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Pb+NO3+Na2SO4-->?
2 answers
asked by
KELLY
501 views
How many milliliters of a 0.200M AgNO3 solution are required to preccipitate most of the Cl^- ions from a solution containing
1 answer
asked by
KELLY
420 views
Sodium hydroxide is used extensively in acid-base titrations because it is a strong inexpensive base. A sodium hydroxide
3 answers
asked by
KELLY
1,044 views
I balanced the equation:
HBr(aq) +NH3(aq)->NH4Br I need to find the ionic equation and the net ionic equation
5 answers
asked by
KELLY
15,314 views
What is the oxidation number of Cr2(SO4)3
2 answers
asked by
KELLY
521 views
What is the oxidation number of (NH4)2SO4
3 answers
asked by
KELLY
1,067 views
The Cu2+ ions in this experiment are produced by the reaction of 1.0 g copper turnings with excess nitric acid. How many moles
4 answers
asked by
Maggie
2,694 views
how many grams of metallic copper are required to react with the number of moles of Cu2+ , 0.16mol, to form CuCl overall
2 answers
asked by
Maggie
1,264 views
what is the maximum weight of CuCl that can be prepared from the reaction sequence using 1.0g of Cu turnings to prepare the Cu2+
4 answers
asked by
Maggie
477 views
A Cylinder is filled with 1.20 mol of He(g) at 25 C under ambient pressure of 0.966 atm. The gas in the cylinder is then heated
2 answers
asked by
J Velji
526 views
if 5.25g of ice AT 0 c IS PLACED IN 25.63 G OF LIQUID WATER AT 28c, WHAT WILL BE THE FINAL TEMPERATURE OF THIS MIXTURE?
5 answers
asked by
J Velji
391 views
if 5.25g of ice AT 0 c IS PLACED IN 25.63 G OF LIQUID WATER AT 28c, WHAT WILL BE THE FINAL TEMPERATURE OF THIS MIXTURE?
1 answer
asked by
J Velji
452 views
an iron ore sample was dissolved in Hydrochloric acid the iron was obtained as Fe2+. The solution was titrated with 41.08 mL of
2 answers
asked by
Laura
716 views
Write the electron configuration for Se using the noble gas core format.
3 answers
asked by
KELLY
452 views
Draw an orbital diagram showing valence electrons and write the condensed ground-state electron configuration for Se3+
2 answers
asked by
KELLY
562 views
Write the condensed ground-stste electron configuration of the transition metal ion Mo3+
2 answers
asked by
KELLY
1,200 views
What is the wavelength(in meters) of a proton(mass=1.673x10^-24g) that has been accelera ted to 25% of the speed of light?
4 answers
asked by
Whitney
1,127 views
"What is the pH of a solution that is 0.50 M in sodium acetate and 0.75 M in acetic acid? (Ka for acetic acid is 1.85 x 10-5)."
W
3 answers
asked by
James
642 views
The Question Is:
"A student weighs 0.347 g of KHP on a laboratory balance. The KHP was titrated with NaOH and the concentration
4 answers
asked by
James
2,159 views
"A student weighs 0.347 g of KHP on a laboratory balance. The KHP was titrated with NaOH and the concentration of the NaOH
2 answers
asked by
James
1,189 views
1. What is the change in internal energy (in J) of a system that absorbs 0.677 kJ of heat from its surroundings and has 0.438
1 answer
asked by
Nevaeh
1,253 views
Which is the correct form of equilibrium expression of the following reaction.
2PbS(s)+3O2(g)reverse arrow 2PbOs + 2SO2g Why is
3 answers
asked by
Helen
1,827 views
A student weighs out 0.568 g of KHP (molar mass=204g/mol) and titrates to the equivalence point with (36.78 cm cubed which is 3)
3 answers
asked by
Elleni
1,305 views
What is pH of the buffer 0.1 mol L-1 Na2HPO4/0.15 mol L-1 KH2PO4?
(Given Ka(H2PO4-)=6.2x10 power-8). Sorry if the power is
2 answers
asked by
Elleni
559 views
elements in which group form -2 ions
2 answers
asked by
Sally
573 views
Of KCl and NaCl, which has a higher lattice energy? What is lattice energy? Lost. Please help.
