a density of 1.0 M solution of NaCL
29,659 results, page 89

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
Can an acidic solution be made less acidic by adding an acidic solution? 
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 
chmistry
Compound: Concentration: Measured deltaT LiCl 6.00 g/kg 0.492 deg C HCl 4.00 g/kg 0.389 deg C NaCl 6.00 g/kg 0.356 deg C Determine the value of the vant hoff factor for each salt for the experimentally measured delta T value. (kf=1.86) I have tried to figure this out, but it ... 
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? 
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 0.180 M sodium benzoate How much of each solution should be mixed to prepare this buffer? 
Chemistry
A sample consist 90% NaOH and 10% CaO,whats the concentration of NaOH in the solution of this 3g sample,dissolved in 250cm3. How many cm3 of H2SO4 with concentration of 0.255M are needed for titration of 100cm3 of this solution 
cheMYSTERY
A 20.00 mL of 0.200mol/L magnesium chloride solution is added to a 95.00 mL of 0.800 silver (I) nitrate solution,Determine the concetration of the silver ions at the end of the reaction and the magnesium ions. and a precipitate is formed. 
Chemistry
A 1N solution of NaOH is diluted 4/20 then rediluted 1:50. What is the final normality? How many grams of NaOH are present in 100ml of the final solution? I sort of understand the basic concept, but I don't really know how to do normality problems. 
Chemistry
A 11.0mL sample of an unknown H3PO4 solution requires 116mL of 0.140 KOH to completely react with the H3PO4. What was the concentration of the unknown H3PO4 solution (answer in M). H3PO4(aq) + 3KOH(aq) > 3H2O(l) + K3PO4(aq) 
Molarity
A 44.8−mL sample of a 7.0M KNO3 solution is diluted to 1.10L What volume of the diluted solution contains 16.0g of KNO3? Would I do the same thing for this one or would does it have an extra step it it. 
Chemistry
you have 5% formic acid solution and a 5% acetic acid solution. You titrate 5mL each with .1868M NaOH. A. Which will need more NaOH to reach the end point? B. How much more? 
Algebra
Meryl needs to add enough water to 11 gallons of an 18% detergent solution to make a 12% detergent solution. Which equation can she use to find g, the number of gallons of water she should be added 
Chemistry
A is a solution of tetraoxosulphate(iv)acid.B contains 3.95g of sodium trioxocarbonate(iv) in 750cm3 of solution.if 22.70cm3 of the tetraoxosulphate(iv)acid neutralized 25.0cm3 of sodiumtrioxocarbonate(iv).calculate the concentration of i) B in moldm3 ii) A in moldm3 
AP Chemistry
If 25 mL of a 0.5 M NaOH solution were needed to reach the equivalence point of a 20 mL HCl solution, what was the initial analyte concentration? I am confused how to solve this problem, and also, what does "initial analyte concentration" refer to? Thanks! 
algebra 2
1. Find the exact solutions of x^2  (y12)^2 = 144 and y = x^2 Is the answer no solution? 2. Solve the system: y^2  4x^2 = 4 and y = 2x Solving this myself I got no solution, but someone who helped me with this question got the answer x= + i sqrt 2, i sqrt 2 
Math
The smallest real number in the solution set of 2x > 6 is 4. A) True B) False  The smallest real number in the solution set of 2x > 6 is 3. C) False  The smallest real number in the solution set of 2x > 6 is a number greater than 3. For example, 3.01 is a real ... 
Math
The smallest real number in the solution set of 2x > 6 is 4. A) True B) False  The smallest real number in the solution set of 2x > 6 is 3. C) False  The smallest real number in the solution set of 2x > 6 is a number greater than 3. For example, 3.01 is a real ... 
chemistry please
molarity of a solution containing 5mL of a 3.512 x 10^5M solution (made from .128g of benzophenone and 50mL of ethanol) and then filled to the 50mL line of ethanol would this be (3.512 x 10^5)(.04) ? 
