chemistry! URGENT

59,905 results, page 82

Chemistry

What mass of naoh is neutralized by 43.55ml of 0.145m H2SO4?

Chemistry

What is the mass of all atoms in 2Fe+3O2=2Fe2O3

Chemistry

How do i figure out if 2NO2 -> N2O4 is a redox reaction

Chemistry

name the three fundamental particles present in an atom

chemistry

what type of a ligand would 18 crown 6 ether be? hexadentate?

Chemistry

Compare the diffusion rates of hydrogen and oxygen gases.

Chemistry

How many moles of oxygen (O2) are required to completely react with 27.4 mol of H2?

Chemistry

How do I make 500ml of a 0.3% chlorine dioxide solution from 6.4% tablets?

Chemistry

Why is methyl orange not suitable indicator for h2c2o4 and naoh

chemistry

Which one has more hydrogen bonding- ethanol or methanol

Chemistry

Which reagent has been oxidized in the following equation ? H2(g) + N2(g) === NH3(g)

Chemistry

Which reagent has been oxidized in the following equation ? H2(g) + N2(g) === NH3(g)

Chemistry

How many moles of O2 must react with 0.550 mole ofMethanol?

Chemistry

How many grams of NO2 are needed to form 100.0g of HNO3?

Chemistry

If it is known that the iron(ii) salt is FeSO4.7H20 calculate the %Fe from the formula

pre-ap chemistry

how to make 100 mL of a 0.500 M CuSO4 solution

chemistry

who prepaire tris buffer 0.2 mmol/lit calculation

BIO chemistry

What is the pH of a mixture of 0.042M NaH2PO4 and 0.054M Na2HPO4

Chemistry

What mass of CaO, can get by the decomposition of 250 g of CaCo3 with 80% purity?

Chemistry

What is the value for Kb for the formate anion, HCOO-? Ka(C7H5O2)=2.1x10^-4.

chemistry

how do i figure out grams/tablet if I am in units of mol/L? >_>

chemistry

60 gram of urea is dissolved in 250ml. Calculate the molarity

Chemistry

addition of conc H2SO4 to Ph-CH(CH3)OH gives product?????

Chemistry

How many grams of solute are present in 795 ml of 0.130m KBr?

chemistry

calculate the number of moles of Mg in 0.12g(relative mass of Mg=24)

chemistry 12u

how do i calculate this.. a solution of nitrous acid has a pH of 2.73 what is the [H3O+] ?

Chemistry

A solution is 25% by mass calcium nitrate and has a density of 1.21 g/mL what is the molarity?

Chemistry

Concentrated nitric acid is 70% HNO3 and 14.7 M. What is the density of the solution?

Chemistry

How can I make 100ml 0f 2N of HCl? purity is 35% and density is given as 1.18 g/mL

Chemistry

The bond angle of water is decreased from 109Degree 28' to 104Degree 24',why?

Chemistry

Why must not the condensed water drip into the flask?

chemistry

How many grams of CO2 are evolved on heating 200 g of CaCO3.

Chemistry

Which amount of heat is released when 75.0 g of water at 0° C is frozen to ice?

Chemistry

Define indicators giving four examples and their PH ranges

Chemistry

Using benzene as an example to illustrate substitution reaction

Chemistry

a 0.20 mol/l solution of weak base hpo4 has a ph of 9. find the Kb

Chemistry

Identify the compound and classify its functional group in the image H H H H H H H-C-C-C-O-C-C-C-H H H H H H H

Chemistry

a 0.20 mol/l solution of weak base hpo4 has a ph of 9. find the Kb

Chemistry

How many moles are in 7.5x10^24 molecules of carbon dioxide? Grams?

chemistry

what fraction of voids are occupied by sp3 carbon in diamond

Chemistry

Why ionic compounds have high melting points?

chemistry

calculate the normality of 5.56 grams of K2Cr2O7 dissolved in 500 mL

chemistry

caculate the molar concentration of 1ppm solution of NaCl?

chemistry

How many degenerate orbitals have the following name? 2s 3p 5d 4p 5s I don't get this question

Chemistry

What is the amount of oxygen needed to create output 20gm?

Chemistry

What is the kb of a 0.0200 m ( at equilibrium) solution of methyl amine, ch3nh2, that has a ph of 11.40?

chemistry

Calculate the pH of a solution containing 10 g / L of NH4Cl (Kb NH3 = 1.8x10-5

Chemistry

What is the test for ammonium formed on hubber process? i need your help

Chemistry

What volume of nitric dioxied at s.t.p from the below equestion N2+O2=2NO

chemistry

how much ml of oxalic acid is needed to standardize 0.1M NaoH

Chemistry

How much heat is produced by the complete reaction of 5.29 kg of nitromethane?

chemistry

How to solve CoCl2+HO2- ------> Co(OH)3+ Cl- by half reaction method

Chemistry

Describe how lead(II) iodide cen be prepared in the laboratory

Chemistry

The weight of a pure sample of KClO3 to be decomposed in order to get 0.96 of O2.

