chemistry! URGENT

60,487 results, page 52

Chemistry

Calculate the empirical formula of Tylenol: C, 63.56%; H, 6.00%; N, 9.27%; O, 21.17%

chemistry

How many grams of NH4Cl will dissolve at 50 degrees C?

Chemistry

How many moles are in 2.3 grams of oxygen gas.

Chemistry

Is the formation of C2H2 endothermic or exothermic?

Chemistry

What is the pH of a 0.052 Mole solution of HCl?

chemistry

how many protons and electrons are in 7.4 grams of hydrogen?

Chemistry

Find the % ionization if the pH of a 0.10 mol/L solution is 4.5

chemistry

What is the volume of 3.11×10 to the power 23. Molecules of NH3 at S.T.P

Chemistry

Which is more soluble in water, Cl2 or I2?

chemistry

what is the concentration of 24.5g of Ca(NO3)2 in 244mL of water

chemistry

What is the equilibrium constant for 2A + 3B (double arrow) =4C Is it (C)^c/ (A)^a (B)^b

Chemistry

What is the solubility of ZnCO3 at 25 o C in a buffer solution with a pH of 9.74?

Chemistry

What are the number of molecules in 16g of h2co3??

chemistry

Which conducts better, BeCl MgCl2

Chemistry

How can I do an acrostic poem for the word REDOX?

Chemistry

Calculate the ph of a solution that is 0.157m HCI?

Chemistry

What is the oxidation state of chromium in cr2o7^-2

Chemistry

What is the oxidation number for each atom in NH4F? N=+3, H=-4, F=+1 N=-3, H=+1, F=-1*** N=+3, H+1, F=-1 N=-3, H=-1, F=+1

Chemistry

Write on the physical properties of benzene

Chemistry

How many electrons are present in 0.002 moles of O--?

chemistry

a compound or solute will molecular mass 36?

chemistry

a compound or solute with molecular mass 36?

Chemistry

What is the percent of aluminum in Al2(SO4)3? A. 15.8% B. 28.1% C. 56.7% D. 54.0% C?

chemistry

calcuate the normality of 0.2M solution of h3p04 ?

Chemistry

How many ml of 8.00 M Na OH is required to neutralize 200 ml of 4.00 M HCl?

Chemistry

The Ka of an acid is 1.3 x 10–7. Based on the Ka and its relationship with Kw, what is the value of Kb?

chemistry

Why reversible reaction never complete

Chemistry

Calculate the normality of 1.5M sulphuric acid

Chemistry

What is the volume in L of 34.0g of Ammonia (NH4) at STP?

chemistry

Decomposition of nitrogen pentoxide in ccl4

chemistry

Decomposition of nitrogen pentoxide in ccl4

Chemistry

How many molecules are in 5.2L of carbon dioxide gas?

college chemistry

prepare 0.2M phospate buffer of pH 5.7

Chemistry

What is the concentration of a monoprotic weak Acid if its pH is 5.50 and its Ka= 5.7 x 10^-10?

Chemistry

How do you determine the polarity of a substance? Example?

chemistry

why is helium considered a noble gas?

chemistry

how many representative particles are there in 5 mole h2o

CHEMISTRY

why is glass called a supercooled liquid?

chemistry

how many moles of fe are present in 30g of rust?

chemistry

which of following show cistrans isomerism?

chemistry

How to determine saturation point of k2Cr2O7?

chemistry

How do you separate this into ions Na2B4O7

Chemistry

What is the osmotic pressure of blood plasma at 37°c

chemistry

How many grams of fe is present in 30g of FeSO4

chemistry

6 cm/sec to mph i got 9.664mph

chemistry

Lewis sit structure of CH3OH

Chemistry

How many moles of ions are in 1.0 mol NH4Cl?

chemistry

The percentage of nitrogen in magnesium nitride is.?

Chemistry

What is the total no. Of atoms present in 25.0 mg of camphor

Chemistry

Calculate the mass in grams of 2.5*10^20 NO molecules

chemistry

How we make 0.02ppm solution in 25ml?

