chemistry! URGENT

60,378 results, page 88

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

chemistry

capacity of the drink is 4.18 J/g·°C? (Assume that the heat transfer is 100% efficient.)

chemistry

why is the 5th ionisation energy(IE) of carbon so much larger than its 4th?

chemistry

How do you calculate the number of grams of solute in 0.250 L of 0.175 M \rm KBr?

chemistry

2C2H6(g) + 7O2(g) > 4CO2(g) + 6H2O(g) KCl(s) > K(s) + Cl2(g) is this balanced?

Chemistry

a mole of ethanol weighs only 46g; how many molecules does it contain?

Chemistry

Why does beta radaiation take place? If there is a website that can help me please post it. Thanks

Chemistry

Why would it be better to titrate a solution rather than just dilute it?

chemistry

1L soulution has a pH of 6 how many OH- would it tak eto make it a pH7 solution?

Chemistry

What is the total molar concentration of ions in a .200M solution of AlCl3

chemistry

was is the copper 2 carbonate's mass expected to do down after heating

chemistry

nitroglycerin (used medically as a vasodilator to treat heart conditions): {\rm C} 15.87\% {\rm H} 2.22\% {\rm N} 18.50\% {\rm O} 63.41\%.

CHemistry

The concentration of sodium chloride in an aqueous solution that is 2.23 M and that has a density of 1.01 g/mL is __ % by mass.

chemistry

what fraction of the total mass of an 56Fe atom is due to the electrons?

chemistry

What is the net ionic equation for calcuim ion and ammonium oxalate?

Chemistry

What difficulty may result if a chromatographic column is not placed in a vertical position?

chemistry

write a balanced equation for the reaction of aluminum with platinum and chloride.

Chemistry

What is the mass in grams of 4.556 x 10^30 lead atoms? Also the work.

chemistry

Determine the oxidation state for the second element in Zn3(PO4)2 Thank you!

Chemistry

How many ions are produced when a formula unit of Li2CO3 is dissolved in water?

Chemistry 2

How many grams of O2 will dissolve in 2.50L of H2O that is constant with pure O2 at 1.00atm?

chemistry

How much heat is released when one gram of toluene burned?

chemistry

write the balanced net ionic equation for this reaction Ba(OH)2+HCL-->

chemistry

wHAT IS THE MOLALITY OF A SOLUTION MADE BY DISSOLVING 43.3 GRAMS OF SODIUM CHLORIDE?

chemistry

How many grams of HCOOH are needed to make 3.7 liters of aqueous solution of pH=3.5?

Organic Chemistry

2 methyl-2-propanol is treated with 9M H2S04. What is the mystery product?

Chemistry

Predict the empirical formula of the ionic compound, Cs and C. How would I do this? Is it Cs_2C?

Chemistry

Find the average kinetic energy per molecule of He at 30 degrees C

chemistry

What mass of hydrochloric acid (in grams) can be neutralized by 2.7 of sodium bicarbonate?

chemistry

what is the net ionic equation for FeSO4 + KCl = FeCl2 + K2SO4?

chemistry

A 200 mL sample of 1.0 M nitric acid is added to 1.0 M water. What is the resulting pH?

chemistry

express liquid pentanol and gaseous oxygen as a chemical reaction

chemistry

how many milliliters of 6.00 M HCl are required to react with 60.0 ml of 1.96 M Al(OH)3? Al(OH)3(s)+3HCl(aq)-->AlCl3(aq)+3H2)(aq)

Chemistry

How many g of sodium nitrate do I need to make one Liter of 15% m/v solution?

Chemistry

What mass of hydrochloric acid (in grams) can be neutralized by 2.7g of sodium bicarbonate?

chemistry

How many moles of FeCl3.6H2O are required to make 10.00 mL of 1.50 M stock solution?

Chemistry

HNO3+NaOH --- H2O+NaNO3 What is formed in the solution besides Cu(OH)2?

chemistry

an atom of cesium cs has 55 protons 55 electrons and 77 neutrons true false

chemistry

Calculate the molarity for 25mL of H2C2O4 in a titration with 12.46mL of KMnO4

Chemistry

Is DrBob222 available tonight? Please let me know, I need some chem help.

chemistry prt 2

What is the net ionic equation of the reaction of MgCl2 with NaOH

chemistry prt 3

What is the net ionic equation of the reaction of MgSO4 with NaOH

chemistry

What is the final temperature of a 52 gram glass of water at 2.0 C if it absorbs 3.0 J heat?

chemistry

At what temperature (oC) will a gas sample occupy 6.1 L if it originally occupies 17.8 L at 27.1oC?

chemistry

net ionic equations of nitric acid with CO3 2- and with PO4 3-.

chemistry

what is the pH of a solution prepared by adding 20.00 mL 0f a 0.10 M acetic acid and 10.00 mL of 0.10 M sodium acetate

chemistry

What ions separate once added to water and how did the reaction occur?

chemistry

What ions separate once added to water and how did the reaction occur?

chemistry

What ions separate once added to water and how did the reaction occur?

Chemistry

How many moles of solute particles are present in 1 L of aqueous 0.08 M ethanol (C2H5OH)?

chemistry

Calculate the number of moles of CaCO3 in 3.20g of Calcium Carbonate.

chemistry

if 125 ml of H2O is added to 50 ml of 0.35 M NaCl, what is the molarity of the resulting solution?

chemistry

give 2 commercial or practical uses of this flame color phenomena.

Chemistry

How do you find unpaired electrons in a metal ion in CuSO4·5H20?

chemistry

what is the net ionic equation for manganese sulfide and hydrobromic acid?

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