4 answers
asked by
Sally
1,352 views
1) A 25mL sample of the .265M HCI solution from the previous question is
titrated with a solution of NaOH. 28.25mL of the NaOH
6 answers
asked by
Jessica
889 views
Given that delta Hrxn for OH- ions is -229.6 kJ/mol, calculate the enthalpy of neutralization when I mole of a strong monoprotic
2 answers
asked by
Alexis
1,245 views
Calculate the cell potential for the following Galvanic cell:
Co(s) Co2+ (0.15 mol L-1, ag)Fe 2+ (0.68 mol L-1, ag)Fe(s) Given
1 answer
asked by
Elleni
403 views
The rate constant for decomposition of compound X was determined to be 1.0x10^-4 s-1 at 298 K and 1.0x10^-2 at 365 K. The
2 answers
asked by
Elleni
673 views
For the reaction SO3(g)---> SO2(g) + 1/2 O2(g), Kc= 16.7 at 1000 K. What is the value of Kc at 1000 K for the reaction
2 SO2 (g)
2 answers
asked by
Jalisa
980 views
How fast must a 138 g baseball travel in order to have a de Broglie wavelength that is equal to that of an x-ray photon with =
1 answer
asked by
HELP !
434 views
How many grams of BaCl2 are needed to make a 250mL of 15% solution?
1 answer
asked by
Kim
383 views
When 20.0 g C2H6 and 60.0 g O2 react to form CO2 and H2O, how many grams of water are formed?
2 answers
asked by
Jake
896 views
Calculate the Molarity of the solution that contains 4.00 grams of NaOH in a total volume of 1500.0 mL. [Molar Mass NaOH =
1 answer
asked by
stacy
407 views
Stuck on plugging info into formula, please show set up-At 10 degrees C carbon dioide gas has volume of 25.5 mL under pressure
1 answer
asked by
Sandra
378 views
Predict the signs of delta H (Enthalpy) and delta S (Entropy) for the evaporation of water at 85 C.
4 answers
asked by
James
1,424 views
A buffer solution contains 0.120M acetic acid and 0.150M sodium acetate.
a. How many moles of acetic acid and sodium acetate are
4 answers
asked by
Elizabeth
3,426 views
Substances A, B, and C can all act as oxidizing agents. In solution, A is green, B is yellow, and C is red. In the reactions in
2 answers
asked by
Lisa
624 views
I DO NOT understand the following! Please HELP :)
1st Part Substances A, B, and C can all act as oxidizing agents. In solution, A
2 answers
asked by
Lisa
973 views
please help!
You are given an unknown, colorless, solution that may contain only one salt from the following set: NaA, NaB, NaC.
3 answers
asked by
Marcus
1,446 views
1.14g of sodium bicarbonate (NaHCO3)is dissolved in 500 mL H2O. What is the Ph of the solution? Assume constant volume.
3 answers
asked by
Elizabeth
486 views
How much ice can be melted at 0oC by the condensation of 1.0 kg of steam at 100.oC?
(ΔHfus of ice = 6.01 kJ/mol; ΔHvap of water
3 answers
asked by
Molly
645 views
Calculate the vapor pressure of a solution of 0.39 mol of cholesterol in 5.4 mol of toluene at 32oC. Pure toluene has a vapor
4 answers
asked by
Molly
2,055 views
A sample of octane in equilibrium with its vapor in a closed 1.0 L container has a vapor pressure of 50 torr at 45oC. The
2 answers
asked by
Mollie
940 views
Indicate the number of unpaired electrons present in Kr Atom...?
2 answers
asked by
Rosie
567 views
Write a complete set of quantum numbers for the 5th electron added to H ion..(5th electron in any electron configuration).
n= l=
4 answers
asked by
Anonymous
1,891 views
How many milliliters of 1.55 M NaOH must be added to 125 mL of .19 M NaH2PO4 to make a buffer solution with a pH of 6.90?
I have
4 answers
asked by
Elizabeth
688 views
A hydrogen-like ion is an ion containing only one electron. The energy of the electron in a hydrogen-like ion is given by:
En=-(2
6 answers
asked by
Anonymous
1,054 views
If current is passed in an electrolytic cell containing sodium nitrate, NaNO3, dissolved in water, what are the products at the
3 answers
asked by
James
861 views
How do you calculate the value for Delta U for a system that loses 50 J of heat and has 150 J of work performed on it by the
1 answer
asked by
Heather
441 views
The eqm. Constant for a reaction is 2.48 at 25°C. what is the value of ΔG° (kJ) at this temperature? (R=8.314 J/k mol)
1 answer
asked by
Shanice
390 views
The eqm. Constant for a reaction is 2.48 at 25°C. what is the value of ΔG° (kJ) at this temperature? (R=8.314 J/k mol)
1 answer
asked by
Shanice
441 views
A 20.0 Ml sample of sulfuric acid is titrated with 25.0 ML of 1.0 M NaOH solution. What is the molarity of the sulfuric acid?
