a density of 1.0 M solution of NaCL
29,695 results, page 100

chemistry
How many atoms are in a drop of mercury that has a diameter of 1.0 mm? (Volume of a sphere is 4ðr3/3; density of mercury = 13.6 g/cm3) 
PHYSICS
A Solid Cube Of Steel Has Each Side 10cn Long.Find Its Mass If The Density Of Steel Is 6.5g/cm 
Chemistry 101
if an organic liquid has a density of 1.11 g/mL and has a measured volume of 500. mL, what mass of liquid is present? 
Science
Radius of an iron sphere is0.21m if density of iron is 7.80g calculate the mass 
Physics
An empty density bottle weight 20g full of water and 60g when full of liquid 
Chemistry
Compute the approximate density of methane, CH4, at 20oC and 5.00 atm. The molecular weight of methane is 16.0. 
physics
An ice cube floats with 1/9 of its volume below the surface of water, calculate the density of ice. 
Physics
Ice floats with one ninth of its volume above water. What is the relative density of ice? 
chemistry
a sample of gaseous substance at 25 degrees Celsius and 0.862atm has a density of 2.6g/l. what is the molecular weight of the substance? 
chemistry
A mixture of H2(g) and N2(g) has a density of 0.221 g·L−1 at 301 K and 501 torr. What is the mole fraction composition of the mixture? 
Chemistry
Hcl is given 38percentage by mass with density 1.1 0 gml what is the molarity and molarity give answer 
physics
How do I calculate density of a string with what I have? The string mass is 12g and length is305.4cm 
Chemistry
A hydrogen has an empirical formula CH and a vapour density of 39.Determine its molecular formula,show workings. 
chem
In a solution at constant H+ concentration, iodide ions react with hydrogen peroxide to produce iodine. H+ + I + 1/2H2O2 > 1/2I2(aq) + H2O The reaction rate can be followed by monitoring the appearance of I2. The following data were obtained: [I]____[H2O2]____Initial ... 
Chemistry
The density of water is 1.0 g/mL. How many deciliters of water will fill a 0.5L bottle? 
chemistry
A bottle of HCL is 14.0M and has a density of 1.08 grams/mL. What is the molality of the HCL? 
science
is this true? the maximum density of water is maximum at 0 degree c 
Science
A liter of water has a mass of 1000 g. What is the density of water? 
physical science
the solid has a mass of 180g. what is the density of the solid? 
chemistry
a known density for a liquid is 1.5 g/ml how many ml will 500 grams of this liquid occupy 
Science
True or False? Density is another property of matter True??? 
Chemistry
3. How many molecules are in 1 L of water (assume that the density of water is 1g/ml)? (5 marks) 
chemistry
The density of iron is 7.87 . What is the mass of a l* 4.00cm * 1.00 cm block of iron? 
college physics
what is the mass of an 80 ml. acetone when the density of the acetone is 0.792 g/ml.? 
chemistry
A gas has a density of 5.56 g/l. What volume in mL would a 4.17 g of this gas occupy? 
Chem
22.8 kg of a metal has a density of 8.3g/mL. Calculate the volume of the metal sample? 
chemistry
the density of water is 1gm/ml. what is the molarity of 1 drop of water? 
chemistry
The density of brass is 8,600 kg/m3 or 8.6 g/mL. You have 2 kg of brass. What is the volume? 
chemisty
What volume of silver will weigh exactly 25.0g? The density of silver is 10.5g/ml. 
Science
Why is 100g of water and 1000g of water the same density? 
chemistry
At 20 °C, chloroform (CHCl3) has a density of 1.489 g/mL. What is the mass of 7.52 mL of chloroform at 20°C? 
