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Fai

Questions and answers by visitors named Fai

Questions (112)

A 0.4671g sample containing sodium bicarbonate was titirated with hcl requiring 40.72ml. The acid was standardized by titrating
1. 4 answers
2. 4,035 views
25g of a sample of ferrous sulphate was dissolved in water containing dilute h2s04 and the volume made up to one litre. 25ml of
1. 2 answers
2. 596 views
I'm give the following data: Q*, QG, QH, QE for a 24-hour period, i'm required to plot these 4 data on the same graph, which
1. 1 answer
2. 564 views
Factor the following expression completely: 9x^4-81y^2
1. 1 answer
2. 374 views
concentrated hydrochloric acid is a 38% solution of hcl in water and has a density of 1.18g/ml. How many milliliters of
1. 2 answers
2. 613 views
How much dil HCL (10% w/w) HCL specific gravity = 1.045 would be required to prepare 2000ml of a solution containing 0.005 molar
1. 2 answers
2. 609 views
Concentrated hydrochloric acid is a 38% solution of HCL in water and has a density of 1.18g/ml. How many milliliters of
1. 2 answers
2. 1,013 views
Calculate the PH concentrated hydrochloric acid if this solution is 24.8% HCL by weight and has a density of 1.16g/ml. I do not
1. 3 answers
2. 675 views
A prescription calls for 250ml of a 0.1N hydrochloric acid HCL solution. How many ml of concentrated hydrochloric acid are
1. 2 answers
2. 1,081 views
How much concentrated hydrochloric acid solution 36% HCL by mass d=1.18g/ml in milliliters is required to produce 11.0L of 0.296
1. 2 answers
2. 1,045 views
How much ethanol C2H50H in liters d=0.789g/ml must be dissolved in water to produce 190.5 of 1.65M c2H50H ? Molarity problem.
1. 1 answer
2. 465 views
How many ml of terpin hydrate elixirs containing 33mg/5ml and 5mg/5ml needed to prepare 6 fl oz of an elixir containing 4mg
1. 1 answer
2. 435 views
A volume of 40.0 of aqueous potassium hydroxide was titrated against a standard solution of sulfuric acid h2so4. What was the
1. 2 answers
2. 656 views
A sample of solid monoprotic acid with molar mass equal to 169.7 g/mol was titrated with 0.1599M sodium hydroxide solution.
1. 2 answers
2. 536 views
What volume of a concentrated hcl solution which is 36% by mass and has a density of 1.179 g/ml to make 4.85L of an hcl solution
1. 5 answers
2. 1,545 views
A solution of sodium cyanide NACN has a PH of 12.10. How many grams of NACN are in 425ml of solution with the same PH?Please
1. 5 answers
2. 1,611 views
A 0.446g sample of an unknown monoprotic acid was titirated with 0.105M KOH the molar mass is 120g/mol. What is the PKA value?Wh
1. 2 answers
2. 817 views
Concentrated hydrochloric acid has specific gravity of 1.18 and 36% hcl weight. What volume of concentrated hcl must be diluted
1. 2 answers
2. 880 views
Concentrated hydrochloric acid is a 38% solution of hcl in water and has a density of 1.18g/ml. How many milliliters of
1. 2 answers
2. 991 views
How to calculate PH 1.9 =0.0126MI do not still understand. I want you step by step to calculate for me. Thank you.
1. 3 answers
2. 284 views
How to calculate PH 2.13 = 0.007M Why?Please show for me. I want you step by step for me.
