a density of 1.0 M solution of NaCL
29,680 results, page 84

Physics
Some spacecraft design uses a solar sail made of aluminized plastic. As sunlight reflects off the sail, radiation pressure drives the spacecraft outward away from the sun. a. If the sail material has a density of 600.0 kg/m3, what is the maximum thickness of the sail for which... 
Solar Energy please help
Solar simulators are used to study the performance of solar cells in the lab. In the figure below (left picture), the spectral power density of a solar simulator is shown with the blue line. The spectral power density of this solar simulator is given by: P(λ)=7.5∗... 
Algebra 2
One hundred liters of a 57.84% acid solution is obtained by mixing a 75% solution with a 42% solution. How many liters of each must be used to obtain the desired mixture? A) 40 liters of 75% acid and 60 liters of 42% acid B) 53 liters of 75% acid and 47 liters of 42% acid C) ... 
Algebra 2
One hundred liters of a 57.84% acid solution is obtained by mixing a 75% solution with a 42% solution. How many liters of each must be used to obtain the desired mixture? A) 40 liters of 75% acid and 60 liters of 42% acid B) 53 liters of 75% acid and 47 liters of 42% acid C) ... 
8th grade
Dear Sir, I have question related to Acids and Alkalis is that; You are given a colourless solution.Describe three tests you would carry out to determine the solution is an acid or an alkali without tasting or using indicators. Please reply me quikly 
Chemistry
You have a reaction using the following criteria: 1.3456 g of barium chloride solution (0.786M) is mixed with 1.20089 g of sodium sulfate solution (1.3M). The ambient pressure is 754.564 mmHg and the temperature is 56.889 degrees celsius. Determine the volume of the gas produced. 
biochemistry
The enzyme alcohol dehydrogenase catalyzes the following reaction: Ethanol + NAD+ acetaldehyde + NADH + H+ You have a 1 ml solution containing 100 µM Ethanol, and 1 mM NAD+. You then add 1 mg of alcohol dehydrogenase. Assume all of the ethanol gets converted to ... 
CHEM
A scientist wants to make a solution of tribasic sodium phosphate,Na3PO4 , for a laboratory experiment. How many grams of Na3PO4 will be needed to produce 575mL of a solution that has a concentration of Na^+ ions of 1.40 M? Answer: mass of Na3PO4 = _____ How is this question ... 
Chemistry
A volume of 70.0mL of aqueous potassium hydroxide(KOH) was titrated against a standard solution of sulfuric acid (H2SO4). What was the molarity of the solution if 19.2mL of 1.50M H2SO4 was needed? The equation is 2KOH+H2SO4>K2SO4+2H20 
algebra
A taxi service offers a ride with an $5 surcharge and charges $0.50 per mile. How many miles can a customer travel and spend at most $30? What linear inequality with variable x represents this situation? What is the solution to that inequality? Enter the solution as an ... 
Chemistry AP
At 20◦C the vapor pressure of pure methanol (CH3OH) is 89.0 torr and of pure water (H2O) is 17.5 torr. A solution of methanol and water has a total vapor pressure of 35.5 torr at 20◦C. Calculate the mole fraction of methanol in this solution. Assume the solution ... 
Science
The following questions concern the iconic Nestle Toll House Chocolate Chip Cookie recipe, shown below: 2 1/4 cups allpurpose flour 1 teaspoon baking soda 1 teaspoon salt 1 cup butter or margarine, softened 3/4 cup granulated sugar 3/4 cup packed brown sugar 1 teaspoon ... 
Chemistry
When we did a SN1 reaction forming tamyl chloride from tamyl alcohol and HCl (cleaning the crude sample with NaCl and NaHC03, using CaCL2 as a drying agent) we observed a low boiling fraction around 40 degrees Celsius during distillation. Question: What might be present in ... 
chemistry
Standard Addition Question: Serum containing Na+ gave a signal of 4.27 mV in an atomic emission analysis. Then 5.00 mL of 2.08 M NaCl were added to 95.0 mL of serum. This spiked serum gave a signal of 7.98 mV. Find the original concentration of Na+ in the serum. I can't figure... 