Chemistry
What is the mass in kg of 20.0 L of diesel fuel? Assume the fuel has a density of 0.85 g/mL. 
physics
When a 2.9 kg object is suspended in water, it "masses" 1.5 kg. What is the density of the object? 
chemistry
a 2.55g sample of an unknown has a volume of 3.73 cm. what is the density of the unknown 
chemistry
a 2.55g sample of an unknown has a volume of 3.73 cm. what is the density of the unknown 
chemistry
if a gallon of antifreeze weighs 8.75 pounds. what is the density of the antifreeze in g/ml? 
Science
Density is given in ____. a.Pa/cm3 b.N/m2 c.g/s2 d.g/cm3 I cant rremember, c? 
Physics
A block is in the shape of a cube with side 10 cm. What is the density of the block? 
Chemistry
The density of silver is 10.5 g/mL, so what is the mass of a 16.3cm^3 piece of silver? 
Science
density of wood that is 20 cm below water and 60 cm above water 
Chemistry
How much does 1.0 ft^3 of mercury weigh given the density of mercury is 13.6 g/ml? 
Physics
5liters of alcohol has a mass of 4kg.the density of alcohol? 
biology
if a rock had a mass of 9.00g, what is the density of the rock? 
chem
how do u set up with problem How would you prepare 165 mL of a 0.0317 m solution of benzoic acid (C7H6O2) in chloroform (CHCl3)? Just follow the definition of molarity. M = mols per L of solution I am assuming the m is molarity. But if it is molality, then molality is mols per... 
chemistry
a large 1.5 x 10^6liter tank contains water polluted with lead (II) nitrate at a molarity concentraion of 2.5 x 10^6 M to the tank, you add 59.7 liters of 0.075 M potasium chloride solution. did you add enough potassium chloride to remove all the lead(II) ions out of the ... 
Math 7th Grade
A car cost $65 per day to rent plus $.35 per mile. Joe rents car for 1 day and drives 115 miles. what is the equation and the solution. The solution is pretty simple $65 + .35x115 = 105.25 I can't figure out the equation. 
Chemistry
Given the following equation: 2CH3CO2H + Ca(OH)2 > Ca(CH3CO2)2 +H2O If you start with 30 ml of a 5% solution of acetic acid, how much of a .1M Ca(OH)2 solution would it take to completely neutralize the acid? I'm not quite sure how to start? Should I convert 30 ml to ... 
Chemistry
(Ksp= 5.0*10^13) 1) Calculate the molar solubility of AgBr in 3.0×10^−2 M AgNO3 solution. 2) calculate the molar solubility of AgBr in 0.10 M NaBr solution. I tried solving using this the quadratic formula, but it didn't work. I started with these equations and then ... 
Chem
Using the standardized NaOH solution, the student weighs out 0.2550g of a solid unknown acid and finds that 28.50mL of the NaOH solution is required to reach an end point with the acid. Calculate the molar mass of the unknown acid, assuming the acid is diprotic. 
Chem
Using the standardized NaOH solution, the student weighs out 0.2550g of a solid unknown acid and finds that 28.50mL of the NaOH solution is required to reach an end point with the acid. Calculate the molar mass of the unknown acid, assuming the acid is diprotic. 
chemistry
A sample of 10.00g of a solid unknown was dissolved in 25.00g of water. Assuming that pure water freezes at 0.0°C and the solution freezes at 5.58°C, what is the molal concentration of the solution? What is the molar mass of the solid? Show your calculation. I got that the ... 
chemistry
suppose that you have a micro pipet which delivers 100 drops per cubic centimeter, and a solution of 5.0% by volume of oil in alcohol. if you had used 10 drops of this solution, how many cubic centimeters of pure oil would be left after evaporation of the alcohol? 
urgent chem help ( dr bob plz)
A particular household ammonia solution (d= 0.97g/mL) is 6.8% NH3 by mass. How many milliliters of this solution should be diluted with water to produce 650 mL of a solution with pH = 11.50? ============================ first i did was ph = 11.50 PH= 1411.50 = 2.5 10^2.5 = 0... 
