a density of 1.0 M solution of NaCL
29,738 results, page 58

Chemistry
Describe What Happens When Aqueous Nh4 Is Slowly Poured Into A Solution Of Znno3 Until There Is Excess Nh3 Solution 
Chemistry
Which one of these properties is directly proportional to molality and why? A) Electrical conductance B) Heat of solution C) Equilibrium of solution D) Vapour pressure Thanks 
Chemistry
what is the molarity of a solution prepared by dissolving 10.60g of Na2CO3 in enough distilled water to obtain 250.0ml of solution 
physics
A thin rectangular plate of uniform area density σ1 = 1.00 kg/m2 has a length a = 0.500 m and a width b = 0.210 m. The lower left corner is placed at the origin, (x, y) = (0, 0). A circular hole of radius r = 0.040 m with center at (x, y) = (0.057 m, 0.057 m) is cut in ... 
Physics
A thin rectangular plate of uniform area density σ1 = 1.01 kg/m2 has a length a = 0.580 m and a width b = 0.240 m. The lower left corner is placed at the origin, (x, y) = (0, 0). A circular hole of radius r = 0.046 m with center at (x, y) = (0.066 m, 0.066 m) is cut in ... 
Chemistry
Calculate the radius of a vanadium atom, given that V has a BCC crystal structure, a density of 5.96 g/cm3, and an atomic weight of 50.9 g/mol. I used this equation: density = (2)*(atomic weight) / (volume of unit cell)*(Avagodro's #) rearranged to find the volume of the unit ... 
Chemistry
Calculate the radius of a vanadium atom, given that V has a BCC crystal structure, a density of 5.96 g/cm3, and an atomic weight of 50.9 g/mol. I used this equation: density = (2)*(atomic weight) / (volume of unit cell)*(Avagodro's #) rearranged to find the volume of the unit ... 
Chemistry 12
4. a. Using Le Chatelier's principle, what effect will an increase of temperature have on the following system? H2O(l) + 57 kJ ↔ H+(aq) + OH(aq) b. What is the expression for the constant for this reaction? c. What effect will an increase in temperature have on the ... 
chem
Describe in detail by words how to prepare 200ml of .150M HCl from a 1.00 M HCl stock solution? Need help with this please? i used C1V1=C2V2 and got volume 2 = 33L or 0.33mL. to prepare the solution i need to weigh 1 gram of HCL (from 1.00M HCl stock solution)lets say i put it... 
Chem=continued
I'm currently working on a lab in which I have to make the solution boil at 245 degrees F. The solution will be a mix of ethylene glycol and I have to caluculate the volumes of water and solute needed to make the solution. here's my work so far. X= mL C2H4(OH)2 175mLX=mL H20 ... 
Physics
A 10cm times 10cm times 10cm wood block with a density of 700kg/m^{3} floats in water. What is the distance from the top of the block to the water if the water is fresh? weight= density*volume*g weight=700*(10^3)*9.81 weight=3418.877985 weight=densitywater*g*10cm*10cm*depth ... 
Chemistry
Equal volumes of 1 M BaCl2 and 1 M NaSO4 are mixed. What effect will the addition of more Na2SO4 solution have on the concentration of Ba^2+ remaining in solution? *No effect *increase the concentration of Ba^2+ ions *Decreases the concentration of Ba^2+ *Ba^2+ will remain the... 
chemistry
200cm^3 of 1.0 mol dm^3 sulphuric acid,H2SO4 is poured into a 250 cm^3 volumetric flask.Distilled water is then added to make 250 cm^3 of solution. (a)What is the molarity of the diluted acid solution? (b)What is the volume of 1.6 mol dm^3 sodium hydroxide,NaOH solution ... 
Chemistry
A technician mixes a solution containing silver nitrate with a solution containing sodium chromate. 2.89 g of precipitate is produced (assume silver chromate). Calculate the mass of silver nitrate present in the first solution. Make sure you have the correct number of ... 
