a density of 1.0 M solution of NaCL
29,680 results, page 59

Chemistry
Table salt, NaCl, and sugar C12H22O11 are accidentally mixed. A 5.50g sample is burned and 3.60g of CO2 is produced. What was the mass percentage of the table salt mixture? 
Chemistry
Let’s assume you have 250 ml of a 1.3M KOH solution and you want to neutralize it with the acid HBr. It takes 350 ml of the HBr solution to do so. What must have been the molarity of the HBr solution? HBr(aq) + KOH(aq) => KBr(aq) + H2O(l) The stoichiometry is already ... 
math
how many gallons of a 12% indicator solution must be mixed with a 20% indicator solution to get 10 gallons of a 14% solution 
math
how many liters of a 60% antifreeze solution should be added to 9 liters of a 30% solution to get a 50% antifreeze solution 
Organic Chemistry
Hello, I just have a quick question that I would like to have clarified. According to my textbook definition, NaBH4 (a reducing agent) can be used in solution in alcohols or even solution in water  provided the solution is alkaline." However, my textbook, in all of the ... 
chemistry
If you pass 10.0mL of a 50.0mL solution of [Co(en)2Cl2]Cl that has been reduced with Zn through a cation exchange column, you will obtain a solution that has three H+ ions for every Co3+ ion that was originally present in the sample. These H+ ions are titrated with 0.10M NaOH... 
Chemistry
Magnesium sulfate is often used it first aid hotpacks giving off heat when dissolved in water. When 2.00 g of MgSO4 dissolves in 15.0 mL of water (d= 1.00g/mL) at 25.0ºC, 1.51 kJ of heat is evolved. A) Write the balanced equation for this reaction. I have: MgSO4 + H2O >... 
chemistry
Sodium thiosulfate, Na2S2O3, is used as a fixer in photographic film developing. The amount of Na2S2O3 in a solution can be determined by a titration with iodine, I2, according to the equation: 2Na2S2O3(aq) + I2(aq) > Na2S4O6 +2NaI(aq). Calculate the concentration of the ... 
chem
How would u prepare each of the following solutions 100 mL of a 245 ppm solution of urea, CH4N2O, in water and How would u prepare each of the following solution 100 mL of an aqueous solution whose K+ concentration is 0.084 M Write up the procedure, and I will gladly check it... 
Chemistry
A solution of I2 was standardized with ascorbic acid. Using a .1000 g sample of pure ascorbic acid, 25.32 mL of I2 were required to reach the starch end point. A. What is the molarity of the iodine solution? B. What is the titer of the iodine solution? I've got answer to the ... 
science
6g of impure NaOH was dissolved in 100ml of a solution.0.25molar solution of the base utilize 27.6ml of the solution containing 6g of trioxonitrate(5)acid.calculate (a)molar concentration of acid (b) molar concentration of base (c) mass of the base (d) % purity of the base 
Chemistry
A chemist dissolves 0.095 g of CuSO4 · 5H2O in water and dilutes the solution to the mark in a 500mL volumetric flask. A 39.7mL sample of this solution is then transferred to a second 500mL volumetric flask and diluted. What is the molarity of CuSO4 in the second solution? 
math
Ex 2: 2x+7=22 2x+77=227 2x=15 2x/(2)=15/(2) I do not have to switch the equality sign. Even if I did it would not look any different. x=7.5 Check: 2x+7=22 2(7.5)+7=22 my solution is that x=7.5 so I will just put that in to see if it works. 15+7=22 22=22 Yes. It ... 
