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Stoichiometry

Lead nitrate and sodium iodide reactions

Please answer the following parts of a question. 1. What is precipitated in the reaction of lead nitrate and sodium iodide. 2. Explain the reasoning in three sententces. 3. Write a balanced ionic equation for the reaction of lead nitrate and sodium iodide. 4. How, qualitatively, will the value of the solution in water of t

Determining Density from Volume

I have a 40 lb container that measures 14x20x30 and need to find the density. I also have another 40 lb container that has a volume of 1.9 gal. How do you find the density for both to see which one is lighter?

Properties of solutions - Propylene Glycol

9) Calculate the mass of propylene glycol (C3H8O2) that must be added to 0.340 kg of water to reduce the vapor pressure by 2.88 torr at 40 °C. 10) Calculate the freezing point and boiling point of an antifreeze solution that is 50.0 % by mass of ethylene glycol (C2H6O2) in water. 11) Calculate the freezing point and boili

Electrochemistry

3. Nickel is electrolytically refined at 40°C using an electrolyte containing 50 g/liter of nickel ion. The anodes contain copper impurities (< 2 wt.%) which may go into solution as the nickel anode dissolves. Calculate the concentration of Cu2+ ions in solution that is sufficient to result in the depos

Simple explanation needed

10kg petrol is burned in a car engine. What two main chemicals come from the exhaust and how much of each in kilograms?

For the reaction CL2 + 2KBr yields 2KCL + Br2

For the reaction CL2 + 2KBr yields 2KCL + Br2, how many grams of potassium chloride can be produced from 300 g each of chlorine and potassium bromide? 98.7 g, or 188 g or 111g, or 451g.

Theoretical Yield

150.0 g of AsF3 was combined w/ 180.0g CCl4 to yield AsCl3 & CCl2F2. The theoretical yield CCl2F2 produced in moles should be: 1.705, .7802, 1.274, .5685, 1.170?

Density: Mass and Volume

A sphere made of nickel (d=8.908g/cm^3) has a diameter of 8.20 cm. What mass of nickel was used in making the sphere? (V of sphere = 4/3 pi r^3).

Empirical Formula

How to start from from grams to determine % to then calculate the empirical formula. As and O combine 1.626g sample of a compound has 1.232g of As

Given % yield, calculate grams obtained

Balance the following equation: AsF3 + CCl4 ---> AsCl3 + CCl2F2 the theoretical yield of CCl2F2 = 1.68 moles if the actual yield was 74.3% in the reaction, how many grams of CCl2F2 were obtained

Precipitate from Reactions

Silver nitrate reacts with iron(III)chloride Fe Cl3 to give AgCl and Iron(III)nitrate Fe(NO3)3. A solution with 18 grams of AgNO3 was mixed with a solution. 32.4 grams of FeCl3. How many grams of which reactant remains after reaction?

Calc molecules, given mass

I'm thoroughly confusing myself, I know how to calc a formula mass and to determine from moles how to get the mass. But I'm not making the connection to count #atoms/molecule. ex) What are the number of atoms of C-12 are there in 3.5 gram sample

Moles and Molarity Pproblems

A 12.0% sucrose solution has a density of 1.05g/cm^3. The number that gives the best value for the mass of sugar in 55mL of this solution is? I need step by step answer for this question please. What is the Molarity(m) of a solution that contains 73.5g of 1,4-dichlorobenzene,C6H4Cl2, in 500mL of carbon tetrachloride? (The

Molarity of NaCl solution

How much 0.54M NaCl, "physiologic saline" can be prepared via the dilution of 100mL of 6.0 M NaCl solution?

Chemistry calculations including calculating molecular formulas

What is the molecular formula of a compound that contains 42.87% carbon, 3,598% hydrogen, 25.00% nitrogen and 28.55 oxygen and has a molar mass between 165 and 170? How many grams of lithium contain the same number of atoms as 2.50 Kg of zirconium? If the molar mass of a binary compound has a molar mass between 27 and 28 a

One process for the commercial production of baking soda, sodium hydrogen carbonate, involves the following reaction: aqueous sodium chloride + gaseous ammonia + solid carbon dioxide + liquid water yields aqueous ammonium chloride + solid

1. One process for the commercial production of baking soda, sodium hydrogen carbonate, involves the following reaction: aqueous sodium chloride + gaseous ammonia + solid carbon dioxide + liquid water yields aqueous ammonium chloride + solid sodium hydrogen carbonate. Because they are relatively cheap, sodium chloride and water

A hypothetical compound has a formula of X2YZ3.

A hypothetical compound has a formula of X2YZ3. If the atomic masses of X, Y, and Z are 41.2, 57.7 and 63.9 respectively, calculate the % by mass of the compound. If the molecular formula is actually X6Y3Z9, what is the percentage of each element present?