Chemistry

How many mL of 0.1 N NaOH are required to react with 100 mEq of H2SO4?

CHEMISTRY

Why is glass considered as a supercooled liquid? answer please!!!

chemistry

what is the concentration of na and co3 ions in 0.2M aqueous solution of na2co3

CHEMISTRY

CALCULATE THE DECREASE IN TEMPERATURE FOR 22.0 G SILVER THAT LOSES 625 J

math or chemistry

Check pls. 5.4 x 10^-2 by 2.5 x 10^-3 by 7.9 x10^-3 m volume = 107.44 x 10^-8 m^3

Chemistry

How does hybridisation of PCL5 change when it is decomposed to PCL3 and Cl2?

chemistry

When are more products of a reaction available initially than at equilibrium? A. K = 0 B. Q < K C. Q = K D. Q > K

AP Chemistry

What should be the range for the exponent of [H+] in solutions that are characterized as acidic? A. 0 to -0.07 B. 0 to 0.7 C. 0 to -7 D. 0 to 7

ap chemistry

When are more products of a reaction available initially than at equilibrium? A. K = 0 B. Q < K C. Q = K D. Q > K

Chemistry

When are more products of a reaction available initially than at equilibrium? A. K = 0 B. Q < K C. Q = K D. Q > K

Chemistry

How many grams of ammonia are needs to produce 0.5kg of NH42So4

Chemistry

if I want to show the results of a nitrate analysis as nitrogen what is the equation

Chemistry

Is the flame coloration a test for the metal or for the acid radical?

CHEMISTRY

calculate the weight of co2 by complete combustion of 1.5 \g of ethane

Chemistry

What is the molar volume of pure water at 22 degrees Celsius?

chemistry

complete the equation for the reaction of the soap with magnesium chloride

Chemistry

Among the following electrons, which has highest energy? a. n = 3, l = 2, m = 0, s = + 1/2 b. n = 4, l = 0. m= 0 , s = - 1/2 Ans is A... but how A? Why nOt B?

chemistry

A sample on analysis shows 50% cao what will be the % of calcium carbonate in it

Chemistry

Please Write Out The Equation Of This Reation NaCO3XH2O

chemistry

calculate the normality of 4g of sodium hydroxide in 100ml of solution

chemistry

what is the type of catalyst that corresponds the use of the platinum wire

Chemistry

what is the energy if a photon of red light that has a wavelength of 8.90x10^-7

Chemistry

Gives isomeric compound of C3 H8 O woth IULAC names

Chemistry

Calculate the number of H Atoms present in 0.125 g CH3OH

chemistry

increasing order of boiling points of NO2, KCl and N2

Chemistry

How much heat is required to melt 110g of ice at-45°C?

chemistry

How many grams of potassium iodide, KI, are required to make 2.0 L of a 0.1M solution?

Chemistry

What mass of Cu(IO3)2 can be formed from 0.690g of CuSO4-5H2O?

Chemistry

Does group 18 elements like He, Ne, Ar, Kr soluble in organic solvents?

chemistry

HClO4 Express your answers as ions separated by a comma.

chemistry (charges)

just want to check if this group is neutral, R-NH2 thanks!

Chemistry

What is the frequency of light that is composed of photons that each has an energy of 5.20 × 10−25 J -Do I divide this by 3.00 X 10^8

Chemistry

What amount of naoh require to neutralize 1kg HCl

chemistry

Suppose 5 ∫ f(x)dx=6 ∫ 2 3 ∫ f(x)dx=1 ∫ 2 5 ∫ f(x)dx=4 ∫ 4 4 ∫ (6f(x)−1)dx= ? ∫ 3 help, please? I got the answer of 5, but it says its wrong

Chemistry

How many electrons in an atom could have these sets of quantum numbers? n=2 n=5, l=3 n=6, l=1, ml=-1

CHEMISTRY

CALCULATE THE OSMOLARITY OF THE FOLLOWING ).1M KNO3 & ).35M Na3PO4 & 0.35

Chemistry

5g of salt are dissolved in 200g of water,what mass of solution is this?

Chemistry

Why we add HCL ot H2SO4 during the experiment Of iodometry?

Chemistry

When We Balance Equations In Chemical Reaction,we Are Obeying The Law Of

Chemistry

How many mL of 0.100 M NaOH are required to neutralize (or titrate) 25.0 mL of 0.15 M H3PO4?

Chemistry

How many milliliters of 2.3 M NaOH are needed to neutralize 4.2 mL of a 5.4 M H2SO4 solution?

chemistry

Please help: How do you prepare 2 L of formate buffer pH=3.14 (c=0.05mol/l) (pk=3.74). THEY WANT THE VOLUMES THANKS

chemistry

what are atoms of nitrAogen with different numbers of neutrons called?

Chemistry

what are atoms of nitrogen with different numbers of neutrons called?

chemistry

CH3-C(triple bond)C-CH-C2H5-CH3product a and product b

chemistry

CH3-C(triple bond)C-CH-(C2H5)CH3product a and product b

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