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Questions (280)
A student measures k for a certain blue dye to be 19.4 M^-1 at 560 nm. What is the molarity of the dye in a solution with an
3 answers
asked by
Gabby
1,215 views
A solution of magnesium chloride, MgCl2, is prepared by dissolving 19.0g of MgCl2 in 250 mL OF water.
a.) Calculate the weight
3 answers
asked by
Josh
1,238 views
A 0.750 g sample of an unknown substance is dissolved in 20.0 g of benzene, C6H6. The freezing point of the solution is 4.53 oC.
3 answers
asked by
CC
1,185 views
What is the molar concentration of sodium in a 200ml solution prepared from 1.223g of sodium phosphate?
3 answers
asked by
Danielle
1,129 views
To make 10 mL of 25 mM sodium standard, what volume of 1 M NaCl stock should be used?
250 mL 2.5 mL 0.25 mL 0.5 mL None of these
2 answers
asked by
vivek
1,121 views
A 100.0 mL portion of 0.250 M calium nitrate solution is mixed with 400.0 mL of .100M nitric acid solution. What is the final
6 answers
asked by
alex
1,129 views
An aqueous solution contains 0.216 M ascorbic acid (H2C6H6O6) and 0.131 M hydrochloric acid.
Calculate the ascorbate (C6H6O62-)
2 answers
asked by
Ana
1,114 views
a solution is prepared by mixing 1.0 grams of benzen(c6h6) in 100g of water to create a solution total volume of 100ml.calculate
2 answers
asked by
john
1,105 views
A scientist is mixing a chemical solution for an experiment. The solution contains 3/8 ounce of a chemical and 1/6 ounce saline
3 answers
asked by
Ann
1,100 views
An aqueous solution of copper (I) chloride is 15.7% by mass copper (I) chloride. Copper (I) is 35.8% by mass chlorine. If the
1 answer
asked by
Mom
1,107 views
You have a solution of 12.0 M HCl. You need 36.5 g of hydrochloric acid for a reaction in your chemistry lab. How many mL of
2 answers
asked by
Nur
1,070 views
A solution was made by dissolving 13.4 g of hydrated copper nitrate [Cu(NO3)2.3H20] in water and making it up to a volume of 250
2 answers
asked by
JordanPeara
1,107 views
A 36.0mL sample of 1.20 M KBr and a 56.0mL sample of 0.700 M KBr are mixed. The solution is then heated to evaporate water until
3 answers
asked by
Cecelia
1,034 views
a solution of 4.65 of a carbohydrate in 100.0g of water has a density of 1.016g/mL and an osmotic pressure of 3.18 atm at 20.0
2 answers
asked by
Amy
1,011 views
Consider a solution containing 0.150 M Ba(OH)2. Calulate the pH.
2 answers
asked by
Anonymous
986 views
What weight of NaOH would be required to prepare 3000ml of a 2.5M solution?
3 answers
asked by
Jessi
982 views
Calculate the [H], [OH], pH and the pOH of this solution; 0.0025 M NaOH
2 answers
asked by
Shane
976 views
In a 1.0x10^-6 M soltution of HNO3(aq), identify the relative molar amounts of these species.
H2O , HNO3, H3O+,NO3-, OH-
3 answers
asked by
Alexis Moran
984 views
a solution of sodium hydroxide is standardized against potassium hydrogen phthalate (KHP, formula weight 204.2 g/mol). From the
2 answers
asked by
debbie
955 views
Calculate the hydronium ion concentration and pH in a 0.037 M solution of sodium formate, NaHCO2.
hydronium ion concentration i
3 answers
asked by
sara
929 views
What is the pH of a saturated zinc hydroxide solution?
2 answers
asked by
Julian
893 views
Assume you poured 5.00 g of KOH in 250 mL of pure water. What is the molarity of the solution you made?
2 answers
asked by
Bea
871 views
NaOH has a MW of 40. A 0.12M solution is made by adding how much NaOH to 100mL of water?
2 answers
asked by
jake
857 views
What is the mass of hydrogen peroxide, H2O2, in a 250 g sample of a 2.75% by weight solution?
2 answers
asked by
Anonymous
828 views
If you are using 5.25% (mass/mass) bleach solution and you determine that the density of the bleach solution is 1.08 g/mL, how
1 answer
asked by
Rob
839 views
A chemist prepares a solution of calcium bromide (CaBr2) by measuring out 0.54 kg of calcium bromide into a 350 mL volumetric
1 answer
asked by
Nadia
43 views
solution of 0.1molar NH4OH and 0.1 NH4CL ph=9.25 calculate kb for NH4OH?