Chemistry
What volume of 0.200M of aqueous solution of formic acid, a weak monoprotic acid (KA = 1.78x104) and 0.200M aqueous solution of NaOH would you mix to prepare a 500mL of a buffer solution of pH = 4.0. I know I need to use the HH equation, I'm just not sure what I plug in and ... 
PHYSICS TEST !!
Hi! I have a physics test and need help with a few study questions...if you know which equations to use or how to solve any of these PLEASE tell me...thankyou! 1. One cubic meter of liquid air at standard temperature and pressure is about 900 kg. When this much liquid air ... 
Algebra II
Solve: 3+2(1x) >6 or 2x+14 <=8. Graph the solution set on a number line. When I solved the equations for the first one I got x<1/2 and for the second one I got x<= 3. How do I graph the solution set for these???? 
science
an ethereal solution contains benzoic acid, 9fluorenone, and ethyl 4aminobenzoate. why would ethyl 4aminobenzoate and 9fluorenone not be extracted from this ethereal solution by aqueous base? 
Chemistry Lab
You need 123 mL of 0.245 M NaOH solution for a certain experiment, and the only solution available in the lab is 1.252 M. How many mL OF THE 1.252 M NaOH would you need? 
chem 1151
a 250.0 mL of solution contains 50.0 mL acetone and 45.0 mL ethyl alcohol and the remainder water. Calculate the % acetone, % ethyl alcohol, and water in the solution. Show calculations. 
Chemistry PLEASE
an empty 3.5 L container weighs 650 g when empty. When filled with a 3.5%, by mass, of salt solution, the total mass then is 3.375 kg. How many grams of salt are there in the solution in the container? 
chemistry
What mass of barium sulphate can be produced when 100.0 mL of a 0.100 M solution of barium chloride is mixed with 100.0 mL of a 0.100 M solution of iron (III) sulphate? Please explain! 
Algebra 1
1. What is the domain of the function {(18,34),(22,64),(94,36),(11,18),(91,45)}? 8.what is the equation of the line that includes the point (4,3) and has a slope of 2? 12.what is the solution to the following system of equations? Y=2x4 y=x 15.which function is not linear 19... 
Economics/English
How do you structure a policy essay? Like I have an economic problem (welfare) and my thesis is a solution to is. I have to write a policy/essay on my solution/problem. 
chemistry
The temperature of a dilute 0.847 M solution of NaBr was increased from 25 degrees Celcius to 40 degrees Celcius. What effect did this temperature change have on the molarity of the NaBr solution? 
chemistry
What are the consequences of using only a very dilute solution of HCl or a very concentrated solution of HCl in attempting to return the pH? in attempting to return the pH to 7? What is a better alternative? 
Chemistry
A solution is made by dissolving 26.7 g urea, a nonelectrolyte, in 301 g water. (The vapor pressure of pure water is 23.8 torr at 25°C and 71.9 torr at 45°C.) Calculate the vapor pressure of this solution at 25°C. 
Math
Write an equation that involves multiplication, contains a variable, and has a solution of 5. Then write another equation that has the same solution and includes the same variable and numbers but use divison. 
Chemistry
Im fed up with this assignment please help The oxide formed when selenium burns in air dissolves in water to give a solution of selenious acid, H2SeO3. The solution conducts electricity, and turns blue litmus paper red. State the evidence that supports classifying H2SeO3 as an... 
Chemistry (urgent)
Hi, I have a few chemistry problems that I'm having trouble solving. I put my attempted solutions after the problems in *'s. There was one problem I had no idea how to solve. What concentration of silver chromate (Ksp = 9.0 x 1012) will dissolve to make a saturated solution ... 
Biochemistry
On preparation of a solution of protein, you attempted to dissolve the substance in water, but a suspension resulted. Dropwise adition of NaOH solution, with stirring, eliminated the suspension. Addition of acid to the original suspension had no effect. Think about how pH ... 