Chemistry
A cold pack manufacturer has decided to change the chemical in their cold pack from ammonium nitrate to ammonium chloride, a safer chemical. The original cold pack formulation used 100.0g of room temperature (27.0C) water and 35 g of ammonium nitrate. Assume that the solution ... 
chemistry
I have two solutions of 0.1 Molar. A solution of magnesium chloride and a solution of potassium chloride. I thought that the 0.1 M solution of magnesium chloride would conduct electricity better than a 0.1 M solution of potassium chloride. I did a lab in my chemistry class but... 
maths
The percentage of sugar in a solution of sugar and water is 9%. If 4 litres of this solution is diluted by adding 500mL of water, what is the percentage of sugar in the new solution? 
chemistry
Calculate ΔG at 25°C for the precipitation of lead(II) chloride from mixing 100. mL of 0.025 M lead(II) nitrate solution with 100. mL of 0.15 M sodium chloride solution. The ΔG° for the reaction at 25°C = −27.36 kJ/mol. (Hint: write out reaction equation... 
Biology
Using a special balloon that is permeable to water but not sucrose to make an "artificial" cell. The balloon is filled with a solution of 20% sucrose and 80% water and is immersed in a beaker containing a solution of 40% sucrose and 60% water. The solution in the balloon is ? 
Algebra
1.Solve (x)/(x+10)+(x3)/(x+2)=7/5..I got that there is no solution, is that correct? 2. Solve (x)/(x5)+1=(5)/(x5)..I got that there is no solution for this one too, is that correct? 3. Express your result in simplest form, (4)/(xy)+(6)/(xy)..I got (10)/(xy) is that correct... 
Physics  Buoyancy
A sphere of mass of m = 1.69 kg is first placed directly on the plate of an electronic scale. The scale shows 16.58 N as the weight of the object. A large beaker containing a liquid with a density of 783 kg/m^3 is then placed on the scale and the scale is tared (i.e. zeroed to... 
chemistry
2.) If you pass 10.0mL of a 50.0mL solution of [Co(en)2Cl2]Cl that has been reduced with Zn through a cation exchange column, you will obtain a solution that has three H+ ions for every Co3+ ion that was originally present in the sample. These H+ ions are titrated with 0.10M ... 
Chemistry
I have a lab for chemistry that I have to turn in soon, and I have no idea what the major and minor species if any of each of the substances we tested. Can someone please help me answer which one is the major/minor species of each of the elements? They are: 1. H2O(deionized)[... 
Chemistry
I have a lab for chemistry that I have to turn in soon, and I have no idea what the major and minor species if any of each of the substances we tested. Can someone please help me answer which one is the major/minor species of each of the elements? They are: 1. H2O(deionized)[... 
Chemistry
A 25.00mL sample of an H2SO4 (2 and 4 are subscripted) solution of unknown concentration is titrated with a .1328 M KOH solution. A volume of 38.33 mL of KOH was required to reach the endpoint. What is the concentration of the unknown H2SO4 (again, the 2 and 4 are subscripted... 
Chemistry
A 25.00mL sample of an H2SO4 (2 and 4 are subscripted) solution of unknown concentration is titrated with a .1328 M KOH solution. A volume of 38.33 mL of KOH was required to reach the endpoint. What is the concentration of the unknown H2SO4 (again, the 2 and 4 are subscripted... 
physics , math
The hydrostatic equation holds not just for air, but for other fluids such as water (air, though it is a gas, is often referred to as a 'fluid') as well. In the case of water the equation becomes even easier, as water (as opposed to air) can be treated as incompressible, ... 
science  check my answers!
help pls asap!!!!! check my answers!!! 4.) A certain object has a volume of 25.0 mL and a mass of 100g. What is the density of the object? a)0.250 g/mL b) 4.00/mL*** c)125 g/mL d) 2500 g/mL 5.)Which of the following is a chemical property of aluminum? a)The melting point of ... 
Pharmacy Technician
RX: Chlorpheniramine 100 ml Lidocaine 2 oz Banana flavoring 1 tsp Take 7ml BID Refrigerator medication at 40°F. 1. What is the final volume in ml? 2. Convert: 40°F = ______ °C=4 3. How many 1oz bottles will this solution fill? 4. How many days will this solution last? 5. ... 