Chemistry
Suppose you have two 100 graduated cylinders. In each cylinder there is 44.0 of water. You also have two cubes: One is lead, and the other is aluminum. Each cube measures 1.5 on each side. After you carefully lower each cube into the water of its own cylinder, what will the ... 
physics
the near earth asteroid Rendezvous (NEAR), after travelling 2.1 billion km, is meant to orbit the asteroid Eros at a height of about 15 km from the asteroidal center. Eros is roughly boxshaped, with dimensions 40km x 6km x 6km. Assume eros has a density (mass/ volume) of ... 
Math
1. Which number is a solution of the inequality? 10.6<b A)18 B)9 C)7 D)14*** 2. Which number is a solution of the inequality? y+2>8 A)5 B)6 C)6*** D)7 3. Which number is a solution of the inequality? 12 < y ( 8  y ) A. 0 B. 1 C. 2 D. 3*** 4. If N is the set of ... 
Physical Chemistry
A total charge of 97.4 kC passes through an electrolytic cell. Determine the quantity of substance produced in each of the following cases. (a) the mass (in grams) of silver metal from a silver nitrate solution ?g (b) the volume (in liters at 273 K and 1.00 atm) of chlorine ... 
Science
This has already been posted, however the provided answer does not make sense. Anyone have additional insight for this one? An excess of aluminum metal is added to 200.0 mL of 0.025 M solution of CuCl2, reducing the Cu+2 ions to metallic Cu. If the temperature of the solution ... 
chemistry
explain why the pure solvent shows a level horizontal curve as solidification occurs, but the curve for the solution slopes downward slightly. The solvent is BHT and the added particles are an unknown compound. My reasoning is that it happens because the added particles cause ... 
CHEMISTRY
A concentration cell is constructed of two hydrogen electrodes. The pressure of H2 is 1.00 atm in each hydrogen electrode. One of the electrodes is immersed in a solution with [H+] = 1.0 M and the other in a solution with 0.62 M NH3. What will be the value of Ecell? (Hint: ... 
Chemistry
1)A solution prepared by adding 0.400 mol of acetic acid (pKa = 4.74) and 0.400 mol of sodium acetate to 100.0 mL of water. The pH of this buffer solution is initially 4.74. Predict the final pH when 55.0 mL of 1.10 M NaOH is added to solution 2) A solution prepared by adding ... 
Physics
Suppose you are drifting on a lake in a boat that measures 1 m high, 1 m wide, and 3 m long. The water level reaches halfway up the boat. 1. What is the volume of water that is displaced by the boat? (density of water = 1000 kg/m^3 or 1.00 g/cm^3). 2. What is the mass of the ... 
Chemistry
If I have to make a solution with sodium bicarbonate (baking soda) how do i find the molarity and how do i correctly make the solution??? i.e. how do i prepare a solution of sodium bicarbonate with a molarity of 0.01? 
Chemistry (volume)
The molarity of a sodium hydroxide solution is 0.2 M. The molar mass of NaOH is 40 g/mol. If 20 g of sodium hydroxide (NaOH) is dissolved in water in this solution, what is the volume of the solution? 
Chemistry
I am designing a procedure for a lab where I have to use indicators to create an acidbase table from 6 solutions. I am just wondering...if I put a drop of indicator into a solution, do I have to dispose of it and obtain new solution before putting in another type of indicator... 
Differential Equations (Another) Cont.
For the following initial value problem: dy/dt=1/((y+1)(t2)) a)Find a formula for the solution. b) State the domain of definition of the solution. c) Describe what happens to the solution as it approaches the limit of its domain of definition. Why can't the solution be ... 
grade 9 science
a student wants to estimate the population size and density of birch trees in a woodlot measuring 100 m by 100 m. On a diagram of the woodlot, she splits the area into a 10 by 10 grid and randomly selects 10 sample quadrants  (0,0), (1,4), (2,6), (3,9), (4,3), (5,5), (6,1), (... 
