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Determine the molarity of the solution that is prepared as follows: 73.0 g of magnesium of nitrate is dissolved in enough water to make 550.0mL of solution. molarity
Methane, CH4, burns in oxygen gas to form water and carbon dioxide. What is the correct balanced chemical equation for this reaction
Calculate the composition and quantity of all phases for a 50 wt % Magnesium - Lead alloy at 435 deg Celsius. Sketch the resulting microstructure, assuming the material was equilibrium cooled from t
How many milliliters of an aqueous solution of 0.202 M potassium chloride is needed to obtain 11.4 grams of the salt
You need to make an aqueous solution of 0.191 M zinc sulfate for an experiment in lab, using a 125 mL volumetric flask. How much solid zinc sulfate should you add
In the laboratory you dissolve 15.4 g of zinc acetate in a volumetric flask and add water to a total volume of 500 mL.
The molality of a sodium nitrate solution is 1.44 m. What is the mole fraction of NaNO3? The molar mass of NaNO3 is 85.06 g/mol; the molar mass of H20 is 18.02.
Treat 250.0 g of Ca3(PO4)2 with 150.0 g of H2SO4. How many grams of superphosphate could be formed?
How many grams of K2SO4 are there in 243 grams of an aqueous solution that is 28.7 % by weight K2SO4.
Find the molcular heat capacity in units. Does the law hold up? Can you distinguish a metallic element from a nonmetal this way. Metalloids
Using the oxidation numbers of carbons in malate and oxaloacetate, predict if the conversion of malate to oxaloacetate an oxidation or a reduction. You need to show the calculation of the oxidation
The energy of electron-in-a 1 m box is given as (h^2*n^2)/(8mL^2). find the transition energy form n=3 to n=2. The mass of electron is 9.109e-31 kg and planck constant 6.626e-34 Js
a) write a balanced equation for the reation. b) When 46.0 g of KClO3 is heated, 12.1 g of O2 is formed. How many grams of KCl is also formed? c) What is the percent yield of O2 for the reaction
When 50.0 g of iron(III) oxide reacts with carbon monoxide, 32.8 g of iron is produced. What is the percent yield of the reaction? Fe2O3(s)+3CO(g)-->2Fe(s)+3CO2(g)
How many molecules of NO2 are needed to react with 0.250 mol of H2O? How many grams of HNO3 are produced when 60.0 g of NO2 completly reacts? How many grams of HNO3 can be produced if 225 g of NO2 is
If a mixture of 35.8 g of CH4 and 75.5 g of S reacts, how many grams of H2S are produced? CH4(g)+4S(g)-->CS2(g)+2H2S(g).
a) How many moles of water form when 5.00L of propane gas completely reacts? b) How many grams of CO2 are produced from 18.5 g of oxygen gas and excess propane? c) How many grams of H2O can be produ
a) Write the balance equation for the reaction. b) How many moles of O2 are needed to completly react with 4.0 mol of C2H6O? c) If a car produces 88 g of CO2, how many grams of O2 are used up in the
Which of the following nuclides have magic numbers of both protons and neutrons: (a) helium-4, (b) oxygen-18, (c) calcium-40, (d) zinc-66, (e) lead-208
A particular element M has a heat capacity of 0.36 JgK and it forms an oxide that contains 2.9 grams of M per gram of oxygen What is the molar mass of the metal
Correlate the molar mass, molecular size, and bond polarity of these three gases with the molar volume of a perfect gas. O2, Co2, and H2
what is the value of Kc for the following reaction at equilibrium: N2(g) + 3H2(g)<>2NH3(g) if [NH3]=2.2 M, [N2]=.44 M, and [H2]=.40 M
what is the value of Kc for the following reaction at equilibrium: CO2(g) + H2(g)<>CO(g) + H2O(g) if [CO]=.20 M, [H2O]=.30 M, [CO2]=.30 M, and [H2]=.033M?
find the probability of finding an electron in a 10 nm one dimensional box between 0.1 nm and 0.2 nm.
The Ksp of tin(II) hydroxide, Sn(OH)2, is 5.45 × 10-27. Calculate the solubility of this compound in g/L.