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Stoichiometry

Moles

How many grams are in 1 mole of glucose (C6H12O6) How many individual molecules of sugar are in 1 mole?

Mass to charge ratio

What's the mass to charge ratio? Given: 5.64 x 10(to the)-12 kg/C 1.605 x 10 (to the)-19 C What is the mass of the electron?

Photosynthesis Reaction Questions

1) Photosynthesis is estimated to produce 339.99999 g (dry weight) of plant matter per square meter, 50% of which is carbon. Calculate the total number of grams of carbon "fixed" each year by 1000 square meters. 2) The photosynthetic reaction can be represented as: 6CO2 + 6H2O -> C6H12O6 + 6O2 Of the glucose produced, 40.0%

Volume and final concentration

What would be the steps to solve the following two problems? What volume of 12.0 M HCl is required to make 75.0 mL of 3.50 M HCl? AND What is the final concentration of a solution prepared by diluting 35.0 Ml of 12.0 M HCl to a final volume of 1.20 L?

Concentration of sodium chloeide

What would would the steps to find the concentration of sodium chloride in the final solution if 24.34 mL of 0.113 M BaCl2 completely reacts and the total volume of the reaction is 110.4 mL, give the reaction: BaCl2(aq)+Na2SO4(aq)ds=BaSO4(s)+2NaCl(aq)

Identifying and Classifying Metals

An amateur alchemist claims to have discovered a new metal, which she has named metallium, with the elemental symbol Me. She has carried out an experiment in which a current of 0.500 amps were passed through an aqueous solution of Me(SO4)2 for 45.0 minutes, which deposited 0.682 grams of the metal. Using electrochemistry, show

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

Ionic Equilibria

(See attached file for full problem description) --- 1. When blood is donated, sodium oxalate solution is used to precipitate Ca2+, which triggers clotting. A 104-mL sample of blood contains 9.7à?10-5 Ca2+/mL. A technologist treats the sample w/100.00 mL of .1550 M Na2C2O4. Calculate [Ca2+] after the treatment (Ksp of C

Calculating mass with Q=It

"Calculate the mass of chromium produced in 1.0 hour by the electrolysis of molten CrO3 with an electrical current of 15 A." The answer is 4.85 g, but I'm not entirely sure how to get there. Don't I need the reaction in order to know how many electrons are produced by the electrolysis? I think I first use Q = (I)(t) = (15)

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 deposition of Cu a

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?

Chemical Reaction: Example Problem

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? 98.7g, or 188g or 111g, or 451g.

Grams Unknown, Mols Known

For the reaction 2NA + 2H2O yields 2NAOH + H2, how many grams of sodium hydroxide are produced from 3.0 mol of water? 40. g, 80. g, 120 g, or 240 g.

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 for arsenic oxide

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