chemistry! URGENT

59,905 results, page 87

chemistry

does any one know how to write cis-2,3-dibromo-2-hexene formula? Please help!

Chemistry

What is the product of a grignard reaction of bromotoluene and co2 as starting materials?

Gen chemistry

What is the hydronium ion concentration of an acid rain sample that has a pH of 3.45?

chemistry

is molar enthalpy affected if the system is a solid rather than a liquid

Chemistry

What three conversion factors are often used in mole conversions?

chemistry

when 5.0 g of CaCl2 is dissolved in 50 g of water, how do you get the boiling temperature of 101.5 degree c

chemistry

can the concentrations of reactant and products affect the directions of equilibrium constant

chemistry

Which of the following groups of elements is arranged in order of increasing electronegativity? a. Br < Li < C b. K < Mg < O c. Na < K < N d. Mg < Li < C e. Ca < Cl < C

Chemistry

Which element can form more than one kind of monatomic ion? 1. a. Se 2. b. Sn 3. c. S 4. d. Sr

chemistry

What is the pH of the solution created by combining 8.00 mL of the 0.10 M NH3 with 8.00 mL of the 0.10 M HCl? I found their moles= 8*10^(-4)

chemistry

What volume of 12M HCl must be diluted to make 2L of solutioin with a pH of 4?

chemistry

What are the missing nuclear symbols for the bombardment reation? 25/13Al + 30/15? >>> 30/15P + 1/0n

Chemistry

If 55.0 kJ of heat are added to 20.0 g of water at 20oC, what is the final temperature of the system?

Chemistry

What equation is used when talking about airplane cabin pressure?

chemistry

Which of the following is a weak acid? A)HN03 B)H3P04 C)NH3 D)C03^2- E)OH

Chemistry

Write a balanced chemical reaction showing how the 4.99 g Sn dissolves in HNO3.

chemistry

Which of these pressures is the lowest? 1.1 atm, 16.7 psi, 740 mm Hg, 111 458 Pa

chemistry

What volume of SO2 will result from the complete burning of sulfer in 8L of oxygen?

College Chemistry

Does Vapor Pressure decrease as intermolecular forces increase???

chemistry(check my answer)

For the cell: C(s) C+(aq) B+(aq) B(s). Metal ______ is the "negative" electrode. is it C(s)

Chemistry

what particle is emitted from the nucleus during a proton and neutron decay?

chemistry

how to find the volume of oxygen at STP from the Deoomposition of 10.8 g of mercuric oxide?

college Chemistry

What is thhe pH of 500mL of solution containing 0.0124 grams of Ca(OH)2?

chemistry

at what temperature would the sloubility level of 50 g KCL in 100 g H2O?

chemistry

what happen when a solution of NaoH is add in drop and then in excess to Cacl

chemistry

How much energy is released when 2.55kg of diethyl ether freezes?

chemistry

What is the concentration (in % mass) of a solution in which you dissolve 200 mg of NaHCO3 in 1.0 L of water?

chemistry

How many mL of 0.750 M HCl are needed to neutralize 14.89 mL of 0.350 M NaOH? ____ mL

chemistry

What is the IUPAC name of the following compounds? CH3 I CH3CHCH2CH2CHCH2CH3 I CH2CH3

chemistry

17.9 moles of NaOH in 500 ml of water? please tell me the answer

chemistry

find the molarity of 9.0*10 (to the -4 power) moles of Mg(OH)2 in 1500 ml of water. what is the answer?

Chemistry

Is 10.0 mL of 0.10 M NH4Cl added to 10.0 mL of 0.10 M HCl a basic buffer? I think Yes. Right?

Chemistry

What is the name of the product when cinnamaldehyde and cyclopentanone undergo aldo condensation?

chemistry

how do i write a procedure for making a 100mL of 0.5 M solution of sodium phosphate

chemistry

What gas volume does the water have at a temperature of 100 and 1 pressure?

Chemistry 212

What is the solubility of RaSO4 in 0.1381M Na2SO4? Ksp = 4.3x10^-11?

chemistry

how many grams of ammonium sulfate are needed to make a .25 M solution at a concentration of 6M?

Chemistry

Calculate the [H3O+] when 1.65 grams of KOH are dissolved in 500.0 mL of solution

chemistry

what you would do to prepare 100.0g of a 3.5% solution of ammonium sulfate in water

SCIENCE?CHEMISTRY***

an 56 Fe 2+ particle has how many protons neutrons amd electrons??? 56 2+ Fe Thanks Andy

chemistry

How many significant figures are in each of the following a.234 b. 2500 c.0.0034. d. 12.00 e. 0.01010

chemistry

How much heat does calcium oxide produce when dissolved in water?

Chemistry

Why is the sign for cathode positve and anode is negative in the galvanic cell?

chemistry

calculate the volume of .100 M KOH required to titrate 50 ml of .15 M HCl

chemistry

write and balanced equation for the formation of magnesium nitride from it elements

chemistry

what volume of HCl gas is needed to neutralise 50 ml of 0.1M NaOH at stp?

chemistry

what is the formula of a compuond formed by combining 50g. of element X and 32 g. of oxygen

chemistry

Why must a balanced chemical equation be used when determining Keq?

chemistry

How are the formation of aqueous solutions of sodium chloride and sucrose similar?

chemistry

What is the concentration of OH– ions formed when 40.0 g of NaOH is dissolved in 250 mL H2O?

chemistry

what is the molarity of a solution, if 12.0 g of KCl is dissolved into 500mL of H20

chemistry

the main difference between isotopes of the same element has to do with the number of

chemistry

What Causes the cap to pop off a bottle of orange juice?

chemistry

How can one create an experiment that will deteremine the Ksp of a solid like Ca(OH)2

chemistry

why should you be care when you heat your NacL solution to evaporate the water?

