a density of 1.0 M solution of NaCL
29,471 results, page 88

chemistry
Calculate the pH values and draw the titration curve for the titration of 500 mL of 0.010 M acetic acid (pKa 4.76) with 0.010 MKOH. Calculate the pH of the solution after 490 mL of the titrant have been added. Calculate the pH of the solution after 500 mL of the titrant have ... 
chemistry
Calculate the pH values and draw the titration curve for the titration of 500 mL of 0.010 M acetic acid (pKa 4.76) with 0.010 MKOH. Calculate the pH of the solution after 490 mL of the titrant have been added. Calculate the pH of the solution after 500 mL of the titrant have ... 
Chemistry
I'm sorry here is another I do not understand. How do you find out exactly how much of a solution you would need to completely precipitate another compound in the reaction? We can precipitate out solid lead(II) iodide from an aqueous lead(II) nitrate solution by adding ... 
Chemistry...Help?
I've been trying to understand these two questions and I've reread my textbook a dozen times but I still get confused. 27, A: Which is a stronger acid  sulfuric or carbonic acid? (Answer: Sulfuric acid.) 27, B: Imagine you have two glasses. One contains a solution of ... 
Organic Chemistry
A halflife of a H2O2 solution at a certain condition is 4 weeks. You have a 100 mL of 1.00M H2O2 solution. How many moles of H2O2 will be left in the solution after the following weeks? 04 weeks after: moles 08 weeks after: moles 16 weeks after: moles 20 weeks after: moles 
chemistry
A 0.2528 g sample of a mixture containing sodium carbonate and sand requires 12.32 mL of 0.2409 M HCl(aq). Assuming that the sand does not react with the HCl(aq), what percentage of the mixture is sodium carbonate? Balanced equation: Na2CO3(s) + 2 HCl(aq) ¨ 2 NaCl(aq) + CO2... 
Inorganic Chemistry
I messed up on my titration: filled part of the burette with a supersaturated solution of KHTar(2.073g...MM=188.18amu) dissolved in 150mL diH2O, instead of the 0.051M NaOH solution. I know it wasn't more than a few mL, but I noticed a huge difference in the volume of NaOH ... 
chemistry
Polymers are high molecular weight compounds with a repeating structural unit. Polystyrene has the formula (CH CHZ) , where Z is C H and n is an integer. where n is 576 A solution of polystyrene in a solvent is prepared. Would you select H O, ethanol (CH CH OH), or toluene (C ... 
chem
A quantity of 16.13 mL of a KOH solution is needed to neutralize 0.4883 g of KHP. What is the concentration (in molarity) of the KOH solution? I don't even know where to begin with the first one. Calculate the amount of heat liberated (in kJ) from 375 g of mercury when it ... 
Molarity/molality
A 3.29 m solution of the solute H2O dissolved in the solvent acetone is available. Calculate the mass ( kg ) of the solution that must be taken to obtain 26.70 mol of H2O. m= molality I have no idea how to approach this problem, I'm not interesting in getting the answer, I ... 
maths
x^27x = 0 substitue x=7 into the equatiopn and explain why this shows that x=7 is the solution. ok so i do this: if x=7 then the equation becomes 7^249=0 7^2=49 4949=0 so x=7 is correct (is that explanation enough?) now i have to write out a complete solution to the orginal... 
chemistry
When a 3.90g sample of solid ammonium nitrate dissolves in 60.0 g of water in a coffeecup calorimeter, the temperature drops from 24.5°C to 19.3°C. Calculate DH (in kJ/mol NH4NO3) for the solution process NH4NO3(s) > NH4+(aq) + NO3(aq) Assume that the specific heat ... 
Chemistry
Air in the vicinity of a local power station contains 8.8x10^4 gm^3 SO2. What volume of 0.001moldm^3 Iodine solution would be required to react with a solution obtained from 200dm^3 of contaminated air? The equation given is SO2 + I2 + 2H2O ==> H2SO4 + 2HI Thanks! :) 
Chemistry
A protein subunit from an enzyme is part of a research study and needs to be characterized. A total of 0.135g of this subunit was dissolved in enough water to produce 2.00 mL of solution. At 28 ∘C the osmotic pressure produced by the solution was 0.138 atm. What is the ... 