4 answers
asked by
ankit
811 views
You need to make an aqueous solution of 0.121 M magnesium chloride for an experiment in lab, using a 250 mL volumetric flask.
3 answers
asked by
Linda
842 views
Calculate the [H3O+] of each of the following H2SO4 solutions.
For a 0.50 M soln How do I reach the answer? Do I have to use a
4 answers
asked by
Anonymous
776 views
A scientist wants to make a solution of tribasic sodium phosphate, , for a laboratory experiment. How many grams of will be
3 answers
asked by
Marry
817 views
You have to prepare a pH 3.50 buffer and you have .10M HCOOH and .10M HCOONa, how many milliliters of each solution do you neeed
2 answers
asked by
Anonymous
801 views
0.150 L of 0.490 M H2SO4 is mixed with 0.100 L of 0.250 M KOH. What concentration of sulfuric acid remains after neutralization?
2 answers
asked by
Harley
768 views
What mass of ethylene glycol C2H6O2, the main component of antifreeze, must be added to 10.0 L water to produce a solution for
3 answers
asked by
Tanya
792 views
Commercial bleach contains 5.25% (by mass) of NaClO in water. It has a density of 1.08 g/mL. Calculate the molarity of this
1 answer
asked by
Drew
771 views
calculate the concentration of sodium benzoate that must be present in a 2.0M solution of benzoic acid (C6H5COOH) to produce a
1 answer
asked by
Lucinda
769 views
1 mole of each of the following substances is dissolved in 1 L of water. Order them from most ions (1.) to least ions (4.) in
4 answers
asked by
Tatiyana
734 views
What are the concentrations of all the solute species in a 1.2 M solution of acetic acid, HC2H3O2?
(a) [H3O+], M; (b) [OH-], M;
2 answers
asked by
Lozz
747 views
A 3.5g sample of potassium chloride(KCl)is dissolved in 10mL of water.The resulting solution is the added to 60mL of a 0.5M
3 answers
asked by
RUBY
776 views
Find the mass of urea needed to prepare 50.1 of a solution in water in which the mole fraction of urea is 7.50×10−2.
6 answers
asked by
Kelley
743 views
A chemist has a supply of supersaturated CuSO4 solution that contains 230.0grams per litre of water. The chemist also has
3 answers
asked by
Matt
711 views
A stock solution was prepared by dissolving exactly 0.4000 g of pure ASA (180.16g/mol) in 10.00 mL of NaOH and heating the
2 answers
asked by
Anonymous
718 views
Concentrated aqueous ammonia contains 1.00 mol NH3 dissolved in 2.50 mol H2O. What is the mole fraction of NH3 in concentrated
2 answers
asked by
T
714 views
A sample of nitric acid has a density of 1.42g/cm3 and contains 69.5% by weight of the pure acid.What is the molarity of the
2 answers
asked by
Kester
680 views
How many milliliters of concentrated nitric acid, HNO3, 70 % (wt/wt) are required to prepare 1 liter of 0.250 M solution? The
3 answers
asked by
karen
710 views
If 5.29 g of CuNO3 is dissolved in water to make a 0.370 M solution, what is the volume of the solution?
2 answers
asked by
Rasschael
680 views
How many grams of NaOH would you dissolve in pure water to make 400 mL of a 2.5% NaOH solution ? MW of NaOH = 40 g/mol
5 answers
asked by
Jay
694 views
calculate the concentration of potassium in grams per liter after mixing 100ml of 0.250m and 200ml of 1.00m k2s04
3 answers
asked by
Divao
673 views
A solution of NaOH(aq) contains 7.7 grams of NaOH in 93 mL of solution. Calculate the pH at 25◦C.
---- 7.7 grams x (1
2 answers
asked by
Edwin
693 views
Before investigating the scene, the technician must dilute the luminol solution to a concentration of 4.00×10−2M . The
2 answers
asked by
LIO
664 views
Calculate the volume in liters required to prepare a 5.00M solution of HCL using 15.4gof HCL.
2 answers
asked by
BIBI
670 views
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Parent Categories (6)
Chemistry
Concentration
Laboratory Materials
Science and Chemistry
Science/Chemistry
Stoichiometry