1. 2 answers
2. 834 views
A solution of is prepared by adding 50.3ml of concentrated hydrochloric acid and 16.6ml of concentrated nitric acid to 300ml of
1. 3 answers
2. 617 views
Concentrated hydrochloric acid has specific gravity 1.18 and 36% hcl weight. What volume of concentrated hcl must be diluted to
1. 2 answers
2. 977 views
How much ethanol C2H50H in liters d = 0.789g/ml must be dissolved in water to produce 190.5 of 1.65M C2H50H? Molarity problem.My
1. 1 answer
2. 407 views
A solution of sodium cyanide nacn has a ph of 12.10. How many grams of nacn are in 425ml of solution with the same ph?I do not
1. 2 answers
2. 728 views
A 0.446g sample of an unknown monoprotic acid was titrated with 0.105M KOH the molar mass is 120g/mol. What is the pka value?My
1. 2 answers
2. 813 views
Suppose a student started with 129mg transcinnamic acid and 0.50ml of 10% bromine solution and after the reaction and workup
1. 1 answer
2. 453 views
What is the mass/ vol% ethanol in an ethanol water solution with density of 0.875g/ml and containing 65% ethanol by volume? The
1. 4 answers
2. 1,754 views
A 0.446g sample of an unknown monoproctic acid was titrated with 0.105 M KOH The molar mass is 120g/mol. What is the PKA value?P
1. 1 answer
2. 426 views
Concentrated hydrochloric acid is a 38% solution of hcl in water and has a density of 1.18g/ml. How many milliliters of
1. 1 answer
2. 472 views
What is the molarity of 100ml of ethanol dissolved in 1.5L of water? Ethanol has a specific of 0.789, and its molecular weight
1. 1 answer
2. 415 views
A flask containing 5.00ml of 3M hcl solution required 14.45 of 1.00M naoh for titration. How many moles of hcl are present in
1. 2 answers
2. 949 views
A flask containing 5ml of 3M hcl solution required 14.45ml of 1M NAOH for titration. How many moles of hcl are present in the
1. 2 answers
2. 1,049 views
Assuming the density of a 5% acetic acid solution is 1g/ml, determine the volume of the acetic acid solution necessary to
1. 2 answers
2. 574 views
Concentrated hydrochloric acid is a 38% solution of hcl in water and has a density of 1.18g/ml. How many milliliters of
1. 1 answer
2. 515 views
A solution of ethanol (C2H50H) in water is prepared by dissolving 76.9ml of ethanol (density0.79g/cm3) in enough water to make
1. 3 answers
2. 540 views
Find the number of mg Na2co3 FW = 106g/mol required to prepare 500ml of 9.2ppm NA solution.ppm = mg/L 9.2mg/1000ml x= 0.0092 x
1. 2 answers
2. 576 views
A 5g mn sample was dissolved in 100ml water. If the percentage of M (At wt =55g/mol) in the sample is about 5%. What volume is
1. 2 answers
2. 1,231 views
A 0.4671g sample containing sodium bicarbonate was titrated with HCL requiring 40.72ml. The acid was standardized by titrating
1. 5 answers
2. 3,328 views
A 0.46771g sample containing sodium bicarbonate was titrated with hcl requiring 40.72ml. The acid was standardized by titrating
1. 1 answer
2. 422 views
A 0.682g sample of impure NAHco3 yielded a solid residue consisting of NAc03 and other solid with a mass of 0.467g. What was the
1. 2 answers
2. 557 views
A 0.682g sample of impure Na2hco3 yield a solid residue consisting of nahco3 and other solid a mass of 0.467g. What was the mass
1. 1 answer
2. 478 views
A 0.200g sample containing mn02 was dissolved and analyzed by addiction of 50ml of 0.100M fe to drive the reation. The excess fe
1. 1 answer
2. 327 views
A 1.252g sample containing iron dissolved and converted to Fe followed by ADDITION OF 25ML OF 0..01m K2CR2 07. THE EXCESS
1. 1 answer
2. 401 views
An aqueous solution is 0.273m kcl. What is the molar concentration of potassium chloride, kcl? The density of the solution is
1. 4 answers
2. 1,561 views
A 1.252g sample containing iron is dissolved and converted to FE 2+ followed by addition of 25ml of 0.01M k2 cr2 07. The excess
1. 1 answer
2. 368 views
6.85ml of 0.015M SN2+
1. 1 answer
2. 235 views
10g of nacl were added to 10ml of water. he resulting solution was diluted to be a final volume of 250ml.Calculate the molarity