chemistry
When magnesium metal and an aqueous solution of hydrochloric acid combine, they produce an aqueous solution of magnesium chloride and hydrogen gas. Using the equation, Mg (s) + 2HCl (aq) → MgCl2 (aq) + H2 (g), if 48.6 g of Mg and 150.0 g of HCl are allowed to react, ... 
chemistry step by step thank a lot
Al2(s04)3 solution of a molal concentration is present in 1 litre solution of 2.684g/cc. How many moles of bas04 would be precipitated on adding bacl2 in excess? the answer 6M Who helps me step by step for me clearly I am thankful to all tutors 
college algebra need help asap
Solve the system of equations using substitution. 2x−8y = 2 x+4y = 0 What is the solution? Select the correct choice below and fill in any answer boxes in your choice. A. m (Type an ordered pair.) B. There are infinitely many solutions. C. There is no solution. 
Chemistry!HELP
32.12mL of 10.0 mol/l potassium chromate solution is reacted with 120.0m of 2.00mol/l lead (II) nitrate solution. The balanced equation is; 2KCrO4(aq)+Pb(NO3)2(aq)==>2KNO3(aq)+Pb(CrO4)2(s) a. Determine the limiting reactant b. What is the maximum mass, in grams, of lead(II... 
SCIENCE AGAIN
My book does not have this question in it either. I tried various web sites. Maybe someone could help. Thank you "__________ is the solution to pollution" is an old axiom responsible for much of our problems in estuarine contamination. I am guessing that it possibly could be "... 
Chemistry
Hey guys! Trying to understand this problem before my Chem exam but I just can't get it down no matter how hard I try. Detailed solutions would be greatly appreciated because I'm so lost on this one. Thanks! What mass of ammonium chloride must be added to 5.00x10^2 mL of 0.10 ... 
Physic
A bar has a constant cross sectional area A. The bar is devided in 2 segments segment 1 (1/3 of the bar) and segment 2 (2/3 of the bar). Segment 1 is made of a material with mass density ρ and Young's modulus E. Segment 2 is made of a different material, with density 0,5... 
CHEMistry
A 2.50g sample of powdered zinc is added to 100.0 mL of a 2.00M aqueous solution of hydrobromic acid in a calorimeter. The total heat capacity of the calorimeter and solution is 448 J/K. The observed increase in temperature is 21.1 K at a constant pressure of one bar. Using ... 
chemistry
A 2.50g sample of powdered zinc is added to 100.0 mL of a 2.00M aqueous solution of hydrobromic acid in a calorimeter. The total heat capacity of the calorimeter and solution is 448 J/°C. The observed increase in temperature is 21.1 °C at a constant pressure of one atm. ... 
Math
Which term best describes the solution of the situation represented by the system of inequalities? (Assume that x >= 0 and y >= 0.) 3x + 4y <= 8 2x + 4y <= 6 Answer choices given are: a. alternate optimal solutions b. one optimal solution c. unbounded d. infeasible... 
science
Titanium (Ti) can be produced by the reaction of metallic sodium (Na) with titanium tetrachloride vapor (TiCl4). The byproduct of this reaction is sodium chloride (NaCl). Calculate the amount of titanium produced (in kg) when a reactor is charged with 61.0 kg of TiCl4 and 14.0... 
chemistry
Titanium (Ti) can be produced by the reaction of metallic sodium (Na) with titanium tetrachloride vapor (TiCl4). The byproduct of this reaction is sodium chloride (NaCl). Calculate the amount of titanium produced (in kg) when a reactor is charged with 61.0 kg of TiCl4 and 9.0 ... 
Chemistry
Titanium (Ti) can be produced by the reaction of metallic sodium (Na) with titanium tetrachloride vapor (TiCl4). The byproduct of this reaction is sodium chloride (NaCl). Calculate the amount of titanium produced (in kg) when a reactor is charged with 95.0 kg of TiCl4 and 10.0... 
Chemistry :(
Titanium (Ti) can be produced by the reaction of metallic sodium (Na) with titanium tetrachloride vapor (TiCl4). The byproduct of this reaction is sodium chloride (NaCl). Calculate the amount of titanium produced (in kg) when a reactor is charged with 94.0 kg of TiCl4 and 21.0... 