Chem
Separate the following balanced chemical equation into its total ionic equation. AgNO3(aq)+NaCl(aq) > NaNO3(aq)+AgCl(s) (List the ions in order of the above equation.) Write the net ionic equation for the reaction above. (Make sure the cation is first and anion is ... 
CHemistry Please Help..............LAB
Standardization of the Sodium Thiosulfate Solution Make up a standard solution of potassium iodate by accurately “weighing by difference” about 0.1 g of KIO3 and placing it in your 100 mL volumetric flask. Fill the flask to mark with distilled water. Potassium iodate ... 
chemistry help !!!!!!!!!!!!!!!!
complete the following paragraph relating to the enzyme,b galactosidase .this enzyme hydrolyses the disaccharide lactose to constituent monosaccharides ,galactose and glucose ,drag and drop the approprite words into the correct space. the enzyme ,Bgalactosidase is added to a... 
chemistry help !!!!!!!!!!!!!!!!
complete the following paragraph relating to the enzyme,b galactosidase .this enzyme hydrolyses the disaccharide lactose to constituent monosaccharides ,galactose and glucose ,drag and drop the approprite words into the correct space. the enzyme ,Bgalactosidase is added to a... 
math115
There are 42 milliliters (mL) of acid in 200 mL of a solution of acid and water. What percent of the solution is acid? 
Math
do the equations y=2x+3 and x=12y have common solution, no common solution or infinitely many common solutions? 
chemistry
calculate the concentration of each solutions: 3 moles of solute dissolved in 2 liter of solution 6 moles of solute dissolved on 9 liters of solution 4 moles of solute dissolved in 3 liters of solution 
AP Chem
Hey guys! Stuck on some pH problems! Thanks so much in advanced: A) Calculate the pH of a 0.200 M solution of potassium acetate, KCH3CO2, in water at 25 °C. At this temperature, Ka = 1.76 × 105 for acetic acid. 1. 2.73 2. 5.45 3. 9.02 4. 9.94 5. 10.16 6. none of these Maybe... 
Chemistry
When you pour molten salt(NaCl) into the water, it explodes. But if you pour molten sodium bicarbonate into the water, there's no explosion. Why is this happening??? I'm so confused and I have seen a video of this actually happening. Please help! 
Chem
When an aqueous solution of lithium chloride is mixed with an aqueous solution of ammonium sulfate ______. A. a precipitate form B. a new salf is formed C. a gas is evolved D. an acid and base are formed E. no reaction occurs 
chemistry
A solution is made by mixing 35.0 mL of toluene C6H5CH3d=0867gmL with 125.0 mL of benzene C6H6d=0874gmL. Assuming that the volumes add upon mixing, the molarity (M) and molality (m) of the toluene are so the L of solution is...? 35ml + 125ml and then converting to L?? 
chem
you have 100 mL of a saturated solution of Pb(NO3)2 at 0 degrees celsius. If the solution is evaporated to dryness how many grams of Pb(NO3)2 do you expect to remain in the crucible? Im not sure how to do this because i don't have a number to work with besides the 100ml. Help ... 
mathplease help,need quickly
solve the polynomial inequality and graph the solution set on a real num ber line. express the solution set in interval notation x^3+x^2+64x+64>0 please show work 
Chemistry
If a solution containing 33.82 g of mercury(II) acetate is allowed to react completely with a solution containing 9.718 g of sodium sulfate, how many grams of solid precipitate will be formed? How many grams of the reactant in excess will remain after the reaction? 
please help!!
If a solution containing 33.82 g of mercury(II) acetate is allowed to react completely with a solution containing 9.718 g of sodium sulfate, how many grams of solid precipitate will be formed? How many grams of the reactant in excess will remain after the reaction? 