Chemistry
A sample of 0.0020 mole of HCl is sissolved in water t omake a 2000ml solution. Calculate the molarity of the HCl solution, the (H30+) and the pH. For a strong acide such as HCl the (h30+) is the same as the molarity of the HCl solution. HCl +H20 Balanced equation H30+ +Cl 
Chemistry
how many moles of Na2C2O4 are there in 25.00 mL of a .7654 M solution of sodium oxalate? How many moles of KMn)4 are required to reach with the moles of Na2C2O4 in the last problem? and also, if the KmnO4 of the last problem is in 30.30mL of solution what is the molarity (M) ... 
biochemistry
The pH of 0.02M solution of a weak acid was measured at 7.6. What is the [OH] in this solution? B) The Ka for benzoic acid is 6.4 x 105M. 150 ml of 0.1 M NaOH is added to 200 ml of 0.1 M benzoic acid, and water is added to give a final volume of 1 L. What is the pH of the ... 
Chemistry
100 ml of 15 g/L silver nitrate reacts with an unknown concentration solution of copper (ll) chloride. the reaction for me only 2 grams of silver (l) chloride. If 75 mL of the copper (ll) chloride solution was mixed in, what is the initial concentration of the solution? 
Chemistry
I have to calculate the heat capacity of a coffee cup calorimeter, but I'm not sure how. I have NaCl and NaOH, they both start at the same temperature, and I have the mass of the solutions used. I'd appreciate the help! 
Algebra
How do you know if a value is a solution for an inequality? how is this different from determining if a value is a solution to an equation?, write an inequality and provide a value that may or may not be a solution to the inequality 
Chemistry
You are a lab technician and must create 250 ml of a 17% salt solution. You have available three stock solutions. You have a one liter container of a 5% salt, a 500 ml container of a 28% salt solution, and a 400 ml container of a 40% salt solution. Discuss and explain the ... 
chemistry
Record measured absorbance for each tube in following table. Complete the table by calculating the [ Fe(SCN2+)]eq and [Fe3+]initial and [HSCN]initial Data: Volume of 2.00 x 103 M Fe(NO3)3 solution, mL 1)5.00, 2) 5.00, 3) 5.00 4) 5.00 5) 5.00 Volume of 2.00 x 103 M HSCN ... 
chemistry
Record measured absorbance for each tube in following table. Complete the table by calculating the [ Fe(SCN2+)]eq and [Fe3+]initial and [HSCN]initial Data: Volume of 2.00 x 103 M Fe(NO3)3 solution, mL 1)5.00, 2) 5.00, 3) 5.00 4) 5.00 5) 5.00 Volume of 2.00 x 103 M HSCN ... 
chemistry
You weigh out an antacid tablet and determine the mass to be 1.1990 g. After taking a 0.2455 g sample of the antacid tablet, you dissolve it in 25.00 mL of a 0.1006 M solution of hydrochloric acid in a 250.0 mL Erlenmeyer flask. After heating the solution to get rid of carbon ... 
science 2
6. When aqueous solutions of table salt and silver nitrate are mixed, a white solid forms. This solid is ____. (1 point)soluble a precipitate an alloy a solute 7. Stainless steel is an example of a ____ solution. (1 point)liquidsolid solidliquid solidsolid gassolid 8. ... 
Physics
A point charge is placed at the center of a net uncharged spherical conducting shell of inner radius 2.5 cm and outer radius 4.0 cm. As a result, the outer surface of the shell acquires a surface charge density σ = 71nC/cm2. Find (a) the value of the point charge, and (b... 