Science
Titanium (Ti) can be produced by the reaction of metallic sodium (Na) with titanium tetrachloride vapor (TiCl4). The byproduct of this reaction is sodium chloride (NaCl). Calculate the amount of titanium produced (in kg) when a reactor is charged with 87.0 kg of TiCl4 and 20.0... 
chemistry
Titanium (Ti) can be produced by the reaction of metallic sodium (Na) with titanium tetrachloride vapor (TiCl4). The byproduct of this reaction is sodium chloride (NaCl). Calculate the amount of titanium produced (in kg) when a reactor is charged with 87.0 kg of TiCl4 and 20.0... 
Chemistry
Titanium (Ti) can be produced by the reaction of metallic sodium (Na) with titanium tetrachloride vapor (TiCl4). The byproduct of this reaction is sodium chloride (NaCl). Calculate the amount of titanium produced (in kg) when a reactor is charged with 95.0 kg of TiCl4 and 10.0... 
Chemistry
Can an acidic solution be made less acidic by adding an acidic solution? 
5th grade science
Which is a measure of how closely particles are packed together? A.density C.solubility D.volume B.matter 
Chemistry
Calculate the molar concentration of acetic acid (CH3COOH) in a 5.00mL sample of vinegar (density is 1.00 g/mL) if it is titrated with 25.00 mL of NaOH. 
Chemistry
The density (in g/L) of CO2 at 444 torr and 6.0°C is __________. Express answer to three (thousandth) decimal places. 
college physics
Estimate the rotational kinetic energy of Earth, assuming it to be a solid sphere of uniform density. 
chemistry
How do you think the density of ethanol would change if it were warmed to 50 degrees Celsius before you did the experm\iment? 
chemistry
how could you find the mass and volume from this info Acetone (fingernailpolish remover) has a density of 0.7857 g/cm3. 
CHEM
A 60.0 sample of water is heated to its boiling point. How much heat (in ) is required to vaporize it? (Assume a density of 1.00 .) 
chemistry
Calculate the number of carbon atoms in 0.75 L of acetone (CH3COCH3). (density = 1.3 g/mL and boiling point = 48.5 degrees Celsius) 
7th grade
a rectangular block measures 2cm * 1.5cm *1cm .the mass of the object is 31.5 grams .what is its density ? 
chemistry
calculate the molecular formula of a compound with vapor density of 30 having 40% carbon, 6.67% of hydrogen and the rest is oxygen. 
science
(1) what measurements and what calculation would you need to make in order to determine the density of a rectangular wooden block? (2) 
chemistry
Molybdenum (Mo) has a density of 10.22 g/cm3 and it crystalizes into a fcc unit cell, calculate the radius of a (Mo) atom? 
physics
Calculate the density of an object with a mass of 109 grams and a volume of 123 ml. (Round your answer to 3 digits.) 
Chemistry
A 5.00L steel cylinder is filled with water vapor at 650mmHg and 100C. Calculate the density of the gas. 
Science
What is the density of an object that has a mass of 550 grams and displaces 25 mL of water? Select all that apply 22mL/g .04 mL/g 22 g/mL 22 g/cm 3 
phiisical science
Suppose an unknown substance has a melting temperature of 1,200 degrees Celsius and a density of 16.7 g/cm3. 
science/math please help
what is the density of an objects whose mass is 500 grams and displacs 250 ml of water? 
Chemistry
Given that a sample of air is made up of nitrogen, oxygen, and argon in the mole fractions 78% N2, 21% O2, and 1.0% Ar, what is the density at stp? 
Chemistry
Beginning with the ideal gas equation show how density of a vapor may be determined? I have so far: n = (PV)/(RT) d= m/V n= m/MW by rearranging i get d = P(m/MW)/RT 
chemistry 12  gases
The molecular formula for this compound (14.37% H, density of 1.13 g/L at 24 C and 743 mmHg) is C_H_ I am not sure how to use this information 
chemistry, i need helppp like a.s.a.p!!!!
What is the density of a 23.92 g object block if the dimensions: length = 10.6 mm height = 5.47 cm width = 0.0352 m 
chemistry, i need help like a.s.a.p!!!!