Chemistry
You titrate a 10.0 mL sample of phosphoric acid with a 1.65 M solution of the base potassium hydroxide. It takes 7.55 mL to reach the endpoint of the titration. What is the molar concentration of the original solution of phosphoric acid? 3KOH + H3PO4 > K3PO4 + 3H2O 
Chemistry
A sample of ca(oh)2 is allowed to stand in distilled water until a saturated solution forms. A 50.00 mL sample of this saturated solution is neutralized with 24.4 mL of 0.05 mol/L Hcl 2hcl+ ca(oh)2>cacl2+2h2o Use this information to calculate the ksp for ca(oh)2 
chemistry
The heat of solution of ammonium nitrate is 26.2 kJ/mol, and a 7.315 g sample of NH4NO3 is added to 40.0 mL of water in a constant pressure calorimeter initially at 25.2°C, what is the final temperature reached by the solution? (The specific heat of water = 4.184 J/g•°C) 
Biology
You have a stock solution of 100mg/100ml methylene blue and you need 6.0 ml of final solution at 2mg/100ml. Design a serial dilution using volumes between 0.1 and 10 ml. Final volume must be 6ml. 
Math
What must be true about the solution to this system of equations? x+4y+9z = 96 2y+9z = 47 z = 7 a) The solution will describe the intersection point(s) of the 3 graphs. b) The value of z must be 7. c) The solutions will have values for x, y, and z. d) All of the above ... 
pre calculus
Create systems of equations in two variables that have (a) no solution, (b) one distinct solution, and (c) infinite solutions. Show that each system has the indicated number of solutions by using a graph or solving the system. 
chemistry help asap please
You have been given a sample of unknown molarity. Calculate the molarity of a solution which has been prepared by dissolving 8.75 moles of sodium chloride in enough water to produce a solution of 6.22l. 
Differential Equations
we are to find the power series solution for y'=xy. I have calculated to the point that I believe the answer is c_0/2^n*n! First of all is this correct and secondly, how do I write the solution in terms of c_0 * summation of something in terms of x^n? 
Math
Solve the following system of equations. x + 4y= 8 (1) x=54y (2) What is the solution of the system? (Type an ordered pair. Type N if no solution). 
Algebra 1
What is the solution set for an equation in which all numbers work? How big is the solution set for an equation that cannot be solved? 
Math
14+263745+566771. ___? i don't know how to solve this so plz tell me this with solution. 12(24)+(36) my answer is 0 but its wrong i cant understand tell me this with solution plz. Thanks 
chemistry
How many liters of water must be added to 4 liters of a 6 molar HNO3 solution to create a solution that is 2 molar? 
Chemistry
Describe, in detail, how to make 5.5 liters of a 2.5 molar HCl solution from a 10.5 molar HCl stock solution. 
chemistry
A 45.8mL sample of 5.8M KNO3 solution is diluted to 1.00L. What volume of the diluted solution contains 15.0 g of KNO3. 
chem
Describe, in detail, how to make 3.0 liters of a 3.5 molar HCl solution from an 18.5 molar HCl stock solution. 
chemistry
In a .25 M solution, a weak acid is 3.0% dissociated. A. calculate the pH of the solution B. calculate the Ka of the acid Please explain steps. 
Chemistry
How do we prepare 500mL of 0.5 percent w/v solution of NaOH if we have stock solution of 50 percent w/v NaOH on hand? 
chem
How do you prepare a solution of 12 M HCl and want to prepare 500 mL of a 0.4 M solution. Assume you have a 500mL volumetric flask 
math
How much stock solution of hydrogen peroxide 8% will you need to make 320ml of hydrogen peroxide 2% solution? 
Math
How many milliliters of pure acid must be added to 150 milliliters of a 70% solution of acid to obtain a 80% solution? 
chem
how would you prepare 445 grams of solution containing 13% mass HCL from 34.1 mass % of HCL solution 
chemistry
Potassium 2:5 Chloride solution 30ml. How many milliliters of a potassium chloride 3:5 solution do you need to prepare the order? 
Chemistry
how would you prepare 250 ml of 0.69m al2(so4)3 solution from a 2.0 al2(so4)3 stock solution 
Chemistry
how would you prepare 250 mL of 0.69M Al2(SO4)3 solution from a 2.0M Al2(SO4)3 stock solution? 
math
How many quarts of water must be added to 18 quarts of a 32% alcohol solution to dilute it to a solution that is only 12% alcohol. 
math
how many liters of distilled water must be added to 80 liters of 60% acid solution to obtain a 50 % acid solution? 
chemistry
Find the volume of a 2.5 M solution of sulfuric acid required to prepare 300.0 mL of 0.1 N solution of sulfuric acid 
Math
You have 8 liters of a 60% alcohol solution. How many liters of water should be added to make a 35% alcohol solution?. 
