05/20/22

How many grams of Ag2CO3 will precipitate when excess (NH4)2CO3 solution is added to 54.0 mL of 0.667 M AgNO3 solution? g
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05/20/22

Mass given % Yield
I am completely lost on this hw so any help would be greatly appreciated. Please and thank you!What mass of aspirin(C9H8O4) is produced from 86.4g of C7H6O3 assuming 95.0% yield from the reaction... more
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05/18/22

Somebody please answer this question for me

 Antacid tablets are used to neutralize stomach acid and relieve indigestion or acid reflux. Many commercial antacids contain magnesium hydroxide, Mg(OH)2, as the active ingredient. If one tablet... more
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05/18/22

Please somebody answer this question for me

A 5.0 mL sample of a stock solution of concentrated HNO3, a strong acid, is diluted with distilled water to prepare 100.0 mL of its dilute solution. A 10.0 mL sample of this dilute solution is then... more
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05/18/22

Can someone please answer this question

How many milliliters (mL) of 0.10 M NaH solution are required to completely neutralize 20.0 ml of a 0.175 M solution of HyPO, to the phenolphthalein end point? Na0H (aq) H,PO, (ag) Na,PO, (aq) +... more
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05/18/22

Chem help please
If a system has 5.00×102 kcal of work done to it, and releases 5.00×102 kJ of heat into its surroundings, what is the change in internal energy (Δ𝐸 or Δ𝑈) of the system?
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05/18/22

please help chem question
Assuming 100% dissociation, calculate the freezing point ( 𝑇f ) and boiling point ( 𝑇b ) of 1.75 𝑚 AgNO3(aq) .
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05/17/22

The molar mass of Fe2O3 is 159.69 g/mol. A student measured the mass of a piece of Fe2O3 and found it to be 18.54 grams. This is ___ moles of Fe2O3
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05/17/22

Can somebody please answer this
A 12.5 mL sample of 0.25 M H2SO4 solution is completely neutralize by 0.150 M KOH solution. Calculate the volume of KOH solution used in this neutralization reactionH2SO4 (aq) + KOH → K2SO4 (aq)... more
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05/17/22

Theoretical Chem
1H2  + 1Cl2     2HClWhat volume of hydrochloric acid (HCl) could theoretically be produced when 6 Liters of H2 reacts with 4 Liters of Cl2? 
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05/17/22

Volume stored at STP
2Na  + 2H2O     2NaOH   + 1H2What volume in Liters of Hydrogen gas (H2) would be produced in the following reaction if 46 grams of Sodium (Na) were completely reacted and the hydrogen gas was... more
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05/17/22

How to get analytical wavelength with absorbance
Help with calculating the Analytical Wavelength, nm, of ff. Please show solution. Thank you!I. Analytical Wavelength DeterminationWavelength (nm)---- Absorbance400... more
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05/16/22

"mass" of burning steel wool drops then rises. Burning oil or rising hot air?
In a demonstration, a small wad of extra-fine steel wool is placed on a digital scale and set alight. Why does the measured mass drop initially?Do you think the low pressure applied to the entirety... more
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05/16/22

calculate the [H+] and [OH-] of a 3.66 x10^-7 M C2H3O2 solution
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05/16/22

How to find out which is acid, and which is base in an equation like this- (H2PO4)- + HF ---->

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05/16/22

What is percent composition by mass of sodium chloride and potassium chloride in the mixture?
A 0.722 g mixture containing only sodium chloride and potassium chloride was dissolved in water. It required 82.1 mL of 0.141 M AgNO3 to completely precipitate all of the chloride present. What is... more
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05/16/22

empirical formula:
Complete combustion of 3.60 g of a hydrocarbon produced 11.0 g of CO2 and 5.27 g of H2O. What is the empirical formula for the hydrocarbon? Insert subscripts as necessary.empirical formula:
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05/16/22

Calculate the theoretical yield of iron(III) oxide ( Fe2O3 ) And The reaction produces 8.36 g of Fe2O3. What is the percent yield of the reaction?
Iron reacts with oxygen at high temperatures to form iron(III) oxide.4Fe(s)+3O2(g)⟶2Fe2O3(s)Suppose 18.0 g of iron (Fe) is reacted with 20.7 g of oxygen 
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05/16/22

Calculate the theoretical yield of aspirin ( C9H8O4).

Aspirin can be synthesized in the lab by combining salicylic acid (C7H6O3) and acetic anhydride (C4H6O3) to form aspirin (C9H8O4) and acetic acid (C2H4O2). The balanced equation for this... more
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05/15/22

In elctrochemistry labs why should we measure a standard cell potential (Ecell) even if the metal ion concentrations are 0.1M not 1M?
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05/14/22

Prepare 100. ml of 0.1 N H2S04 by diluting from original H2S04.
Prepare 100. ml of 0.1 N H2S04 by dilutingfrom original H2S04.Eq. wt. of H,S04 = 98/2=49 .dH2S04= 1.08Purity =98%I need the solution
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05/14/22

100ml of 0.1 N H2SO4 by diluting from original H2SO4.
how to solve this? 100ml of 0.1 N H2SO4 by diluting from original H2SO4.Atomic mass of: O=16 , H=1 S=32d H2SO4=1.08 purity%=98%i need the solution.
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05/14/22

What is the concentration of OH- and Ca ions and the Ksp?
In the lab, you'll be titrating a saturated solution of Ca(OH)2 using 0.05 M HCl to determine the Ksp for Ca(OH)2 in water. This is possible since when you titrate to the equivalence point, the... more
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05/13/22

Acidic solution of permanganate oxidizing nitrous acid to nitrate ions. Oxidation rxn, reduction rxn, and net ionic rxn with states of matter.
An acidic solution of permanganate (MnO4–) ions can oxidize nitrous acid to nitrate ions. The products include dissolved Mn2+ ions. Write the chemical equations describing the oxidation of nitrous... more
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05/13/22

what is the oxidation number of arsenic in chromium(III) arsenate?
Pressure treated lumber contains a compound with the molecular formula CrAsO₄. Given that this compound contains a Cr(III) cation, what is the oxidation number of arsenic in chromium(III)... more
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