Science
I need to find out if sucrose, sucrose solution, sodium chloride, sodium chloride solution, water, vinegar, and aluminum are electrolytes and what type of bond they are but I don't know where to look. 
Chemistry
4.00 grams of NaOH have been added to 2.0 liters of water. The molarity of this solution is ____M. the concentration of this solution is ______ grams of NaOH per liter of water 
Chemistry
Calculate the amount of water (in grams) that must be added to (a)5.00 g of urea (NH2)2CO in the preparation of a 16.2 percent by mass solution, and (b)26.2g of MgCl2 in the preparation of a 1.5 percent by mass solution. 
APC Chemistry
Suppose you have a solution containing both an iron (II) salt and an iron (III) salt. How would you proceed to identify both Fe2+ and Fe3+ in this solution? 
chem
a solution of A (molar mass 100g/mol) and B (molar mass 1.10 x 10^2 g/mol) is prepared by mixing equal masses of the two. Find the mole fractions of each component in solution 
Chemistry
A quantity of 100 mL of .5M of HCl (aq) is mixed with 100 mL of .5M of NaOH (aq) in a constant pressure calorimeter. The initial temperature of the solutions is 22.30 C and the final temperature of the mixed solution is 25.00 C. What is "q" for solution and "q" for reaction? 
Chemistry
The solubility of sodium selenate is 84 g/100 g of water at 35 oC. If a solution is obtained by dissolving 92 g of sodium selenate in 200 g of water at 35 oC, What do you call this solution? (A) Diluted (B) Saturated (C) Unsaturated (D) supersaturated 
chemistry
A chemist want to make a 10% Chlorine solution from 30% Chlorine solution and pure water. How much of the two should the chemist mix together to make 20mL. Please help with calculations. Thank you 
Chemistry
Assuming that the [Potato extract] is .001 M and I am going to make a 10 ml solution and each drop is 1/20th of a mL, how do I calculate the [Potato extract] in each reaction solution, using 20 drops, 15, 10, and 5 drops for each one? 
Chemistry
A solution is made by mixing 37.0 mL of ethanol, C2H6O, and 63.0 mL of water.? Assuming ideal behavior, what is the vapor pressure of the solution at 20 °C? ethanol: 0.789 g/mL 43.9 torr water : 0.998 g/mL 17.5 torr 
chemistry
for an aqueous solution having Calcl2 (2molar) and Mgcl2 (5molal) and specified gravity of solution is 1.145 calculate molality of chloride ion and molality if chloride ion. 
Quatitative Analysis
What is the correct charge balance equation for an aqueous solution of MnCl2 that ionizes to Mn2 , Cl–, MnCl , and MnOH ? What is the correct mass balance equation for the same solution? 
chemistry
Knowing the concentration of a solution allows us to find all of the following except A. the mass of a solute. B. the mass of the solvent. C. the volume of the solvent. D. the concentration of a solution when conditions change. 
math
A hallway measuring 90 feet x 7 feet requires 1/2 a fluid ounce of cleaning solution per square foot. How much cleaning solution is required to clean the hallway 
Math
Use the quadratic formula to solve the equation for x in terms of y and y in terms of x. (Enter your answers as a commaseparated list. If there is no solution, enter NO SOLUTION.) 2x^2 + 7xy + 1 − y^2 = 0 (a) x in terms of y x = (b) y in terms of x y = 
chemistry
A buffer solution is made by dissolving 0.45 moles of a weak acid (HA) and 0.23 moles of KOH into 720 mL of solution. What is the pH of this buffer? Ka = 6.2 × 10−6 for HA. Answer in units of pH. i need the answer 
Chemistry
20.00mL of 0.55M CH3COOH solution is mixed with 9.95mL of 1.0M NaHCO3 solution. The reaction occurring is CH3COOH + NaHCO3 > CH3CHOO + Na + H2O +CO2. Which is the limiting reagent in this reaction? 