Precalculus
What are all the complex and real solutions for x? Where: (x+1)^6 = x^6 and x is complex? The real solution is 1/2 and, the only other solution I could find was x = (1)^(1/3) 
chemistry
queous solution of sodium phosphate (Na3PO4). Adding which compound to the solution will cause a phosphate compound to precipitate? 
algebra
how many liters of distilled water must be added to 80 liters of 60% acid solution to obtain a 50 % acid solution? 
Chemistry
A rock salt NaCl ice and water mixture is used to cool milk and cream to make homemade ice cream. How many grams of rock salt must be added to water to lower the freezing point 10.0C? 
Chemistry
Need help with this question. Any help is appreciated. Heptane, C7H16, and octane, C8H18, form ideal solution. The solution boils at 85.00 ºC and 0.522 atm. (At 85.00 ºC, the vapor pressure of pure heptane is 0.570 atm and the vapor pressure of pure octane is 0.234 atm.) ... 
Chemistry
you measure 5.3g of KOH and dissolve it in enough water to make 400 ml of solution. what is the molarity of this base? You want to neutralize this base with a 3.7M H2SO4. How much sulfuric acid is necessary to do this? x=5.3g/39+16+1 = 5.3/56=.095m M=moles/L of solution = .095... 
Chem
A scientist wants to make a solution of tribasic sodium phosphate, Na3PO4, for a laboratory experiment. How many grams of Na3PO4 will be needed to produce 650mL of a solution that has a concentration of Na+ ions of 1.50M ? Explain answer with three significant figures and ... 
o chem
Impure acetanilide was dissolved in the required amount of hot water. The clear solution in a beaker was immediately placed in an icewater bath, instead of being allowed to cool down slowly. What would be the result of cooling the solution in this manner? 
Organic Chemistry
Cu++ forms a bluegreen complex with tetraphenylporphin in a 1:1 ratio. Say you have 100 mL of a 2.0 x 10^4 solution of the Tetraphenylporphin. Exactly what weight of CuCl2 must be added to the solution to insure complete complexation without any excess cupric chloride ... 
Qualitative analysis
A solution reacts with calcium carbonate to produce a gas. It does not produce a precipitate with either aqueous barium chloride or acidified silver nitrate. Which of the following does the solution contain? A HI B H2S04 C HNO3 D HCl Could someone explain to me how am I get ... 
Chemistry
What formula would you use to solve this problem? I'm stuck. You have prepared a solution by diluting 12.00mL of 0.790M copper(II) nitrate to a total volume of 50.00mL. What is the concentration of Cu2+ ions in the resulting solution? Report your answer to 3 decimal places. 
Reposting Chemistry Question Emergency !!
Saturated solution of Ca(OH)2 in 0.05349 mol/L NaOH. Temperature: 22.1 * C Volume of Ca(OH)2/NaOH aliquot: 25ml Concentration of Standard HCl: 0.1213M Indicator Used: Bromothymol Blue Ksp from previous part I got 3.55x10^5  Average volume of HCl added to titrate was 15.05 mL... 
CHEMISTRY
Ethylamine, CH3CH2NH2, is an organic base with pKb = 3.367 at 298 K. In an experiment, a 40.0 mL sample of 0.105 mol L1 CH3CH2NH2 (aq) is titrated with 0.150 mol L1 HI(aq) solution at 298 K. (a) Write a balanced chemical equation for the neutralization reaction upon which ... 
CHEMISTRY
Ethylamine, CH3CH2NH2, is an organic base with pKb = 3.367 at 298 K. In an experiment, a 40.0 mL sample of 0.105 mol L1 CH3CH2NH2 (aq) is titrated with 0.150 mol L1 HI(aq) solution at 298 K. (a) Write a balanced chemical equation for the neutralization reaction upon which ... 
CHEMISTRY
Ethylamine, CH3CH2NH2, is an organic base with pKb = 3.367 at 298 K. In an experiment, a 40.0 mL sample of 0.105 mol L1 CH3CH2NH2 (aq) is titrated with 0.150 mol L1 HI(aq) solution at 298 K. (a) Write a balanced chemical equation for the neutralization reaction upon which ... 
