CHEMISTRY (WEBWORK)

58,560 results, page 90

chemistry

Potassium permagnate +ferrous sulphate+ sulphuric acid molecular formula

chemistry

Please...how do you calculate the reduction potential for 1 M CuSO4? I've been trying for hours......!!

chemistry

how much heat is required to melt 15 g of ice which is at a temperature of 0 degrees celsius

Chemistry

8 mL of 2.5 M phosphoric acid is neutralized with 500 mL of potassium hydroxide. What is the concentration of the base?

Chemistry

What volume (in liters) is occupied by 3.85×10^22 nitrogen molecules at 105 C and 255 mmHg?

chemistry

How many moles of HNO3 are present if 0.236mol of Ba(OH)2 was needed to neutralize the acid solution?

Chemistry

Suppose you have a strong peak at 2230 cm–1. What is the wavelength of the radiation that was absorbed?

Please help. Chemistry

What is the MAIN reason for storing sodium metal in mineral oils?

chemistry

the density of alcohol is 0.789 g/ ml at 20 degree celcius . calculate the mass of a 30 ml sample?

Chemistry

How many grams of SO3 are needed to make 250 ml of 0.750 molar solution?

Chemistry

Given 1.7 g of hydrobromic acid (48%) calculate the number of mL. (MW HBr: 80.91 g/mol, density: 1.49 g/mL)

Chemistry

What is the solubility of benzoic acid in room temperature water. Report this in grams/L.

chemistry

your in seam is 35.0 in.how many cm is this?show your final answer with units and correct sig figs.

chemistry

What is the density of a substance that weighs 500g and fills a container that is 1/2 liter in size?

Chemistry

Which hydrocarbon is least likely to dissolve in water - hexane, butane, decane?

Chemistry

Calculate the number of grams necessary of C6H12O6 to make 1.00 ml of 0.025 M glucose.

chemistry

when you burn ionic and covalent compound using Bunsen burner,what you will see?

Chemistry

How many hydrogen bonds can an ethanol molecule form to neighboring water molecules ? Why?

chemistry

Vacuum filtration is avoided when crystals are isolated from a very volatile solvent. why?

Chemistry

Is 3HCl(aq)+HNO3(aq)->Cl2(g)+NOCl(g)+2H2O(l) an oxidation-reduction reaction?

chemistry

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

General Chemistry

Which chemical reactions would you consider to be of importance to a healthcare professional and why?

chemistry

convert the following measurements to the units specified 1) 357ml = ?L 2) 25kg = ?mg 3) 35,000cm = ?L

chemistry

convert the following measurements to the units specified 1) 357ml = ?L 2) 25kg = ?mg 3) 35,000cm = ?L

chemistry

How would you prepare 500 ml of a 1.8 M phosphate buffer (pH 6.8) containing 4.5 x 10-6 M CaCl2 and 52 mM sucrose?

chemistry

-What volume of .500 M Pb(NO3)2 is required to react completely with 18.25 L of .625 M Na2SO4?

chemistry

-What volume of .500 M Pb(NO3)2 is required to react completely with 18.25 L of .625 M Na2SO4?

chemistry

why should we add 273 to convert a given celcius value in to kelvin?

chemistry

calculate the volume in milliliters of a 5.55g sample of solid with density of 3.67g/ml

chemistry

about how many bacteria (e coli) would you have to line up to stretch 1mm??

Chemistry

How would I calculate the mass of 20ml of a 3% hydrogen peroxide from a 30% H2O2 solution?

Chemistry

how would you prepare 500 ml of .2M solution starting with solid NaH2PO4*H20?

chemistry

what was the precipitate formed of pottasium bromide and lead nitrate mix with water?

Chemistry

In industrial plants, what specific type of oil is used as heating medium?

chemistry

In industrial plants, what specific type of oil is used as heating medium?

chemistry

What mass of electrons would be required to just neutralize the charge of 1.4 of protons?

chemistry

What is the density of a sample of 65.0mL of automobile oil having a mass of 59.82g

Chemistry

A chemist requires 0.780 mol Na2CO3 for a reaction. How many grams does this correspond to?

Chemistry

What are washers, nuts, and bolts made of? Aluminum, Zinc, Iron, or Nickel?

chemistry

which of the ff are gases at 50 degrees celcius bromine, mercury, propane, radon, silver

Intergated chemistry/physics

What is the speed (in m/s) of an object that has a mass of 2.5 kilogram and a momentum of 1,000 kg m/s?

chemistry

What is the mass of 1120cm cube of hydrogen gas at 750mmHg and 40 degree celsius

Chemistry

In a titration of 35.00 mL of 0.737 M S, __________ mL of a 0.827 M KOH solution is required for neutralization.

Chemistry

In a titration of 35.00 mL of 0.737 M S, __________ mL of a 0.827 M KOH solution is required for neutralization.

chemistry

certain electromagnetic wavelenght radiation has frequency of 98hz .what will be its wave lenght?

Chemistry

Calculate the pH and the pOH of an aqueous solution that is 0.025 M in HCl(aq) and 0.075 M in HBr(aq) at 25°C.

chemistry

calculate the mass of sodium hydroxide needed to prepare 100 ml of a .10 m solution

chemistry

calculate the mass of sodium hydroxide needed to prepare 100 ml of a .10 m solution

Chemistry

What mass of NaOH is required to prepare 500.0 mL of 0.1029 M stock solution?

Chemistry

Most of the matter in the universe is of which element? How and where do elements more complicated than this form?

AP Chemistry

What effect would a catalyst have on the rate of reaction for the decomposition of ozone?

chemistry

Approximately what electronegativity difference would you expect for a polar covalent bond?