Chemistry

A Solution Has A PH Of 3.4.What Is Its Hydrogen Ion Concentration?

Chemistry

Zn(s)+HCl(aq)--> ZnCl2(aq)+H2(g) net ionic??

chemistry

What is the wavelength of radiation whose frequency is 5.93 x 10^14 s-1

Chemistry

What is the solvent in70% of alchol solution?

Chemistry

How to prepare 250ml of 2.5m solution of HCL

Chemistry

Formula of (ch3ch2)2chch2ch(ch3)2

Chemistry

complete and balance NaHCO3 (aq) + H2SO4 (aq)

Chemistry 1

Calculate q when 22.0 g of water is heated from 25.0°C to 100.0°C.

Chemistry

Solubility of PbCl2 in brine solutions

Chemistry

how many chloride ions are in 0.28 mol MgCl2?

Chemistry

How do i prepare KH2PO4-KOH buffer 0.2 M of pH 7.4?

Chemistry

Given 1 cc of Zinc and 1 cc of Cr What is the mass difference?

chemistry

Which is more ionic LiF or NaF and why

Chemistry

What is the value of [h3o] in a solution where [oh]=4.20x10^-6

Dr.Bob Chemistry

Is HOET associated with E1 or E2? I think it is E2.

Chemistry

h2po4(aq) + co34(aq) hco3 (aq) + hpo42 (aq)

Chemistry 30

How to find Oxidation Numbers of any component

Chemistry

How many aluminum atoms are there in 15.0mg of Al2O3?

Chemistry

How much Zn is mixed with 2HCl = ZnCl + H2 ?

chemistry

density of sand =3.00g/cm3?

chemistry

determine d no of moles in d following samples 2.5*10

chemistry

Determine the [OH^-] of a solution that is 0.145 M in CO3^2-.

Chemistry

Iron+CON Hydrochloric acid =?

chemistry

How is sulphur manufactured in a large scale

Chemistry

What will burning of .3 liters of C2H2 produce?

Chemistry

How many grams of AlCl3 are produced when 53.0 g of Al reacts?

Chemistry

Calculate the pH of HCL if you have 10.0g in 5.0L of solution

Chemistry

Compunds formed by NH4+ and NO3-

Chemistry 112

Can rate of law be a decimal??

Chemistry

How many representative particles are in 2.5 mol H2O2?

Math/Chemistry

How to rearrange the given equation for Ao: ln (Ao/A) = k*t

Math/Chemistry

How to rearrange the given equation for A: ln (Ao/A) = k*t

chemistry, science

how many moles of he atoms are there in 0.02g of he?

Chemistry

Identify the chemical reactants in ZnCl2(aq)+H2(g)?

Chemistry

How to calculate the percentage of chlorine isotopes

chemistry

What is the gas produced when lime is heated?

chemistry

. What is the pH of a solution in which 15 mL of 0.10 M NaOH is added to 25 mL of 0.10 M HCl?

Chemistry

what is the oxidation number of Carbon in C6H12? thank you!

Chemistry

how many sigma and pi bonds in hooc-cooh

Chemistry

How many g of KCl are need to make 2.5 L of a 10% (w/v) solution?

chemistry

how can I calculate the limiting reactor in a reaction?

Chemistry

What is the equilibrium constant for the following reaction? 3A + 2B <---> 2C

Chemistry

How would I balance Al2 + I2>ALI3

Chemistry

Calculate the ZnCO3 in a buffer solution with a pH of 9.83

chemistry

4Fe2(S)+ 11H2O(g) to give 2Fe2O2

Chemistry

What is the molar mass of feso4 . 7h2o

Chemistry

What are the changes associated with a chemical reaction?

Chemistry

Kg/m^2 is the unit of pressure how i prove it. Please help me.

chemistry

how to calculate the oxidation state for 'cr' in K2CRO4 ?

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