What is the density of a block of unknown material with a mass of 19.07 g if the dimensions are: length = 3.1 cm height = 1.9 cm width = 4.6 cm 
Physical Science
if you tear a piece of material in haft, how is the density affected? sorry i repost it, just the title 
chemistry
What pressure would be required for neon at 25 degrees C to have the same density as argon at 25 degress C and 1.00 atm? 
chemistry
What pressure would be required for neon at 25 degrees C to have the same density as argon at 25 degress C and 1.00 atm? 
chemistry
What pressure would be required for neon at 25 degrees C to have the same density as argon at 25 degress C and 1.00 atm? 
biology
Calculate the density of a solid cube that measures 5.18 cm on each side and has a mass of 197 g. Answer in units of g/cm3 
maths
a sphere wall is 20mm thick, inside diameter is 10M. What is the mass of steel if the density is 7850Kgm3? 
8th Grade Physical Science
Calculate the density of a sample of gas with a mass of 30 g and volume of 7500 cm3. 
biology
if DNA replication were conservative, what sort of bands would you expect from the CsCl density gradient centrifugation? 
multivariable calculus
Studying for a test, and saw this: Find the center of mass of the hemisphere x^2 + y^2 + z^2 = a^2; z>=0 if it has constant density. Any ideas? 
Science
Archimedes' principle states that the buoyant force on an object is equal to the density of the fluid it displaces. true? 
Physics
How much pressure is exerted on a submarine at a depth of 8.50 km in the Pacific Ocean? (density of sea water = 1.025 x 10^3 kg/m3, P0 = 1.01 x 10^5 Pa) 
chemistry
describe how you can prepare 500cm of 0.1 of hydrochloric acid from commercial Hcl of density 118g/cm and the percentage by mass 37% 
Chemistry
Dividing 0.32g of sulfur by its density of 2.07g/cm^3 results in an answer with three significant figures? Am I right? 
chemistry
a certain hydrocarbon has the analysis C=85.84% and H=14.16%. the density of its vapour is 2.50g/L at STP. find the empirical and molecular formula. 
Physics
What is the pressure at a depth of 80 m in the ocean? The density of seawater is 1. 03 × 10 3kg/m3. Please express your answer in units of atm. 
Physics
What is the pressure at a depth of 80 m in the ocean? The density of seawater is 1. 03 × 10 3kg/m3. Please express your answer in units of atm. 
science
how Avogadros hypothesis applied to show molecular mass of volatile substances is twice of Vapour density? 
science
the volume of 50gram of a substance is 20centimetercube if the density of water is 1gram/centicentimetercube will the object float or sink 
SCIENCECHEMISTRY
Find the mass (kg) of a metallic block in the form of a cube 30cm on the side,if its density is 5.6kg/L. 
physics
Find the limiting velocity of a rain drop assuming diameter of 5.0×10^4m.The density of air relative to water is 1.3×10^3 
material science
Derive an expression for the relative density of a regular hexagonal honeycomb made by the expansion process. 
Science
Find molecular mass of an element having Density= 1.56 gm/l Temp.= 65 degree Celsius Press.= 745mm 
Science
1 the term used to describe how light is reflected from a minerals surface is A.glow. B.streak. C. Density. D.luster. 
maths
a solid cone of base radius 5cm and height 6cm is made of metal of density 4g/cm3 
scince
Which of the following is not an example of a physical property of a substance? density combustion solubility freezing point thx 
Chemistry
A student did the Synthesis of Salicylic Acid experiment starting with 3.89 g of methyl salicylate (C8H8O3) and using 40 mL of 6.0 M NaOH. To evaluate her success she needs to determine the limiting reagent. The reaction goes as follows: C8H8O3 + H2O ==> C7H6O3 + CH3OH. ... 
science
what is produced when copper sulphate solution is mixed with ammonia solution? Either copper(II) hydroxide or copper(II) ammine sulfate or both depending upon the strength and the amount of ammonia added. The first is Cu(OH)2, the second is Cu(NH3)4SO4 
chemistry
A solution is prepared with an unknown compound with an empirical formula of C3H7NO. The solution is made by dissolving 30.0 mg of compound in 1.200 g of the organic solvent biphenyl. The freezing point was depressed by 1.37C. What are the molar mass and molecular formula of ... 
Chem 111
A solution is prepared by mixing 499 mL of 0.19 M Tris·Base and 592 mL of 0.37 M Tris·Acid. What is the pH of this solution? [Ka(Tris·Acid) = 8.5 × 109] Round your answer to two places past the decimal. I can do basic pH questions but I am at a loss on this one. Please help. 