Chemistry

What is the concentration of a solution made by diluting 95 mL of 6.0 M HCl to a final volume of 750 mL

chemistry

an ionic equation has 2H+(AQ)on the left side and H2(g) on the right. Are these species spectators? explain.

chemistry

calculate the relativistic mass of 1.81x10^24 photons (3.00 mol) with wavelength of 450 nm.

chemistry

what is the molarity of a h2so4 solution if 18.5ml of naoh are needed to neutralize 25.0 mL of the sample?

Ap Chemistry

What is the energy of a photon corresponding to radio waves of frequency 1.465 106 /s?

chemistry

Why adding NH4OH to Al3+ , forms Al(OH)3 and not complex ion Al(NH3)3 ? thanks so much

Chemistry

why would a molecule change color under acidic or basic conditions?

chemistry

3. What volume of 0.18M Na2CO3 would neutralize 25ml of the HCL solution?

chemistry

If 25.0mL of 0.56 M H2SO4 is diluted to a volume of 125 mL, what is the molarity of the resulting solution?

chemistry

A 150mL sample of 0.45 M HNO3 is diluted to 450 mL. What is the molarity of the resulting solution?

Chemistry

How many molts of H2O would be produced if 3.61 molt HCI react with an excess of Ca(OH)2?

Chemistry

How many moles of H2O would be produced if 3.61 molt HCI react with an excess of Ca(OH)2?

Chemistry

Please help me, determine the molarity of a solution containing 2.5 moles CuSO4 in 4.2 L of water

chemistry

I want to make a 3% potassium sulphate solution. How many grams or mg I need per 100 ml

chemistry

Calculate the grams of solute needed to prepare each of the following. 55.0 ml of a 6.50 hcl solution.

Chemistry

Express your answer as a chemical formula. 1.Cr^-3 and Br^- 2. Fe^3+ and O^2- 3.Hg2^2+ and CO3^2- 4.Ca^2+ and CIO^3- 5. NH^+4 and PO4^3-

Chemistry

Calculate the mass of CO2 emitted (in lbs) when 1 gallon of octane is burned

chemistry

what is the minimum of amount of KCN in moles needed to extract 29 grams of gold

Chemistry

550 mL of Ar at 632mm Hg will occupy what volume at 750mm Hg with the temperature remaining constant?

Chemistry

What role does a catalyst play in a chemical reaction in terms of rate and yield

chemistry

Which of the following does NOT belong with the others? A. HCl B. HNO3 C. H2O2 D. H3PO4 I say A

chemistry

Which ion is absorbed by a base in water? A. H3O+ B. OH- C. Neutron D. Transition metal B

chemistry

Calculate the mass in grams of 2.50 mol iron(II) hydroxide. A. 29.5 g Fe(OH)2 B. 184.5 g Fe(OH)2 C. 225 g Fe(OH)2 D. 3.38 x 10-2 g Fe(OH)2 C

chemistry

how many liters of O2 gas measured at 784mmHg and 25'C are required to completely react with 2.3 mole of Al?

chemistry

how many atoms of each element are present in five formula units of calcium permanganate?

chemistry

How many grams of solute are required to prepare 500ml of 0.5M urea solution,CO(NH2)2?

chemistry

What volume will a mixture of 5.00mol of He and 0.800 mol of CO2 occupy at STP?

chemistry

what is the molarity of the acid in when a 30mL sample of HCl is titrated with 10mL of 6M NaOH?

Chemistry

Hi, I need help with something. What are the correct formulas and names of manganese and oxygen compounds.

Chemistry

What is the final volume (L) of a 1.00 L system at 315 K and 1.10 atm if STP conditions are established?

chemistry

How many atoms of tin are necessary to react completely with 7.42 x 10(24th)g of HF. Sn(s) + 2HF(g) = SnF2(S) + H2 (g)

Chemistry

How many hours are required for the deposition of 15.0 grams of Al from molten AlCl3 by a current of 15.0 amps?

Chemistry

You dissolve 17.1 gms of sucrose (sugar) in 100 mL of ethanol 20ºC. What is the molarity (M)?

Chemistry

Is the bond in the molecular orbital energy level diagram of Li2 stable?

Chemistry

What element is undergoing oxidation (if any) in the following reaction? CH4(g) + 2 O2(g) ¨ CO2(g) + 2 H2O(g)

Chemistry

Write equatios for the ionization of the following acids. (a)HF , (b)H2SO3 , (c)CH3COOH , (d)HNO3.

Chemistry 3A

what is the maximum number of electrons that may occupy the second electron energy level?

Chemistry 3A

what is the maximum number of electrons that may occupy the second electron energy level?

chemistry

2NaClO2---> 2NaCl + 3O2 if 3.85 grams of NaClO3 react, how many moles of O2 are created?

Chemistry

What is the name (NOT THE NUMBER) of the group whose elements carry a neutral charge?

Chemistry

The relationship between ionization energies as evidence for electron configuration for elements?

chemistry

Only pure substance are homologous,true or false? Can you please explain too?

chemistry

Calculate the degree of polymerization n of polystyrene with a molecular weight of 3.091*10^6 g/mol.

Chemistry

How do you demonstrate that fog, clouds,and steam are liquid droplets and not water vapor?

chemistry

what is the limiting reagent in a reaction between copper sulfate and barium nitrate?

Chemistry

How do you write the chemical equation of the dissociation of nicotinic acid, C5H4NCOOH, in water?

Chemistry

Calculateenthalpychangeforthereaction2N2(g)plus 5O2 gives 2N2O5 Basedonthefollowinginformatin2H2(g)plusO2(g)gives2H2O(l)

chemistry

can i mix hypochlorite powder and baking soda to make a bleach solution?

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