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How many milliliters of water vapor, measured at 318 degrees C and 735 torr, are formed when 33.6 mL of NH3 at 825 torr and 127 degrees C react with oxygen according to the following equation? 4 NH3 + 2 O2 ---> 2 N2 + 6 H2O
A graduated cylinder contains 148 of water. A 17.0 piece of iron (density = 7.86 ) and a 19.0 piece of lead are added. What is the new water level in the cylinder?
Determine the concentration of CO32- ions in a 0.18 M H2CO3 solution. Carbonic acid is a diprotic acid whose Ka1 = 4.3 x 10-7 and Ka2 = 5.6 x 10-11."
H2(g) + I2(g) = 2HI(g) Write a general equation that expresses the rate of this reaction in terms of the product.
If an unknown is water soluble, why is it unnecessary and potentially misleading to perform (and interpret) the result of the solubility of this unknown in 5% HCl.
Explain why each of other solvents is less desirable than the solvent you have chosen. Acetonitrile, dimethylformamide, hexane, methylene chloride are our solvent choices.
When a solution of copper(II) nitrate is mixed with a solution of sodium hydroxide, a blue precipitate forms. Enter the balanced equation for the reaction, including the states of all the substances.
What is the pH of a 0.0278 M solution of CaO? HINT: CaO is ionic and dissociates into ions. What is the oxygen ion that results? What kind of an acid or base is it? You need to write out the acid/base reaction to get the stoichiometry right.
A 48.1 mL sample of gas in a cylinder equipped with a piston is warmed from 22 degrees C to 90 degrees C. what is the volume at final temperature?
The waste water sample needs 28.51 mL of titrant, while the blank sample needs 44.37 mL to reach a 1, 10 phenanthroline endpoint. Explain what the COD of the waste water sample is
This was a question on my Mastering Chemistry homework. It's from Tro's Cha: Determine the pH of the following two-component solution: 0.260 M NH4NO3 and 0.102 M HCN
An aerosol spray can of deodorant with a volume of 350 mL contains 3.0 g of propane gas C3H8 as propellant.
Rubidium has two naturally occurring isotopes, rubidium -85 ( atomic mass = 84.9118 amu; abundance = 72.15%) and rubidium -87 (atomic mass = 86.9092; abundance = 27.85%). Calculate the atomic weight of rubidium.
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