chemistry! URGENT

59,905 results, page 94

chemistry

Can someone pleeeeeaaase explain Charle's law in a simple way.

Chemistry

As I understand it--As an acid is added to neutral water the (OH-) will...decrease?? Is this right?

Chemistry

What minimum amount of 1.55 M \rm HCl is necessary to produce 26.5 L of \rm H_2 at STP?

chemistry

KMnO4 + H2SO4 + KNO2---> MnO2 + KNO3 + K2SO4 + H2O

Chemistry

what elements are found in the following substances? C6H12O6, NaCl, NaHCO3

Chemistry

Describe the density and compressibility of solids versus liquids and gases.

chemistry

what is the mechanism of formation of various hydrazides by using hydrazine hydrate

Chemistry

Express the concentration of a 2.0 M NaOH solution as a mass/volume percent.

chemistry

How does a straw work? Using the Kinetic Molecular Theory to explain?

chemistry

a 100ml solution of 0.01M sodium chloride has how many ppm (mg/L) please?

Chemistry

in any aqueous solution what effect does the addition of NaOH (aq) have on the concentration of H+ (aq)

Chemistry

Which of ions most abondant in sea water Na+ ,Ca2+ ,Cl-,HCO3-

Chemistry. Please help quick!!!

Is this chemical formula (Fe2O3) iron oxide?

chemistry

what is the difference between a redox rxn in and acidic soln or basic

Chemistry

If a plant produces 8.06 mol of C6H12O6 how many moles of CO2 are needed

Chemistry-please help quick!!

Write the balance chemical equation for lime.

chemistry

Who much molar energy is releced from reacting NaHSO3 and HOCl?

chemistry

why the increasing in substrate concentration increase in the rate of reaction of enzymes.

chemistry

How can you precipitate BaCrO4(s) from a solution of barium nitrate and potassium dichromate?

chemistry

What is the absolute entropy of 3.1 mol of gaseous ammonia at 1.8 bar and 298 K?

chemistry

wh should the maximum percent yield never be above 100%

chemistry

why is it unwise to boil the oxolate solution in preparation for it's titration with permanganate

chemistry

How many moles of NaOH must be added to 1.00L of this solution to increase the PH to 9.25?

chemistry

why does a desert cooler cool better on a hot dry day ?

Chemistry

How would you separate a mixture of potassium chloride from copper metal?

Chemistry

Ammonia is a stronger ligand than is the chloride ion. What does this statement mean?

Chemistry

How many grams of CaSO4 are present in 320ml of a 0.00810 M solution of this compound?

Chemistry

Balancing Equation Al2C3O3 + H3PO4 --> AlPO4 + CO2 + H2O

chemistry

could the products ever become the reactants in chemical reaction? explain. thanks!

AP Chemistry

how many milliliters of 0.125 M H2SO4 are needed to neutralize 0.200 g of NaOH?

chemistry

What is the pH of an aqueous solution of a weakly acidic drug that is 40% dissociated and has a pKa =4.7?

Chemistry

Calculate the temperature at which k = 2.0 s-1 if k = 10.0 s-1 at 371 K. The activation energy for the reaction is 30.0 kJ mol-1.

chemistry

What mass in kilograms of E85(d = 0.758g/mL) can be contained in a 11.5gal tank?

chemistry

What is the density of a sphere with a radius of 12.7 meters and a mass of 285 kilograms?

Chemistry

What does the reaction of alkaline earth metals with water tell you? Thanks in advance.

chemistry

The concentrations of Ca and Na in a sample of river water are 13.4 mg/kg and 5.2 mg/kg. Express the concentration in molality

Chemistry

Calculate the H+ ion concentration if 0.20M NH3 solution is 2.5% ionized.

Chemistry

Which element has no stalbe isotopes: 82Pb, 27Co, 51Sb or 90Th?

AP Chemistry

What is the molarity of 827 mL of a solution that contains 0.057 mol of solute?

Chemistry

If your body develops a charge of -18 (microcoulombs), how many excess electrons has it acquired?

General Chemistry

A solution of LiCl in water has XLiCl = 0.0800. What is the molality?

chemistry

how would you, explain ans how calcium chloride [CaCl2] is bonded.

chemistry

how many grams of carbon dioxide can be produced by burning 7.04moles of propane

chemistry

What is the nuclear symbol for the radioactive isotope of copper with a mass number of 60?

Chemistry

Calculate the molarity of a 100. mL solution containing 22.3 g of sucrose (C12H22O11)

chemistry

large and small number are most easily handle when expressed in

chemistry

Which of the following elements is synthetic? uranium iodine helium nobelium

Chemistry - ASAP please!

what is the hybridisation state of the oxygen of a carbonyl group

chemistry

Radon-222 undergoes alpha decay.what is the nuclear equation

Chemistry

What is the temperature change in celsius when 29.5L of water absorbs 2.3 kwh of heat?

Chemistry

Round this to two sig figs: 4025000 Is the correct answer 4.0 x 10^6?

Chemistry

calculate the volume of a rectangular prism with a length of 5.6 , a width of 2.1 , and a height of 6.6 .

chemistry

what type of bond would carbon, sodium, and neon form?

chemistry

what is the complete ionic equation for the double displacement of CuNO3(aq)+K2S(aq)

Chemistry

How would we make 500mL of a 1.5 percent w/v solution of KCl in water?