1. 3 answers
2. 639 views
10g of nacl were added to 10ml of water. the resulting solution was diluted to be a final volume of 250ml. Given the density of
1. 1 answer
2. 500 views
8.058g x 10-2 kg of washing soda na2co3 10h20 is dissolved in water to obtain 1L of a solution of density 1077.2kg/m3. Calculate
1. 4 answers
2. 1,710 views
100 Liters of air at STP is slowly bubbled through 200ml of 0.03N Ba(OH)2 solution. The Baco3 formed due to reaction is filtered
1. 3 answers
2. 606 views
Calculate the molarity of thiosulfate solution if 0.400mg of Kl03 required 100ml of the thiosulfate solution provided that
1. 1 answer
2. 403 views
502g sample of dry cac03 and cacl2 mixture was dissolved in 25ml of 0.925 M HCL solution. What was cacl2 percentage in original
1. 2 answers
2. 524 views
calculate the molarity of H2O2 if 25ml of H2O2 required 12 ml of 0.1M KMN04?The right answer 0.24M who helps
1. 1 answer
2. 377 views
In the previous example, how many ml of 0.1M KMN04 are required to react with 30ml of 0.05M H2o2? The answer 3mlwho helps
1. 1 answer
2. 349 views
In the previous example, how many ml of 0.1M KMN04 are required to react with 30ml of 0.05M H202? The answer 3mlWho helps
1. 1 answer
2. 329 views
what weight of na2c03 of 95% purity would be required to neutralize 45.6ml of 0.235N acid?Who Helps
1. 2 answers
2. 545 views
5ml of 8N HN03, 4.8ml of 5N HCL and a certain volume of 17M H2s04 are mixed together and made up to 2 liter 30ml of this acid
1. 3 answers
2. 505 views
5ml of 8N Hn03, 4.8ml of 5N hcl and a certain volume of 17M h2s04 are mixed together and made up to 2 liter. 30ml of this acid
1. 1 answer
2. 469 views
What weight of na2co3 of 95% purity would be required to neutralize 45.6ml of 0.235n acid?I want you step by step clearly
1. 3 answers
2. 2,034 views
How many ml of 0.05M kmn04 acidic are diluted to oxidize 2gm of fes04 is diluted solutionThe answer 52.63 ml I want you step by
1. 1 answer
2. 368 views
80ml of hcl is added to 2.5gm of pure cac03 when the reaction is over, then 0.5gm cac03 is left. Find the normality of the acidT
1. 2 answers
2. 924 views
calculate the number of g fes04 that will be oxidized by 24ml of a 250N Kmn04 in a solution acidified with sulfuric acid. The
1. 3 answers
2. 591 views
How many grams of kmn04 are contained in 35ml of 0.05N kmn04 used in the following reaction in basic solution.the answer 0.0922g
1. 1 answer
2. 296 views
A definite amount of NH4cl was boiled with 100ml of 0.8N naoh for complete reaction. After the reaction, the reactant mixture
1. 2 answers
2. 500 views
A definite amount of nh4cl was boiled with 100ml of 0.8N naoh for complete reaction. After the reaction, the reaction mixture
1. 1 answer
2. 421 views
In the previous example, how many ml of 0.1M kmn04 are required to react with 30ml of 0.05M h202?the answer 3ml who helps
1. 1 answer
2. 372 views
A definite amount of nh4cl was boiled with 100ml of 0.8N naoh for complete reaction. After the reaction, the reactant mixture
1. 1 answer
2. 422 views
A definite amount of NH4cl was boiled with 100ml of 0.8N naoh for complete reaction . After the reaction mixture containing
1. 2 answers
2. 1,179 views
25ml of a solution of na2c03 having a specific gravity of 1.25g ml required 32.9ml of a solution of hcl containing 109.5g of the
1. 2 answers
2. 926 views
25ml of a solution of na2c03 having a specific gravity of 1.25g ml required 32.9ml of a solution of hcl containing 109.5g of the
1. 2 answers
2. 523 views
25ml of a solution of na2c03 having a sepcific gravity of 1.25g solution of hcl containing 109.5g of the acid per litre for
1. 3 answers
2. 1,238 views
0.50g of a mixture of K2c03 and Li2c03 requires 30ml of a 0.25N hcl solution for neutralization. What is the percentage
1. 2 answers
2. 589 views
0.50g of mixture of k2c03 and li2c03 requires 30ml of a 0.25N HCL solution for neutralization. What is the percentage
1. 2 answers