Chemistry
a class reacts 50.00ml samples of 0.200 mol/L potassium phosphate solution with an excess of 0.120 mol/L lead(II) nitrate solution. Which reagent is intended to be the limiting reagent, what is he minimum volume of lead II nitrate solution required. How do you convert the ... 
CHEMISTRY
A solution of a metal carbonate M2CO3, was prepared by dissolving 7.46 g of the anhydrous solid in water to give 1000cm^3 of solution. 25.0cm^3 of this solution reacted with 27.0cm^3 of 0.100 mol/dm^3 hydrochloric acid. Calculate the relative formula mass of M2CO3 and hence ... 
Math
A chemist working on a flu vaccine needs to mix a 10% sodiumiodine solution with a 60% sodiumiodine solution to obtain a 50milliliter mixture. Write the amount of sodium iodine in the mixture, S, in milliliters, as a function of the number of milliliters of the 10% solution... 
science
Ions are electrically charged particles that are formed when certain compounds are dissolved in water. These solutions will conduct electricity. The Swedish scientist Svante Arrhenius coined the term ion (which means wanderer) to explain why solutions of electrolytes will ... 
chemistry
a chloride standard containing 100mmol/L of chloride ion can be prepared by dissolving the following amount of NACL in 1000ml of distilled water. dont know how to prepare a standard but heres my math 
Chemistry
How many milliliters of 0.0850 M Na3PO4(aq) will react with 22.00 mL of 0.0800 M MgCl2(aq)? 3 MgCl2(aq) + 2 Na3PO4(aq) ==> Mg3(PO4)2(s) + 6 NaCl(aq) V x M = V x M (22.00mL)(0.0800M) = (0.0850M)(x) Is this the correct setup? Does it have 4 sigfigs, or am I wrong? 
Chemistry
For the following acidbase reaction, calculate the mass (in grams) of each acid necessary to completely react with and neutralize 5.00 g of the base. HCl(aq)+ NaOH(aq)>H20(l)+NaCl(aq) Please explain how to do this. 
chemistry
'24.6 mL of 0.488 M NaCl is added to 24.6 mL of 0.312 M AgNO3. How many moles of AgCl would precipitate? What would be the concentrations of each of the ions in the reaction mixture after the reaction? Ion Concentration (M) Ag+ M NO3 M Na+ M Cl M' 
Chemistry
Hi,can I have your help? I'm just trying to solve a few Dilution Solution problems. I'm stuck on these two,and I wish you could help. Here's one: A 500 mL bottle of concentrated acetic acid is diluted to make a 5.0% solution. Find the volume of diluted that is prepared? ... 
science(chem)
I'm making different concentrations of ethanol and I just wanted to check my calculations and method. Making ethanol concentrations of: 0.40% 0.30% 0.20% 0.10% 0.05% To make the 0.40% ethanol from stock solution using 100ml volumetric flask: (xg ethanol)/(100ml) x 100= 0.40% ... 
Physics Classical Mechanics
A hydrometer is a device that measures the density of a liquid. The one shown in the figure has a cylindrical bulb of radius R attached to a cylindrical stem of radius r and length l. When placed in a liquid, the device floats as shown in the figure with a length h of stem ... 
chemistry
Consider a buffer solution consisting of CH3NH3Cl and CH3NH2. Which of the following statements are true concerning this solution? (Ka for CH3NH3+ = 2.3 x 10 11). 1. A solution consisting of 0.1 M CH3NH3Cl and 0.1 M CH3NH2 would be a more effective buffer than one containing ... 
chem
A sample of 45.0 ml of 0.750M AgNO3 solution is added to 65.0ml of 1.375M Cr(NO3)3 solution. Calculate the resultant concentration of nitrate ions in the mixture. 
chem
how many grams of a precipitate will form when you mix 45 ml of a 3.5M silver nitrate solution with 45 ml of a 5.4 M magnesium chloride solution i sorted the problem but have no clue how to start 
chem101
A 7.2 ´ 103 M solution of acetic acid is 5.0% dissociated. In a 7.2 ´ 104 M solution, the percentage of dissociation would be Value A. The same. B. >5%. C. <5%. D. zero. E. none of these. pls explain why the answer is B 
chemistry
A scientist wants to make a solution of tribasic sodium phosphate, , for a laboratory experiment. How many grams of will be needed to produce 400 of a solution that has a concentration of ions of 1.20 ? 
