10/14/19

Write and balance the equation for the complete combustion of the hydrocarbon C
C8H14.Balanced equation:________Show all work Use R and P method table
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10/14/19

Write and balance the chemical equation for the reaction between aqueous potassium bromide and aqueous lead (II) nitrate.

Write states for all compounds. Write the total ionic equation, net ionic equation, and determine the spectator ions. Balanced chemical equation:____________Total ionic equation:___________Net... more
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10/14/19

When heated, iron and sulfur combine to form a new compound, iron (III) sulfide. Write and balance the chemical equation. Determine what is oxidized and what is reduced (include charges).
Balanced chemical equation:_____________________ is oxidized to _________ is reduced to _____ Show all work
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10/14/19

When the following equation is balanced the coefficient of oxygen is _______.
____C3H4+_____O2———>____CO2+____H2O-Show all work-Show with R and P method
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10/14/19

I need help finding the unknown metal.
Suppose you react 0.06916g of an unknown that forms one mole of hydrogen gas for each mole of metal. If you collect 38.98 mL of dry hydrogen at 298 K and Patm = 689 torr, calculate the molar mass... more
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10/14/19

Determine the volume in mL of 0.22 M NaOH(aq) needed to reach the equivalence (stoichiometric) point in the titration of 38 mL of 0.24 M propanoic acid(aq).

Determine the volume in mL of 0.22 M NaOH(aq) needed to reach the equivalence (stoichiometric) point in the titration of 38 mL of 0.24 M propanoic acid(aq). The Ka of propanoic acid is 1.3 x... more
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10/14/19

alculate the pH during the titration of 20.00 mL of 0.1000 M ethylamine, C2H5NH2(aq), with 0.1000 M HCl(aq) after 11 mL of the acid have been added.
alculate the pH during the titration of 20.00 mL of 0.1000 M ethylamine, C2H5NH2(aq), with 0.1000 M HCl(aq) after 11 mL of the acid have been added. Kb of ethylamine = 6.5 x 10-4.The answer is... more
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10/14/19

Calculate the pH during the titration of 20.00 mL of 0.1000 M HCOOH(aq) with 0.2000 M NaOH(aq) after 5.5 mL of the base have been added.
Calculate the pH during the titration of 20.00 mL of 0.1000 M HCOOH(aq) with 0.2000 M NaOH(aq) after 5.5 mL of the base have been added.Ka of formic acid = 1.8 x 10-4.the answer is 3.83please show... more
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10/14/19

Calculate the pH during the titration of 30.00 mL of 0.1000 M NaOH(aq) with 0.1000 M HCl(aq) after 29.3 mL of the acid have been added.
Calculate the pH during the titration of 30.00 mL of 0.1000 M NaOH(aq) with 0.1000 M HCl(aq) after 29.3 mL of the acid have been added.the answer is 11.07please explain your steps, thank you :)
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10/14/19

A buffer that contains 0.3 M of acid, HY and 0.32 M of its conjugate base Y-, has a pH of 3.06. What is the pH after 0.02 mol of Ba(OH)2 are added to 0.68 L of the solution?
A buffer that contains 0.3 M of acid, HY and 0.32 M of its conjugate base Y-, has a pH of 3.06. What is the pH after 0.02 mol of Ba(OH)2 are added to 0.68 L of the solution?the answer is 3.2please... more
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10/14/19

What is the buffer component ratio, (BrO-)/(HBrO) of a bromate buffer that has a pH of 9. Ka of HBrO is 2.3 x 10-9.
What is the buffer component ratio, (BrO-)/(HBrO) of a bromate buffer that has a pH of 9. Ka of HBrO is 2.3 x 10-9.the answer is 2.29
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10/14/19

Calculate the pH of a solution that results from mixing 12 mL of 0.11 M HClO(aq) with 26 mL of 0.1 M NaClO(aq). The Ka value for HClO is 3 x 10-8.
Calculate the pH of a solution that results from mixing 12 mL of 0.11 M HClO(aq) with 26 mL of 0.1 M NaClO(aq). The Ka value for HClO is 3 x 10-8.I used the same method I used for a similar... more
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10/14/19

Calculate the pH when 1.61 g of CH3COONa (FW = 82.03 g/mol) is added to 34 mL of 0.500 M acetic acid, CH3COOH. Ignore any changes in volume. The Ka value for CH3COOH is 1.8 x 10-5.
Calculate the pH when 1.61 g of CH3COONa (FW = 82.03 g/mol) is added to 34 mL of 0.500 M acetic acid, CH3COOH. Ignore any changes in volume. The Ka value for CH3COOH is 1.8 x 10-5.The answer is... more
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10/14/19

Calculate the pH of a solution that is 0.181 M NH3 and 0.24 M NH4Cl.
Calculate the pH of a solution that is 0.181 M NH3 and 0.24 M NH4Cl.Kb of NH3 is 1.8 x 10-5.The answer is 9.13please explain the steps, thank you :)
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10/12/19

If a student uses 3.869 g of salicylic acid in the lab and produces 2.173 grams of aspirin. What is his percent yield?

If a student uses 3.869 g of salicylic acid in the lab and produces 2.173 grams of aspirin. What is his percent yield? 
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10/12/19

If a student uses 2.617 g of salicylic acid, how many grams of aspirin should she be able to produce
If a student uses 2.617 g of salicylic acid, how many grams of aspirin should she be able to produce
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10/12/19

Write the balanced molecular and net ionic equations for the reaction between aluminum metal and silver nitrate. Identify the oxidation and reduction half-reactions.
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10/12/19

How many grams of NH3 can be produced from 4.77 mol of N2 and excess H2. Express your answer numerically in grams.
To understand how to use stoichiometry to convert between quantities of reactants and products in chemical equations.
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10/11/19

Determine the energy of 2.00 mol of photons for each kind of light.
Determine the energy of 2.00 mol of photons for each kind of light.Part A infrared radiation  1540 (nm)Part B visible light 520 (nm)Part C ultraviolet radiation  140 (nm)
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10/11/19

A jet airplane reaches 804./kmh on a certain flight. What distance does it cover in 13.0min?
Set the math up. But don't do any of it. Just leave your answer as a math expression.Also, be sure your answer includes all the correct unit symbols. 
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10/10/19

specific heat problems
A student drinks a 16 oz bottle of Diet Cola. The student's stomach warms the soft drink from 2 °C to 37 °C, how many kcals were required. (16 fluid oz = 472 mL, assume the density of Diet Cola is... more
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10/10/19

SOLUBILITY OF SOLUTION
The Ksp of Mg(OH)2 is 6 x 10^-12. How much 2x10^-4 M HCL (in mL) is needed to neutralize a 100 mL saturated solution of Mg(OH)2?
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10/10/19

Express your answer numerically in kilojoules.
Duncan knows that it takes 36400 cal of energy to heat a pint of water from room temperature to boiling. However, Duncan has prepared ramen noodles so many times he does not need to measure the... more
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10/09/19

What is the concentration (in M) of NaCl in a solution if titration of 15.00 mL of the solution with 0.2255 M AgNO3 requires 19.30 mL of the AgNO3 solution to reach the end point?

AgNO3(aq) + NaCl(aq) → AgCl(s) + NaNO3(aq)
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10/09/19

How do you calculate the mass of KIO3 and the volume of 0.100 M H2SO4 needed to prepare 50.0 mL of a .2 M potassium iodate and .08 M sulfuric acid solution?
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