2. 1,051 views
A 1.2g mixture of na2c03 and k2c03 was dissolved in water to form 100cm3 of s solution, 20cm3 of this solution required 40cm3 of
1. 1 answer
2. 464 views
Assume that 50ml of 0.01M edta solution were added to 25ml of co solution and the excess edta required 20ml of 0.005M mg
1. 1 answer
2. 370 views
Find the concentration of calcium in ppm in a 3.5g pill that contains 40.5mg of ca?Answer 1.16ppm Bob helps me
1. 6 answers
2. 3,538 views
0.5g of fuming h2s04 oleum is diluted with water. This solution is completely neutralized by 26.7ml of 0.4N naoh. Find the
1. 2 answers
2. 555 views
The formula weight of an acid is 82. In a titration, 100cm3 of the solution of this acid containing 39g of this acid per litre
1. 3 answers
2. 1,493 views
A 150 mg/dl glucose solution was diluted 1:2. Then 0.5ml of it was added to 4.5ml saline 2 ml of this solution was diluted to
1. 2 answers
2. 853 views
A 150mg/dl glucose solution was diluted 1:2. Then 0.5ml of it was added to 4.5ml saline. 2ml of this solution was diluted to
1. 1 answer
2. 471 views
A 0.5g of fuming h2so4 oleum is diluted with water. This solution is completedly neutralized by 26.7ml of 0.4N naoh. Find the
1. 4 answers
2. 3,383 views
0.5g of fuming h2s04 oleum is diluted with water. This solution is completely neutralized by 26.7ml of 0.4N naoh. Find the
1. 1 answer
2. 474 views
which would be the most appropriate measuring device for the following prescription: Give 0.7ml of metoclopramide syrup every
1. 1 answer
2. 362 views
Give 0.7ml of metoclopramide syrup very six hoursanwer 1 tsp oral syringe with 1 ml marking Who help
1. 1 answer
2. 344 views
Aspirin c9h8oh molar mass = 180.1g/mol can be prepared by the reaction of salicylic acid c7h603 molar mass = 13801 g/mol with
1. 1 answer
2. 439 views
what mass of 25% ba(n03)2 solution contain 40 grams of ba(n03)2 ?Answer 160g My calculation 40g/261.37g/mol = 0.15305/0.25g =
1. 1 answer
2. 345 views
1.64g of a mixture of cac03 and mgc03 was dissolved in 50ml of 0.8M hcl. The excess of acid required 16ml of 0.25M naoh for
1. 1 answer
2. 333 views
1.64g of a mixture of cac03 and mgc03 was dissolved in 50ml of 0.8M hcl. The excess of acid required 16ml of 0.25M naoh for
1. 1 answer
2. 410 views
1.64g of a mixture of cac03 and mhco3 was dissolved in 50ml of 0.8M hcl. The excess of acid required 16ml of 0.25M naoh for
1. 2 answers
2. 533 views
calculate the number of molecule h2s04 present in 250ml of 98% by mass of sulphuric solution. Density of solution is 1.84g/mlAns
1. 1 answer
2. 301 views
0.224g sample that contained only bacl2 and kbr required 19.7ml of 0.1M agn03 to react the end point. Calculate the percent of
1. 1 answer
2. 393 views
50gm of a sample of ca(oh)s is dissolved in 50ml of 0.5N hcl solution. The excess of hcl was titrated with 0.3N -naoh. The
1. 1 answer
2. 414 views
Determine the volume of diluted nitric acid d= 1.11g/ml, 19% hn03. That can be prepared by diluting with water 50ml of conc.
1. 4 answers
2. 920 views
Determine the volume of diluted nitric acid D1.11g/ml, 19% hn03. That can be prepared by diluting with water 50ml of conc hn03
1. 1 answer
2. 461 views
1.64g of a mixture of cac03 and mgc03 was dissolved in 50ml of 0.8M hcl. The excess of acid required 16ml of 0.25M naoh for
1. 1 answer
2. 406 views
1.64g of a mixture of cac03 and mgc03 was dissolved in 50ml of 0.8 m Hcl. The excess of acid required 16ml of 0.25< NAOH for
1. 4 answers
2. 1,446 views
0.224g sample the contained only bacl2 and kbr required 19.7ml of 0.1M agn03 to reach the end point. Calculate the percent of
1. 3 answers
2. 411 views
0.224g sample that contained only bacl2 and kbr required 19.7ml of 0.1M ango3 to reach the end point. Calculate the percentage
1. 1 answer
2. 463 views
you need to use 3 solutions of drug H containing respectively 50%, 20% and 5% to make 600ml of 10% drug H. How much of the 50%
1. 3 answers
2. 675 views

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