02/26/20

3.90 L of a 4.50 M NaOH solution
Calculate the grams of solute needed to prepare
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02/25/20

A sample of 9.60 g of solid calcium hydroxide is added to 34.5 mL of 0.320 M aqueous hydrochloric acid. Write the balanced chemical equation for the reaction. .
How many grams of salt are formed after the reaction is complete? How many grams of the excess reactant remain after the reaction is complete?
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02/24/20

How many grams of NaCl are required to make 500.0 mL of a 0.25 M NaCl standard solution?

A. 7,250 g NaClB. 2.2 g NaCl C. 7.3 g NaCl D. 0.0021
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02/24/20

4HCl(aq)+MnO2(s) ⟶ MnCl2(aq)+2H2O(l)+Cl2(g) A sample of 41.9g MnO2 is added to a solution containing 44.3 g HCl .
What is the limiting reactant?HClorMnO2What is the theoretical yield of Cl2?If the yield of the reaction is 83.3%, what is the actual yield of chlorine?
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02/24/20

How many grams?
2 Al + 3 CuCl2.H2O → 3 Cu + 2 AlCl3 + 6 H2OAssuming 32.49 grams of Al are consumed in the presence of excess copper II chloride dihydrate, how many grams of AlCl3 can be produced if the reaction... more
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02/24/20

Complete combustion of 2.60 g of a hydrocarbon produced 8.36 g of CO2 and 2.85 g of H2O. What is the empirical formula for the hydrocarbon? Insert subscripts as necessary.
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02/24/20

What is the number of formula units in a 6.34 mol sample of FeCl 3

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02/23/20

A mixture of 156.3 g of P and 161.5 g of O2 reacts completely to form P4O6 and P4O10 . Find the masses of P4O6 and P4O10 that are formed by the reaction.
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02/23/20

A sample of 6.71g of solid calcium hydroxide is added to 30.5 mL of 0.430M aqueous hydrochloric acid. Write the balanced chemical equation for the reaction. Physical states are optional.
What is the limiting reactant?calcium hydroxideorhydrochloric acidHow many grams of salt are formed after the reaction is complete?How many grams of the excess reactant remain after the reaction... more
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02/22/20

I don't understand this chem homework
If the vapor pressure of water at 2.8 degrees C is 11.574 mm of Hg, and the pressure of a gas collected over water is 781.2 torr, what is the pressure of the gas only (dry)?
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02/22/20

Chemistry homework
The atmospheric pressure recorded was 29.08 in Hg. What is this pressure in torr?
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02/22/20

Need Chem help!!
If the volume of an ideal gas occupies 490.3mL at 18.94 degrees C, what volume will it occupy at 98.36 degrees C?
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02/22/20

The first step of the Ostwald process, ammonia is reacted with oxygen gas to produce nitric oxide and water.
What is the maximum mass of H2O that can be produced by combining 61.7 g of each reactant?4NH3(g)+5O2(g)⟶4NO(g)+6H2O(g)
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02/22/20

Small quantities of oxygen can be prepared in the laboratory by heating potassium chlorate, KClO3(s).
The equation for the reaction is2KClO3⟶2KCl+3O2Calculate how many grams of O2(g) can be produced from heating 19.1 g KClO3(s).
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02/22/20

Consider the combustion reaction for octane (C8H18) , which is a primary component of gasoline.
2C8H18+25O2⟶16CO2+18H2OHow many moles of CO2 are emitted into the atmosphere when 19.6 g C8H18 is burned?
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02/21/20

Finding Work and Value of ΔE?
Calculate the work (w) and ΔEo, in kJ, at 298 K and 1 atm pressure, for the combustion of one mole of C3H8 (g). First write and balance the equation. The products will be CO2 (g) and H2O (g).The... more
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02/20/20

If 15.00g of Magnesium metal reacts with a solution containing AgNO3 to produce silver metal, how much silver is produced in moles? Show work please. :)
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02/20/20

The atomic mass of Iodine (I) is less than the atomic mass of Tellurium (Te). But an Iodine atom has one more proton than a Tellurium atom.How is this situation possible??
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02/20/20

Chemistry question
How many g of Al(NO3)3 do we get after the reaction of 10,2 g Al2O3 with 200 ml HNO3 solution (3 mol/l)?
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02/19/20

Chemical solubility
How does a solute (dextrose) negatively impact the solubility of another solute (plant peptone) in water; thereby causing the peptone (which is close to its solubility limit) to precipitate.
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02/19/20

What fraction of a reactant has been consumed after 4 half-lives in a first-order reaction?
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02/19/20

Solve for ΔG (in kJ)

Consider the chemical reaction and thermochemical information and initial partial pressures of the reaction components given below:CO(g) + H2O(g) ⇌ CO2(g) + H2(g)    ΔHf° (kJ/mol) S° (J... more
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02/19/20

Na2S2O3 + 2HCl → S + SO2 + 2NaCl + H2O
I would really appreciate an detailed explanation of how the thiosulfate in the reaction can act as both a reductant and an oxidiser. Thank you!
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02/18/20

Dimensional Analysis Problem Help
To treat a bacterial infection, a doctor orders 4 tablets of amoxicillin per day for 10 days. If each tablet contains 250 mg of amoxicillin, how many ounces of the medication are given in 10 days?... more
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02/18/20

Write the balanced net ionic equation for the reaction of aqueous sodium carbonate with aqueous lead(II) nitrate. Include phases
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