grams of baking soda.