Chemistry

2.7g of Ag2Co3 on being heated strongly yields a residue weighing.......

chemistry

What quantity of ice at 2 deg Celsius can be melted by 100 J of heat?

chemistry

What is the name of this compound CH3CHCH2CH3 ...| ...OH (this should fall directly under "CH")

Chemistry

What is the equation for the synthesis of isopropyl butanoate from isopropanol and butanoic acid

chemistry

When a 16.9-g sample of NaOH dissolves in 70.0 g of water in a calorimeter, the temperature rises from 22.4°C to 86.6°C.

chemistry

what is the volume of 4.37 moles of an ideal gas at 26.5 degrees celsius and 1.00 atm?

chemistry

The hydrogen-ion concentration of a 0.25 M solution of HCN (Ka = 4.9 ´ 10-10) is I keep getting 1.1 *10^-5

chemistry

How do you know when you have added too much standard base(exceeded the endpoint)?

chemistry

Why is it unnecessary to measure precisely 25.00 ml of unknown acid into the beaker?

chemistry

calculate the densities of each of the following gases in g/L at STP: a. F2 b. CH4 c. Ne d. SO2

chemistry

the announced attendance at a football game was 52,806. is this an exact number?

chemistry

Why is it that biochemists often remember the pKa of weak acids, rather than Ka?

chemistry

Calculate the pH for each of the following solutions: (a) 0.10 M NH3 (b) 0.050 M C5H5N (pyridine)

chemistry

with the numbers 3, 7, 10 & 12 how you you make up the number 800 using different functions?

chemistry

calculate the number of oxygen atoms in 49grams of sulfuric acid ?

chemistry

calculate [H30+],pH,[OH-] and pOH for .025 M nitric acid (HNO3)??

chemistry

Calculate the energy released when 200 g of ethanol are cooled from 30.0 oC to 5.00 oCeased when

Chemistry

I am having figuring out the Lewis Dot Structure of ICl2-? Can anyone help???

chemistry

Tums is added to 30.0 of 0.400m of HCL , how many grams of CO2gas are produced?

chemistry

how many milligrams of PbI2 can you dissolve in 300 mL of water at 25 degrees celcius

Chemistry

How many calories of heat are needed to raise 10 g water from 20 to 21 degree celcius

chemistry

How do you know if these solutions are acidic, basic, or nearly neutral? a. NH4NO2 b. Cr(NO3)3

chemistry

If 0.60 mg of KCl is present in 3.0 L of aqueous solution, what is the concentration in terms of the following?

chemistry

Any reaction that absorbs 150 kcal of energy can be classified as ________.

chemistry

why is it that [H2O] is NOT included in the rate law, even though it is a reactant?

chemistry

why is it that [H2O] is NOT included in the rate law, even though it is a reactant?

Chemistry

Which solution has a higher vapor pressure, 1 M NaCl or 1 M glucose(C6H12O6)?

analytical chemistry

why should EDTA solution be stored in polyethylene container?

organic chemistry

describe the crystals formed through slow crystallization

organic chemistry

what type of impurity is associated with large crystals? Explain.

chemistry

Calculate the volume of 6.00 moles O2 gas at 30cm Hg and 72 degrees farenheit, thanks.

chemistry

Home many drops of 0.1M HCl is needed to neutralize 10mL of 1M NaOH?

chemistry

how many moles of LiF would be required to produce a 2.5 M solution with volume of 1.5 M?

Chemistry

Sorry. What I meant was: How do we improve the efficiency of Flash Column Chromatography?

analytical chemistry

how cam the amount of chlorine in [Ni(NH3)6]Cl2 be determined

chemistry

Vapor pressure ___________ as the temperature of the liquid in equilibrium with it decreases.

Chemistry

what are the 3 levels of protein structures and how do bonding and intermolecular forces relate to this?

Chemistry

what are the 3 levels of protein structures and how do bonding and intermolecular forces relate to this?

chemistry

Vapor pressure ___________ as the temperature of the liquid in equilibrium with it increases.

chemistry

1) A 3-fold degenrate subshell can carry a maximum number of how many electrons?

chemistry

what are effect of the nitrate or chloride ion in the solutions on the color emission?

chemistry

What is the positively charged part of an atom called? electron or proton

chemistry

Write formulas for the compounds that form from {\rm Rb} and each of the following polyatomic ion: {\rm NO}_{3}^{-}, {\rm SO}_{4}^{2-}, {\rm PO}_{4}^{3-}.

chemistry

How many oxygen atoms are in 10.3 g of CuSO4*5H2O? What is the mass percent of carbon in C(12)H(22)O(11)?

chemistry

How many grams of Li3N can theoretically be produced from 1.77 moles of Li? 6Li+N2 = 2Li3N

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