PH Calculation
Consider a 0.42 M solution of NaCH3COO CH3COO–(aq) + H2O(l) > CH3COOH(aq) + OH–(aq) Calculate the pH of the solution at equilibrium. Try the weak acid or weak base approximation (as appropriate) and check the validity of the approximation. If the approximation is not ... 
Chemistry
How many grams of cesium chloride (CsCl) will be needed to make 750. mL of a 0.100 M CsCl aqueous solution? The formula mass of CsCl is 168.36 g/mol. Remember Molarity: M = (mol solute) / (L of solution) I need help solving this problem 
College Chemistry
A buffer solution contains 0.120M acetic acid and 0.150M sodium acetate. a. How many moles of acetic acid and sodium acetate are present in 50.0 ml of solution? b. if we add 5.55 mL of 0.092M NaOH to the solution in part (a) how many moles of acetic acid , sodium acetate, and ... 
Chemistry
a solution contains an unkown amount of dissolved magnesium, addition odf 0.0877 mol of Na2CO3 causes complete precipitation of all the magnesium. what is the mass of magnesium was dissovled in the solution? you must write a balanced equation for the raction in order to solve ... 
Analytical Chemistry
Predict the effect (Increase, Decrease, No effect, Indeterminate)and explain why 1. Condition: In the determination of water hardness, the water sample contained appreciable amount of ferric ions Paameter: ppm CaCO3 2. Condition: Instead of MgCl2*H2O, CaCl2*xH2O was added to ... 
trigonometry
1) Find the exact value of the expression: tan−1(tan(−120651/47π))... How do you find Tan(120651/47pi)? I don't know how to find exact values, if it's not a recognizable value. 2)Find a simplified expression for tan(sin−1(a/5))... Because tan = y/x and ... 
maths
how do i solve this equation? there is another answer other than 0, but i am not sure how to get it. 5x^2 + 7x =0 factor the term: x(5x+7)=0 Either term can be zero. You found the x=0, what value of x makes 5x+7 zero? Factor it to this form: x (5x + 7) = 0 There will be a ... 
Chemistry
You have a 12 M solution of hydrochloric acid. How many milliliters of this solution will give 25.0 mL of 2.0 M hydrochloric acid when diluted? Very confusing, If I can get a step by step process on how to figure this out, that would be great. 
Chemistry
You have a 12 M solution of hydrochloric acid. How many milliliters of this solution will give 25.0 mL of 2.0 M hydrochloric acid when diluted? Very confusing, If I can get a step by step process on how to figure this out, that would be great. 
Science
The label on a fertilizer says "ammonium phosphate, muriate of potash, sulfate of potash, and manganese oxide." Is this a mixture, solution or a compound? I don't think it could be a solution, but I'm not sure if it'd be a mixture or a compoundThank you. 
Algebra
Use substitution to determine whether the ordered pair (–2, –3) is a solution of the equation x2 – y = 7. Show some work. Be sure to state your conclusion about whether the ordered pair is a solution or not. 
Algebra
Use substitution to determine whether the ordered pair (– 3, – 2) is a solution of the equation 5x + y2 = –11. Show some work. Be sure to state your conclusion about whether the ordered pair is a solution or not. 
Chemistry
Can anyone tell me if I am right on these? Calculate the amount of solute needed to make each of the solutions 225g of 10% (m/m) K2CO3 solution Answer: 22.5g K2CO3 0.50kg of 18% (m/m) KOH solution Answer: 90g KOH 
Chemistry
You need to prepare 100.0 mL of a pH=4.00 buffer solution using 0.100 M benzoic acid (pKa = 4.20) and 0.240 M sodium benzoate. How much of each solution should be mixed to prepare this buffer? 
Bio Lab
A scientist receives a vial containing protein at a concentration of 35mg ml 1 and is asked to add 0.25ml of it to 6.75mls of Biuret solution. What is the concentration of protein in the Biuret solution in mkg/ml? 
Chemistry
the following acid—base neutralization reaction HNO3 (aq)+ KOH (aq) KNO3(aq) + H2O (I) What is the molarity (M) of an HNO3 solution if 50.0ml is needed to react with 25.0ml of 0.150M KOH solution? 
Chemistry
Suppose you have to prepare 1.00 L of the solution ( KH2PO4 and Na2HPO4 pH=7.31) and that this solution must be isotonic with blood (have the same osmotic pressure as blood). What mass of KH2PO4 would you use?