Chemistry
Refer to the calibration curve shown in the experiment. If the absorbance of the solution is 0.400, what is the concentration of the iron in that solution? Show or explain how you arrived at your answer. 
chemistry
A potassium nitrate solution is prepared by dissolving 2.3 g of KNO3 in 25 mL of water. What is the concentration of this solution in units of grams of solute per 100 mL of solvent? 
algebra
solve the inequality. Express the solution using interval notation and graph the solution set on the real number line x4/x^24 greater or equal to O 
chemistry
Calculate the concentration in molarity of sugar in a solution made by dissolving 0.34 moles of dextrose (C6H12O6) in enough water to make 3.00 Liters of solution 
chemistry
3. Compound A is provided as a 500mM solution. If 12.5 mL is taken and added to 12.5mL of water, how many moles (or millimoles / micromoles) are there per 0.1mL of the diluted solution? 
science
Compound A is provided as a 500mM solution. If 12.5 mL is taken and added to 12.5mL of water, how many moles (or millimoles / micromoles) are there per 0.1mL of the diluted solution? 
Chemistry
A solution that contains 2.047 x 10^1 M of acid, HA, and 1.808 x 10^1 M of its conjugate base, A, has a pH of 4.196. What is the pH after 1.629 x 10^3 mol NaOH is added to 5.961 x 10^1 L of this solution? 
analytical chemistry
Calculate the volume (mL) of 2.81 M magnesium phosphate solution require to prepare 43.20 mL of 2.1000 %w/v solution of Mg3(PO4)2 . [Answer in 3 decimal places]. 
math
Find the solution of the given system by the method of addition that was used in Examples 4 and 5. If there is no solution or infinitely many solutions, state so. Put the value for x in the blank. 2x  3y = 1; x + 2y = 4 
chemistry
50 mL of a 2.50 M solution of ammonium phosphate is added to 100mL of a 1.50 M solution of calcium nitrate. At the end of the reaction 11.2 grams of precipitate produced. What is the percent yield 
Chem
A 0.2181 g sample of KHP required 17.29 mL of sodium hydroxide solution to reach the phenolphthalein end point. Calculate the molarity(M) of the NaOH solution. 
General Chemistry
Titration between iodine and thiosulphate. Why starch solution has to be added when the solution just turned pale yellow, but not at the beginning of reaction? 
CHEM
What is the molarity of a calcium sulfate solution prepared by adding 27.89g of CaSo4 to sufficient water to make a final solution volume of 1.00L? 
CHEM
What is the molarity of potassium iodide solution prepared by adding 5.810g of KI to sufficient water to make a final solution volume of 250.0mL? 
Chemistry
Indicate the concentration of each ion present in the solution formed by mixing the following. Assume that the volumes are additive: 3.60 g of KCl in 76.5 mL of 0.274 M CaCl2 solution [K+] = [Cl] = 
chemistry
What is the molarity (moles per liter) of an aqueous solution that is prepared by dissolving 5.58g NaOH (MW=40) in enough water to make 250mL of solution? 
Chemistry
You have 500 mL of a 5.0 M solution of nitric acid HNO3 (63.01 g / mol) dissolved in water. How many grams of nitrogen does the solution contain? 
Chemistry
A student has 600.0 mL of a 0.30M solution of HNO3. How much water must she add in order to make it a 0.15 M solution? Be careful how this question is answered. 