Math
What are Fractions? Numbers equal to one integer divided by another integer. Integers are whole numbers, like 1, 2, 3 etc. Fractions are numbers like 2/3. These numbers are solutions of equations that don't always have a solution in terms of integers. The equation 2x=4 has the... 
chemistry
15. On October 21, 1982, the Bureau if the Mint changed the composition of pennies. Instead of an alloy of 95% Cu and 5% Zn by mass, a core of 99.2 Zn and 0.8% Cu with a thin shell of copper was adopted. The overall composition of the new penny was 97.6% Zn and 2.4% Cu by mass... 
Mathxxx!!!
1. How many solutions does the equation have? 4x+3=2(2x+9) a.one solution b.no solution c. infinite number of solutions d. impossible to determine 2. How many solutions does the equation have? 4x+19=96x a.one solution b.no solution c. infinite number of solutions d. ... 
chemistry
a 205 mg sample of diprotic acid is dissolved in enough water to make 250 ml of solution. The pH of this solution is 2.15. A saturated solution of calcium hyrdoxide (Ksp=1.3*10^6) is prepared by adding excess calcium hydroxide to water and then removing the undissovled solid ... 
chemistry
1(a) when 25.0ml of 0.500 mol.dm3 H2SO4(AQ) SOLUTION IS added to 0.025dm3 of 1.00 moldm3 KOH SOLUTION , THE TEMPERATURE OF THE REACTION MIXTURE RISES FROM 23.50 CELCIUS TO 30.17 CELCIUS . THE SPECIFIC HEAT CAPACITY AND DENSITY OF WATER 4.20j.g.celcius and 1.00 g.cm. the ... 
chemistry
Hydrochloric acid solution reacts with zinc according to the following equation: 2H3O + Zn > Zn^2+ + H2 +2H2O 100ml of hydrochloric acid solution Ca=0.5mol/l must be prepared from C=5mol/l hydrochloric solution. 1) Specify the glassware needed for this preparation . At ... 
chemistry
I asked this before, but got no response. A) If you make up a solution of 250 mL of 0.1 M TRIS in the acid form, what will be the pH? B) If you add 2 mL of 1 M NaOH to the solution in part A, what will be the pH? Thanks. 
chemistry
write a balanced equation for the reaction that occurs when an aquesous solution of iron(II) chloride is mixed with an aqueous solution of potassium hydroxide 
maths
A solution of acid was found to have a pH of 1.50. What is the hydrogen ion concentration of the solution? (Give your answer in scientific notation to 3 significant figures.) 
chemistry
How many milliliters of a 15.0%, by mass solution of KOH(aq) ( d= 1.14g/mL ) are required to produce 27.0 L of a solution with pH = 11.70? I'm really not sure how to do this, it's from Acids & Bases chapter. Any help is appreciated, thanks. (: 
Chemistry
Please help me! Thankyou! Calculate the concentration, in moles per liter, of a fertilizer solution if 500.0 mL of the solution contains 1.84 g of copper sulphate, CuSO4. 
chemistry
You are asked to prepare 150.0 mL of 3.15×10−2 M AgNO3. 2.) An aqueous solution is 6.40% methanol CH3OH by mass, with d = 0.988 g/mL} What is the molarity of CH3OHOH} in this solution? 
chemistry
When excess solid Mg(OH)2 is shaken with 1.00 L of 1.2 M NH4Cl solution, the resulting saturated solution has pH = 9.30. Calculate the Ksp of Mg(OH)2 I am not sure where to even begin on this problem. 
chemistry
Potassium bromide has a solubility of 80g/100ml of H20 at 50º C. A saturated solution would be equivalent to a ____________molar solution? 
Chemistry
If a 6.00M solution of sodium hydroxide occupies 520 mL of space how many grams of NaOH is dissolved in the solution? (Remember M = moles/L). And the work. 
chemistry
What would be the resulting molarity of a solution made by dissolving 21.9 grams of KCl in enough water to make an 869milliliter solution? 
Chemistry
You know the solution forms a precipitate when? (A) when it changes color (B) when you can’t see through it (C) because it bubbles (D) you have stirred it for more than 5 minutes (E) the solution thickens 
Chem
What would be the resulting molarity of a solution made by dissolving 21.9 grams of KCl in enough water to make an 869milliliter solution? 
