How many moles of water can be produced
2C4H10 + 13O2 → 8CO2 + 10H2O
The equation shows the combustion of butane (C4H10). How many moles of water can be produced by 12.5 moles of C4H10 with excess oxygen?
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What is the freezing-point depression of the solvent if the freezing point constant is -1.86 °C/m? Show all of the work needed to solve this problem.
1.45 g sample of an iron ore is dissolved in acid and the iron obtained is fe2+ (aq). To titrate the solution, 21.6 mL of 0.102 M KMnO4(aq) is required. What is the percent of iron in the ore?
Fe203 is converted into metallic Fe plus H2O(g). If the residue weighs 1.774 g, what is the weight percent of Fe2O3 in the original mixture?
Vehicles arrive at a tollbooth according to the function λ(t) = 5.2 - 0.20t, where λ(t) is in vehicles per minute and t is in minutes. The toll booth operator processes one vehicle every 20 seconds.
Hydrogen sulfide ion, HS-, is a weaker base than ammonia, NH3. When ammonia reacts with hydrosulfuric acid, H2S, what species are present in the solution in the largest amount?
25.0 mL of ethanol (density = 0.789 g/mL) initially at 5.4°C is mixed with 34.6 mL of water (density = 1.0 g/mL) initially at 25.3°C in an insulated beaker. Assuming that no heat is lost, what is the final temperature of the mixture?
In certain cases calcium hydroxide and sulfuric acid react to produce calcium bisulfate and water. When 0.0720 mol H2SO4 are reacted with 0.0240 mol Ca(OH)2, how much calcium bisulfate is produced?
Suppose that 0.92 of water condenses on a 85.0 block of iron that is initially at 22. If the heat released during condensation goes only to warming the iron block, what is the final temperature (in ) of the iron block? (Assume a constant enthalpy
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