Chemistry

The solution CrCl3 is not colored. What does this suggest about its electron configuration?

chemistry

A radio broadcasts at 101.3 Megahertz. What is the wavelength of the signal in meters?

chemistry

for depolarization of 1 mole of KMnO4, the moles of H2O2 required is_________

chemistry

How much L and concentration of NaOH do i need to neutralize 500 L 22% HCL?

Chemistry

Balance the equation and write the reaction-quotient expression, Qc. U(s) + F2 (g) <----> UF6 (g)

Chemistry

How many photons with a wavelength of 450 nm is required to have mass of 1.25 micrograms?

chemistry --

What determines whether 2 or 3 electrons will be removed from Fe when it reacts with another chemical or element?

chemistry

'electrolysis of dilute aqueous solutions kcl,cucl2,kl,agno3'?

Chemistry

A radio wave has a frequency of 3.6 x 10^10 Hz. What is the energy (in J) of one photon of this radiation?

Chemistry Lab

Does the pressure exerted by a gas depend on its molar mass?

chemistry

What is the chemical formula of the compound that forms between lithium (Li) and phosphorus (P)?

Organic Chemistry

what is the major product of a reaction with 1-butene and Br2 in water?

CHEMISTRY

Are you always solving for final volume in the combined gas law?

Chemistry

#26 The Ksp of lead(II) carbonate, PbCO3, is 7.40 × 10-14. Calculate the solubility of this compound in g/L.

Chemistry

#25 The Ksp of nickel(II) hydroxide, Ni(OH)2, is 5.84 × 10-16. Calculate the molar solubility of this compound.

Chemistry

If 25.9 mL of 300 M NaCl is diluted to 136 mL, what is the molarity of the dilute solution?

Chemistry

Which metal ion produces the light with the highest energy? a. Na+ b. Ca+ c. K+ d. Ba2+

chemistry

calculate the value of the equilibrium constant K for this reaction A+B <--> C from the following information 3C <--> D Kc= 7.1*10^-4 D <--> 3A + 3B Kc= 2.9*10^-2

chemistry... HELPP

What is the cell potential for the reaction Mg(s) + Fe^2+(aq) -----> Mg^2+(aq) + Fe (s) at 63 degrees celsius when [Fe^2+]= 3.30 M and [Mg^2+]= 0.110 M

Science- chemistry

After extraction with bicarbonate in which layer is the benzoic acid?

chemistry

Which of the following does NOT belong with the others? A. HNO3 B. H2SO4 C. H2CO3 D. OH- I think D

chemistry

Just wanted to say thank you very much for the help I got from everybody :)

chemistry

Give the orbital designations of electrons with the following quantum numbers" (a) n = 3, l = 0, m1=0 (b) n=2, l=1, ml=-1 (c) n=4, l=3, ml=-2 (d) n=4, l=2, ml=0

Chemistry

How many grams are in 50.0 mL 2.0 M of HCl? Please help me!!! I think the answer is 3.57g but I am not sure. Thank you :)

chemistry

calculate the mass of naso4 needed to prepare of 0.5L of 0.15M of solution

chemistry

what is the total pressure in a gas mixture of 100 mm hg O2, 820 mm hg N2, and 1.5 mm hg CO2?

chemistry

what is the total pressure in a gas mixture of 100 mm hg O2, 820 mm hg N2, and 1.5 mm hg CO2?

Chemistry

Select all suitable dopant atoms from the following list: P B Mg Ga As In Sb Al Tl H

chemistry

If isomers of an alkane have the same molecular formula, how do they differ?

chemistry

solve the following and express your answer in scientific notation: (5.3 x 10^4) + (1.3 x 10^3) A. 5.4 X 10^4 B. 5.4 X 10^8 C. 6.6 X 10^7 D. 6.9 X 10^7 I say c

chemistry

How would you prepare a supersaturated solution of CuSo4 in 100ml of water

Chemistry 1115

How do you calculate the molarities of HC2H3O2 and NaC2H3O2 in a buffer solution?

Chemistry

How to predict the possible structures of a compound if the degree of unsaturation of it is in fraction?

Chemistry

How many kilograms of chalcopyrite must be mined to obtain 315g of pure Cu?

chemistry

How many moles of glucose would be present in: 1Litre of a 5micromolar solution?

Chemistry question

Why do ionic compounds have high melting points?

Chemistry

What type of bonds(sigma or pi) and how many of each are used to form a triple bond?

chemistry

what is the external pressur, if ethanol is boiling at a temperature of 70 degrees celsius

Chemistry 3A

what volume would 10.5 g of nitrogen gas, N2, occupy at 200 K and 2.02 atm?

chemistry

what is the pH of the solution formed when 25 mL of 0.173 M NaOH is added to 35 mL of 0.342 M HCl?

chemistry

what is the pH of the solution formed when 25 mL of 0.173 M NaOH is added to 35 mL of 0.342 M HCl?

Chemistry 3A

calculate the empirical formula for an unknown compound from the following information: C= 39.2%, H= 8.73% and O= 52.1%

Chemistry

what is dispersion,dipole,hydrogen bonding of HBr NH3 NaF

Chemistry

what is dispersion,dipole,hydrogen bonding for NaF,N3H,NaBr.

chemistry

What are the steps in finding the balanced equation for the complete combustion of benzene?

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