CHEMISTRY
Ethylamine, CH3CH2NH2, is an organic base with pKb = 3.367 at 298 K. In an experiment, a 40.0 mL sample of 0.105 mol L1 CH3CH2NH2 (aq) is titrated with 0.150 mol L1 HI(aq) solution at 298 K. (1a) Write a balanced chemical equation for the neutralization reaction upon which ... 
CHEMISTRY
Ethylamine, CH3CH2NH2, is an organic base with pKb = 3.367 at 298 K. In an experiment, a 40.0 mL sample of 0.105 mol L1 CH3CH2NH2 (aq) is titrated with 0.150 mol L1 HI(aq) solution at 298 K. (1a) Write a balanced chemical equation for the neutralization reaction upon which ... 
college chemistry
Pentane, C5H12, and hexane, C6H14, combine to form an ideal solution. At 25⁰C the vapor pressure of pentane is 511 torr and that of hexane is 150 torr. In the vapor over a pentanehexane solution at 25⁰C, the mole fraction of pentane is 0.15. What is the mole ... 
Math
1. Calculate the amount of fluorescein (MW 332.31) you will need to make 10 mL of 15 mM solution in ethanol (EtOH). My answer:0.05 g 2.Using Equation C1V1=C2V2 calculate the volume of stock solution (15 mM) you need to make 1 mL of each working solution concentration: 0 mM and... 
physical science
compute the density in g/cm of a piece of metal that has a mass of 0.520kg and a volume of 75cm 
chemistry
how do u calculate the density of an irregular shape? this is 1 of my hm/wk questuions n i wasn't listening...i mean i didn't hear what he said 
chemistry
a test liquid has a density of 1.1g/mL. when you pour some of it into a cup of water, what will happen? 
mentor high
What is the density of carbon dioxide gas if 0.196 g occupies a volume of 100 ml? 
earth science
The Mororovicic Discontinuity marks the change in rock density and elasticity between the: 
Science
How do I prepare 1% H2SO4 from concentrated sulphuric acid (96% with density 1.84g/ml)? Thank you very much for your help. 
chemistry
The density of a gas is 2.0 grams per liter at STP. Its molar mass is approximately? 
Chemistry II
what is the molar mass of a gaseous organic compound with a density of 3.38 g/L at 40oC and a pressure of 1.97 atm? 
Physical Science
if an object has a mass of 615 grams and a volume of 105cm3 is the density 5.86 g/cm3? 
Science
a cumulus cloud is growing taller, what will happen to the density of the air beneath it? explain 
chemistry
I need to calculate the density, with work shown. 50.0 mg of a gas which occupies a volume of 0.0064 L ? 
chemistry
how much volume would an object have if its density was 3.2 g/ml and had a mass of 2.4 grams 
ut
The density of an unknown metal is 8.94 g/cm^3 and its atomic radius is 0.126 nm. It has a facecentered cubic lattice. 
physics
the density of a block of wood with a colume of 50 cubic centimeters and a mass of 10o grams is 
physics
find the mass of the moon if its radius is 1.76*1000000 m and the average density is 4*1000kg/m cube 
physics
A liquid expands on heating. Explain briefly how its density will change with rise in temperature 
physics
A liquid expands on heating. Explain briefly how its density will change with rise in temperature 
chemistry
calculate the density of oxygen,O/2 under each of the followig conditionsstp,1.00 atm and 35.0 celsius? 
chemistry
give the practical details of how you would prepare a 0.5M hydrochloric from a stock of 34%(w/w)with relative density of 1.18. 
chemistry
Identify (give the name and the structural formula) of an alkane that has a density of 4.558 g/L at 2 atm and 37 C. 
Chemistry
A 0.217kg sample of methylene chloride has a density of 1.326 g/cm3. Calculate its volume. 
Physics
Using volume of a sphere, calculate the average density of Saturn (radius = 60,268 km). 
physics
What is the density of nitrogen gas (molecular mass = 28 u) at a pressure of 1.2 atmospheres and a temperature of 284 K? 
physics
Calculate the internal energy of 25.0 g of lowdensity oxygen gas (O2) at a temperature of 255 K.