Chemistry
Calculate the pH of a solution prepared by diluting 0.0015L of a 0.100 mol/L nitric acid solution with 0.5L of water. *C1×V1=C2×V2 C2=0.3MOL/L Do we use this concentration to find the pH 
Chemistry
What is the molarity of an HNO3 solution if 24.1mL of a 0.250M Ba(OH)2 solution is needed to titrate a 15.0mL sample of the acid? Can you tell me the process to finding this answer? 
chemistry
what volume of a 0.247 M perchloric acid solution is required to neutralize 23.8 mL of a 0.156 M calcium hydroxide solution? _titration problem of acids/bases 
chemistry
a 12ml sample of 0.4m silver nitrate solution is mixed with 8 ml of 0.8m sodium chloride solution. determine the identity of precipitate and the number of grams produced. 
chem21
A potassium nitrate solution is prepared by dissolving 2.8 g of KNO3 in 27 mL of water. What is the concentration of this solution in units of grams of solute per 100 mL of solvent? 
chemistry12_20162
14.0 grams of potassium hydroxide was dissolved to form 100 centimetre cubeof an aqueous solution. What was the concentration of this solution in mol/decimetre cube. 
Chemistry
A current of 10 amps passes for an hour through a solution of sodium chloride with a volume of 1L by poles of pt,calculate the pH of the solution after the electrolysis is finished. 
science
Urea forms a ideal solution in water. Determine the vapour pressure in an aqua solution containing 10 percent bymass at 40degree Celsius 
Chemistry
85ml of 0.1M h2so4 solution is titrated against 0.1N koh solution . Calculate the concentration of salt formed when the acid is one fourth neutralized. 
math
(1) if the second and fourth term of a G.P are 8 and 32 respectively,what is the first term? (i need a practical solution please.) (2)the eleventh term of an A.P is 25 and its term is 3 find common difference? (also need practical solution.) (3)given the sequence 0.04 to 25,... 
math solution
how many solution do this problem have? 3x(4x5)(3x+7)(x6)=0 
Chemistry
The PH of an aqueous solution of NaCN is 10.38. What is [CN] in this solution? 
math
x=9 is a solution of the inequality x3 is less than 7 but x= 10 is not a solution 
Chemistry
If the pOH of a solution is determined to be 5, what is the pH of the solution? 
algebra
The solution to this i believe is no solution need help. 2x+2>2x3 
Chemistry
If the pH of a Ca(OH)2 solution is measured as 9.0, what is the concentration of the Ca(OH)2 solution? 1 × 105 M 1 × 109 M 1 × 108 M 1 × 106 M 
Solution Set
Find the solution of x2>8 The answer is {1,4} how? 
Chemistry
If 0.45 M of ammonia solution has a pH of 9.20, what is the H+ concentration of the solution? 
chemistry
what is diluted solution and concentrated solution? 
Math
What are the solution of the system? y=x^2+3x4 y=3x+2 A (3,6) and (2,4) B(3,4) and (2,6) C (3,4) and (2,2) D no solution I think it is D 
Chemistry
A saturated solution is made by dissolving 0.252 g of a polypeptide (a substance formed by joining together in a chainlike fashion some number of amino acids) in water to give 1.92 L of solution. The solution has an osmotic pressure of 3.69 torr at 25 °C. What is the ... 
Science
Hello :) my name is Deqa, i was wondering if anyone knew the affects of a state of a substance on the reaction so generally speaking does it matter if a solid is dissolved in a solution or is it faster for a solution be added to another solution basically im wondering if the ... 
Chemistry
Iodine clock reaction If the thiosulfate ion solution was omitted what would appear in the solution? I know that once the thiosulfate ion is responsible and exhaubated the reaction rate stops and iodine is presented in the color blue. In that case, if thiosulfate ion solution ... 