9th grade science
A strong acid, HBr, has been dissolved into a beaker of water. If the solution is known to be 0.000 001 M, what is the pH solution? 
Chemistry
Explain exactly how you would make 1 liter of a .10 M acetic acid solution using vinegar from the lab as the stock solution to be diluter. 
Chemistry
An aqueous solution of an unknown compound boils at 101.00 degrees Celsius (760 torr). What is the molality, and freezing point of this solution? 
Chemistry
A nitric acid solution is found to have a pH of 2.70. Determine [H3O+],[OH], and the number of moles of HNO3 required to make 5.50L of the solution. 
Chemistry
When 1 mol of gaseous hydrogen chloride is dissolved in enough water to make 1 L of solution, approximately how many HCl molecules remain in the solution? 
Chem 121
A solution is made by dissolving 0.35 mole of LiI in enough water to give a final volume of 260.0 mL. What is the molarity of the solution? 
chemistry
If 0.694 grams of pure KHP are needed to exactly neutralize 30.5 mL of a calcium hydroxide solution, what is the concentration (in molarity) of the base solution? 
college general chem
If 15.0 of is dissolved in enough water to form 270 of solution, what is the molarity of the solution? How many milliliters of 4.45×10−2 contain 4.05 of solute 
chemistry
How many moles of sodium bicarbonate are contained in 1mL of a saturated solution of NaHCO3 (approximately 1g of solute is dissolved per 9mL solution)? 
Chemistry
How many milliliters of 0.201 M Ba(OH)2 solution are needed to completely neutralize 12.8 mL of 0.369 M HNO3 solution? The reaction is Ba(OH)2(aq) + 2HNO3(aq) → Ba(NO3)2(aq) + 2H2O(l) 
Chemistry
What will be the concentration if 52 milliters of a solution that is 12 parts per million in sodium chloride is diluted with enough water to make 97 millilters of solution? 
AP CHEMISTRY
Calculate [OH] and pH for the following strong base solution; a solution formed by mixing 10.0 mL of 0.011 M Ba(OH)2 with 28.0 mL of 7.4 103 M NaOH working and answer would be appreciated 
ChemB
CALCULATE PH OF THE SOLUTION THAT RESULTS FROM EACH SOLUTION A) 150.0mL OF 0.25M HF WITH 225.0 mL OF 0.30M NaF Help please, these buffer questions are confusing. 
Algebra
Solve using the elimination method.Show work.If the system has no solution or an infinite number of solution state ths...5x+4y=16,15x+2y=58 
Intermediate Algebra
Solve using the elimination method.Show work.If system has no solution state this or infinite solution 8x+10y=34 16x5y=43 
Chemistry
A 12 mL sample of 0.4 M silver nitrate solution is mixed with 8 mL of 0.8 M sodium chloride solution. Determine the identity of precipitate and the number of grams produced. 
Chemistry
Write the net ionic equation for the reaction that takes place between a solution of magnesium chloride and a solution of sodium hydroxide. 
chemistry 1046
Solve an equilibrium problem (using an ICE table) to calculate the pH of each solution. a solution that is 0.266 M in CH3NH2 and 0.134 M in CH3NH3Br. Kb = 4.4e4 
Chemistry
To what volume should you dilute 43.5mL of a 4.20M KI solution so that 24.0mL of the diluted solution contains 2.80g of KI? Please if you can explain it to me I am so confused. 
Chemistry
254 g of copper sulphate, CuSO4 is dissolved in water to produce 650 ml of solution. Determines the degree of concentration of the solution in mol / L. 