Chemistry (titrations)
15.00 mL of 0.01200 M EDTA were used to titrate 50 mL aliquot solution containing iron (II). How much iron (II) is present in the solution? The answer in the book is 201 ppm. I tried getting the moles of EDTA (n,EDTA = 1.8 x 10^4 mol). I think they're in 1:1 ratio, or I guess... 
Chem.
To standardize a solution of NaOH, one uses a primary standard called potassium hydrogen phthalate (KHP). It is a monoprotic acid. It has a molar mass of 204.33g/mol. Suppose you weigh out .556g of KHP and dissolve it in water. It requires 14.48 mL of NaOH to reach the ... 
biochemistry
You have purifiedLDH using affinity chromatography. Using the bradford assay you determined the total protein concentration of the column fraction to be 10 mg/ml in a final volume of 2.4 ml. You diluted some of your column fraction to 1 mg/ml using SDS Page sample loading ... 
chemistry
You have purifiedLDH using affinity chromatography. Using the bradford assay you determined the total protein concentration of the column fraction to be 10 mg/ml in a final volume of 2.4 ml. You diluted some of your column fraction to 1 mg/ml using SDS Page sample loading ... 
Biochemistry
You wish to make 3 reactions (1 ml each) with the specified amounts of protein. The remainder of each reaction consists entirely of buffer. The source of your protein is a stock solution that has a concentration of 0.5 mg/ml. What is the volume of stock solution required for ... 
Chemistry
a student uses the unduiluted glucose stock solution in a reaction and finds that the absorbance values over 90 seceonds are all 1.900. What does this result tell you abou the enzyme activity of glucose oxidase in this reaction after the 90 seconds time point? Would it be ... 
math problem
Bacteria grow in a nutrient solution at a rate proportional to the amount present. Initially, there are 250 strands of the bacteria in the solution which grows to 800 strands after seven hours. Find the time needed for the bacteria to grow to 1600 strands. 
science
solubility equillibrium is dynamic equillibrium between undissolved excess solute and solvent or aqueous solution and crystal in a saturated solution. so rate of dissolving = rate of crystalization if any more solute is added it will disrupt equillibrium and a precipitate will... 
Chemistry II
Acetone, C3H6O, is the main ingredient of nail polish remover. A solution is made up by adding 35.0mL of acetone(d=0.790g/mL) to 50.0mL of ethyl alcohol,C2H6O(d=0.798 g/mL). Assume that the volumes are additive. From this information calculate the molarity of acetone in the ... 
chemistry
an unsaturated solution is made by completely dissolving 20.0 grams of NaNO3 in 100.0 grams of water at 20.0 degrees celcius. show a corrct numerical sat up for calculating the number of moles of nano3(gramformula mass = 85.0 grams per mole) used to make this unsaturated ... 
Chemistry Lab
A 15.00 mL sample of a weak acid with Ka = 3.52x104, was titrated with 0.475 M KOH. The equivalence point was reached after addition of 19.5 mL of KOH with the phenolphthalein indicator. Determine the molar concentration of the original acid solution, then find pH and a % ... 
Physical Science
5. What reactions occurs when a solution of hydrochloric acid, HCl, is mixed with a solution of calcium hydroxide, Ca(OH)2? (A) Cl + Ca(OH) > HCa + Cl(OH)2 (B) HCl + Ca(OH)2 > H(OH)2 + CaCl (C) 2HCl + Ca(OH)2 > 2H2O + CaCl2 (D) 2HCl + Ca(OH)2 > H2Ca + 2ClOH... 
Chemistry, Buffers, pH
Hi could someone please help me in the next 5 minutes with this question: Given this data: mass of unknown acid 1.4671g Volume of NaOH used in titration 18.47mL Concentration of the NaOH used 0.2403M pH of the original acid solution 2.16 pH of the final acid solution 3.49 Show... 