2 answers
asked by
Sa ndra
1,345 views
The eqm. Constant for a reaction is 2.48 at 25°C. what is the value of ΔG° (kJ) at this temperature? (R=8.314 J/k mol)
1 answer
asked by
Jalisa
355 views
The value of ΔG°f at 25°C for gaseous mercury is 31.85 KJ/mol. What is the vapor pressure of mercury at 25°C? [Hint:
1 answer
asked by
alice
881 views
Calculate the molar solubility of Mn(OH)2 in grams per liter when buffered at pH 8.5 Mn(OH)2=88.953g/mol; Ksp=1.9 x 10^-13
1 answer
asked by
Patrice
684 views
A 1.00-L solution saturated at 25°C with calcium oxalate (CaC2O4) contains 0.0061 g of CaC2O4. The solubility constant (Ksp)
1 answer
asked by
Patrice
748 views
Given 400.0 g of hot tea at 80.0C, what mass of ice at 0C must bea added to obtain iced tea at 10.0C? The specific heat of water
1 answer
asked by
Ashley
874 views
Which solution would have the lowest freezing point, 0.500 M NaCl or 0.500 M CaCl2?
2 answers
asked by
Sa ndra
539 views
A 50.0 mL sample of 6.0 M HCL is dulited to 200.0 mL. What is the new concentration of the acid?
4 answers
asked by
Sa ndra
2,703 views
48.70 mL of an HCl stock solution was transferred into a 500 mL volumetric flask and filled to the mark. 47.67 mL of the diluted
1 answer
asked by
Mark
450 views
What is the molarity of 7.52 ml of HCL solution and 5.393 of HC2H3O2 solution?
1 answer
asked by
Anonymous
300 views
1. From data below, calculate the total heat (in J) associated with the conversion of 0.514 mol ethanol gas (C2H6O) at 451°C
1 answer
asked by
Arian
506 views
1. From data below, calculate the total heat (in J) associated with the conversion of 0.514 mol ethanol gas (C2H6O) at 451°C
1 answer
asked by
Arian
954 views
1. From data below, calculate the total heat (in J) associated with the conversion of 0.514 mol ethanol gas (C2H6O) at 451°C
2 answers
asked by
Arian
515 views
A 32.85-{\rm g} sample of a solid is placed in a flask. Toluene, in which the solid is insoluble, is added to the flask so that
3 answers
asked by
Nicole
644 views
The radius of Xe is 1.3*10^-8 cm. A 100-mL flask is filled with Xe at a pressure of 1.4 atm and the temperature is 290 K.
1 answer
asked by
Meg
497 views
Calculate the volume of carbon dioxide produced from .025 g of aluminum carbonate and excess HCl at 25 degrees c and 745 toor
1 answer
asked by
Heather
379 views
A solution of sulfuric acid is 40.0% by mass and it has a density of 1.30g/mL, what is the molarity of the solution?
3 answers
asked by
Anonymous
602 views
The following data are obtained for the decomposition of N2O5 at a certain temperature:
2N2O5(g)↔4NO2(g) + O2(g) Time(s) 0 200
4 answers
asked by
cara
1,751 views
Molarity of .100 mole of urea (CH4N2O) in 250.0 mL of solution
2 answers
asked by
Audrey
1,111 views
The molar heat of reaction, H rxn, for the reaction of
Ca(s) + 2H+(aq) Ca2+(aq) + H2(g) is -544.789 kJ/mol and Hrxn, for the
3 answers
asked by
HELP PLEASE!