Chemistry
calculate the molarity of a solution made by dissolving 0.750 grams of Na2SO4 in enough water to form exactly 850 mL of solution. 
chemistry
To clean a clogged drain, 26g of sodium hydroxide is added to water to make 150ml of solution. What are the pH and pOH values for the solution? 
chemistery
A student dissolves 196 g of H3PO4 (Molar mass = 98 g) in enough water to make one liter of solution. The molarity of the solution is ? 
Chemistry
You have 475 mL of an 0.47 M acetic acid solution. What volume (V) of 1.10 M NaOH solution must you add in order to prepare an acetate buffer of pH = 5.00? 
pharm chemdilution
prepare a 50ml of potassium permanganate solution such that 10ml diluted to 250ml will produce a 1 in 2000 solution 
pharm chemdilution
prepare a 50ml of potassium permanganate solution such that 10ml diluted to 250ml will produce a 1 in 2000 solution 
Chemistry
use the HendesonHasselbalch equatio. To calculator the pH of a solution at is A) 0.15 M on C5H5N and 0.10M in C5H5NHCl. Kb:1.7x10^9 B) 15.0 g of HF and 25.0g of NaFin 125 ml of a solution. Ka 3.5x10^4 
Chemistry
(a)What is the pH of a solution made by combining 200 mL of 0.1 M Lactic Acid with 300 mL of 0.075 M sodium lactate? (b) If 20 mL of 0.4 M HCl is added to the solution from (a) what is the resulting pH? 
chemistry
a solution of oh negative ions is added to a beaker of pure water 25 degrees celcius to a final concentration of 137 nM calculate the ph of the solution 
chemistry
a solution of oh negative ions is added to a beaker of pure water 25 degrees celcius to a final concentration of 137 nM calculate the ph of the solution 
solution making/ chemistry/biotech
how much of a .2M solution can you make with 340 g of calcium carbonate ( MW=100.0869) Do I multiply 340g by 1mole/MW 
Chemistry
In a routine laboratory analysis, a solution of sodium chromate with a chromium concentration of 175.0 ppm is required. Calculate the molarity of this solution. 
chemistry
A particular weak acid (HA) with a Ka of 2.0e5 is 75% titrated with a strong base to produce a buffer solution. What is the pH of this final solution? Show all work. 
chemistry
Hydrochloric acid(75.0 ml of 0.250 M) is added to 225.0 ml of 0.0550 M Barium hydroxide solution. What is the concentration of the excess H+ or OH ions left in this solution? 
GN National Public School
If one third of 100 gm of 27% of aqueous solution is taken in a beaker and 10 gm of sugar is added to it,the concentration of resulting solution is..... 
chemistry
calculate the molarity of solution cacl2 . if on the chemical analysis . it is found that 200 ml of solution contains 3 into 10 raise the power 22 cl ions 
chemistry
A current of 96.5 A is passed for 18 min between nickel electrodes in 500 mL solution of 2M Ni(NO3)2. The molarity of solution after electrolysis would be 
chemistry morality
To what volume should 1.19 ml of an 8.00 m acetic acid solution be diluted in order to obtain a final solution that is 1.50 M? show all work 
science
A student is all 32 gram of potassium nitrate in water to prepare 200 ml of solution what is the concentration of solution in terms of mass by volume 
Chemistry
a solution is prepared by adding 5g of ammonia,Nh3, and 20g of ammonium chloride, NH4Cl , to enough water to form 2.5 L of solution. What is the ph of the buffer? Kb= 1.8*10^5 
chemistry university
A 179 mL solution of a copper complex with a molecular weight of 491.9 g mol1 was made. The absorbance of the solution at 638 nm wavelength was 0.376 using a 1 cm cuvette. It is known that this copper complex has a molar absorptivity (extinction coefficient) of 324.4 M1 cm1... 
chemestry
0.63g of pb powder were disolved in excces nitrate(v) aci to forn leadnitrate solution, all the lead nitrate solution were reacted with sulphate,give the ion equationof the reaction between lead nitrate and sadium sulphate solution?determine the mass of the lead salt formed in...