Math
1. what is the solution o 204  (36)? A 240** B  240 C 168 D 168 2. what is the solution of 87 + (396)? A 183 B 183 ** C 9 D 9 3. Evaluate: 12 x 3 =? A 36 B 36** C 4 D 4 4. Evaluate: 20 ÷ 10 =? A 200 B 200 C 2 **8 D 2 5. Select all the problems that have a ... 
math
Is it possible to mix a 10% sugar solution with a 20% sugar solution to get a 30% sugar solution? 
math
when we mix a 10% acid solution with a 14% acid solution, we can obtain a solution that is 24% acid 
Chemistry
Under an O2(g) pressure of 1.00 atm , 28.31mL of O2 (g) dissolves in 1.00L H2O at 298K. What will be the molarity of O2 in the saturated solution at 298K when the pressure is 3.86atm ? (Assume that the solution volume remains at 1.00L .) I used PV=nRT and found moles of solute... 
Chemistry
Under an O2(g) pressure of 1.00 atm , 28.31mL of O2 (g) dissolves in 1.00L H2O at 298K. What will be the molarity of O2 in the saturated solution at 298K when the pressure is 3.86atm ? (Assume that the solution volume remains at 1.00L .) I used PV=nRT and found moles of solute... 
Chemistry
The spectrophometer was used to measure the absorbance of each of a series of [FeSa]+ solutions. A standard curve was construnceted by plotting the absorbance vs. concentration (M). The slope and yintercept were found to be 1496 M1 and .003, respectively. An aspirin sample ... 
Chemistry
Calculate the mass of sodium chloride (NaCl) produced when 5.50 moles of solid sodium reacts in excess chlorine gas. (Hint: Start by writing a balanced chemical equation) Please help me understand HOW to solve this problem. 
chemistry
About how much should the boiling point of pure water differ from .5m 1m and 1.5m aqueous solutions of NaCl and same molal solutions of CaCl2 Trying to check experimental data from van't hoff factor lab 
CHEM
Help on part "c": The forensic technician at a crime scene has just prepared a luminol stock solution by adding 19.0g of luminol into a total volume of 75.0mL of H2O. a)What is the molarity of the stock solution of luminol? anwer I got: molarity of luminol solution = 1.43M b)... 
CHEM
Help on part "c": The forensic technician at a crime scene has just prepared a luminol stock solution by adding 19.0g of luminol into a total volume of 75.0mL of H2O. a)What is the molarity of the stock solution of luminol? answer I got: molarity of luminol solution = 1.43M b)... 
Chemistry
Indicate how each of the following would affect the value of the absorbance (too high, too low, or not effect) of the indicated solution. I really need help. I do not understand these questions! This is from a chemistry activity to determine the unknown concentration of an ... 
Chemistry
a solution of HCL is approximately 0.1M and has to be standardized . 1.234g Na2CO3 are dissolved to make 100ml of solution. 20mL of this solution are titrated with the HCL solution, requiring 31.3mL for the second equivalence point. what is the exact concentration of the HCL ... 
Chemistry
1. An aqueous solution contains 0.154 M ascorbic acid (H2C6H6O6) and 0.196 M hydrobromic acid. Calculate the ascorbate (C6H6O62) ion concentration in this solution. Can you explain how to do this please? thank you. Also if you can is number 2 missing information or am I ... 
Math
What volume, in ml, of a 60% of HCl acid solution must be added to 100 ml of a 30% HCl solution to make a 36% HCl solution. We need 2 alegabreic (?) equations. The first I can get is: 0.36x  0.60y = 100ml (this is probably wrong)? Blah. I can't get the other one. . VolHCL*.... 
Chemistry (reaction with amine)
Phenol dissolved into sodium hydroxide solution to give another solution A. What would be formed when A reacted with phenylamine/nitrous acid mixture , butylamine/nitrous acid mixture and ammonia/ nitrous acid respectively ? The resulting solution were brown , red and ...