512 views
2.50 mL of ethyl acetate and 2.50 mL of distilled water are added to the 5.00 mL of 3 Molar HCl and the mixture is allowed to
2 answers
asked by
Tichele
558 views
The equilibrium constant Kc for the reaction N2(g) + 3H2(g) -> <- 2NH3 at 450 degrees celcius is 0.159. Calculate the
2 answers
asked by
Anonymous
906 views
Indicate whether either an increase or a decrease of presure obtained by changing the volume would increase the amount of
2 answers
asked by
Anonymous
501 views
Calculate the pH of a solution prepared by mixing 250.mL of 0.174 molal aqueous HF (density=1.10g/mL) with 38.7g of an aqueous
1 answer
asked by
Anonymous
635 views
Estimate the enthalpy change for the following reaction
OH(g)+CH4(g)==>CH3(g)+H2O(g)
1 answer
asked by
West
460 views
Determine how many grams of water can be produced from excess propane C3H8 and 2.55g oxygen? MM 02 = 32 and MM H2O = 18.2.
I
3 answers
asked by
Robyn
860 views
I think this should be easy but im stuck. Please help:
Suppose a compound could point in any of two directions in the solid and
2 answers
asked by
Jude
1,180 views
can someone please explain how to indicate where a label appears in a product? for example:
where the label appears in
1 answer
asked by
ana
889 views
Ok, so I’m working on this problem where I have to get electron per mole. I know that I need to get from Coulombs/mole of H2
2 answers
asked by
Tichele
509 views
If the voltage of the cell is -0.1288V at 25Celsius when [Pb2+]=0.1403M and the pressure of H2=1atm, what is the pH
Pb(s)+2H+(aq)
3 answers
asked by
Jude
403 views
How many grams of Al would be deposited from an aqueous solution of Al3+ with a current of 1.430A after 5hrs of deposition.
2 answers
asked by
Jude
489 views
A rock containing 238U and 206Pb was examined to determine its appropriate age. The molar ratio of 206Pb to 238U was 0.1462.
3 answers
asked by
Jude
569 views
How much time in years (assume a 365 day yr) would it take for a 1.6678g sample of 239Np to decay to a mass of 0.8671g if it has
2 answers
asked by
Jude
852 views
H2C=C=CH2 molecule is linear, what are they hybridization states of the carbon atoms? draw diagrams to show sigma and pi bonds.
4 answers
asked by
George
4,491 views
Which of the following ions possess a dipole moment: ClF2+, ClF2-, IF2+, or IF4-?
3 answers
asked by
Anita
1,887 views
What mass of ice, at 0.00 C can be converted to steam, at 100 degrees C, if it absorbs 1.00 x 10 (to the 6th power) Jules of
2 answers
asked by
Eileen
680 views
Which contains more sulfur, 35.2g CaSO4 or 35.7g NaSO4?
1 answer
asked by
Sydney
413 views
What is the pH when 10 mL of 1 M acetic acid is added to pure water so that the final volume is 100 mL? The Ka for acetic acid
1 answer
asked by
Jamal
1,174 views
If 10 mL of 1M NaOH are added to one liter of a buffer that is 0.3 M acetic acid and 0.2 M sodium acetate (Na+CH3COO-), how much
2 answers
asked by
Jamal
567 views
One liter of benzene (C6H6) is completely burned (oxidized) with air.
Write a balanced chemical equation to represent this
4 answers
asked by
Jenny
501 views
How many grams of solute are needed to prepare each of the following solutions?
A. 1.000 L of 0.180 M NaCl B. 250.0 mL of 0.150 M
3 answers
asked by
Bekah
1,420 views
Zinc, copper, lead, and mercury ions are toxic to Atlantic salmon at concentrations of 6.42 times 10 to the -2 mM, 7.16 times 10
2 answers
asked by
Bekah
574 views
Calculate the concentrations of the following solutions, assuming the volumes are exact measurements:
a. 18.64g of sodium
2 answers
asked by
Bekah
486 views
What is the final temperature, in oC, after a 26.5 g piece of ice, at 0oC, is placed in a styrofoam cup with 122 g of water
2 answers
asked by
John
571 views
Plaster of Paris is the compound calcium sulfate hemihydrate, CaSO4*1/2H2O
What mass of water is liberated when a 2.763 gram
2 answers
asked by
Roy
679 views
Plaster of Paris is the compound calcium sulfate hemihydrate, CaSO4*1/2H2O
What mass of water is liberated when a 2.763 gram
3 answers
asked by
Roy
1,417 views
I have no idea how to do this problem, and I've been searching through my book for an hour. Help please?
An energy of 2.0x10^2
4 answers
asked by
Mikaela
1,421 views
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