Chemistry, 14.04.2020 23:23 TeenageKicks9800
Portable hot packs are available for skiers and other people engaged in other outdoor activities in a cold climate. The air-permeable paper packet contains a mixture of powdered iron, sodium chloride, and other components, all moistened by a little water. The exothermic reaction that produces the heat is a very common one, the rusting of iron: 4Fe(s) + 3O2(g) → 2Fe2O3(s) When the outside plastic envelope is removed, O2 molecules penetrate the paper, causing the reaction to begin. A typical packet contains 250. g of iron to warm your hands or feet for up to 4 hours. Calculate the amount of heat (in kJ) associated with this reaction.
Answers: 3
Chemistry, 22.06.2019 03:30
Select the correct answer. when carbon dioxide dissolves in water, it sometimes reacts with water to form carbonic acid as in this balanced equation: co2 + h2o → h2co3. if 495 milliliters of carbon dioxide at 25°c and 101.3 kilopascals reacts with excess water, what is the theoretical yield of carbonic acid? use the periodic table and the ideal gas resource a. 0.889 g b. 1.10g c. 1.27g d. 2.02g what's the answer! quick!
Answers: 1
Chemistry, 22.06.2019 11:00
Iron (3) oxide will decompose in the presence of hydrogen gas and heater to produced iron and digydrogen monoxide white a balanced chemical equation
Answers: 1
Chemistry, 22.06.2019 12:50
What is the chemical name of the compound na2co3? use the list of polyatomic ions and the periodic table to you answer. a. sodium carbon oxide b. sodium carbonate c. sodium(ll) carbonate d. sodium oxalate
Answers: 1
Portable hot packs are available for skiers and other people engaged in other outdoor activities in...
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