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Percent Mass and Stoichiometry1) You are the science officer on the Starship Enterprise. The ship is circling a new planet. The away team comes back with some rocks and minerals. Some of the minerals contain iron and you want to determine the amount of iron in the sample.You take 9.000 g of this mineral and treat it with excess bromine (bromine reacts with iron metal to produce iron(III) bromide, which is soluble in water). The solution containing the iron(III) bromide and bromine is then treated with excess silver nitrate. The mass of the silver bromide obtained is found to be 46.34 g. What is the percent of iron in the mineral sample?
2) A common laboratory experiment for introductory chemistry courses involves the analysis of a mixture of BaCl2 and BaCl2.2H2O. You are given a white powder that is a mixture of these compounds and are asked to determine the weight percent of each.You find that 1.392 g of the mixture has a mass of 1.157 g after heating it to drive offall of the water present.(A) What is the weight percent of water in the mixture?(B) What is the weight percent of BaCl2 in the mixture?(C) What is the weight percent of Ba in the mixture?
3) If a bottle of wine is not kept under appropriate conditions, the ethanol (C2 H5 OH) is oxidized to a limited extent (it turns to acetic acid) and the wine becomes very sour and is no longer drinkable. This can be expressed by the following reaction.C2 H5 OH + O2--> C2 H4 O2 (Unbalanced)If the wine contains 15% by mass ethanol (assume the only other ingredient in the wine is water), how many moles of acetic acid are produced i3s9?liter of this wine.The density of the wine is 1.010 g/mL. Assume that all the ethanol is converted to acetic acid. The molar masses of C, H, and O are 12.011, 1.00794, and 15.9994 g/mole,respectively.
Determine At what temperature will Kp 2.00? if it is given that Delta H = +57.2 kJ/mol,Kp = 0.113 at the temperature of 298 Kelvin?
determine the concentration of O3 in air sample (in ppm)If 10,000 Litres of air bubbled through iodide solution and back titrated with 19.4 mL of a 1.2x10-4 M Sodium thiosulfate, also spelled sodium thiosulphate solution to reach equivalence,?
P4(s) + 6F2(g) --> 4PF3(g) How many grams of fluorine are needed to react with 6.20g of phosphorus?
An old synthetic procedure starts by calling for fifteen kilo grams of sulfuric acid. If your largest reaction vessel holds ten litres, can you put the fifteen kilograms of acid into the vessel, or would you require to scale down the reaction reag..
What is the pH of a solution that has a formic acid (HCHO2) concentration of 0.39 and a potassium formate (KCHO2) concentration of 0.12? The Ka for formic acid is 1.7 x 10-4.
Determine how much PV work is done if 80.0 g of C 2 H 4 and 125 grams of hydro chloric acid are permissible to react at atmospheric pressure and the volume change = -63.9 L? express your answer in kilojoules
Given the following reaction: 2 O2 + CH4 CO2 + 2 H2O What mass of CH4 is required to completely react with 100 grams of oxygen.
Chlorine consists of two major isotopes with the following atomic masses: 35Cl (34.9689 amu) and 37Cl (36.9659 amu). The average atomic mass of chlorine is 35.4527 amu.
I need assistance with a project concerning demographic transition, which is little confusing to me. I am really concerned with this class as I have a failing grade
The rate constant for a certain reaction is = 5.70×10-3 s^-1. If the initial reactant concentration was 0.650 M, what will the concentration be after 14.0 minutes.
A rigid container of O2 has a pressure of 388kPa at a temperature of 713K. What is the pressure at 273K.
A gas mixture being used to simulate the atmosphere of another planet consists of 324 mg of methane, 217 mg of argon, and 228 mg of nitrogen.
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