There are two steps in the usual industrial preparation of acrylic acid, the immediate precursor of several useful plastics. In the first step, calcium carbide and water react to form acetylene and calcium hydroxide: CaC,(s)+2 H,O(g)→C,H,(9)+Ca(OH),(s) In the second step, acetylene, carbon dioxide and water react to form acrylic acid: 6C,H,(9)+3 CO,(9)+4 H,O(g)→5CH,CHCO,H(9) dlo Write the net chemical equation for the production of acrylic acid from calcium carbide, water and carbon dioxide. Be sure your equation is balanced.

Your lab partner accidentally mixed some sodium chloride with your sample of Epsom salts (MgSO₄･7H₂O). You want to make a standard solution of magnesium ion, and this is the only sample of a magnesium salt you have. To determine the amount of magnesium salt in the mixture, you heat 100.00 g to drive off the water of hydration and find that the anhydrous mixture has a mass of 55.25 g. What is the mass in grams of the original salt mixture that you must add to 1.000 L of water to make a 0.1000 M solution of Mg²⁺ ion?

8.) Incomplete combustion of hydrocarbons leads to the generation of carbon monoxide rather than carbon dioxide. As a result, improperly vented furnaces can poison people who live in an affected building because of the toxicity of CO. Calculate the heat of reaction for the incomplete combustion of methane, CH4(g), to yield liquid water and CO(g).

Consider the reaction for the production of NO₂ from NO: 2 NO(g) + O₂ (g) → 2 NO₂ (g)

Heptacarbon octahydride is an effective gasoline additive. In the presence of oxygen gas (and a spark), it undergoes complete combustion. (c) Calculate the mass of oxygen gas necessary to produce a theoretical yield of 1.00 lb of carbon dioxide.

Consider the reaction below for the combustion of methane (CH4, which is the principal component of natural gas).  When natural gas is combusted, heat is given off that can be used to provide warmth in homes as well as to heat water, and it is increasingly used as an alternative to coal for the production of electricity. CH4(g)  +  2O2(g)  →  CO2(g)  +  2H2O(g)  +  q   Which of the following statements are correct? The combustion of methane is endothermic, and the sign of ∆Hrxn is negative. The combustion of methane is endothermic, and the sign of ∆Hrxn is positive. The combustion of methane is exothermic, and the sign of ∆Hrxn is positive. The combustion of methane is exothermic, and the sign of ∆Hrxn is negative.

Balance the following chemical equation (if necessary):

Which of the following is the formation reaction for Na2CO3 (s)?   A. 2 Na(s) + C(s, graphite) + 3 O(g)  → Na2CO3(s)   B. 4 Na(s) + 2 C(s, graphite) + 3 O2(g)  → 2 Na2CO3(s)   C. 2 Na(s) + C(s, graphite) + 1.5 O2(g)  → Na2CO3(s)   D. Na2(s) + C(s, graphite) + 1.5 O2(g)  → Na2CO3(s)   E. 2 Na(g) + C(g) + 1.5 O2(g)  → Na2CO3(s)

There are two steps in the extraction of copper metal from chalcocite, a copper ore. In the first step, copper(I) sulfide and oxygen react to form copper(I) oxide and sulfur dioxide: 2Cu,S(s) + 30,(g) - 2Cu,O(s) + 2SO, (g) In the second step, copper(I) oxide and carbon react to form copper and carbon monoxide: Cu,O(s) + C(s) → 2Cu(s) + CO (g) ol Suppose the yield of the first step is 82.% and the yield of the second step is 83.%. Calculate the mass of oxygen required to make 1.0 kg of copper. Be sure your answer has a unit symbol, if needed, and is rounded to 2 significant digits. x10

8. A 1.107-g sample of benzoic acid (HC;H;O2) is burned in an excess of O:(g) in a bomb calorimeter, which is immersed in water. The reaction produces heat that causes the temperature of the water and bomb to increase from 24.96 to 29.20°C. (a) If the heat capacity of the calorimeter is 6.90 kJ/ºC, how many kilojoules of heat are produced by the combustion of 1.107 g of benzoic acid? (b) Calculate the heat of combustion per gram of benzoic acid and the molar enthalpy of combustion of benzoic acid.