04/16/19

balancing equations

Write and balance the equation for the combination of ammonia gas with solid copper(II) oxide to produce copper metal, nitrogen gas, and liquid water. Include the states of matter.
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04/16/19

Chemisty Question See Description
A solution contains 8.10×10-3 M sodium carbonate and 8.97×10-3 M ammonium fluoride. Solid barium nitrate is added slowly to this mixture. What is the concentration of carbonate ion... more
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04/16/19

For the following chemical reaction, what mass of sodium sulfate (in grams) will be produced from 3.99 mol of sodium hydroxide? 2naoh +h2so4 --> na2so4+2h2o
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04/15/19

Using a chemical equation to find moles

Ammonium phosphate NH43PO4 is an important ingredient in many solid fertilizers. It can be made by reacting aqueous phosphoric acid H3PO4 with liquid ammonia. Calculate the moles of ammonium... more
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04/15/19

Using a chemical equation to find moles of product

Ammonium perchlorate NH4ClO4 is a powerful solid rocket fuel, used in the Space Shuttle boosters. It decomposes into nitrogen N2 gas, chlorine Cl2 gas, oxygen O2 gas and water vapor, releasing a... more
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04/15/19

Chemistry using chemical equation to find moles

Green plants use light from the Sun to drive photosynthesis, a chemical reaction in which liquid water and carbon dioxide gas form aqueous glucose C6H12O6and oxygen O2 gas. Calculate the moles of... more
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04/15/19

You begin with 1.5000 g of salicylic acid and prepare aspirin according to the outlined procedure in your lab manual. What is your theoretical yield of aspirin?
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04/15/19

The radioactive element carbon-14 has a half life of 5750 years. A scientist determined that the bones from a mastodon had lost 61.9% of their carbon 14 how old were the bones at the time they were

The radioactive element carbon-14 has a half life of 5750 years. A scientist determined that the bones from a mastodon had lost 61.9% of their carbon 14 how old were the bones at the time they were... more
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04/15/19

Gas Stoichiometry
A 0.650 g sample of SrCO3 reacts with HCl as described above, using the same apparatus we used in our experiment, at a temperature of 29 oC and an atmospheric pressure of 750 mm Hg. What is the... more
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04/14/19

unlike organosodium and organopotassium compounds,organolithium compounds are soluble in hydrocarbon and other non polar solvent
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04/14/19

Back-titration - Milk of Magnesia
For one trial of a back titration of a 2g sample of mg(OH)2, 60mL of 0.1N HCl is used to dissolve the Mg(OH)2 sample and the pH is tested to be around pH 4, then the excess HCl is back-titrated... more
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04/14/19

NEED HELP CREATING BUFFER OF HClO & NAClO ... PLEASE!!!
You are tasked with preparing a buffer of hypochlorous acid (HClO) and sodium hypochlorite (NaClO). To do so, you add 50 mL of 5.7 M hypochlorous acid and 25.7 g of sodium hypochlorite to 1.5 L of... more
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04/14/19

All chemical reactions that occur spontaneously
A. are endothermicB. Produce products that are more disordered than the reactantsC. Do not proceed more rapidly with provided heatD. Have a negative Delta G
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04/14/19

what is the density of atmosphere assuming that O2 : 21% and N2 : 79%
I just can't seem to work this out, and I was thinking whether I use the ideal gas law, and find the empirical formula, but again, I have no idea.
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04/14/19

If a solution is formed with equimolar amounts of [Cd(CN)4]2− (Kf=1.3×107) and [Ag(NH3)2]+ (Kf=1.7×107), what will be true about the system?
If a solution is formed with equimolar amounts of [Cd(CN)4]2− (Kf=1.3×107) and [Ag(NH3)2]+ (Kf=1.7×107), what will be true about the system?Select the correct answer... more
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04/14/19

Extend Undertstanding

A metal carbonate containing an unknown +2 metal ("MCO3") reacts with excess acid resulting in the loss of CO2. Analysis of the experimental data indicates that the mass % CO2 in the unknown metal... more
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04/14/19

Review and Extend Stoichiometry

What minimum mass of cobalt (II) nitrate (MM of Co(NO3)2 = 182.94 g/mol) must be added to 60.0 mL of a 0.0890 M sodium phosphate solution in order to completely precipitate all of the phosphate as... more
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04/13/19

Find the mass of Sn(s)?

In a similar experiment, a sample of tin metal was dissolved in nitric acid to produce 15.00 mL of solution containing Sn2+. Titration analysis resulted in the calculation that the concentration of... more
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04/13/19

finding Concentration of Cr2O72-(aq) ?
ProblemWhat is the concentration of a tin(ll) chloride solution prepared from a sample of tin ore?Experimental DesignThe potassium dichromate solution is first standardized by titration with 15.00... more
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04/13/19

What is oxidation state of I in H^4IO^-6?How?
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04/13/19

Q Which is a tertiary alcohol?
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04/13/19

Q Calculate the pH of a 0.05M (assuming complete ionization)?
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04/12/19

What is the mass of the isotope 79 Br?
I need to know this for something happening in Louisiana called you be the chemist.
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04/12/19

what are the four strong weak acid base combinations of the titration process? For each combination, determine the expected pH at the equivalence point and determine the appropriate pH indicator
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04/12/19

oxalate analysis (synthesis)
A 1.20 g sample of a compound congtaining oxalate was titrated with 27.40 ml of a 0.0450 M solution of KMnO4. a.)How many moles of KMnO4 were used in the titration?b.)How many moles of oxalate were... more
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