Astronomy
Why do widths/strengths of spectral lines differ between supergiant stars and main sequence? Does the density of gases in the outer layers play a part? 
physics
A steel ball is tossed into the ocean and comes to rest at a depth of 2.40 km. Find its fractional change in volume, assuming the density of seawater is 1020 kg/m3. 
Physics
A ball has a diameter of 3.70 cm and average density of 0.0841 g/cm3. What force is required to hold it completely submerged under water? I need to find the magnitude in N Thank you! 
ASTRONOMYHELP!!!
IM DESPERATE!!!!!!!!!!!!! HELLLPPPPPP!!!! Can someone explain to me this asteroid article??? ?i am so confused! (google: asterioid 21 lutetia:low mass, high densityfirst link) 
Chemistry
Determine the amount (in grams) of boron that when substitutionally incorporated into 1 kg of silicon will establish a charge carrier density of 3.091×1017 carriers/cm3. 
physics
At sea level, the atmospheric pressure is 1.04×10 to the power 5 pa.Assuming g=10ms sq and density of air to be uniform and equal 2 1.3kg m cube find the height of the atmosphere. 
physics
the surface tension Y, of liquid depends on the density,P, acceleration of gravity,g, and the height, h. use the method of dimension to derive the actual relationship between these quantities 
Physics Hons
A solenoid 1metre long and radious 4cm has 1000 turns and is carrying 1Ampere current.find the magnetic flux density at the centre. 
geography
teh type of erosion mainly found on the upper course of rivers are: a.hydralic action,lateral and abrasion b.hydralic action and solution c.abrasion and solution d.hydralic action and attrition 
chemistry
A 1.2431 g alloy sample was analyzed for its copper content iodometrically. The alloy was dissolved in hot, concentrated nitric acid and prepared for analysis. The addition of excess KI(aq) solution precipitated the copper as cuprous iodide and liberated elemental iodine ... 
Solar Energy Help ASAP
John has used a solar simulator setup to measure the relation between the voltage and the current of a small photovoltaic cell (40 cm long and 40 cm wide). The measurement setup maintains the standard measurement conditions: the temperature is controlled to 25oC, the incident ... 
Chemistry
The solubility of KCLO3 at 25 degree celcius is 10.9 per 100.g of h20. question: If 15 g are addded to 100 g of water at 25 degree celcius with stirring, how much of KCLO3 will dissolve? Is the solution saturated, unsaturated, or supersaturated? please help me with this ... 
chemistry
Here are 2 questions I worked out, but need them checked. Also, can't get answer to another question correct unless question 1 is correct. Would you check the first 2 and help me with the third? 1) What is the pH of a 0.05 M solution of TRIS acid (pka = 8.3)? My answer: I used... 
Physics
A standing wave is set up in a string of variable length and tension by a vibrator of variable frequency. Both ends of the string are fixed. When the vibrator has a frequency fA, in a string of length LA and under tension TA, nA antinodes are set up in the string. (a) Write an... 
Chemistry
PART 1 >>Trial 1 Reactant Solution A 10 ml I^, 5.0 ml S2O3^2 Reactant Solution B 10 ml S2O8^2, 1 ml starch time to react = 10 seconds >>Trial 2 Reactant Solution A 10 ml I^, 5.0 ml S2O3^2 Reactant Solution B 5 ml S2O8^2, 1 ml starch time to react = 20 seconds... 
Math 3
Solve by factoring: One of the solutions to the quadratic equation x^2  13x + 30 is 3. What is the other solution? Is it:(x+3) If 3 is a solution, then the quadratic contains a factor (x3). The other factor is thus (x10), and it follows that the other root is x = 10. thanks... 
physics :thinking check please
I think that: psi= A sin kx; is a solution to Schrodinger's time independent eqn for a particle confined: a) within an infinite pot well, and b) within the walls of a finite well;but psi= B exp(kx) would only be a solution for outside the walls of a finite well. Am I close? ...