Algebra 2
Is the solution to this rational expression extraneous? The problem: (2x3)/7 (7x)/14 My answer: x = 9/4 My teacher wants to know if the solution is extraneous and I know I have to plug my answer back into the expression to check but I still don't understand. 
Chemistry
determine the vapor pressure lowering at 27 C of a solution of 750g of sucrose, dissolved in 180g of water. The vapor pressure of pure water at 27 C is 26.7 torr. Assume the solution is ideal 
Chemistry
you need to prepare 100 ml of ph=3.50 buffer solution using 0.100 M formic acid and 0.200 M sodium formate. how much of each solution shoudl be mixed to prepare this buffer? 
math
The equation for the pH of a substance is pH = –log[H+], where H+ is the concentration of hydrogen ions. A basic solution has a pH of 11.2. An acidic solution has a pH of 2.4. What is the approximate difference in the concentration of hydrogen ions between the two solutions? 
Chemistry  Answer Check
Find the molarity given 1.5 Liters of solution containing 62.5 g MgO.  1.03 M Mgo There are 0.32 Liters of a 2.5 M HF solution. How many moles and grams of hydrofluoric acid are there?  0.8 mol and 16 grams 
chemistry
I need a formula for: 0.5 grams of sodium chloride is dissolved to make 0.05 liters of solution. next 0.5 grams of sodium chloride is dissolved to make 0.05 ml of solution. next 670 grams of Pb (C2H3O2)4 are dissolved to make 3.5 ml of solution. 
stats
Particles are a major component of air pollution in many areas. It is of interest to study the sizes of contaminating particles. Let X represent the diameter, in micrometers, of a randomly chosen particle. Assume that in a certain area, the probability density function of X is... 
Statistics
The archeological site of Tara is more than 4000 years old. Tradition states that Tara was the seat of the high kings of Ireland. Because of its archeological importance, Tara has received extensive study (Reference: Tara: An Archeological survey by Conor Newman, Royal Irish ... 
science
which is the correct balanced equation for a given titration process, (a) or (b)? a) 6H+ + 2MnO4 + 3H2O2 > 4O2 + 2Mn2+ + 6H2O b) 6H+ + 2MnO4 + 5H2O2 > 5O2 + 2Mn2+ + 8H2O Process: Make a solution in a 100mL volumetric flask using 1g of NaBO3*4H2O, 20mL of 1M H2SO4, ... 
science
you need to make a 3.5 Molar solution of Ca(OH)2, however, you only want to make 50ml of this Ca(OH)2 solution. How many grams of Ca(OH)2 will you need to weigh out and add to 50ml of water? Mass=VolumeinLiters*Molarity*Molmass 
algebra
Is (5,2) a solution of 4x2y=6 I said no, am I right? I am working on another problem where they want to know if this system of equations is perpendicular or parallel or neither, I said neither. Is this right? I am to solve by using elimination: 2x+3y=1, 4x+6y=2 I keep ... 
math
Is (5,2) a solution of 4x2y=6 I said no, am I right? I am working on another problem where they want to know if this system of equations is perpendicular or parallel or neither,5x+4y=2, 4x5y=4 I said neither. Is this right? I am to solve by using elimination: 2x+3y=1, 4x+6y... 
Word Problem
It is necessary to have a 40% antifreeze solution in the radiator of a certain car. The radiator now has 60 liters of 20% solution. How many liters of this should be drained and replaced with 100% antifreeze to get the desired strength? 
Chemistry
40.0 ml of an acetic acid of unknown concentration is titrated with 0.100 M NaOH. After 20.0 mL of the base solution has been added, the pH in the titration flask is 5.10. What was the concentration of the original acetic acid solution? [Ka(CH3COOH) = 1.8 ´ 10–5] 
Physical Science
Suppose you dissolve 40g of potassium nitrate in 100 cm3 of water at 100 C. If half the solution os poured out, how many grams of potassium nitrate will the remaining solution contain?